The Mirka Basecut 8 in PSA Sanding Disc P40 20-352-040 is an adhesive-backed sanding disc made for paper sanding applications where fast stock removal and solid disc life matter. This is a sanding disc designed for material removal in sanding applications using a pressure-sensitive adhesive attachment system. Model Number: 20-352-040. If you need a coarse adhesive disc that gets to work quickly without jumping straight into a premium-priced option, this one makes sense.

What matters here is the combination of a coarse P40 grit, an 8 inch disc size, and Mirka's Basecut positioning as an economical, high-efficiency abrasive. In plain terms, this disc is built to cut aggressively at the start, so you spend less time waiting for the abrasive to bite. That is useful when the job is more about removing material efficiently than chasing a fine finish.

The PSA backing is a practical detail, not just a catalog spec. If your sander or backup pad is set up for pressure-sensitive adhesive discs, this format gives you a direct, secure mount that stays planted during use. The liner helps protect the adhesive side before installation, which is important in a shop or jobsite environment where dust can ruin a good bond before the disc ever gets on the machine.

Mirka describes Basecut as an economical line with productivity and efficiency features, and that fits where this disc belongs. You are getting a paper sanding abrasive aimed at users who need respectable performance and a long working lifespan without overcomplicating the choice. For sanding operations that go through discs regularly, long life matters because every disc change is downtime.

This Mirka sanding disc is best suited to buyers who already know they need an 8 in PSA disc and want a coarse grit for heavier sanding steps. It is a straightforward fit for shops, maintenance departments, and serious DIY users who want dependable consumables from a known abrasive brand. If your process calls for aggressive sanding and your machine uses PSA paper, this is the kind of disc you keep on hand instead of scrambling for the right format when a rough-prep job lands on the bench.

Good call when you need coarse PSA discs without overpaying

The Mirka Basecut 8 in PSA Sanding Disc P40 20-352-040 is the kind of abrasive you buy when the priority is getting material off efficiently and keeping consumable cost under control.

• Who it's for: Users running 8 inch PSA sanding setups who need a coarse disc for heavier sanding and prep work.
• Why it stands out: You get aggressive initial cut, PSA convenience, and a longer working life from a proven abrasive brand.
• Worth knowing: This is a coarse P40 disc, so it is meant for early-stage sanding and removal work, not final finish passes.

• What type of attachment does this disc use? It uses a pressure-sensitive adhesive, or PSA, backing.
• What grit is this Mirka Basecut disc? This is a P40 grit disc, which is a coarse sanding option.
• How many discs come in the pack? The package quantity is 25 discs.
• Where is it made? Source data lists Finland as the country of origin.