3M Rubber Slotted Expander Wheel 77720, 2 in x 1 in 1/4 Diameter Shank

• More consistent performance than pneumatic wheels
• Radiused edges reduce transition lines
• Soft 25-durometer rubber helps to create a fine finish
• Use 3M Wheel Adapter Kit to mount on 3M Inline Sander or 3M Match & Finish Tool
• Uses centrifugal force to grip the abrasive belt

The 3M Rubber Slotted Expander Wheel utilizes centrifugal force to grip abrasive belts while grinding. Use this wheel on a 3M Inline Sander or 3M Match & Finish Tool. It comes in three diameters and two center hole diameters.

Soft Conformable Rubber, Radiused Edges
Our 3M Rubber Slotted Expander Wheel can be mounted on a 3M Inline Sander or 3M Match & Finish Tools using a 3M Wheel Adapter Kit. We designed this wheel with soft 25-durometer rubber to keep it conformable for applications like stainless steel finishing. Radiused edges reduce transition lines as the tool makes passes across the work surface.

Centrifugal Force Is More Secure
This wheel uses centrifugal force to grip the belt rather than conventional pneumatic wheels, or tires, which rely upon the amount of air pressure they are filled with. Centrifugal force is ultimately far more efficient and consistent.

In three diameters of 3, 3.4 or 5 inches, the smaller diameter tends to obtain a tighter grade pattern and gets into tighter spaces.

Recommended Applications
Our 3M Rubber Slotted Expander Wheel is ideal for finishing stainless steel when mounted to a 3M Inline Sander or 3M Match & Finish Tool. Having mounted the expander wheel to the sander using the 3M Wheel Adapter, follow a 2-step process for finishing stainless steel, either with or without a weld:

• The coated abrasive belt 777F, 120 grit, can be used to set the grain and remove defects using the 3M Inline Sander (28339) at 3,500 rpm.
• Use our Scotch-Brite Surface Conditioning Belt, A Med, to blend the surface to a #4 finish.

3M Rubber Expander Wheel

The 3M Rubber Slotted Expander Wheel 77720 offers consistent performance with its soft 25-durometer rubber construction. This model is designed to provide a fine finish while reducing transition lines thanks to its radiused edges.

Its unique design uses centrifugal force to grip abrasive belts securely, making it more reliable than pneumatic wheels. This wheel fits perfectly with 3M Inline Sanders and Match & Finish Tools for professional results.

Precise Dimensions Included

This expander wheel measures 2 inches by 1 inch with a 1/4 inch diameter shank, ensuring compatibility with various sanding tools. These exact dimensions allow for precise control and access to tight spaces during finishing tasks.

The smaller size helps achieve a tighter grade pattern, ideal for detailed work on stainless steel and other metals. Its compact format supports efficient finishing in confined areas.

Secure Belt Attachment

The 3M 77720 model uses centrifugal force to hold abrasive belts firmly in place. This method is more consistent than pneumatic wheels, which depend on air pressure, providing a stable and efficient sanding experience.

Using the 3M Wheel Adapter Kit, this expander wheel mounts easily on 3M Inline Sanders or Match & Finish Tools. This secure fit enhances belt grip and overall tool performance.

Ideal Stainless Steel Finishing

This expander wheel is perfect for finishing stainless steel surfaces when paired with a 3M Inline Sander or Match & Finish Tool. Its soft rubber and radiused edges help reduce visible transition lines for a smooth finish.

Recommended abrasive belts include the 777F 120 grit for setting the grain and removing defects, followed by Scotch-Brite Surface Conditioning Belt A Med to achieve a #4 finish.

Compact Format And Use

The 3M Rubber Slotted Expander Wheel 77720 comes in a compact size that supports detailed sanding work. Its 2 in x 1 in dimensions and 1/4 inch shank diameter make it easy to handle and maneuver.

This model is designed for use with 3M sanding systems, ensuring compatibility and ease of use. Its format supports efficient finishing in both industrial and workshop settings.