3M 7000000438 File Belt Sander Curved Arm Attachment

Product Description

The 3M 7000000438 is a curved arm attachment designed for use with 3M file belt sanders. It replaces the standard straight arm to give technicians access to contoured and flat blending applications that a conventional arm cannot reach efficiently. The curved geometry allows the operator to work a contact wheel or platen against the workpiece at angles suited to surface blending, deburring, and finishing. At 0.34 pounds, the attachment is lightweight and does not significantly alter the balance of the sander. It is sold as a single unit and is compatible with 1/2 inch x 18 inch coated abrasive and Scotch-Brite belts.

This attachment is suited to metal fabrication shops, maintenance and repair environments, and manufacturing settings where operators need to blend flat areas or transition zones on workpieces. It is particularly useful when standard straight-arm configurations do not provide the clearance or contact angle needed for consistent surface finishing. Welders, fabricators, and metalworking technicians are the primary users of this accessory.

Key Features

• Unique curved arm geometry for blending flat areas and contoured surfaces
• Compatible with contact wheel or platen operation
• Accepts 1/2 inch x 18 inch coated abrasive and Scotch-Brite belts
• Lightweight at 0.34 pounds for minimal impact on sander balance
• Sold as a single replacement or supplemental attachment

Compatibility

Designed for use with 3M file belt sanders that accept 1/2 inch x 18 inch belts. Compatible with 3M coated abrasive belts and Scotch-Brite belts in the specified size.

Installation Notes

Installation of this attachment should be performed by a qualified operator familiar with abrasive power tool accessories. Disconnect and de-energize the sander before swapping or mounting any arm attachment. Follow the tool manufacturer's instructions for securing the arm to the sander body, and confirm all fasteners are properly tightened before resuming operation. Always verify belt tracking and tension after installing the attachment and before applying it to a workpiece.

Technical Specifications

• Belt Size: 1/2 inch x 18 inches
• Weight: 0.34 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 1
• UPC: 00051141283746

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000000438