3M SR Cutter No.8, 0.83 in x 1.015 in, 50/Carton, 2Case of 50

• Cleans without chemical solvents, eliminating chemical mess and waste
• Easy-to-use cutter attaches to a rotary tool to replace time-consuming hand scraping with metal scrapers that gouge the workpiece
• Metal mandrel fits a right angle power tool
• No. 3 cutter is for flat applications—its 0.4" diameter fits between rivets and into tight spaces
• No. 8 cutter is 1" in diameter and has an internal cavity designed to fit directly over rivets or other protrusions for thorough cleaning
• Primarily used in the aerospace industry
• Removes sealants and coatings cleanly with minimal or no abrasion to underlying paints, primers or metal

The 3M SR Cutter is a plastic rotary cutting tool with an attached 1/4"-28 male threaded metal mandrel for use on slow speed right angle drills. The SR Cutter works quickly and efficiently to peel off sealants or other thick coatings with minimal to no abrasion to the underlying base material, replacing tedious scraping by hand and messy chemical solvents.

A Great Alternative to Tedious Hand Scraping
We designed the 3M SR Cutter to save time and increase productivity for cleaning operations typical in the aerospace industry. Two different sizes are available to enable effective coating removal—No. 3 for flat surfaces and No. 8 for cleaning on and around rivets or other fasteners. The cylindrical blades work both horizontally and vertically against the workpiece to cut through sealants such as polysulfide, polythioether, polyurethane, RTV sealants and silicones. The plastic blades work effectively without the operator having to pause and resharpen them. The SR Cutter works fast and helps eliminate follow-up work for repainting or repairing damaged coatings.

Cleanly Replaces Chemical Solvents
Not only is the 3M SR Cutter a great alternative to hand scraping, but it works without the use of messy chemical solvents. It enables operators to remove sealants and residues immediately, without having to wait for chemicals to act or spending time and effort handling and cleaning up a hazardous mess. Your only waste is the sealant itself.

Using the 3M SR Cutter

• No. 3 Cutter: For fillet seals and flat applications, place the No. 3 SR Cutter at head of sealant bead so that the side of cutter contacts the sealant. Apply firm pressure downward onto the sealant and use low rotational speed (throttle down on drill) to remove sealant from one spot without moving the drill back and forth. When the substrate is exposed, increase the rotational speed of the drill and move the tool along the strip of sealant, making sure that the cutter blades adjacent to the substrate rotate into the remaining sealant bead.


• No. 8 Cutter: For fastener heads, be sure that the inner diameter of the No. 8 SR Cutter will completely fit over the head of the fastener. Place the cutter on top of the fastener with firm pressure. Using the drill throttle, run at low speed to cut away sealant from around the fastener. Remove the sealant by "jogging" the drill in a start-stop fashion several times—this prevents unwanted frictional heat that may degrade the sealant or blunt the cutter.

3M SR Cutter Model

The 3M SR Cutter No. 8 is designed for efficient sealant removal in aerospace and industrial settings. This model offers a reliable alternative to hand scraping, saving time and reducing operator fatigue.

Its plastic rotary cutting blades work quickly to peel off coatings without damaging the underlying surface. The No. 8 cutter is especially suited for cleaning around rivets and fasteners, making it a versatile tool for maintenance tasks.

Precise Cutter Dimensions

The cutter measures 0.83 inches by 1.015 inches, providing a compact size that fits well in tight spaces. This dimension allows the tool to access hard-to-reach areas where sealants accumulate.

Its size ensures thorough cleaning around protrusions like rivets, while maintaining control and precision during use. The cutter’s diameter supports effective removal without harming adjacent materials.

Right Angle Tool Compatibility

This cutter includes a metal mandrel with a 1/4"-28 male thread, designed to fit right angle power tools. This compatibility enables users to attach the cutter easily to rotary drills for improved handling.

Using the cutter with a right angle drill enhances access to difficult angles and surfaces. The mandrel’s metal construction ensures durability and secure attachment during operation.

Efficient Pack Size Options

The product is available in packs of 50 cutters per carton and 250 cutters per case. This packaging supports both small-scale and large-scale maintenance operations, offering flexibility in inventory management.

Having multiple cutters on hand reduces downtime by allowing quick replacement when blades wear out. The pack sizes cater to different user needs, from individual technicians to larger teams.

Safe Chemical-Free Cleaning

The 3M SR Cutter removes sealants without chemical solvents, eliminating messy cleanup and hazardous waste. This feature promotes a safer work environment and reduces environmental impact.

Operators can remove coatings immediately without waiting for chemicals to act. The cutter’s plastic blades minimize abrasion, preserving underlying paints, primers, and metal surfaces.