Long Neck End Mills

Stable Deep Slotting with Long Neck End Mills

Long Neck End Mills Design Highlights

Micro Grain Material
Advanced Coatings
Variable Helix Angle
Reinforced Core Design
Large Chip Flute
Long Neck Geometry

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Full Range of Long Neck End Mills

X-STANDARD

SLN4F-BZ - 4-Flute Long Neck Flat End Mill for Steel

High rigidity & Excellent wear resistance

P: Steel
K: Cast Iron
Slot Milling
Side Milling
Plunging
Roughing
Helix Milling
Step Milling
HRC＜35
BZ: Bronze

SLN3F-HB - 3-Flute Long Neck Flat End Mill for Aluminum

Sharp cutting edge & Anti-adhesion

N: Non-ferrous
Slot Milling
Side Milling
Plunging
Roughing
Helix Milling
Step Milling
HB: Highlight Bright

LN2B-BZ - 2-Flute Long Neck Ball Nose End Mill for Steel

Large chip space & High heat resistance

P: Steel
K: Cast Iron
Slot Milling
Profiling
Helix Milling
Slope Milling
HRC＜35
BZ: Bronze

SLN2B-HB - 2-Flute Long Neck Ball Nose End Mill for Aluminum

High precision milling & Long reach design

N: Non-ferrous
Slot Milling
Profiling
Helix Milling
Slope Milling
HB: Highlight Bright

SLN4R-BZ - 4-Flute Long Neck Corner Radius End Mill

Low cutting resistance & Stable machining

P: Steel
K: Cast Iron
Slot Milling
Side Milling
Plunging
Roughing
Profiling
Helix Milling
Slope Milling
Step Milling
Drilling
HRC＜35
BZ: Bronze

SML2F-BZ - 2-Flute Micro Long Neck Flat End Mill for Steel

High precision & Superior machining stability

P: Steel
K: Cast Iron
Slot Milling
Side Milling
Plunging
Helix Milling
Step Milling
Drilling
HRC＜35
BZ: Bronze

SML2F-HB - 2-Flute Micro Long Neck Flat End Mill for Aluminum

Sharp edge & Smooth chip evacuation

N: Non-ferrous
Slot Milling
Side Milling
Plunging
Helix Milling
Step Milling
Drilling
HB: Highlight Bright

SML2B-BZ - 2-Flute Micro Long Neck Ball Nose End Mill for Steel

High precision & Stable cutting performance

P: Steel
K: Cast Iron
Profiling
Helix Milling
Slope Milling
Drilling
HRC＜35
BZ: Bronze

SML2B-HB - 2-Flute Micro Long Neck Ball Nose End Mill for Aluminum

Fine surface finish & Anti-adhesion

N: Non-ferrous
Profiling
Helix Milling
Slope Milling
Drilling
HB: Highlight Bright

X-ULTIMATE

ULNP4F-BK - 4-Flute Long Neck Flat End Mills

Wide application & Stable cutting

P: Steel
M: Stainless Steel
K: Cast Iron
Slot Milling
Side Milling
Plunging
Helix Milling
Step Milling
Drilling
HRC＜52
BK: Black

ULNP2B-BK - 2-Flute Long Neck Ball Nose End Mills

High precision & Stable contouring

P: Steel
M: Stainless Steel
K: Cast Iron
Side Milling
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜52
BK: Black

ULNP4R-BK - 4-Flute Long Neck Corner Radius End Mills

High rigidity & Low cutting resistance

P: Steel
M: Stainless Steel
K: Cast Iron
Slot Milling
Side Milling
Plunging
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜52
BK: Black

ULNT4F-GD - 4-Flute Long Neck Flat End Mills

Large core diameter & High rigidity

P: Steel
H: Hardened Steel
Slot Milling
Side Milling
Plunging
Helix Milling
Step Milling
Drilling
HRC＜60
GD: Gold

ULNT2B-GD - 2-Flute Long Neck Ball Nose End Mills

High wear resistance & Smooth contouring

P: Steel
H: Hardened Steel
Side Milling
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜60
GD: Gold

ULNT4R-GD - 4-Flute Long Neck Corner Radius End Mills

High hardness & Stable milling

P: Steel
H: Hardened Steel
Slot Milling
Side Milling
Plunging
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜60
GD: Gold

ULNH4F-BK - 4-Flute Long Neck Flat End Mills

Ultra-high hardness & Excellent wear resistance

H: Hardened Steel
Slot Milling
Side Milling
Plunging
Helix Milling
Step Milling
Drilling
HRC＜68
BK: Black

ULNH2B-BK - 2-Flute Long Neck Ball Nose End Mills

Smooth chip evacuation & Precision contouring

H: Hardened Steel
Side Milling
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜68
BK: Black

ULNH4R-BK - 4-Flute Long Neck Corner Radius End Mills

High rigidity & Stable cutting

H: Hardened Steel
Slot Milling
Side Milling
Plunging
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜68
BK: Black

ULNA4F-RB - 4-Flute Long Neck Flat End Mills

High rigidity & Wide application

P: Steel
H: Hardened Steel
S: Super Alloy
N: Non-ferrous
Slot Milling
Side Milling
Plunging
Helix Milling
Step Milling
Drilling
HRC＜68
RB: Rainbow

ULNA2B-RB - 2-Flute Long Neck Ball Nose End Mills

Stale contouring & Smooth surface finish

P: Steel
H: Hardened Steel
S: Super Alloy
N: Non-ferrous
Side Milling
Profiling
Helix Milling
Slope Milling
Step Milling
HRC < 68
RB: Rainbow

ULNA4R-RB - 4-Flute Long Neck Corner Radius End Mills

Low cutting resistance & Stable cutting

P: Steel
H: Hardened Steel
S: Super Alloy
N: Non-ferrous
Slot Milling
Side Milling
Plunging
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜68
RB: Rainbow

UMLP2F-BK - 2-Flute Micro Long Neck Flat End Mills

High hardness & Micro machining

P: Steel
M: Stainless Steel
K: Cast Iron
Slot Milling
Side Milling
Helix Milling
Step Milling
HRC＜52
BK: Black

UMLP2B-BK - 2-Flute Micro Long Neck Ball Nose End Mills

High precision & Smooth contouring

P: Steel
M: Stainless Steel
K: Cast Iron
Side Milling
Profiling
Helix Milling
Slope Milling
HRC＜52
BK: Black

UMLP2R-BK - 2-Flute Micro Long Neck Corner Radius End Mills

High precision & Low cutting resistance

P: Steel
M: Stainless Steel
K: Cast Iron
Slot Milling
Side Milling
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜52
BK: Black

UMLT2F-GD - 2-Flute Micro Long Neck Flat End Mills

High hardness & Stable machining

P: Steel
H: Hardened Steel
Slot Milling
Side Milling
Helix Milling
Step Milling
HRC＜60
GD: Gold

UMLT2B-GD - 2-Flute Micro Long Neck Ball Nose End Mills

Fine contouring & Micro machining

P: Steel
H: Hardened Steel
Side Milling
Profiling
Helix Milling
Slope Milling
HRC＜60
GD: Gold

UMLT2R-GD - 2-Flute Micro Long Neck Corner Radius End Mills

Rigid edge & Fine finishing

P: Steel
H: Hardened Steel
Slot Milling
Side Milling
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜60
GD: Gold

UMLH2F-BK - 2-Flute Micro Long Neck Flat End Mills

Strong edge strength & High heat resistance

H: Hardened Steel
Slot Milling
Side Milling
Helix Milling
Step Milling
HRC＜68
BK: Black

UMLH2B-BK - 2-Flute Micro Long Neck Ball Nose End Mills

Excellent wear resistance & Smooth contouring

H: Hardened Steel
Side Milling
Profiling
Helix Milling
Slope Milling
HRC＜68
BK: Black

UMLH2R-BK - 2-Flute Micro Long Neck Corner Radius End Mills

Tough cutting edge & High precision milling

H: Hardened Steel
Slot Milling
Side Milling
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜68
BK: Black

UMLN2F-RB - 2-Flute Micro Long Neck Flat End Mills

Sharp cutting edge & Smooth chip evacuation

P: Steel
H: Hardened Steel
S: Super Alloy
N: Non-ferrous
Slot Milling
Side Milling
Helix Milling
Step Milling
HRC＜68
RB: Rainbow

UMLN2B-RB - 2-Flute Micro Long Neck Ball Nose End Mills

Smooth cutting & Fine surface finish

P: Steel
H: Hardened Steel
S: Super Alloy
N: Non-ferrous
Side Milling
Profiling
Helix Milling
Slope Milling
HRC＜68
RB: Rainbow

UMLN2R-RB - 2-Flute Micro Long Neck Corner Radius End Mills

Sharp edge & Reduced cutting load

P: Steel
H: Hardened Steel
S: Super Alloy
N: Non-ferrous
Slot Milling
Side Milling
Profiling
Helix Milling
Slope Milling
Step Milling
HRC＜68
RB: Rainbow

Why choose our high-performance long neck end mills?

JINOO long neck end mills are designed for deep cavity machining. With optimized flute geometry, reinforced core structure, and advanced coatings, our long neck end mills can deliver stable cutting performance for steel and aluminum machining.

Micro Grain Material

Our long neck end mills use premium ultra-fine micro grain materials, with grain sizes ranging from 0.2 to 0.8μm.

Advanced Coatings

JINOO long neck end mills use advanced Oerlikon Balzers coatings, including AlTiN, AlTiSiN, AlCrN, AlCrTiN, TiAlN, TiSiXN, and DLC.

Variable Helix Angle

We provide helix angles of 30° and 35°. Besides variable helix angles, such as 35°/38° and 39.5°/40.5°, are available.

Reinforced Core Diameter

The core diameter of our long neck end mills is larger than conventional end mills. Reinforced core design improves rigidity.

Large Chip Flute

The long neck end mills use a large chip flute design, offering sufficient chip removal space.

Long Neck Geometry

The neck diameter behind the cutting edge is reduced to provide additional space in deep cavities and narrow pockets.

Technical Details of Long Neck End Mills

Ultra-fine Grain Carbide for High Hardness

Compared with conventional carbide rods, our ultra-fine carbide increased hardness by 15-25%. They deliver better wear resistance and superior edge integrity.

Advanced Coatings for Extended Tool Life

Advanced nano coatings improve heat resistance and reduce friction. Their oxidation resistance can reach up to 1100°C, so tool life can be increased by 2-3 times.

Variable Helix Geometry for Low Vibration

30° helix angle for high edge rigidity and steel machining. 35° helix angle for balanced permanence and general machining. Variable helix angle disrupts harmonic frequencies and reduces vibration by 30%.

Reinforced Core for Stable Cutting Performance

The reinforced core improves tool rigidity and extends life. This design can improve machining stability in long overhang machining.

Large Flutes for Efficient Chip Evacuation

Optimized flute geometry ensures smooth chip evacuation and prevents chip build-up. The chip space increases by 15%-20%.

Long Neck Geometry for Deep-reach Machining

Compared with conventional milling tools, long neck end mills can increase machining depth by 2-5 times. They are widely used in the mold, aerospace, and medical industries.

Geometry Breakdown of Long Neck End Mills

Technical Data

Cutting Diameter Tolerance	H6
Coating	AlTiN / AlTiSiN / AlCrSiN / TiAlN / DLC
Flute Number	2 / 3 / 4Flutes / Customised Number
Overall Length	50 / 60 / 75 / 100 / 150 / 200mm / Customised Length
Shank Diameter	4 / 6 / 8 / 10 / 12 / 14 / 16/ 18 / 20mm / Customised Diameter

Long Neck End Mills Specifications

Solid carbide long neck end mills with different cutting parameters are available.

Recommended Cutting Parameters
Quick Selection Guide
Carbide Substrate
Size Chart

Workpiece material	Aluminum alloy 5052、6061、7075 General machining center (10000rpm Max)				Aluminum alloy 5052、6061、7075 High speed machining center (24000rpm Max)
Designation	s/min⁻	Vf/mm/min	ap/mm	ae/mm	s/min	Vf/mm/min	ap/mm	ae/mm
D1	9500-10000	900-1200	0.1-0.2	1	23000-24000	1200-1500	0.1-0.2	1
D1.5	9000-9500	1000-1300	0.2-0.4	1.5	21000-22000	1600-1900	0.2-0.4	1.5
D2	9000-9500	1100-1400	0.2-0.5	2	19000-20000	1400-1800	0.2-0.5	2
D3	8500-9000	1200-1600	0.4-0.8	3	18000-19000	1800-2000	0.4-0.8	3
D4	8500-9000	1200-1600	0.5-1	4	17000-18000	1800-2200	0.5-1	4
D6	8500-9000	1500-2000	0.8-2	6	11500-12500	2200-2600	0.8-2	6
D8	7800-8300	1600-2200	1-3	8	11000-12000	2500-2800	1-3	8
D10	7800-8300	2000-2500	2-4	10	9000-9500	2600-3000	2-4	10
D12	5800-6300	2200-2800	3-5	12	7800-8300	2600-3200	3-5	12

Materials		Workpiece Materials	Type
ISO
P	P1	Free-Cutting Steel	UP / UT / UK / UM / US / UHT / UR / S65 / S60 / S58 / S55 / SM / SEU / SR
	P2	Low Carbon Steel（C<0.25%）
	P4	Medium Carbon Steel(0.25%<C<0.60%), Low Alloy Steel
	P5	Alloy Steel, Quenched and Tempered Steel
	P6	High Carbon Steel（C>0.6%）
	P11	Ferritic Stainless Steel, Martensitic Stainless Steel
H	H5	Quenched and Tempered Steel	UP / UH / UT / UK / UM / UHT / UR / S68 / S65 / SEU
	H7	Bearing Steel
	H8	Tool Steel, High Speed Steel
	H12	Hardened Stainless Steel
	H21	Zinc-Plated Steel
M	M1	Austenitic Stainless Steel	UP / UK / UM / US / UR / S65 / S60 / S58 / SM / SEU
	M2	High-Strength Austenitic Stainless Steel
	M4	Duplex Stainless Steel
S	S1	Iron-Based Superalloy	UM / US / UR / SM
	S2	Cobalt-Based Superalloy
	S3	Nickel-Based Superalloy
	S11	Titanium Alloy (Low Alloy)
	S13	Titanium Alloy (High Alloy)
K	K1	Gray Cast Iron	UP / UK / UM / UR / S65 / S60 / S58 / S55 / SEU / SR
	K2	Compacted Graphite Iron（CGI）
	K3	Malleable Cast Iron
	K4	Ductile Cast Iron
N	N1	Aluminum-Silicon Alloy,Silicon content<9%	UA / SA / SR
	N2	Silicon-Aluminum Alloy,9%<Silicon content<16%
	N3	Silicon-Aluminum Alloy,Silicon content>16%
	N4	Cast Aluminum Alloy
	N5	Wrought Aluminum Alloy
	N10	Copper
	N11	Copper Alloy

Grain size	Feature	Suitable materials	Advantage
0.2μ	Ultra-fine grain, extremely high hardness, very sharp cutting edge	Hardened steel (HRC60+), stainless steel, titanium alloys, micro-diameter tools	Excellent wear resistance & edge sharpness, ideal for high-precision finishing, but lower toughness
0.4μ	Ultrafine grain, excellent hardness-toughness balance	hardness-toughness balance Hardened steel, stainless steel, alloy steel, precision mold steel	High wear resistance with good edge stability, suitable for finishing & semi-finishing
0.6μ	Fine grain, balanced performance	Carbon steel, alloy steel, stainless steel, cast iron (general conditions)	Good balance of wear resistance and toughness, versatile general-purpose grade
0.7μ	Medium-fine grain, improved toughness	General steel, low-alloy steel, interrupted cutting conditions	Better resistance to chipping, suitable for semi-roughing and unstable cutting
0.8μ	Medium grain, high toughness	Low carbon steel, rough machining, heavy interrupted cutting	Strong impact resistance, suitable for roughing and demanding cutting stability

Type No.	D	Lc	R	L	d	Specification
4R	1	3	0.1	50	4	1R0.13450L
4R	1	3	0.2	50	4	1R0.23450L
4R	1.5	5	0.1	50	4	1.5R0.15450L
4R	1.5	5	0.2	50	4	1.5R0.25450L
4R	1.5	5	0.3	50	4	1.5R0.35450L
4R	1.5	5	0.5	50	4	1.5R0.55450L
4R	2	6	0.1	50	4	2R0.16450L
4R	2	6	0.2	50	4	2R0.26450L
4R	2	6	0.3	50	4	2R0.36450L
4R	2	6	0.5	50	4	2R0.56450L
4R	2.5	8	0.2	50	4	2.5R0.28450L
4R	2.5	8	0.5	50	4	2.5R0.58450L
4R	3	9	0.1	50	4	3R0.19450L
4R	3	9	0.2	50	4	3R0.29450L
4R	3	9	0.5	50	4	3R0.59450L
4R	3	9	1	50	4	3R19450L
4R	3.5	10	0.5	50	4	3.5R0.510450L
4R	4	10	0.1	50	4	4R0.110450L
4R	4	10	0.2	50	4	4R0.210450L
4R	4	10	0.3	50	4	4R0.310450L
4R	4	10	0.5	50	4	4R0.510450L
4R	4	10	0.5	50	6	4BK0.510650L
4R	4	10	1	50	4	4R110450L
4R	4	10	1.5	50	4	4R1.510450L
4R	5	13	0.2	50	6	5R0.213650L
4R	5	13	0.5	50	5	5R0.513550L
4R	5	13	0.5	50	6	5R0.513650L
4R	5	13	1	50	5	5R113550L
4R	5	13	1	50	6	5R113650L
4R	5	13	2	50	6	5R213650L
4R	6	15	0.1	50	6	6R0.115650L
4R	6	15	0.2	50	6	6R0.215650L
4R	6	15	0.5	50	6	6R0.515650L
4R	6	15	1	50	6	6R115650L
4R	6	15	1.5	50	6	6R1.515650L
4R	6	15	2	50	6	6R215650L
4R	8	20	0.2	60	8	8R0.220860L
4R	8	20	0.5	60	8	8R0.520860L
4R	8	20	1	60	8	8R120860L
4R	8	20	1.5	60	8	8R1.520860L
4R	8	20	2	60	8	8R220860L
4R	8	20	2.5	60	8	8R2.520860L
4R	8	20	3	60	8	8R320860L
4R	10	25	0.2	75	10	10R0.2251075L
4R	10	25	0.3	75	10	10R0.3251075L
4R	10	25	0.5	75	10	10R0.5251075L
4R	10	25	1	75	10	10R1251075L
4R	10	25	1.5	75	10	10R1.5251075L
4R	10	25	2	75	10	10R2251075L
4R	10	25	3	75	10	10R3251075L
4R	12	30	0.2	75	12	12R0.2301275L
4R	12	30	0.3	75	12	12R0.3301275L
4R	12	30	0.5	75	12	12R0.5301275L
4R	12	30	1	75	12	12R1301275L
4R	12	30	1.5	75	12	12R1.5301275L
4R	12	30	2	75	12	12R2301275L
4R	12	30	3	75	12	12R3301275L
4R	12	30	5	75	12	12R5301275L
4R	14	35	0.5	100	14	14R0.53514100L
4R	14	35	1	100	14	14R13514100L
4R	16	40	0.5	100	16	16R0.54016100L
4R	16	40	1	100	16	16R14016100L
4R	16	40	1.5	100	16	16R1.54016100L
4R	16	40	2	100	16	16R24016100L
4R	16	40	3	100	16	16R34016100L
4R	16	40	5	100	16	16R54016100L
4R	20	50	1	100	20	20R15020100L
4R	20	50	2	100	20	20R25020100L
4R	20	50	3	100	20	20R35020100L
4R	1	3	0.2	75	4	1R0.23475L
4R	2	6	0.2	75	4	2R0.26475L
4R	2	6	0.5	75	4	2R0.56475L
4R	3	9	0.2	75	4	3R0.29475L
4R	3	9	0.3	75	4	3R0.39475L
4R	3	9	0.5	75	4	3R0.59475L
4R	3	9	1	75	4	3R19475L
4R	4	10	0.2	75	4	4R0.210475L
4R	4	10	0.3	75	4	4R0.310475L
4R	4	10	0.5	75	4	4R0.510475L
4R	4	10	0.5	100	4	4R0.5104100L
4R	4	10	0.5	75	6	4R0.510675L
4R	4	10	1	75	4	4R110475L
4R	4	10	1	100	4	4R1104100L
4R	5	13	0.2	75	6	5R0.213675L
4R	5	13	0.5	75	5	5R0.513575L
4R	5	13	0.5	75	6	5R0.513675L
4R	5	13	0.5	100	5	5R0.5135100L
4R	5	13	0.5	100	6	5R0.5136100L
4R	5	13	1	75	5	5R113575L
4R	5	13	1	75	6	5R113675L
4R	5	13	1	100	6	5R1136100L
4R	6	15	0.2	75	6	6R0.215675L
4R	6	15	0.2	100	6	6R0.2156100L
4R	6	15	0.5	75	6	6R0.515675L
4R	6	15	0.5	100	6	6R0.5156100L
4R	6	15	1	75	6	6R115675L
4R	6	15	1	100	6	6R1156100L
4R	6	15	2	100	6	6R2156100L
4R	8	20	0.2	75	8	8R0.220875L
4R	8	20	0.2	100	8	8R0.2208100L
4R	8	20	0.5	75	8	8R0.520875L
4R	8	20	0.5	100	8	8R0.5208100L
4R	8	20	0.5	150	8	8R0.5208150L
4R	8	20	1	75	8	8R120875L
4R	8	20	1	100	8	8R1208100L
4R	8	20	1.5	75	8	8R1.520875L
4R	8	20	1.5	100	8	8R1.5208100L
4R	8	20	2	75	8	8R220875L
4R	8	20	2	100	8	8R2208100L
4R	10	25	0.2	100	10	10R0.22510100L
4R	10	25	0.5	100	10	10R0.52510100L
4R	10	40	0.5	150	10	10R0.54010150L
4R	10	25	1	100	10	10R12510100L
4R	10	40	1	150	10	10R14010150L
4R	10	25	1.5	100	10	10R1.52510100L
4R	10	25	2	100	10	10R22510100L
4R	10	25	3	100	10	10R32510100L
4R	12	30	0.2	100	12	12R0.23012100L
4R	12	30	0.3	100	12	12R0.33012100L
4R	12	30	0.5	100	12	12R0.53012100L
4R	12	48	0.5	150	12	12R0.54812150L
4R	12	30	1	100	12	12R13012100L
4R	12	48	1	150	12	12R14812150L
4R	12	30	1.5	100	12	12R1.53012100L
4R	12	30	2	100	12	12R23012100L
4R	12	30	3	100	12	12R33012100L
4R	12	30	4	100	12	12R43012100L
4R	16	50	1	150	16	16R15016150L
4R	16	50	2	150	16	16R25016150L
4R	1	3	0.1	50	4	1R0.13450L
4R	1	3	0.2	50	4	1R0.23450L
4R	1.5	5	0.1	50	4	1.5R0.15450L
4R	1.5	5	0.2	50	4	1.5R0.25450L
4R	1.5	5	0.3	50	4	1.5R0.35450L
4R	1.5	5	0.5	50	4	1.5R0.55450L
4R	2	6	0.1	50	4	2R0.16450L
4R	2	6	0.2	50	4	2R0.26450L
4R	2	6	0.3	50	4	2R0.36450L
4R	2	6	0.5	50	4	2R0.56450L
4R	2.5	8	0.2	50	4	2.5R0.28450L
4R	2.5	8	0.5	50	4	2.5R0.58450L
4R	3	9	0.1	50	4	3R0.19450L
4R	3	9	0.2	50	4	3R0.29450L
4R	3	9	0.5	50	4	3R0.59450L
4R	3	9	1	50	4	3R19450L
4R	3.5	10	0.5	50	4	3.5R0.510450L
4R	4	10	0.1	50	4	4R0.110450L
4R	4	10	0.2	50	4	4R0.210450L
4R	4	10	0.3	50	4	4R0.310450L
4R	4	10	0.5	50	4	4R0.510450L
4R	4	10	0.5	50	6	4BK0.510650L
4R	4	10	1	50	4	4R110450L
4R	4	10	1.5	50	4	4R1.510450L
4R	5	13	0.2	50	6	5R0.213650L
4R	5	13	0.5	50	5	5R0.513550L
4R	5	13	0.5	50	6	5R0.513650L
4R	5	13	1	50	5	5R113550L
4R	5	13	1	50	6	5R113650L
4R	5	13	2	50	6	5R213650L
4R	6	15	0.1	50	6	6R0.115650L
4R	6	15	0.2	50	6	6R0.215650L
4R	6	15	0.5	50	6	6R0.515650L
4R	6	15	1	50	6	6R115650L
4R	6	15	1.5	50	6	6R1.515650L
4R	6	15	2	50	6	6R215650L
4R	8	20	0.2	60	8	8R0.220860L
4R	8	20	0.5	60	8	8R0.520860L
4R	8	20	1	60	8	8R120860L
4R	8	20	1.5	60	8	8R1.520860L
4R	8	20	2	60	8	8R220860L
4R	8	20	2.5	60	8	8R2.520860L
4R	8	20	3	60	8	8R320860L
4R	10	25	0.2	75	10	10R0.2251075L
4R	10	25	0.3	75	10	10R0.3251075L
4R	10	25	0.5	75	10	10R0.5251075L
4R	10	25	1	75	10	10R1251075L
4R	10	25	1.5	75	10	10R1.5251075L
4R	10	25	2	75	10	10R2251075L
4R	10	25	3	75	10	10R3251075L
4R	12	30	0.2	75	12	12R0.2301275L
4R	12	30	0.3	75	12	12R0.3301275L
4R	12	30	0.5	75	12	12R0.5301275L
4R	12	30	1	75	12	12R1301275L
4R	12	30	1.5	75	12	12R1.5301275L
4R	12	30	2	75	12	12R2301275L
4R	12	30	3	75	12	12R3301275L
4R	12	30	5	75	12	12R5301275L
4R	14	35	0.5	100	14	14R0.53514100L
4R	14	35	1	100	14	14R13514100L
4R	16	40	0.5	100	16	16R0.54016100L
4R	16	40	1	100	16	16R14016100L
4R	16	40	1.5	100	16	16R1.54016100L
4R	16	40	2	100	16	16R24016100L
4R	16	40	3	100	16	16R34016100L
4R	16	40	5	100	16	16R54016100L
4R	20	50	1	100	20	20R15020100L
4R	20	50	2	100	20	20R25020100L
4R	20	50	3	100	20	20R35020100L
4R	1	3	0.2	75	4	1R0.23475L
4R	2	6	0.2	75	4	2R0.26475L
4R	2	6	0.5	75	4	2R0.56475L
4R	3	9	0.2	75	4	3R0.29475L
4R	3	9	0.3	75	4	3R0.39475L
4R	3	9	0.5	75	4	3R0.59475L
4R	3	9	1	75	4	3R19475L
4R	4	10	0.2	75	4	4R0.210475L
4R	4	10	0.3	75	4	4R0.310475L
4R	4	10	0.5	75	4	4R0.510475L
4R	4	10	0.5	100	4	4R0.5104100L
4R	4	10	0.5	75	6	4R0.510675L
4R	4	10	1	75	4	4R110475L
4R	4	10	1	100	4	4R1104100L
4R	5	13	0.2	75	6	5R0.213675L
4R	5	13	0.5	75	5	5R0.513575L
4R	5	13	0.5	75	6	5R0.513675L
4R	5	13	0.5	100	5	5R0.5135100L
4R	5	13	0.5	100	6	5R0.5136100L
4R	5	13	1	75	5	5R113575L
4R	5	13	1	75	6	5R113675L
4R	5	13	1	100	6	5R1136100L
4R	6	15	0.2	75	6	6R0.215675L
4R	6	15	0.2	100	6	6R0.2156100L
4R	6	15	0.5	75	6	6R0.515675L
4R	6	15	0.5	100	6	6R0.5156100L
4R	6	15	1	75	6	6R115675L
4R	6	15	1	100	6	6R1156100L
4R	6	15	2	100	6	6R2156100L
4R	8	20	0.2	75	8	8R0.220875L
4R	8	20	0.2	100	8	8R0.2208100L
4R	8	20	0.5	75	8	8R0.520875L
4R	8	20	0.5	100	8	8R0.5208100L
4R	8	20	0.5	150	8	8R0.5208150L
4R	8	20	1	75	8	8R120875L
4R	8	20	1	100	8	8R1208100L
4R	8	20	1.5	75	8	8R1.520875L
4R	8	20	1.5	100	8	8R1.5208100L
4R	8	20	2	75	8	8R220875L
4R	8	20	2	100	8	8R2208100L
4R	10	25	0.2	100	10	10R0.22510100L
4R	10	25	0.5	100	10	10R0.52510100L
4R	10	40	0.5	150	10	10R0.54010150L
4R	10	25	1	100	10	10R12510100L
4R	10	40	1	150	10	10R14010150L
4R	10	25	1.5	100	10	10R1.52510100L
4R	10	25	2	100	10	10R22510100L
4R	10	25	3	100	10	10R32510100L
4R	12	30	0.2	100	12	12R0.23012100L
4R	12	30	0.3	100	12	12R0.33012100L
4R	12	30	0.5	100	12	12R0.53012100L
4R	12	48	0.5	150	12	12R0.54812150L
4R	12	30	1	100	12	12R13012100L
4R	12	48	1	150	12	12R14812150L
4R	12	30	1.5	100	12	12R1.53012100L
4R	12	30	2	100	12	12R23012100L
4R	12	30	3	100	12	12R33012100L
4R	12	30	4	100	12	12R43012100L
4R	16	50	1	150	16	16R15016150L
4R	16	50	2	150	16	16R25016150L

Long Neck End Mill Application Cases

50% Shorter Machining Time in Deep Mold Cavity Machining

Customer Background

An automotive mold manufacturer produces deep injection molds for instrument panels.

Challenge

Material: Pre-hardened Mold Steel P20
Hardness: HRC 32-36
Machining Type: Deep Cavity
Cavity Depth: 65mm
Requirement: High dimensional accuracy & Smooth surface quality & High machining efficiency

Solution

Tool Used: 4-Flute Long Neck Corner Radius End Mills
Diameter: 6mm
Neck Length: 60mm
Spindle Speed: 18000 RPM
Feed Rate: 1200 mm/min

Result

Reduced machining time by 50%.
Improved surface finish from Ra 1.8 μm to Ra 0.7 μm.
Extended tool life by 50%.

Send Inquiry Now

How JINOO Manufactures Long Neck End Mills?

High-accuracy Equipment

Equipped with leading CNC grinding machines, JINOO can produce high-precision long neck end mills delivering consistent quality.
1. WALTER Helitronic Power 400L
2. WALTER Helitronic Vision 400L
3. WALTER Helitronic Micro 400L
4. Rollomatic NP5
5. ANCA MX5
6. ANCA MX7
Get instant Quote
Equipped with leading CNC grinding machines, JINOO can produce high-precision long neck end mills delivering consistent quality.
1. WALTER Helitronic Power 400L
2. WALTER Helitronic Vision 400L
3. WALTER Helitronic Micro 400L
4. Rollomatic NP5
5. ANCA MX5
6. ANCA MX7
Get instant Quote
Equipped with leading CNC grinding machines, JINOO can produce high-precision long neck end mills delivering consistent quality.
1. WALTER Helitronic Power 400L
2. WALTER Helitronic Vision 400L
3. WALTER Helitronic Micro 400L
4. Rollomatic NP5
5. ANCA MX5
6. ANCA MX7
Get instant Quote
Equipped with leading CNC grinding machines, JINOO can produce high-precision long neck end mills delivering consistent quality.
1. WALTER Helitronic Power 400L
2. WALTER Helitronic Vision 400L
3. WALTER Helitronic Micro 400L
4. Rollomatic NP5
5. ANCA MX5
6. ANCA MX7
Get instant Quote
Equipped with leading CNC grinding machines, JINOO can produce high-precision long neck end mills delivering consistent quality.
1. WALTER Helitronic Power 400L
2. WALTER Helitronic Vision 400L
3. WALTER Helitronic Micro 400L
4. Rollomatic NP5
5. ANCA MX5
6. ANCA MX7
Get instant Quote
Equipped with leading CNC grinding machines, JINOO can produce high-precision long neck end mills delivering consistent quality.
1. WALTER Helitronic Power 400L
2. WALTER Helitronic Vision 400L
3. WALTER Helitronic Micro 400L
4. Rollomatic NP5
5. ANCA MX5
6. ANCA MX7
Get instant Quote

Comprehensive Inspection System

Through multi-professional inspection, we can ensure every long neck end mill offers reliable quality, stable performance, and consistent machining results.
1. Zoller G3: Used for inspecting tool dimensions, geometry, and profile accuracy.
2. PG1000: Used for inspecting cutting edge, coating quality, and edge preparation.
3. Parlec: Used for inspecting tool runout, concentricity, and dimensional tolerance.
Get instant Quote
Through multi-professional inspection, we can ensure every long neck end mill offers reliable quality, stable performance, and consistent machining results.
1. Zoller G3: Used for inspecting tool dimensions, geometry, and profile accuracy.
2. PG1000: Used for inspecting cutting edge, coating quality, and edge preparation.
3. Parlec: Used for inspecting tool runout, concentricity, and dimensional tolerance.
Get instant Quote
Through multi-professional inspection, we can ensure every long neck end mill offers reliable quality, stable performance, and consistent machining results.
1. Zoller G3: Used for inspecting tool dimensions, geometry, and profile accuracy.
2. PG1000: Used for inspecting cutting edge, coating quality, and edge preparation.
3. Parlec: Used for inspecting tool runout, concentricity, and dimensional tolerance.
Get instant Quote

High-performance Carbide Rods

1. High-quality carbide rods from GESAC, Kennametal, Sandvik, Gühring, and CB Ceratizit.
2. Featuring ultra-fine grain, even cobalt distribution, and excellent wear resistance.
3. Stable performance in high-speed machining and machining of difficult materials.
4. Ensuring the cobalt content is maintained at 10%–12%.
Get instant Quote

JINOO Virgin Carbide vs Recycled Carbide

JINOO virgin carbide used in long neck end mills:
- Fine and even grains
- Consistent cobalt distribution
- Free from pores or impurities
- Structure with high density
- Excellent hardness and toughness
- Long tool life with superior wear resistance
Competitor’s Inferior Recycled Carbide:
- Irregular grain distribution
- Inconsistent cobalt content
- Many pores and impurities
- Loose structure and low density
- Easy edge chipping
- Reduced tool life and unstable performance
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Advanced Coatings Solutions

1. Advanced nano coatings from Oerlikon Balzers.
2. Different coating solutions for steel, stainless steel, aluminum, and hardened material.
3. Offering excellent heat resistance, wear resistance, and oxidation resistance.
4. Stable cutting, reduced friction, and improved chip removal in CNC machining.
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Premium Coatings vs Inferior Coatings

JINOO premium coatings used in long neck end mills
- Excellent coating adhesion
- No peeling or flaking in scratch testing
- Consistent thickness with stable tolerance
- Dense structure without pores or impurities
- Fine and smooth surface finish
Competitor’s inferior coatings used in low-grade end mills
- Weak adhesion and easily peeling
- Uneven coating thickness
- Loose structure with defects
- Rough surface and unstable performance
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Certified Quality & Global Recognition

These certifications show our comprehensive capability in quality management, technical innovation, and customer service.
1. ISO9001:2008 Certified
2. ISO9001:2015 Certified
3. SGS Qualified Manufacturer
4. TÜV Rheinland Qualified Manufacturer
5. Alibaba.com Verified Supplier
6. Made-in-China Verified Supplier
7. 1688 platform Verified Supplier
8. National High-tech Enterprise
9. Changzhou High-tech Product Certification
Get instant Quote
These certifications show our comprehensive capability in quality management, technical innovation, and customer service.
1. ISO9001:2008 Certified
2. ISO9001:2015 Certified
3. SGS Qualified Manufacturer
4. TÜV Rheinland Qualified Manufacturer
5. Alibaba.com Verified Supplier
6. Made-in-China Verified Supplier
7. 1688 platform Verified Supplier
8. National High-tech Enterprise
9. Changzhou High-tech Product Certification
Get instant Quote
These certifications show our comprehensive capability in quality management, technical innovation, and customer service.
1. ISO9001:2008 Certified
2. ISO9001:2015 Certified
3. SGS Qualified Manufacturer
4. TÜV Rheinland Qualified Manufacturer
5. Alibaba.com Verified Supplier
6. Made-in-China Verified Supplier
7. 1688 platform Verified Supplier
8. National High-tech Enterprise
9. Changzhou High-tech Product Certification
Get instant Quote
These certifications show our comprehensive capability in quality management, technical innovation, and customer service.
1. ISO9001:2008 Certified
2. ISO9001:2015 Certified
3. SGS Qualified Manufacturer
4. TÜV Rheinland Qualified Manufacturer
5. Alibaba.com Verified Supplier
6. Made-in-China Verified Supplier
7. 1688 platform Verified Supplier
8. National High-tech Enterprise
9. Changzhou High-tech Product Certification
Get instant Quote
These certifications show our comprehensive capability in quality management, technical innovation, and customer service.
1. ISO9001:2008 Certified
2. ISO9001:2015 Certified
3. SGS Qualified Manufacturer
4. TÜV Rheinland Qualified Manufacturer
5. Alibaba.com Verified Supplier
6. Made-in-China Verified Supplier
7. 1688 platform Verified Supplier
8. National High-tech Enterprise
9. Changzhou High-tech Product Certification
Get instant Quote
These certifications show our comprehensive capability in quality management, technical innovation, and customer service.
1. ISO9001:2008 Certified
2. ISO9001:2015 Certified
3. SGS Qualified Manufacturer
4. TÜV Rheinland Qualified Manufacturer
5. Alibaba.com Verified Supplier
6. Made-in-China Verified Supplier
7. 1688 platform Verified Supplier
8. National High-tech Enterprise
9. Changzhou High-tech Product Certification
Get instant Quote
These certifications show our comprehensive capability in quality management, technical innovation, and customer service.
1. ISO9001:2008 Certified
2. ISO9001:2015 Certified
3. SGS Qualified Manufacturer
4. TÜV Rheinland Qualified Manufacturer
5. Alibaba.com Verified Supplier
6. Made-in-China Verified Supplier
7. 1688 platform Verified Supplier
8. National High-tech Enterprise
9. Changzhou High-tech Product Certification
Get instant Quote
These certifications show our comprehensive capability in quality management, technical innovation, and customer service.
1. ISO9001:2008 Certified
2. ISO9001:2015 Certified
3. SGS Qualified Manufacturer
4. TÜV Rheinland Qualified Manufacturer
5. Alibaba.com Verified Supplier
6. Made-in-China Verified Supplier
7. 1688 platform Verified Supplier
8. National High-tech Enterprise
9. Changzhou High-tech Product Certification
Get instant Quote
These certifications show our comprehensive capability in quality management, technical innovation, and customer service.
1. ISO9001:2008 Certified
2. ISO9001:2015 Certified
3. SGS Qualified Manufacturer
4. TÜV Rheinland Qualified Manufacturer
5. Alibaba.com Verified Supplier
6. Made-in-China Verified Supplier
7. 1688 platform Verified Supplier
8. National High-tech Enterprise
9. Changzhou High-tech Product Certification
Get instant Quote

Professional After-sales Support

1. Tool selection based on your workpiece materials and cutting conditions.
2. Professional cutting parameter optimization.
3. Reliable regrinding and resharpening service: Regrinding up to 3 times can reduce costs by 38%.
4. All long neck end mills are manufactured and supplied directly from our own factory.
Get instant Quote

Testimonials

“With JINOO long neck end mills, we achieve stable cutting performance in mold steel machining. Compared with the end mills we used before, JINOO long neck end mills deliver reduced vibration, consistent chip evacuation, and tool life increased by 24%. Our production costs have been saved, and product quality has improved. We recommend using JINOO long neck end mills for steel processing.”
David Chen
CNC Machining Manager

Company & Service

Does JINOO provide customized services for long neck end mills?

Yes. JINOO offers customized services for long neck end mills.

Our customization services include:

Tool Specification Customization

You can customize tool diameter, flute length, overall length, neck length, helix angle, coating type, and shank diameter.

Geometry Optimization for Different Applications

We can optimize tool geometry based on different applications, including roughing, semi-finishing, slotting, and finishing.

Engineering Technical Support

Our engineering team can provide processing recommendations, testing support, and optimization plans to ensure the customized long neck end mills suit your demands.

What is your MOQ and lead time?

About MOQ:

For standard long neck end mills, we have a minimum order quantity of only 1 piece.
For customized milling tools, the MOQ depends on the specific tool design.

About Lead Time:

Standard long neck end mills are delivered within 5-12 working days.
For customized long neck end mills, we will provide a clear lead time after confirming the design.

Does JINOO provide long neck end mill samples?

Yes! We can provide paid samples for testing.

Sample testing can help you verify:

Cutting performance in actual CNC machining.
Machining stability and surface finish.
Tool life.

Additionally, our engineering team can provide testing plans and machining recommendations based on your workpiece materials.

What shipment and payment methods are available?

Shipping Methods:

Air freight and sea freight are available.
We cooperate with international logistics companies, including FedEx, DHL, and UPS.
All long neck end mills are protected by shockproof and waterproof packaging.

Payment Methods:

We support bank transfer, credit cards, and PayPal.
Additionally, we can also adjust the payment terms through consultation.

What is a long neck end mill used for?

Long neck end mills are primarily used to machine deep cavities, blind slots, narrow pockets, and hard-to-reach areas.

Main applications include:

Deep Cavity Machining
Mold & Die
Aerospace and Automotive Components
High-Aspect-Ratio Milling

The cutting depth of long neck end mills is often deeper than standard milling tools. They are widely used in the mold, aerospace, and automotive industries. Unlike rough end mills, which aim to achieve a higher material removal rate, long neck end mills prioritize stability, chip evacuation, and rigidity.

What is the difference between long neck end mills and standard end mills?

The main difference between long neck end mills and standard end mills lies in their application and geometric design.

Machining Applications

Long Neck End Mills:

Suitable for long overhang machining.
Used for deep cavity and narrow pocket machining.
Reduce interference in deep machining.

Standard End Mills:

Suitable for general milling.
Used for shallow pocket machining, profiling, slotting, and side milling.
Wide application.

Geometry Design

Rigidity Design

Long neck end mills maintain stability in long overhang machining by optimizing reinforced core structures.
Standard end mills depend on short overhangs for rigidity.

Vibration Control

Long neck end mills use variable helix angles and unequal pitch design to reduce vibration and improve surface quality.
Standard end mills feature fixed helix angles and can result in vibration.

Core Diameter

Long neck end mills should maintain hardness during extended-overhang machining; they feature a reinforced core diameter. A larger core diameter can reduce tool bending in deep cavity machining.
Standard end mills have large chip removal spaces, so their core diameters are small.

In conclusion, long neck end mills are specifically designed for deep-aspect-ratio milling. High rigidity is more important than large chip space. In contrast, standard end mills achieve balanced performance in multiple applications.

How to extend the life of long neck end mills?

You can improve the life of long neck end mills through the following suggestions:

Set appropriate cutting parameters: Avoid high feed rates and excessively deep cutting depths.
Choose suitable coatings: Different materials need different coatings. Heat-resistant coatings are suitable for steel machining. Anti-adhesion coatings are suitable for aluminum machining.
Decrease the overhang length to reduce vibration.
Ensure smooth chip evacuation and good cooling conditions.
Consider advanced toolpaths such as ramping to reduce tool load and improve stability.
Pay attention to wear conditions and regrind long neck end mills in time.

Extending tool life lies in optimizing machining parameters, cutting tools, and machine tools. In fact, tool failure often results from the combined effects of impact, vibration, and heat.

Can long neck end mills be used for roughing and finishing?

Yes! In many applications, JINOO long neck end mills can achieve both roughing and finishing. However, the specific applications are different for various types of materials.

For steel machining, 3-flute long neck end mills with variable helix angles and reinforced core structure can maintain a high material removal rate and improved surface finish. For high-precision applications, you had better choose high-accuracy milling tools.
For aluminum machining, 2-flute long neck end mills with DLC coatings can achieve a superior surface finish. DLC coatings and polished chip flutes can reduce friction and anti-adhesion.
For stainless steel, which is easily hardened and built up, we recommend separate roughing and finishing.
For hardened materials, JINOO long neck end mills can be used for semi-finishing. Because the tolerance of our milling tools can be up to h6.

Contact our sales team or sign in to find out about all your pricing options.

Contact Sales Support

ABOUT US

Since 2006, JINOO Tools Group has specialized in manufacturing solid carbide long neck end mills. As a National High-Tech Enterprise, we have two independent factories of over 35000 square meters, providing reliable management of stable quality and precision milling tools.

Supported by an experienced engineering team, we keep innovating technology to satisfy global demands. Our milling cutters are widely used in automotive, aerospace, and medical industries. Now, we have over 50 patents and have passed ISO 9001 certification. JINOO always tries our best to offer high-performance cutting solutions.