VDI25 Hydraulic Chuck

K102856366331272 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: VDI Shank
Shank & Holder: VDI25
Clamping Ø: Ø12, 1/2"
Standard: DIN 69880 (VDI)
Coolant Supply: Central

Order number

2 articles match

Select the dimensions below to find your order number.

Clamping diameter

d · mm

Balanced Balanced to G2.5Catalogue Volume 1, p. 130

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 Balanced to G2.5
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

Type of Product	Hydraulic Expansion Chuck
Interface	VDI Shank
Shank & Holder	VDI25
Clamping Ø	Ø12, 1/2"
Standard	DIN 69880 (VDI)
Coolant Supply	Central
Balancing Grade	Balanced to G2.5
Availability	Made to Order

Dimension table

2 article nos.

2 article numbers

Item name	Article no.	dmm	Dmm	D1mm	D2mm	G	Lmm	L1mm	L2mm	Download
VDI 25 HC12 L055 (with stopper)		12	25	32	58	M10	55	46	37
VDI 25 HC1/2'' 055 - (with stopper)		1/2"	25	32	58	M10	55	46	37

Need a modified version? We build to print.

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