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.
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.
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.
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.
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 :)
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.
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 :(
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.
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.
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.
Hi... very nice cuts you are making there. How fast is the crank rpm??? That looks too much speed but i see it works great. I'have seen many older ones but they are really really really slow movement.
Plans would be great. I know I would be interested. How bout making it out of castings and do a full series on building it? You know, get the plans, see how its cast and watch how its machined. Just a thought, know I would learn a great deal.
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
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? :)
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?
Also,, I have three antique real ones. Real ones because all of them raise the blade for the back stroke, Pretty smart those guys were,,,, Yours works faster and back in the day they did not have such good blades.
hello, this teacher, I congratulate you for passing the great knowledge you have and teach others how to do things, I want to ask if there is a possibility that I can sell the plans to make this cutter saw the meeting as very practical , if so I would appreciate what the cost indicated and as you get in conatcto to acquire them. also wanted to ask how it is that makes video molds metal casting number 10, the blue are plaster or wood? and if I could make a video on how to please and makes them.
Sure I could build one of those but then what would my metal cutting band saw do? Besides the band saw is always cutting instead of spending half of it's time going backwards,,,,,,, A very nice heavy duty one on it's own table was forty bucks at a swap meet. It needed a $4.95 bearing replaced that took less than 15 minutes to do. In that time I also re-greased it's gear box.
+^5 on the plans. I have a benchtop saw right now with a universal motor and I hate it, noisy and no weight on the overarm, so you have to stand there and push it down. Also the vise sucks. This looks much more servicable
it's the same blade throughout and it went on to cut more afterward. Blade wear is not an issue. The large metal took a couple of hours. It's not the sort of thing you would regularly cut I just wanted to show the capability.
Hi, what is required in the way of tools? Lathe capacity? Is a mill needed? I really like it, I could have use for it even I dont have a large lathe ( I have a Taig).
I for one would definitely appreciate plans. I have the Gingery book "Build a Power Hacksaw" But that one seems a little much, compared to what I can see in yours..Thank You
great saw! One question: how many rpm does the wheel that's powering the blade make? I've got a motor her with a pully system, and can get about 500 rpm, but I think that's still too much? thanks and keep up te good work!
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
please tell me you'd let me have detailed info as to parts needed etc to make this with simple tools. I love this idea just need info to better start the search and get one in the works.
myfordboy How big does the lathe need to be?While I own one it is very small. What is the approximate cost of materials for the machine? Just need to have an idea of how much to set aside for the hacksaw budget after the £10 for plans.
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.
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.
Is there someone who doesn't want one? I doubt it.
Great machine.
i can honestly say this is better than a angle grinder especially on that super thick stuff. you could sell these at a good enough price
What a neat little mechanical saw, I’ll have to keep a lookout for one of those for our workshop.
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.
This saw already has an auto cut off but thank you for the suggestion. The switch is located on top of the body and the saw frame activates it.
Very cool
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.
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.
Mine was fitted as the make-shift power plant for a suffolk lawn mower! It was full of grass cuttings when I got it....
Nice powered hacksaw. I can't imagine doing metal work without one of these or a horizontal bandsaw.
That's awesome. I love making my own power tools and I like how your hacksaw turned out. Nice work and I hope that you have great luck with it.
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 :)
loving how accurate the cuts look
I like the clock ticking in the background. Nice saw.
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.
Looks very similar to the little Kennedy Hexacut under the bench in my workshop.
Kudos to you sir! A fine piece of equipment you've made there for sure.
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 :(
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.
Mine has an adjustable stroke. Sometimes it needs reducing to suit larger material.
Looks like a KENNEDY power hacksaw. Good work done!
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.
very nice! how often do you need to change the blades? have you tried to put lube on that?
This is a well designed tool - well worth buying the plans
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.
@HomeDistiller I haven't found it necessary to provide blade relife on the backstroke. It works fine without it. A Good quality blade lasts ages.
nice saw! how often do you need to change the blades? after how many hours or cuts?
We had a Saw like this at work but unfortunately it ended up in the skip because of the swinging arm. Well done i like it.
I used to use a similar design machine, but would always have oil flowing into the cut. Did you not add the oil for clarity sake for the video?
I find on steel the saw cuts better without oil. I do use oil on aluminium as it prevents clogging the teeth.
Was that slice of barstock cut at 15 thou or did you do any grinding? That's some pretty damned accurate cutting if you ask me.
Is the round dowel steel cut in thin slices so you can get free vending machine food?
No it doesn't but it is not a problem with blade wear or anything.
¿no se calienta ? ¿no utiliza refrigerante? ¿de que metal esta hecha esa hoja de sierra?
@spinesales Blades last well about the same as in handsaw.
Hi... very nice cuts you are making there. How fast is the crank rpm??? That looks too much speed but i see it works great. I'have seen many older ones but they are really really really slow movement.
It is faster than the regular ones, about 230 rpm. Sounds fast, but as you say, works a treat.
you mean that's much easier than doing it by hand? How many gallons of electricity that takes?
It depends on the size of the saw. I have a max stroke of about 2.7"
nice machine. how many kW motor are you using?
Very nice! I have one of those superb "hoover" motors running my lathe.
Plans would be great. I know I would be interested. How bout making it out of castings and do a full series on building it? You know, get the plans, see how its cast and watch how its machined. Just a thought, know I would learn a great deal.
Nice Saw. Have you experimented with different speeds for ultimate cutting of different materials?
@ionsunteu It already has this feature. The swich is located on the body under the swinging arm.
It's 1/3 HP, about 240 watts. I used this because I already had it. 1/4 HP would be plenty.
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
That was of course the reason I asked... I have long thought of throwing one of these together, but wasn't sure what to do about the return stroke.
@novoltny Motor is standard 1425rpm. With the belt reduction cranshaft speed is 210rpm.
Great bit of kit mate. Only thing I would change is the vice jaw hight, to hold 4inch + pipe?
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? :)
That's the very epitome of work smarter and not harder.
possibly, i dont know what i really want yet but what do ya want for em and what type of tools to make it
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?
Just one reduction. Details here myfordboy.blogspot.co.uk/p/compact-power-hacksaw.html
cool machine. but to my mind for safety reasons the on/off switch is a little bit too close to the moving parts. i would relocate them if possible...
Also,,
I have three antique real ones.
Real ones because all of them raise the blade for the back stroke,
Pretty smart those guys were,,,,
Yours works faster and back in the day they did not have such good blades.
@RobRichmondRPG Hacksaws often have a dashpot device for this but I haven't found it necessary. Blades last well and little heat is produced.
That is really nice! I would also like a copy of the plans for such a slick tool! Great video as always. Thank you!
hello, this teacher, I congratulate you for passing the great knowledge you have and teach others how to do things, I want to ask if there is a possibility that I can sell the plans to make this cutter saw the meeting as very practical , if so I would appreciate what the cost indicated and as you get in conatcto to acquire them. also wanted to ask how it is that makes video molds metal casting number 10, the blue are plaster or wood? and if I could make a video on how to please and makes them.
Sure I could build one of those but then what would my metal cutting band saw do?
Besides the band saw is always cutting instead of spending half of it's time going backwards,,,,,,, A very nice heavy duty one on it's own table was forty bucks at a swap meet.
It needed a $4.95 bearing replaced that took less than 15 minutes to do.
In that time I also re-greased it's gear box.
nice ! now to add a small coolant pump . improves cutting times a blade life :) i've got a lovely wicksteed version of your saw ,
what would you say a all around good stroke might be, thanks for info by the way
This is just toooo cool! very good work i`d love to make one....
Impressive how thin it was able to slice that bar. I might weld something like this with my everlast. What weight did you use for yours?
It was just an odd bit of steel bar I had.
pretty cool...I like how square it cuts.
+^5 on the plans. I have a benchtop saw right now with a universal motor and I hate it, noisy and no weight on the overarm, so you have to stand there and push it down. Also the vise sucks. This looks much more servicable
Отлично 👍
Very nice well done.
PS +1 if poroldchap brought you here!
Do you use flat belt or V-belt in transmission? High gear ratio suggests flat belt am I right?
Verrrrrry nice!
Why don'y you cool the blade?
does it lift on the draw?? or run back on the teeth?
would love some plans as that is a great little machine
@valveman12 I haven't found this necessary it cuts well in all materials.
Blade coolant will really help
Reminds me of an old log saw, awesome!
My wife wants me to get the plans...she wants to add a different tool and use it while I'm at work. Is this a wise thing?
Im curious, how long did it take to get through that 3 x 5 steel and how many blades did you go through?
Thanks for sharing this.
it's the same blade throughout and it went on to cut more afterward. Blade wear is not an issue.
The large metal took a couple of hours. It's not the sort of thing you would regularly cut I just wanted to show the capability.
+myfordboy I understand, that why I was curious how long it took. never seen anyone do that before.
Great invention, downsides are you are only using one part of the blade and it spins to fast for steel cutting.
Yeah . . ..look at it struggle
Hi, what is required in the way of tools? Lathe capacity? Is a mill needed? I really like it, I could have use for it even I dont have a large lathe ( I have a Taig).
The parts would be too large to make on a Teag lathe. The large pulley for example is 6" diameter.
@@myfordboy Thanks for a prompt reply. Is milling required?
You could file the parts but it's easier to mill them flat.
@erezra Not necessary. Little heat is produced.
Awesome, Yes plans would be great
What tools are needed for the manufacturing of this project as I don't have a welder?
2:35 ouch !!! my toes. beautiful machine i'm going to build one.
I for one would definitely appreciate plans. I have the Gingery book "Build a Power Hacksaw" But that one seems a little much, compared to what I can see in yours..Thank You
great saw! One question: how many rpm does the wheel that's powering the blade make? I've got a motor her with a pully system, and can get about 500 rpm, but I think that's still too much?
thanks and keep up te good work!
220
No, it does have auto switch off.
Very nice machine!
Thanks for sharing your job.
Grettings from Brasil
Luiz Ally
How long did it take to saw the 3 1/2 x4 inch thing? It's amazing for such a kind of a saw...
@deaftodd A good quality blade lasts for ages. It cuts better without lube.
Looks like a 3/4 HP Hoover motor. I have just too many motors and have one of those for sale.
Does the blade lift at all on the return stroke?
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
@Garretthierisser Not realy timed it as such but I would say they last about the same as they would in a hand saw.
Hey I whas thinking that maybe I could power the hacksaw with a jigsaw,... can you give me some advice on this?
Thanks in advance, greets.
how does the length of the stroke effect it i am kicking one around
That is a beautiful thing! How long does a blade last? Id be very interested in the plans.
i have a look but if you would i would still love to know a recommend stroke but if that disclose to much info i be fine, thanks
looks realy handy for use shade tree engineers i would love to see the plans
@astriknon The 15 thou slice is straight off the saw, no grinding!
@myfordboy Does it have a stop switch, to turn it off automaticaly when it is done cutting?
please tell me you'd let me have detailed info as to parts needed etc to make this with simple tools. I love this idea just need info to better start the search and get one in the works.
You will need a lathe to build the saw. There are more details here myfordboy.blogspot.co.uk/p/compact-power-hacksaw.html
myfordboy How big does the lathe need to be?While I own one it is very small.
What is the approximate cost of materials for the machine? Just need to have an idea of how much to set aside for the hacksaw budget after the £10 for plans.
@russtuff The large lump took over a hour but you can leave it unattended . I wouldn't want to cut that bit by hand!
@yakirgr Just the odd drop of oil on the slidebars.