The 3M™ Microfinishing Film Belt 272L was designed to deliver close tolerance precision finishes on a versatile range of substrates – from gelcoat and soft rubber to fibreglass and metals.The 3M Microfinishing Film Belt 272L was designed by anchoring aluminum oxide mineral to a polyester film backing with resin. This belt is uniquely suited to help with sheet polishing, finishing, and flat finishing. Aluminum oxide mineral was chosen for this abrasive belt, as it is a popular choice among industry professionals who favour the fast cut rate and long life. Aluminum oxide's hardness, strength, and low heat retention help the belt withstand the repeated wear that grinding and finishing often demand. The polyester film backing on the 3M Microfinishing Film Belt 272L is water-resistant, so the belt can be run wet or dry. By applying a lubricant, like water, as the abrasive runs, operators may be able to wash away swarf and debris that tend to clog the abrasive or warp and discolour the substrate. The resin bond that fastens aluminum oxide to the backing helps the abrasive stay cool, because it breaks down gradually as the belt rotates. Altogether, this film-backed belt enables you to quickly achieve desired Ra (roughness average) and other surface finish parameters. These are some of the reasons why this belt is used across industries - from metalworking to woodworking.