1-1/2 x 132 Inch Metalworking Sanding Belts: What Fits?
By Red Label Abrasives | Published: 2026-10-23
Category: Buying Guides
Find out which sanders accept 1.5 x 132 inch belts, what to use them for, and how to choose the right grit for metalworking.
Quick answer
1-1/2 x 132 inch sanding belts fit long-belt industrial grinders and specialty knife-making machines—not standard benchtop sanders. The 132-inch length suits multi-wheel setups where you need a long loop for even wear and heat dissipation.
Why choose a 132-inch belt?
Most home-shop sanders use belts around 42 to 48 inches. A 132-inch belt is more than twice as long, which means more abrasive surface in contact with the work and better cooling because the belt spends more time out of the cut. This makes 132-inch belts ideal for heavy stock removal on metal without overheating the workpiece.
Trade-off: fewer machine options
The 1.5-inch width combined with the 132-inch length is a niche size. It fits certain Bader, KMG, and custom knife-making grinders, but not most belt sanders from major tool brands. Before buying, confirm your machine's belt length requirement—many grinders that accept 132-inch belts also accept 72-inch or 108-inch belts with different platen setups.
How to choose and use 1.5 x 132 belts
- Check your sander's belt length: Measure the distance between the drive and idler wheels at full extension, then add slack for tensioning. Most 132-inch belts require a machine with a minimum center distance of about 60 inches.
- Pick grit by metal type and task: Start with 36 to 60 grit for rough shaping and bevel grinding on carbon steel. Use 80 to 120 grit for blending and refining. For stainless or high-alloy steels, aluminum oxide belts with a top coat (like the Flex belts) reduce heat buildup that can ruin edge hardness.
- Adjust tracking for long belts: Long belts are more sensitive to tracking misalignment. Run the machine at low speed first, adjust the tracking knob in small increments, and let the belt settle before making heavy cuts. A belt that wanders can damage the edge or come off the wheels. If the belt drifts after initial adjustment, check for worn or crowned wheels.
- Use light spritzing for cooler cuts: The Flex J-weight backing can handle occasional water spritzing to cool the work and reduce dust, but do not soak the belt or use a continuous water drip. For wet grinding, choose a fully waterproof belt.
Product highlights
- 1 1/2 X 132 Inch Flex Aluminum Oxide Metalworking Sanding Belts, 6 Pack: Closed coat aluminum oxide with a load- and heat-reducing top coat; Flex J-weight backing handles light spritzing but is not fully waterproof. The top coat keeps the belt cutting longer on metal without clogging, and the flexible backing follows curved surfaces like knife bevels without cracking.
1 1/2 X 132 Inch Flex Aluminum Oxide Metalworking Sanding Belts, 6 Pack
Who should buy 1.5 x 132 belts?
Best for
- Knife makers using Bader BIII, KMG, or similar grinders with 132-inch capability
- Metalworkers who need a long belt loop for even wear and cooler cutting on hard steels
- Users who already own a machine that accepts 132-inch belts and want a reliable aluminum oxide option
Not for
- Home shop users with standard 4x36 or 6x48 belt sanders
- Anyone who hasn't confirmed their grinder's belt length compatibility
