3M™ 7010298949 Microfinishing Lapping Roll, 450 ft OAL x 2.67 in OAW, 9 micron Grit, Aluminum Oxide Abrasive, 5 mil Polyester Film Backing

Manufacturer : 3M

Abrasive Material : Aluminum Oxide

Applicable Materials : Plastic

Backing Material : 5 mil Polyester Film

Brand Name : 3M™

Country Of Origin : GB

Package Description : 1/PK

Standards : OSHA 29 CFR 1910.1200

Product Status : Discontinued

See all product specifications

• Features a closed coat construction for finish consistency
• Available in a versatile range of grades, so operators can select the right grade for their application
• Durable 5 mil backing won’t deflect when run, so it can stand up to edges and contours
• Micron-graded aluminum oxide mineral cuts sharp but won’t gouge or mar the substrate

The 3M™ microfinishing film roll 272L produces close tolerance surface finishes on a range of substrates from gelcoat and soft rubber to fiberglass and metals. Designed especially for microfinishing applications of automotive powertrain components. 3M™ microfinishing film roll 272L is designed for a variety of common microfinishing applications, from cylindrical and centerless grinding and finishing to roll superfinishing. It’s also a great match for automotive powertrain components, which tend to require a flexible abrasive that can get into hard-to-reach spaces. As a roll, 272L has great flexibility in terms of its form. The roll can be cut and shaped to meet the dimensions of your part or project and may be used by hand or with microfinishing machines.3M™ engineers the 3M™ microfinishing film roll 272L by anchoring aluminum oxide mineral to a polyester film backing with resin. 3M™ chose aluminum oxide mineral for this abrasive, because it is a popular choice among industrial professionals who favor the fast cut rate and long life. Aluminum oxide’s hardness, strength and low heat retention help the roll withstand wear and tear. 3M™ microfinishing film roll 272L features a 5 mil polyester backing. In general, film backed abrasives are known for their flexibility, incompressibility and caliper consistency it’s what makes them a great match for microfinishing operations. The anti-slip or friction coating on the back of the roll aides in preventing slippage during the microfinishing application, which is critical to consistency from part to part. Made with polyester, 3M™ microfinishing film roll 272L is water-resistant and can be run wet or dry. Applying a lubricant like water may help with washing away unwanted swarf and debris, which can clog the roll and cause the mineral to dull prematurely. On dust-generating substrates, using a lubricant can come in handy. The resin bond that fastens aluminum oxide to the backing helps the abrasive stay cool, because it breaks down and dissolves gradually as the belt rotates. Given that it’s available in a versatile range of grades from 9 to 100 micron operators can select the right grade for their application. Higher grades, like 100 micron, are good for tougher applications providing coarser finishes, while lower grades, like 9 micron, are good for softer, finer finishes. Grades are color coded to reduce the risk for error when there are multiple grades in a sequence. Altogether, 3M™ microfinishing film roll 272L enables you to quickly remove traverse marks and feed lines, eliminate chatter, follow existing geometry and achieve desired Ra (roughness average).These are some of the reasons why this roll and other 3M™ microfinishing abrasives are used across industries from metalworking to woodworking.