SK40 Hydraulic Expansion Chuck (AD)

K101046291112822 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: SK (DIN 69871)
Shank & Holder: SK40
Clamping Ø: Ø12, Ø20
Execution: AD
Standard: DIN 69871 / DIN ISO 7388-1

Order number

2 articles match

Select the dimensions below to find your order number.

Clamping diameter

d · mm

Balanced G2.5 @ 25,000 rpmCatalogue Volume 1, p. 55

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
Made to Order

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

Availability
Type of Product	Hydraulic Expansion Chuck
Interface	SK (DIN 69871)
Shank & Holder	SK40
Clamping Ø	Ø12, Ø20
Execution	AD
Standard	DIN 69871 / DIN ISO 7388-1
Coolant Supply	Central (AD)
Balancing Grade	G2.5 @ 25,000 rpm

Dimension table

2 article nos.

2 article numbers

Item name	Article no.	dmm	D1mm	G	Lmm	L1mm	Weightkg	Download
SK40 HC12S 050 AD 2.5G 25000 SL		12	42	M10	50	40	1.182
SK40 HC20S 64.5 AD 2.5G 25000 SL		20	50	M16	64.5	42	1.392

Need a modified version? We build to print.

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