OPENTECHNICAL PUBLICATION
OT-2026-000003416

Actuating arrangement for a clamping device in a machine tool spindle

Published: 2026-09-15T20:25:10.437085Z
Permanent URL: https://opentechnical.org/p/OT-2026-000003416
Categories: Tools & Tooling > Clamping Tools

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ABSTRACT

An actuating arrangement for a tool clamping device (1) has a clamping bar (3)
which is axially displaceable in a clamping direction in a machine tool
spindle (2) under the effect of a spring arrangement (11), and a wedge
transmission assembly (9) which is operable between the spindle and the
clamping bar, with freely movable balls which bear respectively against three
cone surfaces of which the first is provided on a clamping sleeve (10) which
is axially displaceable in the clamping direction on the clamping bar under
the force of the spring arrangement (11), the second is provided on a clamping
ring (12) connected to the clamping bar (3) and the third is provided on a
support ring (13) which is arrangd stationarily with respect to the spindle.
Provided on the support ring is a fourth cone surface (18) which is inclined
relative to the axis of the clamping bar in opposite relationship to the third
cone surface. A piston-cylinder unit (7, 8) is releasably connected to a
release ring (20) provided in the region of the balls (14), by way of a
locking means which acts in dependence on travel movement.

1. Drawings

[0001] Sheet 1.

[0002] Sheet 2.

[0003] Sheet 3.

[0004] Sheet 4.

[0005] Sheet 5.

[0006] Sheet 6.

[0007] Sheet 7.

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OpenTechnical publication OT-2026-000003416
Published 2026-09-15T20:25:10.437085Z
https://opentechnical.org/p/OT-2026-000003416