Home made power hacksaw .Great addition to any workshop. I have plans for sale for this one. Email me at the address on the video for details or send me message via youtube. There are more details here myfordboy.blogspot.co.uk/p/com...
Blade life is excellent. To use the whole blade would mean a longer stroke which would result in a much larger machine. This is a compact bench top saw.
I agree. Though it has a short stroke, making it look fast, the cutting speed is low, and combined with bimetal, works well. On the cutting fluid, I found the same to be true with my horizontal bandsaw. Water soluble oil coolant inhibits the blade from cutting well and it clogs up my vise screw with sticky sludge and chips. I use it with no coolant, and have no issues with the blade heating up. Cutting oil with a quart of tap magic added might work awesome though, as it does in drilling.
This is such a nice machine! I now got a cold cutting chop saw which is much faster but not nearly as nice and enjoyable to watch as this saw but loud and a little intimidating :)
Although there is no arm lift on the return stroke blade life is not a problem. There is no more wear than if the blade were in a hand saw. I think the direction of the crank lifts the blade slghtly on the return.
I ordered and recieved the plans from David. Although I have not yet built it, the plans appear to be just like his videos - very well done. There are lots of explanations, pictures and links to videos that point out specifics. If you like his videos, you will like these plans.
Awesome machinery..Great solution, very economical. First: Hacksaw blade is cheaper than band saw blade. Second: Hacksaw blade is widely available. Third: Power consumption is lower than cut-off saw. It really helps if electricity in the household is limited to power 2HP motor maximum....Now I really want it :(
Despite what you belive I can confirm that ony one blade was used in this video. The same blade went on to cut many more bits of steel later. I am using Bi-metal HSS blades with no lubricant. Cutting fluid actualy reduces the saw's perfomance as the blade seems to slide over the work instead of cutting.
You are correct. I hand saw stuff like that big pieces and larger and it can take six or seven hours,even with a larger hunk of band saw blade in a meat cutters "hacksaw" I make a kerf on each side to reasonable stay in the middle though but my cuts still wander and the finish is too rough because the cuts don't meet exactly. People don't understand that if you DONT BREAK A TOOTH,and keep a fair amount of teeth in the cut,those blades can cut an amazing amount of material.
My father had a commercially made version of one of these. It looked ancient. The bow that held the blade was made of a casting that looked like a gigantic c-clamp. One feature it had that you may want to add to this one is a kill switch that would engage when the blade falls below the cutting plane. The reciprocating action would engage a lever at that point and it would switch the machine off. My favorite feature of that machine. As a cutoff tool, it was superior to the other ones we used (horizontal band saw, chop saw). He actually sold the band saw when he saw how well this worked. Never regretted it.
I think I could use a regular light switch. The arm would drop on the OFF side when it is through the material. I'll use tubing and bearings because I don't have that bar stock, and my coin jar for the weight.
Great saw! I built something similar about 20 years ago, but sold it when I bought a bandsaw. I've always wished I'd kept it. Mine was smaller and unlikely to have been as as accurate as yours. I'll have to do some digging and see if i still have the plans.
Hello! Thank you for videos, some tricks i dont know, for ex. pulley teeth cutting. P.S. How many saw blades you changed to make a cut on a final part of this video? :)
It's a nice build and well thought out, but the cheap Chinese bandsaws have a big capacity and are hard to beat. If you are hard up for space though and have the bits lying around, this would be a good project.
That is really brilliant. I was thinking about finding an old one and restoring it cuz I have a metal shop in my garage I got every piece of metal working machinery you can think of. And I really need something like this that's small. And then I thought hell I got Motors controllers gear reducers flywheels pulleys and what I don't have I can make. I should just build one! Question you just have the one gear reduction?
perhaps because of the rotation direction, the return stroke pulls the saw a bit up. Maybe this could be increased by attaching the arm on the saw frame a bit lower to that the return stroke pulls upwards and the cutting stroke pushes down
ok well i am thankful for the help. i look at your sight right now i was actually just sent to you by another tuber ......so in that case your plans must be good
