Thread: Cold saw build

Ive not built one, but am in the market for a cold saw.

What type you going to base your unit on?

Probably either the wet cold saw type, which spin at around 40rpm or perhaps the Makita drop saw type, which I beleive spin considerably faster (1400rpm I think) and don't require coolant. I'll have to research them both a bit more.

Have built one.The worm and wheel are out of a truck brake slack adjuster.I think the blade can be up to 10 inch.Pic 5 shows the method I used to adjust the blade to cut
straight and square.No coolant on mine. Motor is 1 hp @1440 rpm. I think the blade
does about 80 revs.Needs more hp.
P.S. I haven't used it since I got a bandsaw and if you want a slack adjuster or two I
have plenty of free ones
John

Originally Posted by rascal

Pic 5

Seems I cant count

Hi John,

Great work , I'm sure I'll use the adjuster idea one of these days. Thanks

Stuart

Neither can I but it would have been pic 5 if I had posted the rest
John

Great bit of work there, what a rascall you are! I was thinking of using pulleys and V belts, but a couple of questions: How does the blade cope without coolant and the extra rpm? Is the second vice for the offcut necessary?

I have a home built one that my father made, I'll see if I can find it under the pile of cuttings and take a couple of pic's tomorrow for you tongleh, mine doesn't have coolant either, I just give it a squirt of oil on each side of the blade every few cut's.

I doubt that you would have success using a belt to drive the blade shaft because you need a fair bit of torque, belts would be very problematic.

John

I used a cheap blade which used to"catch" and a brobo that worked well.
I think the brobo had "set" on the teeth.Coolant/Lubricant probably would have helped.
Revs seemed ok to me and the vise just seemed like a good idea at the time.
John

Rascal,

What a great idea using the slack adjuster. Beats paying $1200 for a cheap cut off saw which may get used 10 times a year.

I assume you'd be able to get a truck brake slack adjuster from a truck wreckers, not familiar with them.
I think the number of pulleys (not to mention their size) and belts required to get the blade spinning slow enough might be a problem. I have seen motors with gearboxes and I know Hercus used to make a range of boxes. I have also just discovered another toothed cut off saw 'Rage', I might look into, after my experiences with Makita, I woudn't touch them with a 10' pole. More research I think.

tongleh here is the cold saw my old man made, he made his own gearbox including the worm and wheel, I can't read the plate on the motor but I think that it is 3hp.

That's awesome... until now I would never have thought about building one, but I suppose someone had to invent the thing... something else to add to the 'roundtoit' list...

Even if you had to buy a worm and gear I reckon it would be substantially cheaper than a Brobo.

Adding a suds pump wouldn't be that hard. For small jobs a gravity-fed overhead tank would be just fine and get rid of the pump altogether.

That is a serious saw
John

What a ripper, looks like a rotating table. If you ever want to get rid of it, I can help.