3M 7000028221 Rubber Slotted Expander Wheel 5x3.5 in

Product Description

The 3M 7000028221 is an internally slotted rubber expander wheel designed for use with inline sanders in metal finishing applications. The slotted rubber drum expands outward under centrifugal force, keeping abrasive belts seated firmly and under consistent tension during operation. Measuring 5 inches in diameter by 3.5 inches wide with a 5/8 inches arbor hole, the wheel features a 0.25 inch radius edge profile that reduces the risk of edge cuts on workpieces. It is compatible with 3M Inline Sanders and accepts standard coated abrasive and surface conditioning belts sized 3.5 inches x 15.5 inches.

This expander wheel is suited for metalworking and metal finishing tasks in both shop and field environments. It is primarily used to generate straight-line scratch patterns on stainless steel and other metals, making it a common tool for weld blending, surface prep, and decorative finishing work. Fabricators and metal finishing specialists working with stainless steel panels, tubing, and structural components will find this wheel appropriate for consistent scratch-line generation. It is designed for use with 3M Inline Sanders PN28338 and PN28339 and requires the 3M 3 Wheel Adaptor Kit PN45038 for proper mounting.

Key Features

• Internally slotted rubber construction expands with centrifugal force to maintain belt tension automatically
• 0.25 inch edge radius minimizes edge cuts on finished workpiece surfaces
• 5/8 inches arbor hole fits standard inline sander spindles
• Accepts 3M Coated Abrasive belts and 3M Surface Conditioning belts sized 3.5 inches x 15.5 inches
• Generates straight-line scratches suitable for stainless steel and other metal finishing

Compatibility

Designed for use with 3M Inline Sanders PN28338 and PN28339. Accepts 3M Coated Abrasive belts and 3M Surface Conditioning belts measuring 3.5 inches x 15.5 inches. Mounting to 3M Inline Sanders requires the 3M 3 Wheel Adaptor Kit PN45038.

Installation Notes

Installation and belt changes should be performed with the sander fully disconnected from the air supply. The 3 Wheel Adaptor Kit PN45038 must be installed before mounting this wheel to compatible 3M Inline Sanders. Verify belt size and arbor hole diameter match before assembly. Allow the wheel to reach operating speed before applying it to the workpiece surface to ensure proper belt seating.

Technical Specifications

• Wheel Diameter: 5 inches
• Wheel Width: 3.5 inches
• Arbor Hole Diameter: 5/8 inches
• Edge Radius: 0.25 inches
• Compatible Belt Size: 3.5 inches x 15.5 inches
• Weight: 1 pound
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000028221