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End Mill for Hardened Steel 2 Flute Ball Nose Long Neck End Mill

SAMHO 2-Flute Long Neck Ball Nose End Mill — The Ultimate Tool for Precision Machining of Hardened Steel

Don’t let the challenges of machining hardened steel reduce your efficiency and profits. The SAMHO 2-flute long-neck ballnose end mill is engineered for precision CNC cutting of hardened steel and other high-hardness materials. Its advanced high-adhesion coating has been proven in real-world applications to deliver excellent durability and stable accuracy during continuous cutting.

Applicable Materials: Designed for hardened steel and high-hardness alloy parts.

Extreme Durability: Combines cutting-edge coating technology with a high-strength carbide substrate. The cutting edge remains sharp and stable, even under high-speed and high-temperature machining conditions.

Precision Machining Performance: The precision hemispherical tip is ideal for high-precision 3D contour machining, mold cavities, and internal corner transition areas.

In the field of hardened steel machining, tool performance demands are exceptionally high, requiring not only precise cutting but also outstanding durability. SAMHO’s specially coated 2-flute long neck ball end mill (R0.1–R2 mm) meets these strict requirements. It is engineered for CNC machining of high-hardness materials, such as hardened steel, providing operators with efficient, stable, and reliable cutting performance.

Advanced Technical Features

High-Adhesion Coating for Ultra-Long Tool Life
Our proprietary diamond-composite coating gives the tool exceptional hardness and chemical inertness:

Wear Resistance: The cutting edge stays sharp during prolonged dry or wet cutting operations.
Micro-Chipping Prevention: The coating firmly adheres to the carbide substrate, even under high-speed friction and elevated temperatures.

Ball-Nose Geometry for 3D Profiling of Hardened Steels
The precision hemispherical tip makes this 2-flute long neck ball nose end mill ideal for machining complex mold cavities, internal corner transitions, and 3D contours in hardened steels:

High-Precision Surface Machining: Achieves accurate contouring while maintaining a smooth surface finish.
Stable Machining Performance: Handles high-hardness materials reliably, preventing surface defects from cutting heat or tool vibration.

High-Efficiency Dual-Flute “Cool-Cutting” Design
The sharp dual-flute geometry reduces cutting heat and optimizes chip evacuation:

Maximized Chip Evacuation: Quickly removes metal chips, reducing the risk of clogging.
Reduced Cutting Load: Minimizes heat build-up, prevents cracking in brittle materials, and extends tool life.

Ultra-Fine Grain Carbide Substrate with High-Precision Grinding
Made from high-strength, ultra-fine grain carbide and precision-ground for excellent repeatability and dimensional accuracy:

Strict Dimensional Tolerances: Controlled within ±0.01 mm to ensure consistency across batches.
Superior Fracture Resistance: Enhances durability, ideal for machining hardened steels and other high-hardness materials.

Target Applications & Industries

This series of 2-flute long neck ball nose end mills is ideal for:

Machining complex contours on high-hardness, hardened steel parts
3D precision cutting of mold cavities and deep cavities
Internal corner and complex 3D surface machining
Surface finishing of high-precision components

Why Choose SAMHO as Your Wholesale Partner?

OEM/ODM Customization: Supports tailored designs and markings to meet specific customer requirements.

High-Precision Shank: Tolerances of 0–0.003 mm ensure stable clamping and consistent CNC machining performance.

Superior Tool Performance: Designed for CNC machining of high-hardness hardened steel. Wear-resistant, durable, and precise.

Fast Delivery & Global Supply: Supports large-scale production and international projects.

Recommended Materials for Machining (Highly Recommended: ⭐️ | Recommended: ⭕️ | Suggested: ◯)

Category	Work Material	Grade
DIE STEEL	Carbon steels (S45C/S55C)
	Alloy steels (SK/SCM/SUS)
	Prehardened steels (NAK/HPM)
	Hardened steels (~55/~60/~70HRC)	⭐️
SPECIAL MATERIAL	Aluminum alloys
	Graphite
	Copper
	Plastics
	Carbon fiber
	Titanium alloys
	Heat resistant alloys
	Cemented carbide
	Hard brittle (non-metallic) material

Total 77 models

Model Number	Outside Diameter	Length Of Cut	Effective Length	Shank Taper Angle	Overall Length	Number Of Flutes	Shank Diameter	In Stock
SHHLR2-002005	R0.1	0.2	0.5	12°	50	2	4	○
SHHLR2-002010	R0.1	0.2	1	12°	50	2	4	○
SHHLR2-002015	R0.1	0.2	1.5	12°	50	2	4	○
SHHLR2-003010	R0.15	0.3	1	12°	50	2	4	○
SHHLR2-003015	R0.15	0.3	1.5	12°	50	2	4	○
SHHLR2-003020	R0.15	0.3	2	12°	50	2	4	○
SHHLR2-003030	R0.15	0.3	3	12°	50	2	4	○
SHHLR2-004010	R0.2	0.4	1	12°	50	2	4	○
SHHLR2-004020	R0.2	0.4	2	12°	50	2	4	○
SHHLR2-004030	R0.2	0.4	3	12°	50	2	4	○
SHHLR2-004040	R0.2	0.4	4	12°	50	2	4	○
SHHLR2-005010	R0.25	0.5	1	12°	50	2	4	○
SHHLR2-005020	R0.25	0.5	2	12°	50	2	4	○
SHHLR2-005040	R0.25	0.5	4	12°	50	2	4	○
SHHLR2-005060	R0.25	0.5	6	12°	50	2	4	○
SHHLR2-005080	R0.25	0.5	8	12°	50	2	4	○
SHHLR2-006020	R0.3	0.6	2	12°	50	2	4	○
SHHLR2-006040	R0.3	0.6	4	12°	50	2	4	○
SHHLR2-006060	R0.3	0.6	6	12°	50	2	4	○
SHHLR2-006080	R0.3	0.6	8	12°	50	2	4	○
SHHLR2-008020	R0.4	0.8	2	12°	50	2	4	○
SHHLR2-008040	R0.4	0.8	4	12°	50	2	4	○
SHHLR2-008060	R0.4	0.8	6	12°	50	2	4	○
SHHLR2-008080	R0.4	0.8	8	12°	50	2	4	○
SHHLR2-009020	R0.45	0.9	2	12°	50	2	4	○
SHHLR2-009040	R0.45	0.9	4	12°	50	2	4	○
SHHLR2-009060	R0.45	0.9	6	12°	50	2	4	○
SHHLR2-009080	R0.45	0.9	8	12°	50	2	4	○
SHHLR2-010020	R0.5	1	2	12°	50	2	4	○
SHHLR2-010040	R0.5	1	4	12°	50	2	4	○
SHHLR2-010060	R0.5	1	6	12°	50	2	4	○
SHHLR2-010080	R0.5	1	8	12°	50	2	4	○
SHHLR2-010100	R0.5	1	10	12°	50	2	4	○
SHHLR2-010120	R0.5	1	12	12°	50	2	4	○
SHHLR2-010140	R0.5	1	14	12°	50	2	4	○
SHHLR2-010160	R0.5	1	16	12°	50	2	4	○
SHHLR2-015040	R0.75	1.5	4	12°	50	2	4	○
SHHLR2-015060	R0.75	1.5	6	12°	50	2	4	○
SHHLR2-015080	R0.75	1.5	8	12°	50	2	4	○
SHHLR2-015100	R0.75	1.5	10	12°	50	2	4	○
SHHLR2-015120	R0.75	1.5	12	12°	50	2	4	○
SHHLR2-015140	R0.75	1.5	14	12°	50	2	4	○
SHHLR2-015160	R0.75	1.5	16	12°	50	2	4	○
SHHLR2-020040	R1	2	4	12°	50	2	4	○
SHHLR2-020060	R1	2	6	12°	50	2	4	○
SHHLR2-020080	R1	2	8	12°	50	2	4	○
SHHLR2-020100	R1	2	10	12°	50	2	4	○
SHHLR2-020120	R1	2	12	12°	50	2	4	○
SHHLR2-020160	R1	2	16	12°	50	2	4	○
SHHLR2-020040-6	R1	2	4	12°	60	2	6	○
SHHLR2-020060-6	R1	2	6	12°	60	2	6	○
SHHLR2-020080-6	R1	2	8	12°	60	2	6	○
SHHLR2-020100-6	R1	2	10	12°	60	2	6	○
SHHLR2-020120-6	R1	2	12	12°	60	2	6	○
SHHLR2-020160-6	R1	2	16	12°	60	2	6	○
SHHLR2-030060	R1.5	3	6	12°	50	2	4	○
SHHLR2-030080	R1.5	3	8	12°	50	2	4	○
SHHLR2-030100	R1.5	3	10	12°	50	2	4	○
SHHLR2-030120	R1.5	3	12	12°	50	2	4	○
SHHLR2-030160	R1.5	3	16	12°	50	2	4	○
SHHLR2-030200	R1.5	3	20	12°	50	2	4	○
SHHLR2-030060-6	R1.5	3	6	12°	60	2	6	○
SHHLR2-030080-6	R1.5	3	8	12°	60	2	6	○
SHHLR2-030100-6	R1.5	3	10	12°	60	2	6	○
SHHLR2-030120-6	R1.5	3	12	12°	60	2	6	○
SHHLR2-030160-6	R1.5	3	16	12°	60	2	6	○
SHHLR2-030200-6	R1.5	3	20	12°	60	2	6	○
SHHLR2-040080	R2	4	8	–	50	2	4	○
SHHLR2-040100	R2	4	10	–	50	2	4	○
SHHLR2-040120	R2	4	12	–	50	2	4	○
SHHLR2-040160	R2	4	16	–	50	2	4	○
SHHLR2-040200	R2	4	20	–	50	2	4	○
SHHLR2-040080-6	R2	4	8	12°	60	2	6	○
SHHLR2-040100-6	R2	4	10	12°	60	2	6	○
SHHLR2-040120-6	R2	4	12	12°	60	2	6	○
SHHLR2-040160-6	R2	4	16	12°	60	2	6	○
SHHLR2-040200-6	R2	4	20	12°	60	2	6	○

Contour Milling Parameters

Work Material		HRC48-55 hardened steel				HRC56-62 hardened steel				HRC63-70 hardened steel
Radius	Effective Length(mm)	(min-1) Speed	(mm/min) Feed	(mm) Axial depth	(mm) Radidl depth	(min-1) Speed	(mm/min) Feed	(mm) Axial depth	(mm) Radidl depth	(min-1) Speed	(mm/min) Feed	(mm) Axial depth	(mm) Radidl depth
R0.1	0.5	40000	300	0.01	0.01	40000	280	0.005	0.005	40000	200	0.003	0.003
R0.1	1	40000	250	0.003	0.005	40000	160	0.003	0.005	40000	120	0.003	0.003
R0.1	1.5	40000	150	0.003	0.005	40000	120	0.003	0.003	40000	80	0.002	0.002
R0.15	1	40000	350	0.01	0.015	40000	280	0.005	0.01	40000	200	0.003	0.007
R0.15	1.5	40000	250	0.003	0.005	40000	160	0.003	0.005	40000	120	0.003	0.005
R0.15	2	40000	150	0.003	0.005	40000	120	0.003	0.003	40000	80	0.002	0.002
R0.15	3	40000	100	0.002	0.003	40000	100	0.002	0.003	40000	80	0.002	0.002
R0.2	1	40000	600	0.02	0.05	40000	500	0.02	0.03	40000	400	0.01	0.02
R0.2	2	40000	500	0.02	0.03	40000	500	0.01	0.02	40000	300	0.005	0.01
R0.2	2	35000	300	0.008	0.02	33000	300	0.008	0.015	30000	200	0.005	0.007
R0.2	4	35000	250	0.005	0.01	30000	200	0.005	0.01	25000	150	0.003	0.005
R0.25	1	40000	800	0.02	0.05	36000	700	0.02	0.03	30000	400	0.01	0.02
R0.25	2	40000	800	0.02	0.05	36000	700	0.02	0.03	30000	400	0.01	0.02
R0.25	4	32000	400	0.01	0.02	30000	400	0.01	0.02	24000	200	0.005	0.01
R0.25	6	25000	350	0.005	0.01	24000	250	0.005	0.01	20000	160	0.003	0.005
R0.25	8	25000	150	0.002	0.003	24000	100	0.002	0.002	20000	80	0.001	0.002
R0.3	2	40000	1200	0.03	0.08	36000	1000	0.02	0.08	25000	600	0.02	0.08
R0.3	4	40000	800	0.02	0.05	32000	800	0.02	0.05	25000	400	0.01	0.03
R0.3	6	30000	500	0.01	0.02	26000	400	0.01	0.02	20000	300	0.005	0.01
R0.3	8	25000	300	0.005	0.005	20000	300	0.005	0.005	16000	200	0.003	0.003
R0.4	2	35000	1400	0.04	0.1	30000	1400	0.03	0.08	20000	700	0.02	0.08
R0.4	4	35000	1400	0.04	0.1	30000	1400	0.03	0.08	20000	700	0.02	0.08
R0.4	6	28000	1000	0.02	0.05	25000	800	0.02	0.03	18000	500	0.01	0.02
R0.4	8	22000	700	0.01	0.03	20000	600	0.01	0.02	14000	300	0.005	0.01
R0.45	2	35000	1400	0.04	0.1	30000	1400	0.03	0.08	20000	700	0.02	0.08
R0.45	4	35000	1400	0.04	0.1	30000	1400	0.03	0.08	20000	700	0.02	0.08
R0.45	6	28000	1000	0.02	0.05	25000	800	0.02	0.03	18000	500	0.01	0.02
R0.45	8	22000	700	0.01	0.03	20000	600	0.01	0.02	14000	300	0.005	0.01
R0.5	2	30000	1600	0.08	0.3	24000	1600	0.08	0.3	18000	1000	0.05	0.15
R0.5	4	30000	1600	0.08	0.2	24000	1600	0.06	0.2	18000	800	0.03	0.13
R0.5	6	30000	1200	0.05	0.1	22000	1000	0.03	0.1	18000	600	0.02	0.05
R0.5	8	24000	800	0.02	0.08	18000	500	0.01	0.08	15000	400	0.01	0.03
R0.5	10	22000	600	0.015	0.05	16000	400	0.01	0.05	15000	300	0.01	0.02
R0.5	12	20000	600	0.01	0.03	16000	400	0.01	0.03	15000	300	0.005	0.01
R0.5	14	20000	400	0.005	0.01	16000	300	0.005	0.01	15000	200	0.003	0.005
R0.5	16	18000	300	0.005	0.005	16000	200	0.005	0.005	14000	150	0.002	0.002
R0.75	4	30000	2000	0.1	0.3	24000	2000	0.1	0.2	18000	1200	0.06	0.15
R0.75	6	30000	2000	0.1	0.2	24000	2000	0.1	0.2	18000	1200	0.05	0.1
R0.75	8	24000	1400	0.1	0.15	20000	1000	0.05	0.08	16000	800	0.03	0.05
R0.75	10	24000	1400	0.1	0.1	20000	1000	0.05	0.05	16000	600	0.03	0.03
R0.75	12	20000	600	0.05	0.05	16000	400	0.03	0.05	15000	400	0.02	0.03
R0.75	14	20000	600	0.03	0.03	16000	400	0.02	0.02	15000	400	0.01	0.01
R0.75	16	20000	300	0.01	0.01	16000	200	0.005	0.005	14000	300	0.002	0.002
R1	4	24000	2600	0.15	0.4	22000	2400	0.15	0.3	18000	1400	0.1	0.2
R1	6	24000	2600	0.15	0.4	22000	2400	0.15	0.3	18000	1400	0.1	0.2
R1	8	20000	2400	0.1	0.3	18000	2400	0.1	0.2	16000	1400	0.07	0.15
R1	10	18000	1800	0.07	0.2	16000	1600	0.05	0.2	14000	1000	0.05	0.1
R1	12	16000	1600	0.05	0.15	14000	1400	0.05	0.1	12000	800	0.03	0.05
R1	16	16000	1600	0.05	0.1	14000	1400	0.05	0.05	12000	800	0.03	0.03
R1.5	6	20000	3000	0.2	0.5	18000	2600	0.2	0.4	14000	2000	0.15	0.3
R1.5	8	20000	3000	0.2	0.5	18000	2600	0.2	0.4	14000	2000	0.1	0.3
R1.5	10	20000	3000	0.2	0.5	18000	2600	0.15	0.3	14000	2000	0.07	0.2
R1.5	12	20000	3000	0.2	0.5	18000	2600	0.15	0.3	14000	2000	0.07	0.2
R1.5	16	18000	2400	0.1	0.4	16000	2000	0.1	0.3	12000	1600	0.05	0.1
R1.5	20	18000	2400	0.07	0.25	16000	2000	0.05	0.15	12000	1600	0.03	0.05
R2	8	16000	3000	0.2	1	14000	3000	0.2	0.8	12000	2600	0.2	0.6
R2	10	16000	3000	0.2	1	14000	3000	0.2	0.8	12000	2600	0.2	0.6
R2	12	16000	3000	0.2	1	14000	3000	0.2	0.8	12000	2600	0.2	0.6
R2	16	14000	2600	0.1	0.6	12000	2000	0.1	0.4	10000	2000	0.1	0.2
R2	20	14000	2600	0.07	0.4	12000	1200	0.05	0.3	10000	1600	0.03	0.1

Milling Amount for Side Milling(mm)

Work Material \ Length of Cut	2.5D (Length of Cut=Diameter*2.5)	4D (Length of Cut=Diameter*4)
45HRC以下Below 45HRC	ae=0.07Dap=2D	ae=0.07Dap=2D
45HRC以上Above 45HRC	ae=0.03Dap=1.5D	ae=0.03Dap=1.5D

D: Diameter (mm)

ap:AxialDepth (mm)

ae: Radial Depth (mm)

Note:

*Decrease both spindle speed and feed rate proportionally when the milling parameters exceed the machine’s maximum spindle speed;

*Recommend oil coolant for Stainless Steels and Heat Resistance Alloys;

*Recommend using a non-contact measuring device to avoid damaging the precisiontip point;

*Decrease both spindle speed and feed rate proportionally in case of chattering;

*When the material hardness is greater than HRC58 degrees, it is recommended to use air blow cooling for roughing andoil mistor air blow cooling for finishing.