cast iron drilling

[supermario0]

is it possible to bore a hole in a cast iron downpipe using bi-metal holecutters 57mm ? I was told it was possible but after spending several hours and several holecutters I am starting to think otherwise lol any help or advice would be much appreciated

 

[craigy]

The hole utters needed to get through cast iron are expensive, the ones you have chewed up are prob bi metal from merchants costing £10-15? Forget it, those are good for tin and light alloys only. Try calling a company called diatech ask for mark. Tell him diameter of hole needed and thickness of cast iron. Those ones you have get chewed on ferrous metals. What I would do is say the down pipe needs replacing to put a boss on and you have yourself more work

 

[kirkgas]

Stihll saw and timesaver branch, job done, 15min

 

[craigy]

Like that kirk, timesaver branch? Is that your term or a real product?

 

[tamz]

Timesaver
Timesaver Soil | Above Ground Drainage | Saint-Gobain PAM UK

A real plumber should know how to cut a hole in a cast stack with a hammer and chisel :wink:

 

[craigy]

Nice, thanks for that. Or a sledgehammer?

 

[Mike Jackson]

Entirely possible with a bi metal holesaw. Slow speed and plenty of cutting oil (Temaxol). I've done it many a time. As soon as you get impatient and speed up the hole saw over heats and blunts.

 

[Geyser]

I've used normal hole saw worked fine even on a cordless. As said, nice and slow.