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hrc55 end mills 2 flute long neck ball nose end mill

SAMHO HRC55 Long Neck Ball Nose End Mills – SHBLR2 Series (R0.1–R2 mm)

Struggling with reach and interference in complex mold designs? The SAMHO SHBLR2 Series is your ultimate solution. Specifically engineered for deep cavity and 3D contour applications, these long-reach tools provide the perfect balance of flexibility and precision for materials up to 55HRC.

Extended Reach: Long neck design for deep pocket clearance and narrow groove access.

Ultra-Micro Precision: Sizes ranging from R0.1 mm up to R2.0 mm.

HB Nano-Coating: Superior wear resistance for stable machining under long overhang conditions.

Wholesale Direct: Sourced from China’s leading cutting tool manufacturer with unbeatable factory pricing.

In high-precision mold and die manufacturing, standard tools often lack the reach required for complex geometries. The SAMHO HRC55 2-Flute Long Neck Series is precision-ground using state-of-the-art CNC technology to deliver stable, high-accuracy performance even in long-overhang milling environments.

Key Technical Advantages

Specialized Long Neck Design for 3D Profiling
The “Long Neck, Short Flute” geometry is ideal for deep-cavity machining:
- Reach Narrow Areas: Avoids shank interference for complex 3D contours and molds
- Consistent Finish: Ensures high-quality surface integrity in deep-pocket milling
Solid Carbide & Advanced HB Coating
Crafted from high-density solid carbide with HB Series Nano-coating:
- High Red Hardness: Maintains sharp edges at elevated temperatures
- Enhanced Wear Performance: Extends tool life in abrasive alloy steels
- Hardness Rating: Optimized for pre-hardened and hardened steels up to HRC55
Precise Geometry for Superior Surface Finish
- 2-Flute Configuration: Maximizes chip evacuation and reduces chip welding in deep slots
- Micro-Tolerance Shank: Shank diameters controlled within 0 to +0.003 mm for perfect concentricity
- Customization: OEM 3-flute and 4-flute variants available for specific feed rates
Massive Model Selection (77 Models)
Covers neck lengths and radii from R0.1 mm to R2.0 mm, ensuring the exact specification for any CNC setup

Target Applications

Injection Mold & Die Making: Finishing deep cavities, mold cores, and complex ribs
Aerospace & Medical: Machining high-tolerance parts with intricate 3D features
Electrode Machining: Precision milling of copper and graphite electrodes

Pro-Tips for Long-Reach Machining

Vibration Control: Decrease spindle speed and feed rate for long-overhang conditions to avoid chatter
Coolant Strategy: Use oil coolant for stainless steel and heat-resistant alloys to improve lubricity and flush chips effectively
Tool Setup: Use high-precision tool holders to minimize runout, critical for micro-diameter tools (R0.1–0.5 mm)

Partner with SAMHO for Wholesale Excellence

Wholesale Pricing: Competitive factory-direct deals for global distributors
Fast Global Shipping: All 77 models in stock for rapid dispatch
OEM Support: Custom neck lengths and specialized coatings available upon request

Model Number	Cutting Diameter	Flute Length	Usable Length	Taper Angle	Overall Length (OAL)	Number of Flutes	Shank Diameter
SHBLR2-002005	R0.1	0.2	0.5	12°	50	2	4
SHBLR2-002010	R0.1	0.2	1	12°	50	2	4
SHBLR2-002015	R0.1	0.2	1.5	12°	50	2	4
SHBLR2-003010	R0.15	0.3	1	12°	50	2	4
SHBLR2-003015	R0.15	0.3	1.5	12°	50	2	4
SHBLR2-003020	R0.15	0.3	2	12°	50	2	4
SHBLR2-003030	R0.15	0.3	3	12°	50	2	4
SHBLR2-004010	R0.2	0.4	1	12°	50	2	4
SHBLR2-004020	R0.2	0.4	2	12°	50	2	4
SHBLR2-004030	R0.2	0.4	3	12°	50	2	4
SHBLR2-004040	R0.2	0.4	4	12°	50	2	4
SHBLR2-005010	R0.25	0.5	1	12°	50	2	4
SHBLR2-005020	R0.25	0.5	2	12°	50	2	4
SHBLR2-005040	R0.25	0.5	4	12°	50	2	4
SHBLR2-005060	R0.25	0.5	6	12°	50	2	4
SHBLR2-005080	R0.25	0.5	8	12°	50	2	4
SHBLR2-006020	R0.3	0.6	2	12°	50	2	4
SHBLR2-006040	R0.3	0.6	4	12°	50	2	4
SHBLR2-006060	R0.3	0.6	6	12°	50	2	4
SHBLR2-006080	R0.3	0.6	8	12°	50	2	4
SHBLR2-008020	R0.4	0.8	2	12°	50	2	4
SHBLR2-008040	R0.4	0.8	4	12°	50	2	4
SHBLR2-008060	R0.4	0.8	6	12°	50	2	4
SHBLR2-008080	R0.4	0.8	8	12°	50	2	4
SHBLR2-009020	R0.45	0.9	2	12°	50	2	4
SHBLR2-009040	R0.45	0.9	4	12°	50	2	4
SHBLR2-009060	R0.45	0.9	6	12°	50	2	4
SHBLR2-009080	R0.45	0.9	8	12°	50	2	4
SHBLR2-010020	R0.5	1	2	12°	50	2	4
SHBLR2-010040	R0.5	1	4	12°	50	2	4
SHBLR2-010060	R0.5	1	6	12°	50	2	4
SHBLR2-010080	R0.5	1	8	12°	50	2	4
SHBLR2-010100	R0.5	1	10	12°	50	2	4
SHBLR2-010120	R0.5	1	12	12°	50	2	4
SHBLR2-010140	R0.5	1	14	12°	50	2	4
SHBLR2-010160	R0.5	1	16	12°	50	2	4
SHBLR2-015040	R0.75	1.5	4	12°	50	2	4
SHBLR2-015060	R0.75	1.5	6	12°	50	2	4
SHBLR2-015080	R0.75	1.5	8	12°	50	2	4
SHBLR2-015100	R0.75	1.5	10	12°	50	2	4
SHBLR2-015120	R0.75	1.5	12	12°	50	2	4
SHBLR2-015140	R0.75	1.5	14	12°	50	2	4
SHBLR2-015160	R0.75	1.5	16	12°	50	2	4
SHBLR2-020040	R1	2	4	12°	50	2	4
SHBLR2-020060	R1	2	6	12°	50	2	4
SHBLR2-020080	R1	2	8	12°	50	2	4
SHBLR2-020100	R1	2	10	12°	50	2	4
SHBLR2-020120	R1	2	12	12°	50	2	4
SHBLR2-020160	R1	2	16	12°	50	2	4
SHBLR2-020040-6	R1	2	4	12°	60	2	6
SHBLR2-020060-6	R1	2	6	12°	60	2	6
SHBLR2-020080-6	R1	2	8	12°	60	2	6
SHBLR2-020100-6	R1	2	10	12°	60	2	6
SHBLR2-020120-6	R1	2	12	12°	60	2	6
SHBLR2-020140-6	R1	2	16	12°	60	2	6
SHBLR2-030060	R1.5	3	6	12°	50	2	4
SHBLR2-030080	R1.5	3	8	12°	50	2	4
SHBLR2-030100	R1.5	3	10	12°	50	2	4
SHBLR2-030120	R1.5	3	12	12°	50	2	4
SHBLR2-030160	R1.5	3	16	12°	50	2	4
SHBLR2-030200	R1.5	3	20	12°	50	2	4
SHBLR2-030060-6	R1.5	3	6	12°	60	2	6
SHBLR2-030080-6	R1.5	3	8	12°	60	2	6
SHBLR2-030100-6	R1.5	3	10	12°	60	2	6
SHBLR2-030120-6	R1.5	3	12	12°	60	2	6
SHBLR2-030160-6	R1.5	3	16	12°	60	2	6
SHBLR2-030200-6	R1.5	3	20	12°	60	2	6
SHBLR2-040080-6	R2	4	8	12°	60	2	6
SHBLR2-040100-6	R2	4	10	12°	60	2	6
SHBLR2-040120-6	R2	4	12	12°	60	2	6
SHBLR2-040160-6	R2	4	16	12°	60	2	6
SHBLR2-040200-6	R2	4	20	12°	60	2	6

Work Material		Copper / OFC / Tough Pitch Copper				HRC 30–45 Carbon Steel / Pre-Hardened Steel				HRC 45–55 Hardened Steel
Diameter (mm)	Length（mm)	Speed(min-1)	Feed(mm/min)	Ap (mm)	Ae (mm)	Speed(min-1)	Feed(mm/min)	Ap (mm)	Ae (mm)	Speed(min-1)	Feed(mm/min)	Ap (mm)	Ae (mm)
0.2	0.5	30000	150	0.006	0.006	30000	150	0.006	0.006	30000	120	0.006	0.006
0.2	1	30000	100	0.006	0.006	30000	100	0.006	0.006	30000	100	0.003	0.003
0.2	1.5	30000	100	0.003	0.003	30000	100	0.003	0.003	30000	100	0.003	0.003
0.3	1	28000	300	0.01	0.01	28000	300	0.01	0.01	26000	200	0.006	0.006
0.3	1.5	28000	300	0.008	0.008	28000	300	0.008	0.008	26000	200	0.004	0.004
0.3	2	24000	200	0.007	0.007	24000	200	0.007	0.007	24000	150	0.003	0.003
0.3	3	20000	100	0.005	0.005	20000	100	0.005	0.005	18000	100	0.003	0.003
0.4	1	24000	600	0.01	0.02	24000	600	0.01	0.02	20000	500	0.01	0.01
0.4	2	24000	400	0.01	0.015	24000	400	0.01	0.015	20000	400	0.008	0.01
0.4	3	20000	300	0.008	0.008	20000	300	0.008	0.008	18000	300	0.006	0.006
0.4	4	18000	150	0.005	0.005	18000	150	0.005	0.005	16000	150	0.003	0.003
0.5	1	22000	800	0.015	0.02	22000	800	0.015	0.02	20000	600	0.01	0.01
0.5	2	22000	800	0.015	0.02	22000	800	0.015	0.02	18000	600	0.01	0.01
0.5	4	18000	400	0.01	0.01	18000	400	0.01	0.01	16000	300	0.008	0.008
0.5	6	14000	200	0.005	0.005	14000	200	0.005	0.005	14000	150	0.008	0.008
0.5	8	14000	100	0.003	0.003	14000	100	0.003	0.003	14000	100	0.003	0.003
0.6	2	20000	1000	0.02	0.02	20000	1000	0.02	0.02	20000	800	0.02	0.02
0.6	4	17000	500	0.015	0.02	17000	500	0.015	0.02	15000	500	0.01	0.01
0.6	6	15000	400	0.01	0.02	15000	400	0.01	0.02	13000	300	0.008	0.008
0.6	8	14000	200	0.005	0.01	14000	200	0.005	0.01	13000	150	0.005	0.005
0.8	2	18000	1200	0.03	0.03	18000	1200	0.03	0.03	18000	1200	0.02	0.02
0.8	4	18000	800	0.02	0.03	18000	800	0.02	0.03	18000	800	0.02	0.02
0.8	6	14000	500	0.01	0.03	14000	500	0.01	0.03	16000	600	0.01	0.02
0.8	8	14000	300	0.01	0.02	14000	300	0.01	0.02	15000	400	0.005	0.01
0.9	2	17000	1400	0.03	0.04	17000	1400	0.03	0.04	17000	1300	0.02	0.03
0.9	4	17000	1200	0.03	0.04	17000	1200	0.03	0.04	17000	1000	0.02	0.03
0.9	6	15000	800	0.02	0.03	15000	800	0.02	0.03	13000	600	0.01	0.02
0.9	8	13000	500	0.01	0.03	13000	500	0.01	0.03	12000	400	0.01	0.02
1.0	2	16000	1500	0.03	0.05	16000	1500	0.03	0.05	14000	1200	0.02	0.03
1.0	4	16000	1300	0.03	0.05	16000	1300	0.03	0.05	14000	1000	0.02	0.03
1.0	6	16000	1000	0.03	0.05	16000	1000	0.03	0.05	14000	800	0.02	0.03
1.0	8	14000	500	0.02	0.04	14000	500	0.02	0.04	12000	500	0.01	0.02
1.0	10	12000	400	0.01	0.03	12000	400	0.01	0.03	12000	400	0.01	0.02
1.0	12	11000	300	0.01	0.02	11000	300	0.01	0.02	10000	300	0.01	0.02
1.0	14	10000	250	0.01	0.02	10000	250	0.01	0.02	10000	200	0.008	0.01
1.0	16	10000	200	0.01	0.01	10000	200	0.01	0.01	10000	200	0.005	0.01
1.5	4	16000	1600	0.03	0.06	16000	1600	0.03	0.06	16000	1400	0.02	0.04
1.5	6	16000	1400	0.03	0.06	16000	1400	0.03	0.06	14000	1200	0.02	0.04
1.5	8	16000	1200	0.03	0.05	16000	1200	0.03	0.05	13000	1000	0.02	0.04
1.5	10	12000	800	0.02	0.05	12000	800	0.02	0.05	12000	600	0.01	0.04
1.5	12	10000	500	0.02	0.04	10000	500	0.02	0.04	11000	500	0.01	0.04
1.5	14	10000	400	0.01	0.03	10000	400	0.01	0.03	10000	400	0.01	0.02
1.5	16	8000	300	0.01	0.03	8000	300	0.01	0.03	9000	300	0.01	0.01
2	4	16000	1800	0.03	0.06	16000	1800	0.03	0.06	16000	2000	0.03	0.06
2	6	15000	1800	0.03	0.06	15000	1800	0.03	0.06	14000	1800	0.03	0.06
2	8	15000	1800	0.03	0.06	15000	1800	0.03	0.06	14000	1800	0.03	0.06
2	10	15000	1800	0.03	0.06	15000	1800	0.03	0.06	14000	1800	0.03	0.06
2	12	13000	1600	0.03	0.06	13000	1600	0.03	0.06	12000	1400	0.02	0.06
2	16	10000	1000	0.02	0.06	10000	1000	0.02	0.06	10000	1000	0.02	0.06
2	4	16000	1800	0.03	0.06	16000	1800	0.03	0.06	16000	2000	0.03	0.06
2	6	15000	1800	0.03	0.06	15000	1800	0.03	0.06	14000	1800	0.03	0.06
2	8	15000	1800	0.03	0.06	15000	1800	0.03	0.06	14000	1800	0.03	0.06
2	10	15000	1800	0.03	0.06	15000	1800	0.03	0.06	14000	1800	0.03	0.06
2	12	13000	1600	0.03	0.06	13000	1600	0.03	0.06	12000	1400	0.02	0.06
2	16	10000	1000	0.02	0.06	10000	1000	0.02	0.06	10000	1000	0.02	0.06
3	6	14000	2200	0.05	0.07	14000	2200	0.05	0.07	13000	2200	0.03	0.07
3	8	14000	2200	0.05	0.07	14000	2200	0.05	0.07	13000	2200	0.03	0.07
3	10	14000	2200	0.05	0.07	14000	2200	0.05	0.07	13000	2200	0.03	0.07
3	12	14000	2200	0.04	0.07	14000	2200	0.04	0.07	13000	2200	0.03	0.07
3	16	12000	2000	0.03	0.07	12000	2000	0.03	0.07	11000	2000	0.03	0.07
3	20	11000	1000	0.03	0.07	11000	1000	0.03	0.07	10000	1000	0.02	0.07
3	6	14000	2200	0.05	0.07	14000	2200	0.05	0.07	13000	2200	0.03	0.07
3	8	14000	2200	0.05	0.07	14000	2200	0.05	0.07	13000	2200	0.03	0.07
3	10	14000	2200	0.05	0.07	14000	2200	0.05	0.07	13000	2200	0.03	0.07
3	12	14000	2200	0.04	0.07	14000	2200	0.04	0.07	13000	2200	0.03	0.07
3	16	12000	2000	0.03	0.07	12000	2000	0.03	0.07	11000	2000	0.03	0.07
3	20	11000	1000	0.03	0.07	11000	1000	0.03	0.07	10000	1000	0.02	0.07
4	8	14000	2400	0.05	0.07	14000	2400	0.05	0.07	12000	2200	0.03	0.07
4	10	14000	2400	0.05	0.07	14000	2400	0.05	0.07	12000	2200	0.03	0.07
4	12	14000	2400	0.05	0.07	14000	2400	0.05	0.07	12000	2200	0.03	0.07
4	16	14000	2200	0.04	0.07	14000	2200	0.04	0.07	12000	2200	0.03	0.07
4	20	12000	2000	0.04	0.07	12000	2000	0.04	0.07	11000	2000	0.03	0.07