Sieg g1 power hacksaw

Hi, I have just aquired this power hacksaw and I don't have the manual for it, I've quickly read the online version and I can't find any information on altering the stroke length as someone has told me that it needs to be increased, any help or advice would be much appreciated.

Manual here, but not a lot of info  https://www.axminster.co.uk/media/downloads/200024_manual.pdf

Edited By Stuart Bridger on 03/07/2019 22:23:07

Edited By Stuart Bridger on 03/07/2019 22:24:30

Ring them? Seems easiest and they should know.

One could ask Ketan at Arceuro, since he was the one to introduce them to the UK, but I don't think he sells them any more.

Hi Tony, according to the specs of the Arc Euro Trade one, the blade stroke is 70mm, stroke speed is 82/min, max cutting diameter 130mm. As far as I'm aware there is no adjustment for speed or stroke, and looking at the exploded diagram in Stuarts link, I don't se how it can be possible. If you wanted a power hacksaw with an adjustable stroke, you would be paying a lot more money than this model cost when it was new. I don't know of one that has an adjustable stroke, but there are some machines where the vice can be adjustable so that the unworn part of the blade can be used on smaller material, but they are often only on industrial machines.

Regards Nick.

Don't think you could increase the stroke any more as 70 +130 + 70 is about all the blade will allow before you crash the frame into the max size work as the total blade length is 300mm.

For sawing smaller stuff it would be nice to have a longer stroke but I don't think you will be able to do much if anything to modify this machine as there is not a lot to play with on the guide length even if you could put an extra hole further out on the eccentric.

I have an old "Donkey" saw, most likely pre war. I just use bits of 1" or 1 1/2" bright mild to pack the job out to even up the blade wear.

Jason has it. Stroke / blade length / work capacity relationship is typical for power hacksaws.

That's a nice looking machine with a lot of capacity for its size.

I find blade wear isn't an issue with my Rapidor but putting the blade in the right way round is important. Cuts towards the fixed vice jaw! Probably be worth scheming out some sort of lifter device to take the pressure off on the return stroke. This would almost certainly greatly increase blade life and, probably, improve the cut. Bound to be something on the internet to copy or take inspiration from.

Do make a solid setting device to adjust the fixed jaw dead square to the actual cut. Hard to get closer than a couple of degrees with the existing type of scale. My fixed jaw Rapidor is square to a thou or three per inch with a sharp blade. No reason why yours shouldn't be of similar performance. Obvious way is a tight fitting block in the slot the moving jaw slides in with a carefully adjusted blade to set the fixed jaw against. I'd probably make the blade double sided with the other side at 45°, or another useful to you angle you. So nice not to have to mess around correcting things for weld-it-up jobs.

Clive

I don’t know of one that has an adjustable stroke

The ‘Edgar T’ plans (kits supplied by hemingway and others(?)) are for a small bench-top machine which can be adjusted for stroke. Not that I imagine that many would make any adjustment after putting in use.

But those plans are for a blade of only 10”. Same rotational/ reciprocal speed, but the variable surface cutting speed might be useful for some material/blade combinations? Easier to go three phase and VFD these days?

The only adjustment that I see on that machine is the depth of cut before it contacts the off on switch. The speed of cut is on the high side, I would like it nearer , or below 100 strokes per min, instead of the 170 that it has, could be a bit hard on blades.

Ian S C

Edited By Ian S C on 04/07/2019 12:31:10

Thanks for the replies, I only asked as when I posted a video on the myford Facebook page someone said that the stroke needed increasing and after looking at the online manual it didn't seem possible but thought I'd better check here.

Hi Tony, I guess you were sawing something off square in your video. As the stated capacity has a max of 130mm, the someone probably didn't take into account is that if you were sawing a piece of 130mm off at 45 degrees, it would need almost 254mm of blade length with a 70mm stroke. 254mm would be about the max you could obtain while leaving a safe clearance of the saw frame at each end of the stroke.

Regards Nick.

For that cut it's the frame, and blade that needs lengthening, not the stroke, you would be best with a 14" machine for that.

Ian S C