3M 7000119381 | 30621 Belt Tension Spring

Description

The 3M 7000119381 (30621) belt tension spring is a genuine 3M replacement component designed for use in 3M file belt sanders. This tension spring helps maintain constant, optimal tension on the sanding belt, ensuring smooth belt tracking, consistent contact pressure, and extended belt life. Ships individually, with direct compatibility with the OEM 30621 assembly.

Product Features and Benefits

Genuine OEM Part

Manufactured by 3M as part number 30621 / 7000119381 to match the original design.

Precision Spring Force

Engineered to apply the correct tension to maintain belt alignment and minimize slippage.

Durable Material

Constructed from quality spring steel to resist fatigue and maintain performance over repeated cycles.

Compact, Easy to Install

Sized to fit directly into the tensioning mechanism of compatible 3M file belt sander assemblies.

Affordable Replacement

Low-cost spare, often under US$3 per spring.

Consistent Belt Tension

Maintains the proper force to keep sanding belts tight and tracking correctly, reducing drift or slippage.

Improved Belt Life & Finish

Stable tension results in more uniform belt wear and smoother surface finishes.

Tool Reliability & Reduced Downtime

By replacing a worn or weakened spring, you restore correct functionality without replacing the entire tensioner assembly.

OEM Fit & Compatibility

As a genuine 3M part, the spring matches original specifications, eliminating guesswork.

Frequently Asked Questions

Which tools use the 3M 30621 / 7000119381 spring?

It is intended for use in 3M file belt sanders (as a belt tension spring), replacing the OEM 30621 spring.

Is this sold individually or in packs?

It is sold individually (one spring per bag) in many listings.

What is its country of manufacture?

Some listings note Taiwan as the country of origin.

What is the typical cost?

Prices in suppliers’ catalogs are around US$2.00 to US$3.00 per spring.

How can I confirm compatibility?

Cross-check with your sander’s parts list / schematic to see if it calls for spring number 30621 (or 7000119381). Also verify dimensions and mounting geometry before ordering.

Warning:

This product can expose you to materials and/or chemicals including arsenic, lead, and other materials and/or chemicals which are known to the state of California to cause cancer and/or reproductive harm.

For more information, visit www.P65Warnings.ca.gov