3M 7100115103 Pinion for 3M 3125 Sander

Product Description

The 3M 7100115103 is a factory replacement pinion designed for use with the 3M 3125 Sander. A pinion is a critical drive gear component that transmits rotational force within the sander's internal gear train, directly affecting tool performance and longevity. When a pinion wears or fails, the tool loses drive efficiency or becomes inoperable. Installing a genuine replacement part restores the tool to original operating condition. This part is sold individually and is intended for installation by a qualified tool repair technician familiar with pneumatic or electric sander disassembly procedures.

This pinion is a direct-fit replacement for the 3M 3125 Sander, used in industrial, manufacturing, and trade environments where surface preparation and finishing work demand reliable equipment uptime. Typical applications include body shop work, metal fabrication, woodworking, and general production sanding. Refer to the 3M 3125 Sander Owner's Manual Parts List and tool schematic to confirm correct part placement before ordering or beginning disassembly.

Key Features

• Genuine replacement pinion engineered specifically for the 3M 3125 Sander
• Restores drive train function when original pinion is worn or damaged
• Sold individually for single-unit replacement
• Designed to OEM specifications for proper fit and performance

Compatibility

Designed as a direct replacement component for the 3M 3125 Sander. Consult the Owner's Manual Parts List and tool schematic to verify fitment before installation.

Installation Notes

Installation should be performed by a qualified tool repair technician. Disconnect the tool from all power or air supply sources before beginning any disassembly. Refer to the official 3M 3125 Sander Owner's Manual and parts schematic for correct disassembly sequence and component placement. Do not force the pinion during installation, as improper seating can damage the gear train.

Technical Specifications

• Unit of Measure: Each
• Minimum Order Quantity: 1
• UPC: 00051141308005

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100115103