Home - Products-Tool Holders Series-HSK40A HSK50A HSK63A HSK100A ER collet chuck

HSK40A HSK50A HSK63A HSK100A ER collet chuck

Balance to G6.3 15000rpm,G2.5 30000rpm.

Material: 20CrMnTi

HSK40A / HSK50A / HSK63A / HSK100A spindle interface
Compatible with ER collet systems for flexible tool holding
High precision and excellent concentricity
High rigidity for stable cutting performance
Suitable for high-speed CNC machining
Custom specifications and balancing grades available

Application: CNC machining centers, high-speed milling, precision drilling, mold processing, and general machining operations.

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HSK Type A tool holders are generally manufactured from alloy steel (40Cr / 20CrMnTi). After precision forging and CNC machining, they go through carburizing quenching & tempering heat treatment. The taper and flange contact surface hardness reaches HRC 58–62, while the main body core retains toughness at HRC 38–45. This combination delivers high surface hardness for wear resistance and good internal toughness to prevent cracking under heavy load and frequent automatic tool changes. The surface is commonly finished with black oxide or nitriding treatment to gain anti-corrosion property and reduce friction during tool clamping.

Order No	clamping range	L	L2	D	d1
HSK40AXER20-80	1-13	100	60	40	34
HSK40AXER25-80	1-16	100	60	40	42
HSK50AXER16-80	1-10	105	54	50	28
HSK50AXER16-100	1-10	125	74	50	28
HSK50AXER25-80	1-16	105	54	50	2
HSK50AXER25-100	1-16	125	74	50	42
HSK50AXER32-100	2-20	125	74	50	50
HSK50AXER32-120	2-20	145	94	50	50
HSK63AXER16-80	1-10	112	54	63	28
HSK63AXER16-100	1-10	132	74	63	28
HSK63AXER25-80	1-16	112	54	63	42
HSK63AXER25-100	1-16	132	74	63	42
HSK63AXER25-120	1-16	152	94	63	42
HSK63AXER32-80	2-20	112	54	63	50
HSK63AXER32-100	2-20	132	74	63	50
HSK63AXER32-120	2-20	152	94	63	50
HSK63AXER40-80	3-26	112	54	63	63
HSK63AXER40-100	3-26	132	74	63	63
HSK63AXER40-120	3-26	152	84	63	63
HSK100AXER25-100	1-16	150	71	100	42
HSK100AXER25-120	1-16	170	91	100	42
HSK100AXER32-100	2-20	150	71	100	50
HSK100AXER32-120	2-20	170	91	100	50
HSK100AXER40-100	3-26	150	71	100	63
HSK100AXER40-120	3-26	170	91	100	63

HSK40A HSK50A HSK63A HSK100A ER collet chuck

Features & Selling Points of HSK Type A Tool Holder

Dual contact design (taper + flange face), high rigidityDual contact between taper and flange ensures strong structural rigidity, minimal deformation under high speed and heavy cutting. Great for high-load machining.
Ultra-low runout & excellent concentricityPrecision ground taper surface, stable clamping accuracy. Ideal for high-precision milling, mold and aerospace component processing.
Superior dynamic balance for high-speed machiningHollow thin-wall structure, low rotational mass. Suitable for high spindle speed, widely applied in high-speed machining centers.
High repeat positioning accuracyConsistent precision after repeated tool changes, guarantees stable dimensional consistency for mass production.
Self-centering & quick clampingHSK short taper enables fast ATC tool change and reliable self-centering performance.
Compact structure, good accessibilityShort taper design reduces overall length, helps avoid interference in deep cavity and complex workpiece machining.
High transmission torqueLarge contact area delivers stable torque transmission, available for both light finishing and medium-heavy cutting.
Wide range of specificationsHSK32A / HSK40A / HSK50A / HSK63A / HSK80A / HSK100A available. Coolant-through version optional.