The last Bosch ones I bought, about a year back, had the SDS device on top, but when it was removed (vice and adjustable spanner) they accepted the two threaded bit with two pins of a Starrett mandrel like all the restThe newer bosch saws use a different type of mandrel, I found out the hard way! They call it the "power change" and give them credit they are easy to remove because they do not self tighten.
I have a few good metal toothed hole saws, they all have a limited life span, I have a verity of good quality TCT hole saws, I assume they must have a life span as well, I just have not found out what it is.It's a TCT holesaw. Most use the same arbor sets as conventional bimetal holesaws. They are a lot more expensive than HSS or bimetal and not all of them are good - I have a set of Faithfull ones and they aren't the best
As above, will need it to include 3 inch cutter.
I fancy having a decko at making this wheel - skip to 2 minutes 20 seconds
Will be using it in Bosch pillar drill pbd 40
Any advice much appreciated
I found that out after going back and buying the Bosch mandrel, it is quick and easy to change hole saws but the cynic in me thinks it is just a way to make you buy Bosch.The last Bosch ones I bought, about a year back, had the SDS device on top, but when it was removed (vice and adjustable spanner) they accepted the two threaded bit with two pins of a Starrett mandrel like all the rest
these ones can either thread all the way on to the arbor and not use the torque pins (holes and thread out of alignment), or have them slightly loose on the arbor thread and use the pins. The former makes it almost impossible to the saw off the arbor (as it self tightens as you cut) and the latter leaves a rubbish finish and oversize holes as they wobble slightly. Perhaps I got unlucky, but next time I'll just buy Starrett ones in the sizes I need individually.
With some tools having decent ones does make the job more pleasurable plus for some achievable, nothing worse than a cheap saw that cuts out of square or does not deliver repeatable cuts. I have always had issues with chissels and struggled whenever I used them, but since buying some decent ones it has made things a lot easier and given me far better results.you don't NEED super quality tools
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