Thread: Bought a power hacksaw - requires a motor

100 sounds right.
1/2HP is plenty.
The small power hacksaw we have at the mens shed is only 1/3 HP and it has no trouble cutting stuff.

Andrew you could always run it off steam or peddle power

I have a small ALDI old belt sander motor here if your interested I'll check I am sure it 1/4 hp 3000 rpm maybe less.

I have a similar saw that looks to be based on the same design.
IMG_0064.jpg

3/4 HP with 2" motor pulley.

Originally Posted by wheelinround

I have a small ALDI old belt sander motor here if your interested I'll check I am sure it 1/4 hp 3000 rpm maybe less.

Thank you for the offer, but 3000 RPM is a bit over twice what I need

Originally Posted by droog

I have a similar saw that looks to be based on the same design.
IMG_0064.jpg

3/4 HP with 2" motor pulley.

That does look quite similar. I might play it safe and go with 3/4.

Originally Posted by Andrew C

Thank you for the offer, but 3000 RPM is a bit over twice what I need

Good job I didn't offer you the 8000 rpm one then ............it would cut the time to seconds

I have a 1420rpm single phase (4P) motor, 3/4 HP from an old drill press if that is any help.

Michael

Originally Posted by Andrew C

I picked up a Peerless power hacksaw the other day. It is without a motor.

What horsepower motor is required? I wouldn't have thought more than 1/2 or 3/4 HP would be required.

The motor (with unknown pulley size) drives a 7" pulley. This is coupled to a 2" pulley driving an 8" pulley. If my understanding of pulley arrangements is correct, then a 1400 RPM motor fitted with a 2" pulley should result in a final speed of 100 RPM, or 50 cutting strokes per minute:

( 1400 RPM x 2" x 2" ) / (7" x 8") = 100.

Does this sound correct?

I have the same saw , I have used it a quite a lot , I think they were made in Ballarat . Mine is mounted on lengths of railway track which makes it very stable , they tend to jump around if they are not mounted on something heavy . Mine is a tad too fast , I think 70 to 80 would be better rather than 100 strokes per minute . I replaced the shafts and made some bushes as it was a very worn out machine when I got it . I think mine is a 1/2hp motor . Mike

If I remember correctly, a washing machine motor works well on them, and they're dirt cheap too.
Kryn

Originally Posted by morrisman

I have the same saw , I have used it a quite a lot , I think they were made in Ballarat . Mine is mounted on lengths of railway track which makes it very stable , they tend to jump around if they are not mounted on something heavy . Mine is a tad too fast , I think 70 to 80 would be better rather than 100 strokes per minute . I replaced the shafts and made some bushes as it was a very worn out machine when I got it . I think mine is a 1/2hp motor . Mike

Thanks for that. I think a 1.5" pulley would drop the speed to ~75 strokes. Thanks also for letting me know about the jumping about. I was planning to put it on casters, but I won't now. I'll just have to deadlift it when I want to use it

Are you able to tell me whether the motor rotates clockwise or anticlockwise if you are facing the motor from the spindle side?

Originally Posted by Michael G

I have a 1420rpm single phase (4P) motor, 3/4 HP from an old drill press if that is any help.

Thank you. That might indeed be a big help, if Mike (morrisman) can confirm the spindle rotation for me. What would you like for it?

Originally Posted by Andrew C

Thanks for that. I think a 1.5" pulley would drop the speed to ~75 strokes. Thanks also for letting me know about the jumping about. I was planning to put it on casters, but I won't now. I'll just have to deadlift it when I want to use it

Are you able to tell me whether the motor rotates clockwise or anticlockwise if you are facing the motor from the spindle side?

At the mens shed we have ours on lockable wheels and it is a hoot watching it slowly wobble its way across the floor when a member forgets to lock the wheels. Every time i see it do this it reminds me of a minimalist 70's dancer, you know the ones that stand in one place and just jiggle about a bit. I should rake a movie of it and add some appropriate music.

Originally Posted by Andrew C

Thank you. That might indeed be a big help, if Mike (morrisman) can confirm the spindle rotation for me. What would you like for it?

It's sitting gathering dust. What's it worth to you? $40? $400? I would not have a clue.
PM me with a phone number and we can talk.

Michael

Rotation wouldn't matter surely just remember to put the blade in the right way round.

What about an old spin dryer motor. No don't have one.