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DIN69896/HSK Shrink Chuck

HSK63 shrink fit tool holder is a high-precision tool holder compatible with standard HSK63A/E/F hollow short taper spindles. It relies on the principle of thermal expansion and contraction for clamping: an induction shrink machine heats the clamping end of the holder to expand its inner hole, then straight-shank end mills or drills with h6 tolerance are inserted. After cooling, the holder tightly grips the cutter 360° evenly to form an integrated rigid connection, without intermediate accessories such as collets or lock nuts.

Manufactured from high-temperature resistant hot work tool steel (H13/40CrMoV5), it reaches an overall quenching hardness of 54±2HRC and can be thermally expanded and disassembled over 2,000 times. It fits machining centers and 5-axis machines equipped with mainstream HSK63 spindles.

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订单号 Order No	d	d1	D	L
HSK63-03-80	3	11	20	80
HSK63-04-80	4	14	25	80
HSK63-05-80	5	16	25	80
HSK63-06-80	6	21	27	80
HSK63-08-80	8	21	27	80
HSK63-10-85	10	24	31	85
HSK63-12-90	12	24	31	90
HSK63-14-90	14	27	34	90
HSK63-16-95	16	27	34	95
HSK63-18-95	18	33	40	95
HSK63-20-100	20	33	40	100
HSK63-25-115	25	44	53	115
HSK63-32-120	32	44	53	120

Selling Points of Shrink Fit Tool Holders

Ultra-high concentricity for mirror finishing

Radial runout ≤0.002~0.003mm at 4D position, far superior to ER holders (0.01~0.02mm), eliminating cumulative errors caused by collets and lock nuts.
Uniform 360° clamping eliminates tool deflection, greatly improving workpiece surface finish and removing extra polishing processes.
Stable repetitive clamping accuracy independent of operator technique, ensuring consistent dimensional tolerance for mass production.
Sales pitch: Micron-level rotational precision, ideal for high-precision machining of molds, 3C products and medical devices.

2. Powerful clamping force & high torque for rough and finish machining

Uniform shrinkage gripping force generated by thermal expansion and contraction delivers over twice the clamping power of ER collets under the same outer diameter. No slipping or tool dropping during heavy cutting.
Integrated one-piece structure maximizes rigidity, anti-vibration performance for deep cuts and hard material machining without chatter marks.
Supports high feed rates and deep cutting depths, boosting machine efficiency and reducing single-piece processing time.

3. Slim compact design, zero interference for deep & narrow cavities

Thin-wall front end with small taper (3°/4.5° slim version) without protruding nuts or collets, far better clearance than ER and hydraulic holders.
Reaches deep mold cavities, narrow ribs, 5-axis undercuts and deep slots, avoiding collision risks of conventional holders.
Higher rigidity with identical overhang length, allowing shorter tool projection and extended tool service life.

4. Superior dynamic balance for ultra-high spindle speeds

Fully symmetrical smooth body without protruding nuts, zero extra unbalance and low wind resistance at high rotation. Achievable balance grade G1/G2.5.
Compatible with high-speed spindles from 20,000rpm to 40,000rpm, perfect for high-speed machining of graphite, aluminum alloy and micro cutters.
Minimal vibration during high-speed rotation.