Jacobs 9756 Rubber-flex Collet Chuck Straight Shank

Product Description

The JACOBS 9756 is a Rubber-Flex collet chuck designed for secure, precise workholding in drilling and light milling operations. It accepts round stock and tooling from 0.0938 inches (3/32 inch) to 0.25 inches (1/4 inch) capacity, making it suitable for small-diameter drill bits, end mills, and similar cutting tools. The straight shank design measures 0.25 inches in diameter and provides straightforward installation into compatible spindles and tool holders. Overall length is 1.88 inches. The chuck uses a key-actuated mechanism to tighten the Rubber-Flex collet, delivering consistent clamping force around the tool shank. Machinists and tooling technicians working on manual or CNC machine tools install this chuck as part of a standard workholding setup.

This collet chuck is suited for light-duty machining applications in job shops, maintenance facilities, and production environments. It is appropriate for use with small drill bits, reamers, and rotary tools where accurate concentricity and repeatable grip are required. The compact 1.88-inch overall length makes it a practical choice where spindle clearance is limited. The collet nut diameter is 0.9000 inches. No through-coolant capability is present, so it is best applied in dry or flood-coolant-from-outside setups.

Key Features

• Rubber-Flex collet system provides consistent radial clamping across the full capacity range
• Capacity range: 0.0938 inches to 0.25 inches for small-diameter tooling
• Straight shank at 0.25 inches diameter for broad spindle compatibility
• Key actuator for positive, controlled tightening
• Compact 1.88-inch overall length suits tight-clearance setups
• No through-coolant path - suited for external coolant or dry-cut applications

Compatibility

Designed as an OEM-style Rubber-Flex collet chuck for use with compatible straight-shank spindle and tool holder systems accepting a 0.25-inch straight shank. No specific machine model compatibility was stated in the available product data.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Power down and lock out the machine spindle completely before installing or removing the chuck. Use the correct chuck key to seat and tighten the collet; do not overtighten or use unauthorized leverage tools, as this can damage the Rubber-Flex collet or shank bore. Verify shank seating depth and runout with a dial indicator before returning the machine to service.