Hook-and-loop sanding disc 125 mm — from the manufacturer

Why 125 mm is the standard for random orbital sanders

Most DIY and professional random orbital sanders — Bosch PEX and GEX 125, Makita BO5041, DeWalt DWE6423, Metabo SXE 425 — have a 125 mm pad with 8 dust-extraction holes. NovoAbrasive 125 mm hook-and-loop discs come in two versions: with 8 holes in this pattern, so dust goes into the dust bag and the abrasive does not clog, and without holes — for pads without extraction and hand blocks.

Hook-and-loop backing lets you change grit in seconds without keys or clamps, and the paper backing with aluminium oxide gives an even, uniform finish on wood, filler and paint coatings.

How to choose grit size

Rule: never skip more than one grit — scratches from coarse grain will not come out with a finer one and will show through the paint.

For which materials

Wood and MDF. From rough levelling at P60–P80 to a P180–P240 finish under lacquer or oil; on end grain and knots go one step coarser.

Filler and plasterboard. P100–P120 for cleaning up, P180–P240 before painting; always with dust extraction — gypsum dust clogs the abrasive fastest.

Metal. Removing rust and old coatings at P40–P80, matting before primer at P180–P240. For heavy metal removal use fibre or flap discs.

Lacquer, paint, plastic. P240–P320 for sanding between coats and matting: work without pressure and at low speed so as not to melt the coating.

Technical specifications

Tips for use

• Align the disc holes with the pad holes — then dust extraction works and the abrasive lasts several times longer.
• Switch the sander on while it is already pressed to the surface and guide it without pressure — the weight of the tool is enough.
• Brush dust off the pad hooks: a clogged hook-and-loop pad does not hold the disc and it flies off at speed.
• A clogged disc can be partly restored with an abrasive cleaning stick; if it is shiny, it is time to change it.