Benjo
KRAZY KIWI
I just picked up a 1'' hole saw and was wondering if i need to use coolant or something like that when i am using it?
Hole saw
- Thread starter Benjo
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Doc Sprocket
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Cutting oil is never a bad thing. Keep your speed low, and don't force it.
Kaptain Krunch
Pro Junk Collector
Its going to be impossible without a drill press, slow rpm (less than 300 i believe).
Benjo
KRAZY KIWI
I'v got a drill press, slowest speed is 350 rpm. Does it have to be cutting oil, can i just use dirty/used engine oil?
Doc Sprocket
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350rpm isn't bad for 1" in (assuming) mild steel. Dirty engine oil may ignite. Spend a few bucks and get cutting oil, you'll extend the saw's life by far. And it's not impossible without a drill press, I've done it many, many times. Heckuva lot easier and more accurate, though. Safer, too. If the saw grabs, and it probably will on breakthrough, a handheld drill could break your wrist... I used to do 1 1/4" holesaw cuts daily.
Benjo
KRAZY KIWI
Thanks for the advice, i guess i'll have to spend some $$ and get the right stuff.
Kaptain Krunch
Pro Junk Collector
350 is fine, engine oil isnt the best but i have used it in a pinch before. Cutting fluid is best, but using water is alright too, just dry everything off after.
309antonios
New member
I use PB Blaster when using the hole saws of various sizes. I'm never cutting through something very thick though.
dpaxson
New member
make sure you spin it slowly. i tried to use a big hole saw that was meant for like 150rpm on my drill press at home which only goes down to like 800 rpm and i burnt off all the teeth.
devino246
Official DIYGK Chem Nerd
What brand and size of hole saw are u using? Ive got a 1 1/4in lenox saw that i use for a tubing notcher, i never use coolant and the teeth still look new.
KieranM
Doin It!!
Its always good to use coolant as you probably all ready know. The teeth may show no sign of wear but the heat may cause them to warp and over time brake.
Kaptain Krunch
Pro Junk Collector
At the shop, when were not doing like 20 notches in a row we dont use coolant, the teeth down even get warm. Its running at the recommended rpm though.
devino246
Official DIYGK Chem Nerd
Its rare for me to use it more than 3 or 4 times in a row.
Benjo
KRAZY KIWI
Its a 1'' BLU-MOL
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