Timleech Posted December 24, 2014 Report Share Posted December 24, 2014 (edited) Solid fuel stove exhausts are often acidic, and this will one way or another encourage corrosion. Cast iron is much more resistant to corrosion than is mild steel. I've seen some horrible messes of welded collars, and they are harder to replace. Tim Edited December 24, 2014 by Timleech Link to comment Share on other sites More sharing options...
NMEA Posted December 24, 2014 Report Share Posted December 24, 2014 (edited) Sorry, but water is not a lubricant for cutting tools, cutting pastes, oils or emulsions are, if you use them you'll probably get 10 times the life out of the tooling. Water will do didly sqit except keep it cold. Water will indeed both lubricate and cool, especially in sufficient quantity, good enough for rock drilling, it's advantage over cutting fluids (which I also use in apropriate conditions) is that you can use it freely even if the vessel is in the water, something you could not easily do with cutting fluid, also it's free. Edited December 24, 2014 by NMEA Link to comment Share on other sites More sharing options...
ditchcrawler Posted December 24, 2014 Report Share Posted December 24, 2014 I can picture it now, kneeling there with his 240 volt electric drill in hand, shoving like billio against the hole cutter on the steel while some splashes a 1" hose about to get plenty of water on the job to keep the steel and cutter cool with just the odd splash to keep the drill cool. I once saw a chap using an electric sander with wet and dry in it on his cabin side standing on the gunwale while his missus played a hose on the paintwork/ paper in Braunston Marina. Don't think this one was brass Link to comment Share on other sites More sharing options...
NMEA Posted December 24, 2014 Report Share Posted December 24, 2014 Do people still use corded power tools drills around boats, not me, in fact I don't own any except workshop stuff. Also it helps if you don't use an idiot but rather somebody with enough sense to gently trickle the water down over the cutting site. Actually the thing I normally use is a weed sprayer with the spray nozzle removed, I cut exhaust and drainage skin fitting holes on a regular basis using the method. Link to comment Share on other sites More sharing options...
blackrose Posted December 25, 2014 Report Share Posted December 25, 2014 (edited) Solid fuel stove exhausts are often acidic, and this will one way or another encourage corrosion. Cast iron is much more resistant to corrosion than is mild steel. I've seen some horrible messes of welded collars, and they are harder to replace. Tim I've had a welded in mild steel collar on my roof for 10 years. No signs of deep corrosion on it yet, just light surface rust. Edited December 25, 2014 by blackrose Link to comment Share on other sites More sharing options...
blackrose Posted December 25, 2014 Report Share Posted December 25, 2014 Do people still use corded power tools drills around boats, not me, in fact I don't own any except workshop stuff. Yes, I still have some corded power tools on my boat (alongside my Dewalt battery drill), including a couple of corded sanders, an angle grinder a multitool and another corded drill. But then I don't have a workshop. Link to comment Share on other sites More sharing options...
Neil Smith Posted December 25, 2014 Author Report Share Posted December 25, 2014 I have a full set of starrett tank cutters from 19mm up to 127mm, I did have a 152mm but lent it but cant remember who to, I use them with cutting oil and they last ages even in stainless if you go very slow, you can also get water soluble fluid that turns milky, I use them with a cordless drill no problem. Neil Link to comment Share on other sites More sharing options...
Timleech Posted December 25, 2014 Report Share Posted December 25, 2014 Do people still use corded power tools drills around boats, not me, in fact I don't own any except workshop stuff. Also it helps if you don't use an idiot but rather somebody with enough sense to gently trickle the water down over the cutting site. Actually the thing I normally use is a weed sprayer with the spray nozzle removed, I cut exhaust and drainage skin fitting holes on a regular basis using the method. Yes, definitely. Cordless tools have improved hugely over the last few years, so that they sometimes really can be almost as good as the corded equivalent as well as being more convenient although usually much more expensive. They can't yet compete for sustained sawing or grinding operations though. My cordless jigsaw is very good, but with its battery it's a big heavy lump compared with its corded cousin. Tim Link to comment Share on other sites More sharing options...
ditchcrawler Posted December 25, 2014 Report Share Posted December 25, 2014 I have a full set of starrett tank cutters from 19mm up to 127mm, I did have a 152mm but lent it but cant remember who to, I use them with cutting oil and they last ages even in stainless if you go very slow, you can also get water soluble fluid that turns milky, I use them with a cordless drill no problem. Neil I use Rocol when cutting holes in steel Link to comment Share on other sites More sharing options...
DHutch Posted December 26, 2014 Report Share Posted December 26, 2014 Rocal is good. All our skin fittings are the brass type, placed well above the water line compared to most, if not all over 10inchs up, as compromised to allow self draining. In 20 years we have only knocked one off, but where greatful it was neither on the waterline, nor impossible to get to to replace. Daniel Link to comment Share on other sites More sharing options...
onionbargee Posted December 26, 2014 Report Share Posted December 26, 2014 Water will indeed both lubricate and cool, especially in sufficient quantity, good enough for rock drilling, it's advantage over cutting fluids (which I also use in apropriate conditions) is that you can use it freely even if the vessel is in the water, something you could not easily do with cutting fluid, also it's free. You only need a dip in cutting paste, rocol or similar, for a hole saw or drill. It won't pollute the water. I've never heard of plain water being used by any engineering practice for drilling mild steel. Soluble oil, yes. Plus your tooling is then wet, and will rust unless you oil it before you put it away anyway . Link to comment Share on other sites More sharing options...
smileypete Posted December 26, 2014 Report Share Posted December 26, 2014 (edited) Agree that water isn't really a lubricant, just a coolant, But having said that it's probably OK in a pinch for what NMEA does, what really dulls a cutting edge quickly is excess heat. I won't share my unorthodox way of drilling stainless sheet with a cheapo bit. cheers, Pete. ~smpt~ Edited December 26, 2014 by smileypete Link to comment Share on other sites More sharing options...
Guest Posted December 26, 2014 Report Share Posted December 26, 2014 (edited) In the absence of proper cutting fluid, milk works for hole cutters in m/steel. Done it a few times when stuck. Never tried water, but suspect milk is better.WD40 or similar is OKish. Edited December 26, 2014 by Guest Link to comment Share on other sites More sharing options...
onionbargee Posted December 26, 2014 Report Share Posted December 26, 2014 Milk is 90% water. Link to comment Share on other sites More sharing options...
Timleech Posted December 26, 2014 Report Share Posted December 26, 2014 Milk is 90% water. So is soluble oil coolant. It's the 10% which makes the difference. I've seen milk recommended for machining copper, which can be a pig to machine, never tried it as I don't fancy the smell when it goes off. Tim Link to comment Share on other sites More sharing options...
smileypete Posted December 26, 2014 Report Share Posted December 26, 2014 In the absence of proper cutting fluid, milk works for hole cutters in m/steel. Done it a few times when stuck. Never tried water, but suspect milk is better. Full fat, semi, or skimmed (ugh!) Milk is 90% water. Really? cheers, Pete. ~smpt~ Link to comment Share on other sites More sharing options...
magnetman Posted December 27, 2014 Report Share Posted December 27, 2014 I think the whole milk idea is udderly ridiculous. Link to comment Share on other sites More sharing options...
Robbo Posted December 27, 2014 Report Share Posted December 27, 2014 I think the whole milk idea is udderly ridiculous. Tastes better than semi tho. Link to comment Share on other sites More sharing options...
onionbargee Posted December 27, 2014 Report Share Posted December 27, 2014 But there's nothing in milk that's a cutting lubricant is there ? Except the fat, and the fact its a little thicker than water. Link to comment Share on other sites More sharing options...
Timleech Posted December 27, 2014 Report Share Posted December 27, 2014 But there's nothing in milk that's a cutting lubricant is there ? Except the fat, and the fact its a little thicker than water. From 'Machinery's Handbook', 1914, along with a host of other period recommendations for cutting lubricants:- "Milk is generally considered the best lubricant for machining copper. A mixture of lard oil and turpentine is also used for copper. " https://archive.org/stream/cuttinglubricant00newyrich/cuttinglubricant00newyrich_djvu.txt Tim Link to comment Share on other sites More sharing options...
Neil Smith Posted December 27, 2014 Author Report Share Posted December 27, 2014 Beer is 90% water so cant we use that. Neil Link to comment Share on other sites More sharing options...
magnetman Posted December 27, 2014 Report Share Posted December 27, 2014 Only 90% ? WD40? Link to comment Share on other sites More sharing options...
Timleech Posted December 27, 2014 Report Share Posted December 27, 2014 Only 90% ? WD40? WD40 is OK for cutting aluminium. Tim Link to comment Share on other sites More sharing options...
ditchcrawler Posted December 27, 2014 Report Share Posted December 27, 2014 (edited) We use to use Russian Tallow for cutting threads on steel conduit. Edited December 27, 2014 by ditchcrawler Link to comment Share on other sites More sharing options...
onionbargee Posted December 27, 2014 Report Share Posted December 27, 2014 From 'Machinery's Handbook', 1914, along with a host of other period recommendations for cutting lubricants:- "Milk is generally considered the best lubricant for machining copper. A mixture of lard oil and turpentine is also used for copper. " https://archive.org/stream/cuttinglubricant00newyrich/cuttinglubricant00newyrich_djvu.txt Tim Well every days a learning day, though a lathe chip tray full of rancid milk doesn't appeal much. Link to comment Share on other sites More sharing options...
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