3M 7100138157 Spiral Band 36 Grit 3x3 Inches

Product Description

The 3M 7100138157 is a coated abrasive spiral band designed for aggressive material removal in drum sander and spindle sander applications. Built on a heavy cloth backing (X-weight), it uses aluminum oxide grain bonded to a flexible substrate that conforms to curved and contoured workpieces. At 36 grit, this is a very coarse-grade abrasive suited for rapid stock removal, shaping, and deburring on wood, metal, and composites. The band measures 3 inches in diameter by 3 inches wide and is rated to a maximum of 3000 RPM. Licensed metalworking and woodworking professionals keep these on hand for high-volume material removal cycles.

This spiral band is used in both shop and field settings where aggressive surface preparation or contouring is required. Typical applications include shaping inside curves, removing weld flash, smoothing rough castings, and preparing wood stock on spindle or drum sanders. The spiral cut of the band reduces loading and heat buildup compared to straight-seam bands, extending usable life in continuous-run operations. It is equally applicable in HVAC fabrication shops, millwork operations, and metal fabrication environments where fast, controlled stock removal is a regular task.

Key Features

• Aluminum oxide abrasive grain for consistent, aggressive cut on wood, metal, and composites
• 36 grit very coarse grade for rapid stock removal and shaping
• Heavy X-weight cloth backing provides durability and flexibility on contoured surfaces
• 3-inch diameter by 3-inch wide format fits standard drum and spindle sander mandrels
• Rated to 3000 RPM maximum for safe use at typical sander operating speeds
• Spiral-cut construction reduces seam loading and extends band life

Compatibility

Designed as a direct-fit replacement for 3-inch diameter by 3-inch wide spiral band sander mandrels commonly used in drum and spindle sanding equipment rated up to 3000 RPM.

Installation Notes

Installation is performed by woodworking or metalworking tradespeople using standard drum or spindle sander mandrels. Ensure the sander is fully powered down and the mandrel is stationary before mounting or removing the band. Confirm the machine operating RPM does not exceed the 3000 RPM maximum rating of this band before use. Inspect the band for tears or edge damage prior to each session and replace immediately if defects are found.