HSK-A40 Hydraulic Expansion Chuck

K101656421252838 article numbers

High Clamping Force
Runout ≤ 0.003 mm

A hydraulic expansion chuck that clamps the shank with a uniform oil film. One hex screw sets the pressure, and the film damps chatter that a rigid holder would pass straight into the cutting edge.

Type of Product: Hydraulic Expansion Chuck
Interface: HSK-A (DIN 69893-1)
Shank & Holder: HSK-A40
Clamping Ø: Ø6, Ø8, Ø10, Ø12, 1/4", 5/16", 3/8", 1/2"
Standard: DIN 69893-1 Form A
Coolant Supply: Central

Order number

8 articles match

Select the dimensions below to find your order number.

Clamping diameter

d · mm

Balanced G2.5 @ 25,000 rpmCatalogue Volume 1, p. 72

Description

A hydraulic expansion chuck that clamps the shank with a uniform oil film. One hex screw sets the pressure, and the film damps chatter that a rigid holder would pass straight into the cutting edge.

Quality assurance

High Clamping Force

Runout ≤ 0.003 mm
Excellent Damping
Balanced G2.5 @ 25,000 rpm
In Stock

Features

Runout under 0.003 mm at 2.5× diameter, repeatable over the tool life
Clamps and releases with a single hex key — no heating, no external equipment
Oil film raises tool life by up to 30% in reaming and finish milling
Reduction sleeves take the clamping range down without loss of accuracy

Technical specifications

Type of Product	Hydraulic Expansion Chuck
Interface	HSK-A (DIN 69893-1)
Shank & Holder	HSK-A40
Clamping Ø	Ø6, Ø8, Ø10, Ø12, 1/4", 5/16", 3/8", 1/2"
Standard	DIN 69893-1 Form A
Coolant Supply	Central
Balancing Grade	G2.5 @ 25,000 rpm
Availability	In Stock

Dimension table

8 article nos.

8 article numbers

Item name	dmm	D1mm	D2mm	G	Lmm	L1mm	L2mm	Weightkg
HSK-A 40 HC06 070 2.5G 25000 SL	6	26	33.5	M5	70	37	36	0.45
HSK-A 40 HC08 070 2.5G 25000 SL	8	28	33.5	M6	70	37	36	0.455
HSK-A 40 HC10 075 2.5G 25000 SL	10	30	33.5	M6	75	41	42	—
HSK-A 40 HC12 080 2.5G 25000 SL	12	32	33.5	M6	80	46	48	—
HSK-A 40 HC1/4'' 070 2.5G 25000 SL	1/4"	26	33.5	M5	70	37	36	—
HSK-A 40 HC5/16'' 070 2.5G 25000 SL	5/16"	28	33.5	M6	70	37	36	—
HSK-A 40 HC3/8'' 075 2.5G 25000 SL	3/8"	30	33.5	M6	75	41	42	—
HSK-A 40 HC1/2'' 080 2.5G 25000 SL	1/2"	32	33.5	M6	80	46	48	—

Need a modified version? We build to print.

Special gauge lengths, clamping diameters and interfaces — engineered and manufactured in-house at Pune.