timesaver strap on boss

[DaleRCL]

Hi Chaps,

I need to cut out a 64mm hole in a timesaver down pipe to fit a strap on boss. I have the boss etc I just need some advice on drilling out the hole. I have a bosch bi metal holesaw which I have previously used to cut holes in structural steel joists. See link below.

http://www.google.co.uk/imgres?q=bo...&tbnw=166&start=0&ndsp=21&ved=1t:429,r:12,s:0

Has anyone tried this with this holesaw and has it worked? Any advice appreciated.

Thanks

 

[ChrisOxford]

Plastic downpipe? In which case you're laughing, just make sure you use a very low speed, e.g. a cordless drill on its lowest gear and with just enough pressure on the trigger to do the job. Presume your holesaw has a pilot drill centrally?

Cast iron is a different matter, of course!

 

[DeltaT2]

The biometal holesaw should do the trick, but if not stitch drill around the marked area you want to cut out and use a sharp cold chisel & lump hammer.

 

[kevplumb]

bi metal yer scotch twonk

 

[DaleRCL]

The downpipe is timesaver, made of metal. See link

http://www.google.co.uk/imgres?q=ti...tbnw=90&start=20&ndsp=22&ved=1t:429,r:18,s:20

 

[DeltaT2]

bi metal yer scotch twonk

Bi metal or bisexual, whatever lights yer candle luv!!
You know what Kev, I think I've drank that much Single Malt I've turned into Scotch. Pass on my regards to your wife/sister...........