haza Posted November 4, 2018 Report Share Posted November 4, 2018 mister needs to drill an hole as sink is being moved .are there better tank cutters then others ..silly thing to ask ,but there you go , Link to comment Share on other sites More sharing options...
sharpness Posted November 4, 2018 Report Share Posted November 4, 2018 How big a hole & through what? Link to comment Share on other sites More sharing options...
rusty69 Posted November 4, 2018 Report Share Posted November 4, 2018 Last one i got erbauer wasn't very good on cast iron. The Sandvik (now bahco) one before was much better, but that was on 4 mm mild steel. Slow drill speed and oil used. Link to comment Share on other sites More sharing options...
MtB Posted November 4, 2018 Report Share Posted November 4, 2018 7 minutes ago, rusty69 said: Last one i got erbauer wasn't very good on cast iron Serves you right for buying the cheapest one in the shop! Erbauer is the Trabant of the cutting tool world. Link to comment Share on other sites More sharing options...
rusty69 Posted November 4, 2018 Report Share Posted November 4, 2018 Just now, Mike the Boilerman said: Serves you right for buying the cheapest one in the shop! Erbauer is the Trabant of the cutting tool world. True. I only wanted it for two holes for the squirrel backboiler. It barely made it through the second one before it went in the bin. Link to comment Share on other sites More sharing options...
ditchcrawler Posted November 4, 2018 Report Share Posted November 4, 2018 Just now, Mike the Boilerman said: Serves you right for buying the cheapest one in the shop! Erbauer is the Trabant of the cutting tool world. I know of worse than that Link to comment Share on other sites More sharing options...
rusty69 Posted November 4, 2018 Report Share Posted November 4, 2018 (edited) 2 minutes ago, ditchcrawler said: I know of worse than that Shirley thats for wooden type metal Eta. Oops assumed ops mister was drilling hole in steel for new skin fitting.... My bad, as they say. Edited November 4, 2018 by rusty69 Link to comment Share on other sites More sharing options...
MtB Posted November 4, 2018 Report Share Posted November 4, 2018 2 minutes ago, ditchcrawler said: I know of worse than that If you RTFM those are for wood... Link to comment Share on other sites More sharing options...
haza Posted November 4, 2018 Author Report Share Posted November 4, 2018 sorry for steel about an inch or so ..i will know more tomorrow but thanks for the info Link to comment Share on other sites More sharing options...
rusty69 Posted November 4, 2018 Report Share Posted November 4, 2018 An inch is quite a bit. (so i tell my mrs anyway) 1 Link to comment Share on other sites More sharing options...
springy Posted November 4, 2018 Report Share Posted November 4, 2018 I've used mostly Starrett Bi-metal & found them to be pretty good, but as rusty said slow speed & lubrication. springy Link to comment Share on other sites More sharing options...
haza Posted November 4, 2018 Author Report Share Posted November 4, 2018 what ever the waste pipe size it thats what its got to be ,but what di i now lol Link to comment Share on other sites More sharing options...
system 4-50 Posted November 5, 2018 Report Share Posted November 5, 2018 another vote for Starrett. Link to comment Share on other sites More sharing options...
Boater Sam Posted November 5, 2018 Report Share Posted November 5, 2018 New Starrett hole saw, oil, slowly, with constant pressure is the way. Cast iron cuts well but you must keep it cutting from the word go, once you polish the bottom of the hole it stops cutting. I drill a small hole on the cutting circle first, gives it a fresh edge to pick up on. 2 Link to comment Share on other sites More sharing options...
WotEver Posted November 5, 2018 Report Share Posted November 5, 2018 4 minutes ago, Boater Sam said: I drill a small hole on the cutting circle first, gives it a fresh edge to pick up on. Excellent tip sir. Link to comment Share on other sites More sharing options...
rusty69 Posted November 5, 2018 Report Share Posted November 5, 2018 7 minutes ago, Boater Sam said: Cast iron cuts well but you must keep it cutting from the word go, once you polish the bottom of the hole it stops cutting. I reckon that's what happened to me.(plus a cheap hole saw) Link to comment Share on other sites More sharing options...
Boater Sam Posted November 5, 2018 Report Share Posted November 5, 2018 (edited) 31 minutes ago, WotEver said: Excellent tip sir. Aye, an engineering apprenticeship does help if I can still remember! Thanks for the greenie. Edited November 5, 2018 by Boater Sam added more Link to comment Share on other sites More sharing options...
Bazza954 Posted November 5, 2018 Report Share Posted November 5, 2018 Starrett hole saws are best . (not the cheapest ) If you are drilling cast iron do not use cutting compound or oil, it's best drilled without and at slow speed, the cutting compound /oil just turns the cast iron swarf into a paste which blunts the cutter in no time at all. 1 Link to comment Share on other sites More sharing options...
Boater Sam Posted November 5, 2018 Report Share Posted November 5, 2018 Sorry, correct, forgot to mention the self lubricating property of high carbon steels such as cast iron. Not to be confused with cast steel which can be a swine to cut. Link to comment Share on other sites More sharing options...
John Hartley Posted November 5, 2018 Report Share Posted November 5, 2018 A series of small interconnecting holes drilled inside the circumference required and a very good half round file, lots of time and energy saves buying a hole cutter. Either a cheap or expensive one. It also helps with a diet if your on one. Lots of calories burnt.? Link to comment Share on other sites More sharing options...
WotEver Posted November 5, 2018 Report Share Posted November 5, 2018 1 hour ago, John Hartley said: Lots of calories burnt. And lots of holes in the palm of your hand from the tang because you couldn’t be bothered to go find a handle... 1 Link to comment Share on other sites More sharing options...
Machpoint005 Posted November 5, 2018 Report Share Posted November 5, 2018 17 minutes ago, WotEver said: And lots of holes in the palm of your hand from the tang because you couldn’t be bothered to go find a handle... Can you even buy a file without a handle these days? 1 Link to comment Share on other sites More sharing options...
tree monkey Posted November 5, 2018 Report Share Posted November 5, 2018 2 minutes ago, Machpoint005 said: Can you even buy a file without a handle these days? Yup, easily although I'm talking round and flat files for chainsaw sharpening 21 minutes ago, WotEver said: And lots of holes in the palm of your hand from the tang because you couldn’t be bothered to go find a handle... I thought that was just me, I also used to have fingers covered in small scars from chainsaw sharpening because I always forget my gloves 1 Link to comment Share on other sites More sharing options...
Machpoint005 Posted November 5, 2018 Report Share Posted November 5, 2018 Just now, tree monkey said: Yup, easily although I'm talking round and flat files for chainsaw sharpening I thought that was just me, I also used to have fingers covered in small scars from chainsaw sharpening because I always forget my gloves Just so long as you haven't got large scars all over your legs from when you forgot your ballistic trousers! Link to comment Share on other sites More sharing options...
tree monkey Posted November 5, 2018 Report Share Posted November 5, 2018 1 minute ago, Machpoint005 said: Just so long as you haven't got large scars all over your legs from when you forgot your ballistic trousers! Not that daft, although I have been grateful for steeltoe boots once or twice Link to comment Share on other sites More sharing options...
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