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Machine Saw

This topic has 9 replies, 6 voices, and was last updated 1 November 2015 at 10:08 by Ian S C.

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29 October 2015 at 16:56 #209741
Alan Jackson
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@alanjackson47790
I have just given my old machine saw a well deserved clean up. I made it years ago and it has done great service. I use a worm driven Parvalux motor fitted between the pivot supports. The tapered jaws on the vice firmly hold down the cut material. It can clamp smaller sections by introducing a large diameter in the jaws so that the jaws can clamp. I have added some more pics in my album.

Alan
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29 October 2015 at 16:56 #38319
Alan Jackson
Participant
@alanjackson47790
Small home made machine saw
29 October 2015 at 17:03 #209743
Brian Wood
Participant
@brianwood45127
That's a nice job Alan, I especially like the inclined jaws, was the idea yours or imported?

Regards

Brian
29 October 2015 at 17:12 #209744
Alan Jackson
Participant
@alanjackson47790
Hi Brian,

Thank you for your kind comments. Yes the inclined vice jaws was my own idea and it has worked out well.

Alan
29 October 2015 at 22:07 #209799
Michael Gilligan
Participant
@michaelgilligan61133
That's very neat, Alan … I like the mechanically tidy installation of the worm-geared motor.

40 years on; I doubt if you would want to write it up, but a 'photo essay' with a few detail shots would be nice to see in MEW.

MichaelG.
30 October 2015 at 18:23 #209933
oldvelo
Participant
@oldvelo
Hi Alan

Great job of the power hacksaw for a home shop this is the probably best example of of a sturdy and well thought out machines I have seen for its rugged.simplicity

Having a fascination for power hacksaw from seeing one in operation as a kid in the dark ages. and seen many variations.

A couple of questions out of curiosity looking at the photo does the crank turn clockwise or anti clockwise.

Does it cut with teeth toward or away from the motor.

Eric
31 October 2015 at 10:17 #210015
Alan Jackson
Participant
@alanjackson47790
Hi Eric,

Thank you for your generous comments. The motor can be run in either direction and the blade can be mounted either way round but I have found that it seems to work best with the crank rotating anti-clockwise with the blade cutting on the return stroke. This keeps the blade in tension and the crank seems to pull the blade into contact with the cut metal. This was not my first attempt at making this saw. At first I tried to make a geared down rotary blade cut off saw. It sort of worked but was just not rigid enough and chattered terribly. You maybe able to see some circular cut grooves in the base channel. So I accepted defeat and rebuilt it as you see it now.

Alan
31 October 2015 at 12:19 #210034
Mick Henshall
Participant
@mickhenshall99321
Here is a couple of pics of mine,also a parvaleux geared motor giving 50 strokes pm,uses an ordinary hacksaw blade cutting on the back stroke, done good service chopping so far up to 2"bms takes its time but saves a lot of backache
31 October 2015 at 12:26 #210035
Mick Henshall
Participant
@mickhenshall99321
Also uses a car fuel pump to deliver soogy which doesn't always perform (the pump that is)but a splodge of cutting oil works pretty well

Mick
1 November 2015 at 10:08 #210139
Ian S C
Participant
@iansc
Just been cleaning my little hacksaw today, and giving it a bit of work to do. It has a Junior Hacksaw blade, and is powered by a hot air engine. At best cutting speed it runs at 80 strokes per minute/ engine about 900rpm. 10 mm dia rebar takes up to 1/2 an hour, must find some softer stuff. That's a 4" nail in the saw photo

Ian S C
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