Where can I buy a rasp cutter Specially for milling polysterene

[daveverrall]

cheers.. do they hold up well?

have you cut ply with them?

I buy from Ricicnc.com. I've just received an order from them for 8,12,16mm radius endmills all with a custom shank reductions. I dont have the invoice for those to hand but I bought a pair of R6 HSS ball endmills from them in 2018, deetz below. Three weeks from order for delivery. Couldnt find anyone in the UK to match.
D12XR6X150X200 4T foam mill bits, unit price $21, Qty 2, carriage $34, total $76

[marbles]

I wouldnt use them on plywood. I only use these on EPS and PIR foam at 12mm diameter and 200mm long they would just snap cutting plywood. Yes they do hold up well i've have several keep sharp for ages but i've also snapped a few just by taking too deep a cut with too large a stepover into PIR (like100mm pass at 80% stepover)