Just bought a set of Holesaws for a fiver ! yes, that's right, £5 including the drill arbor. it's got 5 different size holesaws in the box, and although I haven't measured them yet, pretty sure that includes a 120, a 92, an 80 and a 60. not bloody bad eh ? I'll try em out this week, and if they actually work....I'll buy some more and sell em onto yer....
Sizes update The sizes of the 5 holesaws in this kit are: 2.5" (64mm) 3" (76mm) 3.5" (89mm) 4" (102mm) 5" (127mm) Do you think these will be suitable for making blowholes of 80, 90 and 120 mm ? I know the holesaws they sell at Tekheads are not precisely 80, 90 or 120 - is the reason because you can't get em or you need a little clearance ?
They're not the same size as the fans, because with an 80mm fan, it is 80mm from edge to edge. You only want to cut a hole out the size of the blades which is a bit smaller.
Bought em from a hardware stall at a local market They probably are designed for wood...I have no idea about holesaws....do you reckon they'll cut through steel then ?
I suspect they will burn out and become blunt. You really need a holesaw designed for metal. Check out: http://slautech.com/slautech/news/index.php?action=st_display&id=140
What you need is to get friendly with a guy who has either a laser cutter or a plasma cutter or both then you can do some serious modding
