Carbon & Aluminium Sanding Disc

Introduction

5” and 6” Discs

Both PSA and Hook and Loop discs are used for medium stock removal to finishing applications Cloth discs are suited to the more aggressive applications due to their higher tear resistance. Paper discs are used in finishing applications. Paper and film substrates are manufactured to be flatter than cloth substrates and for this reason are the best choice for finer grits where surface finish and maintaining flat surfaces during grinding is required. In critical fine finishing applications with tight tolerances, such as cam shaft grinding, film is the only product to use. To maintain a smooth finish the backing pads can have varying levels of cushioning to allow the discs to contour over a surface rather than gouge. 

A common feature of 5” and 6” discs are vacuum holes. The holes in the disc are connected through the back-up pad and tool to a vacuum line. This technology came from automotive body shops that required the dust created in the finishing process be sucked away from the surface to keep the area clean. 5 holes and 8 holes are the two formats.

7” and Larger Discs

These will always be PSA discs and will be used on stationary machines often found in maintenance and repair shops for odd jobs and repair jobs. The discs are mounted directly to a steel platen.

PSA Discs and PSA Disc Rolls

PSA 5” and 6” paper discs are available as individual discs with a liner or as a disc roll where the discs are attached to one another in roll form without a liner paper. The disc rolls are often more convenient for the end user as there is no liner to dispose of and the disc roll can be kept as a single unit. Individual discs need to be kept in a box to ensure the stack of discs stays together. 

Note on PSA Adhesive

Regardless of the disc size the PSA used must securely hold the disc to the pad or platen yet easily be removed after the disc is finished. The disc must not leave any residue on the pad or platen as this would given a uneven grinding surface with the next disc. This presents a highly technical challenge to the disc manufacturer, one which ARC has mastered.