Triple-Piston Pneumatic Circular Saw [Restoration]
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- เผยแพร่เมื่อ 8 ก.พ. 2025
- This restoration is on a 1920s Model B12 "Safety Saw" pneumatic circular saw made by the Ingersoll-Rand Co.. The "Safety Saw" name was in reference to the patented design of the retractable blade guard, one of the first of its kind. This saw runs off of a triple-piston "Little David" motor that Ingersoll-Rand seemed to use in a number of their larger pneumatic tools.
Unfortunately, I could not find any mention of this saw in the literature and therefore it is only an educated guess on how much compressed air this saw need to run.
The saw had many previous repairs that all needed some new attention. The main issue with this item was the completely seized throttle valve and the extra crusty and old grease that had hardened over time.
Once cleaned of grease, repaired, and reassembled the saw would idle when I applied a bit of compressed air from my air compressor which can only put out 90 psi @ 20cfm. The idling is either due to the low flow of air not providing enough force on some valve to completely seal it, or there is a leak somewhere within the saw. Either way, I decided not to fix that issue because an idling pneumatic circular saw sounds AMAZING and I could listen to it all day.
Despite the reduced air flow, the saw still cut just fine and definitely had tons of torque. I'll be sure to use this next time I need to cut a thick wood beam with the most ironically named tool I've restored.
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I launched a new perfect handle smaller screwdriver for sale on the website. Some might even say it's an actual usable size this time....www.handtoolrescue.com
Useful size? What is this heresy?
Давление побольше надо !
I purchased one as a present for my son. It's freaking awesome!!
I do so very much enjoy your restoration videos.
Thank you for posting
Bro, for how long have you had that Evaporust barrel? THat water look almost black like oil.
Easily one of my top five favorite triple-piston pneumatic circular saw restoration videos!
to ruin the joke
HOW MANY TRIPLE PISTON PNEUMATIC CIRCULAR SAW RESTORATION VIDEOS ARE THERE??!
@@dimitar4y at least one?
@@frogz 😂😂
Never thought it even existed
Naa !!! You need to be more specific. This is the B12 model which has been done to death. I've seen at least five better ones !!
Awesome! I remember seeing the Craigslist ad and thinking "HandTool Rescue needs this death machine, I mean this "Safety Saw", in his life." Great restoration, especially great job on that aluminum repair! And thanks for sharing the unique engineering of this dastardly thing with us, I love the triple piston arrangement, and the brilliant way they kept the size small by "overlapping" all of the connecting rods! I also just LOVE the personality that thing has, the way it idles. Brilliant :)
Thank you again for sending this my way! Couldn't have done it without you.
@@HandToolRescue literally!
Awesome. :)
Wow. That’s a generous gift, to all of us. Cheers.
Liz, I think I can say this without any worry of not speaking for any of the viewers of this channel, thank you, you let us see a piece of history!
These heavy duty pneumatic tools probably saw a lot of use in the mining industry. Many mines were not electrified, and usage of pneumatic tools would also reduce risk of sparks unlike electric motors. Also these pneumatic motors were light and compact for their power at the time. Drills and hammers were already using pneumatic air, so the piping and large compressors were there, and I think saws like this would come handy when timbering the mine. The standing pneumatic grinder you mentioned, lot of the larger mines had workshops down the levels, so running those workshop tools from the air line makes perfect sense too. Very interesting restoration as always!
There was probably more than a couple of job sites out in the bush that might have had a petrol powered compressor on site but no electricity hooked up yet this would have suited. Thinking with the right diamond wheel, enough water and no sense of self preservation it'd be bloody good for cutting marble
Oh! Good point! I wonder if the lack of sparks from a brushed electric motor is why it's a "Safety" saw.
@@wbfaulk No, safety because the guard is spring biased so that it dropping will not cut you, you need deliberate force to expose the blade from the guard.
Yes mines have a lot of pneumatic tools down shaft, all for safety, and no sparking, though a lot of them also have hydraulic tooling there as well, powered by water, as after all you do not need a compressor for them, merely the main shaft depth and that column of water. Dump the water to both cool the rock and keep dust down, and in any case you need to pump large volumes of dirty water out, so you have the sumps and pumps there, and as well that water often contains useful amounts of ore, so it also gets run through a centrifuge to get rock out, which then is treated like ore, and the rest is filtered and treated before discharge, though a lot also goes back down after that as clean process water.
Agreed. It's primary use is in mining. Compressed air was used not just for drilling but also underground winches - this saw would run on the same source of air.
i was told that air tools are also often used when you expect super long run times on the tools. they don't heat up or wear out like motor driven tools do, and they can often get a lot more torque. i have an air ratchet set meant for a racing pit crew, and they are torque monsters despite not being even rated for torqueing bolts
Your vocalizations were priceless when that spring bit you
I could feel the bleeding!
Just a friendly reminder to all ppl who enjoys reading that if you turn on closed captions, he’s spent some time detailing what’s happening on the screen. 🤙
Thanks!
I think it is "idling" because the removed corrosion in the trigger valve assembly has resulted in too much clearance and thus the valve is slightly leaking. I imagine if you plated the spool valve with electrolysis it might take up the lost clearance.
I think the idling sounds kind of cool. It would give you rhythm like a metronome if it was used in the field on repetitive cuts.
Chugga chugga.
@@paedahe4975 That's the pleasing beat of the extra safety overflowing. Those old tools had too much safety for their own good, that's all.
I wonder if there were o-rings on the control valve at one point
@@ericpaul4575 Prob too old for O-rings, if you notice, it's all Regular slotted screws, too old for Allens and Phillips too - My 1946 and earlier stull is all slots screws, no "Modern Headed" fasteners?
It's supposed to do that... I Walter Mitty designed it!
Awesome restoration as usual! Can't wait for the pneumatic quintupel piston oscillating cake frosting applicator, I think Milwaukee made one back in the 50's. My granddad had one, brought it in for a warranty repair back in 64. They said it should be ready by next week.
Tools made before the days of workplace safety are always so freaking cool!
Yeah, but once they taste blood, they want more!
At first I was a bit sceptical about this saw. But then it started idling, and the sound it makes when it's cutting, it's freaking AWESOME!
The sound of that "idle" is amazing!
I wouldn't think it's supposed to but way cooler.
I am amazed at how you can take this apart clean, restore, make repairs an then remember where they all go, as an Airforce Vet we had manuals that helped us, an you don't have, amazing job by an amazing guy.
I think he uses the videos to look back and see how everything was assembled, and that's how the channel got started in the first place!
THIS IS *MADNESS.* WHAT KIND OF OVERLY-GLORIOUS MACHINE IS THIS!?
The tools you restore will never cease to amaze me.
I've never noticed how much closed captions enhances watching these videos until just now.
I love this kind of shit. Getting to see old tools of the past restored and demonstrated how they were in their prime.
The fact that it idles like that makes it even cooler, it really chugs along nicely lol
I like that this was named a "safety saw". It's no wonder tools like this don't exist anymore. Where do you find these death traps? They're awesome!
Safety saw in that it both had a spring guard that kept the blade away from contact, and also you needed force to retract the guard, a big upgrade over the older ones which had only a cover to keep the chips from hitting you, and no other blade protection, basically a bare spinning wheel of death.
These saws were made for underground mines with methane or other explosive gasses.
I had a pneumatic chainsaw and a pneumatic arc welder that i used underground
@@anned8634 'Pneumatic arc welder' seems like it may be closing the barn door after the horses are out.
A viewer named Liz Matzelle saw it on Cragslist and sent it in.
@@anned8634 pneumatic arc welder???
I absolutely love that you use tools you've restored in previous videos.
He makes those old throw-back Screw drivers and wrenches and sells them - they only LOOK old- theyre brand new
Forbidden, Nutella looks good lol good video I like watching you take old tools and making them look brand new again and they probably work a lot better than they did when they were brand new.
As a child I always love taking things apart because I wanted to see how they worked. And I think this is what has led me to restoring tools and different things. To this day I'm still curious how everything works that I take apart. FABULOUS work on this restoration it works and looks wonderful !! 👍👍👍
I enjoy your content and your attention to detail very much. I would love a channel where you restore a vintage , classic automobile or truck.
Brilliant restoration for an awesome saw. The guys who earned their living with these tools deserve much respect. Best from the UK where the adjustable HTR spanner is now in use. Thank you.
I love it! I've never actually heard a tool go "tah-pock-ah-ta" before. That thing rates right up there with the swing saw as a scary whirling blade flesh-mangler.
You are a god damned national treasure. Someone should find a way to get you a platform of some kind where you could just make video content for all of us to marvel at and enjoy on a semi-regular basis.
This is a tool you seek out to own not because it is practical or better than your existing tools...but because of the amazing sounds it makes.
Holy Kadoodle HTR, cant believe your 90psi @20cfm wasn't enough for this Timber Beast, but then again the size of the 3 pistons was very impressive let alone the trick bearings. Great Job keeping it real with the restoration and repairs! Thanks Much for another @y@ Popping Rescue!
As a rule of thumb, an air motor needs 8hp driving the compressor for every 1hp delivered by the air motor. They are impressive in many respects, but efficient use of air is not one of them. A Mack truck air starter motor (vane type, very noisy, also made by Ingersoll Rand) uses about 750 cfm. Luckily it spins the engine so powerfully it only has to do it for a couple of seconds. So the air brake tanks, provided they haven't leaked down, will supply enough air. If not, Mack supplied hoses so you could couple up the tyres! Start the diesel engine, fill up the brake tank(s), then refill the tyres and you're off...
Turbine starters (eg Austart) are more efficient and quieter than vane type. But they still use a lot of air.
Watching a restoration and drinking afternoon tea. Nothing better.
Every time I see your restorations, it blows my mind how well made they are for when they were invented. My education has unfortunately taught me mainly the bad side of history so seeing these incredible creations gives me a more hopeful outlook.
This HAS to be the COOLEST project you have done to date, EVER !!! WoW !!! And that rhythm it has ...... Thanks for a great video! 👍
This thing is AMAZING I'm always in awe of the uniqueness of the items you find and restore!
Holy smokes that Circular saw is huge 😮 0:30 @Hand Tool Rescue
This is now one of my favorite restorations you have done. Really nice work. Thanks for the videos! Stay well.
I'll second that. Nice name, by the way.
That lower rod bearing configuration is incredible. I love it.
I love the quotes around "Safety Saw", if they had the winking emoji back then I think they would have added that as well.
Yeah, I thought the same thing. You look at the saw and think "that looks totally safe"
"Safety" Saw is probably more accurate.
Safety is relative.
i love the old heavy duty air tools. there is essentially an air tool version of every single moving tool you can think of, and they are usually pretty interesting
Got my perfect handle small screwdriver this week. Just the right size. Carry and use it everyday. Thanks.
I may have said this before, but seeing that intro and opening music with the clip, your face... It is better than drugs man, it brings a tear to my eye... I duuno why, is it because you remind me of a friend from a long ago, is it the nostalgic series opening from decades ago when times were better... You are a gift of God to mankind my friend...
P.s. a bloody nice saw... I was first thinking it would be a diesel 2 stroke, but when i saw the pneu valve trigger, i was not disappointed, as i didnt read the info... I see your vid, i like and fullscreen, then i read the desc... Either way, yeah, no wonder its got torque for days, that thing with a proper compressor and a 400 liter tank would be able to much through anything... Hell, this thing could only suffer from overheating of the main bearing, as from what i can hear, despite it cooling itself by air constantly, the idle speed increases slowly, which kinda points toward grease being heated up... The pistons and the walls should be getting cooled and contracted equally as one seems to be steel and other cast iron, so no differential shrink rate there, which only leaves the grease churning as the obvious source of heat, which doesnt seem to really be a great thing... I dont know anything about this saw, maybe it likes to warm up the grease and idle at higher speeds, but im not sure at which point of continuous duty does it want a break...
The craftsmanship and production value of the parts is incredible. I'm a timber fabricator and we byrn through a few plastic crappt drills every year. I can't help but think that's planned out when I see what kind of rigidity and skookum casing these older tools had.
I LOVE THIS THING!!!! WHAT A BEAST!!!! Oh I see now it's from the 1920's ..... I was gonna guess the 1930's but it's even more awesome that this monster was was around even earlier!!!
I've watched a couple of color and speed/frame-rate restored films from the 1920's (I can't remember the name of the channel, but they also add some sounds to it just to give you the atmosphere of where they were filmed) and seeing what was around back then it's hard to believe this was the high tech back then, AND that you managed to get it working with very little work (well... I mean very little work as in it was mostly cleaning with only a few small repairs)
GREAT JOB!!!!
Any mechanic does repairs, but only someone who has a love for tools does an excellent job like you. This is the best repair channel on all of TH-cam. Lots of information, very relaxing and you are so much fun too.
-How much air you need to run this?
-Yes
The noise of the saw motor, and the cutting blade, and the air compressor big enough to run it, makes this most ear-splitting power saw ever.
Your description of the smell of old, dried grease (Nutella) is so spot on. I can still remember the smell from working on ancient machines back in the day. The memory of the smell is somehow nostalgic... but... in all the wrong ways .
Love your videos btw :)
I find it unbearably funny that the word "Safety" is within the quotation marks of the nameplate lol.
Safety from that era is like flat earth now; a joke laughed at by most, but still believe in by a shocking amount, unlike flat earth, however, safety is reasonable.
Closed Caption is my favorite TH-cam option!!!
Thank you as always!
-CYC
Where you keep finding these rarities baffles me. Another great restoration
My month has been made now. Thank you for blessing the people once again
Love that idle. I'm keen to see it run at full pressure. Cool resto!
I cant tell if I prefer your rougher style of resto, or My Mechanic's perfect restos. I dont wanna choose, so im just gonna watch the both of ya lmao. Much love from Michigan!
The Angelic sounds and lighting when you smacked the saw blade with a hammer. Awesome.
I dont watch this channel to see the right tool used for the right job. I watch because its interesting to see how you are going to use what you have to make the rescue work out in the end. 🍻
I just love the iconic smile and how entertaining your videos are.
Well...Certainly a big saw. SICK restoration as always. GREAT WORK !!!!!!!!!!!!!!!!!!!!!!!!!
Another master restoration on an extraordinary hand tool. I would never get to see these tools if it wasn't for your channel, Eric. Cheers.
With how many saws and chainsaws you restored that didn't had a shred of safety features this feels like the safest thing you ever handled
Yours is an intro I never tire of watching. Makes me laugh every time. Reminds me of so many childhood 80s shows 😂
Love the idle of the tool.... Don't change it! Would love to see it work eith a proper flow of airv
I want to give a big shout out to the hand tool rescue wrench and flat blade screwdriver. I bought them because I thought they were a cool thing to use as a decoration with no real intention of using them. I have more expensive wrenches and screwdrivers that are my go to tools.
I have never owned a better made tool than these two. The wrench is amazing. When everything else was twisting out on a square head that thing held fast and saved an impossible to get part on a vintage car. I use it all the time. I will be ordering a couple more of them. On big screws the screw driver is great, it fits in my hand, does not slip. As I said these are well made tools that are far better than any other brand including snap on.
I don't know where you find these weird tools but I like it every time you restore one.
Очень понравился звук, с которым эта пила работает на холостом ходу!
Ни один современный инструмент, даже пневматический, не может похвастаться этим же!
The spool valve is evidently bypassing air, hence it "idles". You could make use of your lathe to make a new bushing and/or a new valve. Or just chalk it up to nostalgic charm and leave it be. I would choose the latter unless you want to put it to use. Keep up the awesome restorations. You're keeping the past alive and well. And thanks for sharing....
Really great camera work, and the resolution is amazing. Your aluminum weld repair was very impressive too; didn't think that was possible to weld it like that.
Asbestos gaskets, lead-based paints, radium dials... Working with old equipment shore is fun!
I love doing weld repairs on old aluminum castings like this one! Aluminum wheels area also pretty fun, then again, this old cripple really loves to weld lol. Gotta do something with my free time, when my wrecked back will allow.
I really like the humorous moments that surprise me while I focus on the work technique.
You already have two talents.
Humor and technical.
Big fan.
Who would have thought that a pneumatic three piston/cylinder saw would be a good idea? And than to look at how it was designed, manufactured and run is another amazing feat. And with all that stated, you find such a saw to refurbish is yet another amazing feat as well... Thumbs Up!
I tip my hat to you sir, you're one of the few people I've actually seen get an easy out to work!
I've never seen a hand tool like that before. Imagine that being operated by someone who had used one for 20 years back in the day. Scary tool. Great job.
I always hear angelic music in my head when any of your screwdrivers come into view it’s like the angels have risen and celebration is upon us for such a wonderful tool 🙏
I have been going through your back Vid's and in this one I noticed that a ring spanner would have helped with that errant finger flicker piece of spring lol. I love your work my friend.
I think my favorite part about this saw is the spring tension for the saw guard.
Like...yeah it's there and I guess technically you *could* achieve a depth setting other than full depth...but why do that? Full depth all the time! It is a Safety Saw after all, heck it's right there in the name!
Nice one! And you don't even hear the screaming saw blade, like on other circular saws... :)
A beast of a saw!
I love the hardware on it! The bolt heads on this saw are gorgeous!
Thanks for sharing 🇨🇦
Hiya Eric. It was here, then it was gone, now it's back. Glad the video is back.
As always, fantastic video. Very satisfying to watch you complete a restoration, especially with the CC on. Do you ever release any with a voice over? Like your own director's cut, kinda lol. Keep up the great work brother, 1M subs is closing in :)
Thanks! Yes, narrated videos are on Patreon.
@@HandToolRescue cool business model
That rotating assembly is so dang cool!
What a magnificent beast! Awesome video thank you. Pro tip: grind a small radius on the tip of your lathe cutting tool. It'll cut smoother with less torque.
I think your flame could have been a bit more neutral, but I get why you didn't want it to be so hot. Great job workin with what you got- I love seeing tools older than me get a new life.
When I saw the quick shot of the disassembled saw I could not make out where the saw finished and the background began. To many things on the go? I was hoping for a 300 year old Californian giant redwood to be whittled down for a toothpick. Awesome 'restoration' by the way. Thank you for everything.
Holy Crap! when you had removed the first bolt I was shocked how BIG the saw was! Great Video!
Without a doubt the strangest saw I have ever seen. Great job. Saludos desde Argentina.
One of your best Eric, fantastic subject to start with, I found myself watching twice; once for your "narrative" and once to see the form of this amazing thing. I will keep this in my achieve. The engineering is so unique and imaginative. You did credit to the character of this almost unbelievable tool with great workmanship.
When that was first made I am sure people were extremely impressed now those people would wowed with modern technology. Amazing work
Hello, bravo for your restoration, you always have curious objects. Bravo for your humorous videos. Greetings from the south of France
That is the coolest Ingersoll Rand Pneumatic Circular saw i have ever Seen cool tri piston Design 34:30 @Hand Tool Rescue
Every-time I see one of these restorations I can't imagine another one that good or interesting coming along. Great job. Makes me even more glad I came along after these kinds of tools were extinct. A sawyer would go deaf in a week after using this contraption.
So steampunk and over-dangerous. I definitely love this tool.
I felt that spring recoil in my SOUL lol.
Also, that first nut you had to properly bust free was a gods-damned miracle (coming from another denizen of the rust belt)
Very Nice job on that aluminum weld. Rare to see anyone do that these days, and as someone who also has been known to use the old tool instead of the right tool, it's not nearly as easy as you made it look!
That's crazy! We still use ingersoll & Rand electric torque drills in our shop! Didn't knew that company existed for that long!
It's very satisfying to see the old tools being beautifully finished.
You don’t know how excited I am when I see a new HTR video in my subscriptions. Such great work and you always make me laugh. Keep it up brother
I Love the tickover sound on that what a cool old tool!
Thank you for helping me appreciate modern tool design!
You have the sharpest drill bits on TH-cam
Damn we've come a long way. So much work put in restoring that thing! Something as simple as a blade guard. Someone had to think of it.
Love the restoration. That beast needs a plaque that says "I havent had lunch yet. TAG youre it". Thanks for another great video. 👍🏻
Lo mejor de la reparación.
El final con el trenecito...chin ,chin ,pun.
Hasta que acelerassss
Un saludo desde España.👍
That is the most wonderfully steampunk wicket saw I have ever seen... damn thing needs to be hooked up to a boiler from an old steam locomotive! What an actual beast!