Trevanion
Greatest Of All Time
MikeJhn":1esgv0gy said:I don't know about being worthless, but my set has tapped cast iron, stainless steel and sundry other metals without any problems.
Cast iron doesn't present too much of a challenge, it's like tapping cheese! :lol:
Stainless, however, is quite tough going and my original cheap Aldi set could tap a couple of holes in stainless but the instant bite rather than bearing down on it while turning the tap trying to get it to start, the ease of cut, smoothness of the actual threads and the accuracy of the HSS Presto taps makes them 10x better comparatively. Threads that were tapped with the Aldi set were a lot looser of a fit than the ones that the Presto taps cut.
I think if you buy the whole range of Presto HSS taps + dies from M3 to M12 it works out at about £150, which isn't cheap granted and that excludes a couple of tap wrenches and a die stocks so in all it would work out about £200 for a full set (Excluding BSW dies and taps! :lol. Worth every penny for myself because I do quite a lot of threaded holes and I bought them as I needed them, but for someone who's doing the odd hole and cleaning up threads those cheapy Chinese sets would suffice.