Taps

[Arbalest]

I had a chance to try the M8 serial taps today and I can't say I'm convinced yet. The number 1 tap went in really well. As it does'nt remove much material it took much less effort and it centred into the prepared hole much better than a normal tap. The number 2 tap does'nt have enough of a lead ground on it IMO so took a lot more force and I was worried it may even cross thread. Ditto the number 3 tap but less so. Overall I must say I'm a bit disappointed but I'll see how I get on with some of the other sizes. If I had a tool and cutter grinder I'd maybe regrind the lead on the number 2 tap and try it again.