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11th Jan 2020, 04:32 PM #1
What can I use as a cutting fluid.
I need to cut 10 of the 16, 22 & 32mm holes into 3mm SHS using annular cutting bits and the only business in our small town that sell this kind of cutting oil is completely out.
I'd like to do this job tomorrow and am wondering what other products could I use to help the annular cutting bits last longer.
Cutting Bits .jpg
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11th Jan 2020, 04:42 PM #2Diamond Member
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I wouldn't even bother if you are only cutting into 3mm thickness.
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11th Jan 2020, 04:43 PM #3Diamond Member
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Just use some cutting compound such as trefolex if you must.
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11th Jan 2020, 05:42 PM #4Most Valued Member
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We use ordinary coolant mixed with water for our annular cutters, when the machine is being used upside down on 3-4mm RHS we don't use any as it won't flow upside down and can't be bothered putting on a longer tube. If you'r really worried about it, use some CRC/WD40 and the likes, or as ComVC puts it any cutting compound will do.
You'll probably find that it won't get hot enough to be of any major concern, on that thickness anyway.
KrynTo grow old is mandatory, growing up is optional.
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11th Jan 2020, 06:30 PM #5
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11th Jan 2020, 06:53 PM #6Philomath in training
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I cut some 2.5mm thick RHS today with a 16mm version and it was fine dry. If you want to be nice to it, I would suggest some WD40 or similar in a spray bottle / can.
Michael
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12th Jan 2020, 09:32 PM #7Senior Member
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I'd just use ordinary engine oil.
Is that bad?
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12th Jan 2020, 10:52 PM #8Senior Member
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13th Jan 2020, 01:53 AM #9
Hi Guys,
The idea behind using something like lard is that it melts easily and is sticky, so it tends to cling to a surface. Adding sulphur or similar improves the lubricating properties. Temaxol is of this ilk !Best Regards:
Baron J.
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13th Jan 2020, 08:11 AM #10Most Valued Member
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In a former life I did add/move/change work on communication towers. Used to drill a lot of 18 and 26mm holes (M16 and M24 bolts) for splice plates, guy take offs and mounting corsets in everything from 8mm angle iron to 30mm plate, all were drilled dry. Didn’t seem to make much difference to cutter life if we used fluid or not, and not using it meant one less thing to take up.
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13th Jan 2020, 10:26 AM #11Golden Member
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- Gippsland Victoria
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Cutting Oils
I've had the impression for a while now that the subject of cutting oil for us hobbyists is a bit like oils for the lathes ways.
ie. Any oil is better than no oil. I've used cheap olive oil from Woollies at times on my lathe.
In Sparey's book he talks about using whale oil, other old books talk about using lard as suggested in a post above, somewhere else I found somebody's recipe for stuff he called "angels breath" (= 1 part turps : 2 parts white spirit : 3 parts olive oil) I've seen people recommending Automatic Transmission Fluid in other forums.
....... and yes before somebody jumps in, I'm sure that scientifically formulated manufactured cutting oil could be best of all, but if you've gotta do it now and don't have any Tap Magic or Trefolex or Rocol or Venom or Whateverite in the shed then its fine to try some of whatever is available in the "car fluids box" or in the kitchen cupboard.
Bill
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