Same 100 mm grinder, different grit: how choosing the wrong flap disc grain wastes the whole pass
Images and product details come from third-party platforms and belong to their respective owners. They are shown for reference only.
This is a Taobao store based in mainland China. If your shipping address is outside mainland China, please confirm with the seller whether international shipping is available before purchasing.
Affiliate link — we may earn a commission at no extra cost to you.
About this product
Flap discs for a 100 mm angle grinder come in different grits, and the grit decides what the disc does: coarse grains cut fast and leave deep scratches, fine grains remove little material but leave a surface you can finish from. If you buy one disc and expect it to do both, you spend twice the time: a coarse disc will never give you a painted-ready surface, and a fine disc will burn through discs trying to take off a weld bead. The thickened backing on this one is aimed at longer life under pressure, which matters on steel plate rather than light touch-up work. Two things to settle before ordering: which grit or grit set the listing actually ships, and the maximum RPM printed on the disc, which must be at least your grinder's no-load speed. Always wear goggles and a dust mask.
Product images
Pros & cons
Pros
- One disc covers grinding and blending in a single pass instead of two tool changes
- Thickened backing holds up under steady pressure on steel plate
- Fits any 100 mm angle grinder with an M10 or M14 spindle pad
- Sold in bulk at a price that suits consumable use
Cons
- Grit and pack quantity are not stated in the listing, confirm before ordering
- The printed max RPM must be at least your grinder's no-load speed; check both
- Coarse grit leaves deep scratches that need a finer disc afterwards
- Flap discs wear out; plan on buying them as consumables, not one-offs
