Accupro 02702991 Back Chamfer 1/4 in 90 Degree Carbide

Product Description

The ACCUPRO 02702991 is a solid carbide back chamfer tool designed for creating precise chamfers on the reverse side of drilled or bored holes. With a 0.25 inch cutter head diameter and a 90-degree included angle, this tool produces a 0.035 inch chamfer width and a 0.031 inch flat width in a single pass. The bright, uncoated carbide construction provides rigidity and edge retention across a range of materials. Machinists and toolroom technicians install this tool in standard CNC machining centers and manual mills where back-chamfering operations are required without repositioning the workpiece.

This back chamfer tool is suited for production and precision machining environments where deburring, chamfering, or beveling the underside of through-holes is part of the workflow. The 0.25 inch shank diameter fits directly into standard collets and tool holders commonly found in vertical machining centers and manual knee mills. The 0.170 inch neck diameter provides clearance for reaching back-side hole edges in moderate-depth applications, with a cutter-head-to-shank length of 0.775 inches supporting controlled engagement depth.

Key Features

• Solid carbide construction for rigidity and edge retention
• 90-degree included angle produces consistent back chamfers in one pass
• 0.035 inch chamfer width and 0.031 inch flat width for controlled material removal
• Bright, uncoated finish suitable for a broad range of workpiece materials
• Right-hand cutting direction, compatible with standard spindle rotation
• 0.170 inch neck diameter provides clearance for back-side hole access

Compatibility

Designed for use with standard 1/4 inch collets and tool holders in CNC machining centers and manual milling machines configured for right-hand cutting operations.

Installation Notes

This tool is installed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before inserting or removing the tool from the collet or holder. Verify that the collet size matches the 0.25 inch shank diameter before tightening. Follow the machine manufacturer and shop safety guidelines for feeds, speeds, and tool runout before initiating a back-chamfering cycle.