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This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-4971339-A, on 20 November 1990. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000003438

Collet type work driver

Published
Permanent URL
Classification
Tools & Tooling › Fastening Tools
Assignee
ILLINOIS TOOL WORKS
Original source
US-4971339-A, the United States Patent and Trademark Office, 20 November 1990
Document SHA-256
9406919d1c6f0c777e30d9c3ab70aaf0b610e36876e4db6b792bef0d98ec30be

A collet type work driver for holding and driving a workpiece which is located between work centers upon a grinder, lathe or similar machinery, is disclosed. The work driver includes a unique free-floating collet package which rotates essentially free from contact with the remaining components of the work driver. Radial positioning forces are thus eliminated and existing workpiece eccentricities are automatically accommodated. The work driver can be rapidly loaded and unloaded and can have a significant effect upon production rates. The collet package portion is loosely retained within the work driver during idle periods and will not be lost or damaged. Uniform gripping action by means of the work driver eliminates workpiece deflection and surface marking and enables the device to be used with very fragile and brittle workpieces.

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Abstract

A collet type work driver for holding and driving a workpiece which is located between work centers upon a grinder, lathe or similar machinery, is disclosed. The work driver includes a unique free-floating collet package which rotates essentially free from contact with the remaining components of the work driver. Radial positioning forces are thus eliminated and existing workpiece eccentricities are automatically accommodated. The work driver can be rapidly loaded and unloaded and can have a significant effect upon production rates. The collet package portion is loosely retained within the work driver during idle periods and will not be lost or damaged. Uniform gripping action by means of the work driver eliminates workpiece deflection and surface marking and enables the device to be used with very fragile and brittle workpieces.

1. Drawings

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003438, “Collet type work driver,” published September 15, 2026 at 20:27:37 UTC, https://opentechnical.org/p/OT-2026-000003438.

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