Value Collection 331-2204 Shell Reamer Arbor No. 4

Product Description

The VALUE COLLECTION 331-2204 is a No. 4 shell reamer arbor designed to mount and drive shell reamers in metalworking and machining operations. The arbor accepts shell reamers ranging from 21/32 inches to 25/32 inches in diameter and features a 1/2-inch diameter straight shank for secure chuck or collet mounting. With an overall length of 9 inches, this arbor provides the reach and rigidity needed for accurate reaming in a variety of bore finishing applications. It is installed by machinists and toolroom technicians working on precision bore sizing in metal fabrication and maintenance environments.

This shell reamer arbor is suited for use in drill presses, milling machines, and manual or CNC lathes where controlled bore finishing is required. The No. 4 arbor designation corresponds to standard shell reamer sizing conventions, making it a practical fit for shops that work within the 21/32-inch to 25/32-inch bore range. It is commonly used in both production and job-shop settings where shell reamers are preferred over solid reamers for cost-effective tool maintenance and regrinding.

Key Features

• No. 4 arbor number matches standard shell reamer sizing for 21/32 to 25/32 inch diameter reamers
• 1/2-inch diameter straight shank fits standard drill chucks and collet holders
• 9-inch overall length provides extended reach for deep bore applications
• Straight shank design simplifies mounting without requiring specialized toolholders

Compatibility

Designed for use with No. 4 shell reamers having a reamer diameter between 21/32 inches and 25/32 inches. Compatible with standard drill chucks and collets that accept a 1/2-inch straight shank.

Installation Notes

Shell reamer arbors are installed by machinists or toolroom technicians. Ensure the machine spindle is fully powered down and at a complete stop before mounting or removing the arbor. Secure the straight shank firmly in the chuck or collet to the manufacturer-recommended clamping procedure for the holder in use. Verify reamer-to-arbor engagement is complete and the drive keys are properly seated before beginning any reaming operation.