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Do Beam Torque Wrench's Actually Work? How Accurate Are They? OEM Torque Wrench Tested
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- เผยแพร่เมื่อ 27 ก.ค. 2024
- I have always wondered how accurate a beam torque wrench really is.
Bought a brand new one from AutoZone for $14.99, link is below.
www.autozone.com/wrenches-pli...
Always wondered if those things were accurate or not. Looks like they are accurate enough for most jobs. Thanks for putting together the video.
No problem, thanks!
Sturtevant beam wrenches are accurate to 2 percent. Far more accurate than a clicker or split-beam clicker.
I use a deflecting beam to check the torque settings on gearbox shafts. It's ideal for that job because I need a visual as I rotate it many times. A click is no good because the value is unknown till it clicks , and also because it takes slightly more (sometimes a lot more) torque to get the shaft moving initially....because for the preload in the tapered roller bearings. Thanks for the video upload 👍👍👍
Checking the preload is defiantly a good use for a deflecting beam, No problem!
To better demonstrate I would use another camera at the same time just pointing at the Beam Torque wrench scale.
I would like to see the test done with an original and best Beam Torque wrench, Sturtevant Richmont Flat and Tapered Beam Torque wrench.
The Beam Torque wrench was developed by Walter Percy Chrysler and built by Sturtevant Richmont in Illinois U. S. A. from day one. This company also invented the first clicker type torque wrench, the first Torque screwdriver and many other important Torque tools and Torque testers. Just for the record!
Thank you man, appreciate the video
No problem 👍
great vid and info bro
Thanks!
I'd use one of those to do the head bolts on my junk sub 100 hp econo shitbox.
Amazing consistency to free hand technique at odd angle!!
If you want to be more accurate, place small piece of copper wire right at the needed torque value - once your indicator needle touches wire you know you are bang on ;)
There was a guy who added a small LED light so every time indicator needle touched copper wire it switched the LED on - good for confined spaces.
Most important lesson - accuracy is maintained for years without any form of calibration. This alone makes is superior in comparison to other "modern" torque wrenches. How many garages, forget DIY hobbyists, run periodic calibrations on their torque wrenches?
Interesting idea with the wire and LED! Yeah that's the biggest drawback to these, sometimes you're not right over the scale.
Yep these just seem to keep their accuracy, unlike micrometer styles.
Most garages have tool trucks that show up to them, on the truck they normally have a tester like this. So if a tech want to check his torque wrench.
@@Tools-Tested Here in UK calibration starts at £80. If you on your own in a small garage, you go by "feel". No one wants to spend money on 3 wrenches twice a year, £80 each. And if you are a hobbyist, it is very unlikely you would ever test and calibrate your torque wrench. So it is much better to use $25 +/- 5% beam torque wrench with 20 years no-calibration lifespan then $100 click one which would be off the scale after first year.
People just don't look after their tools.
@@ryteulopki8069 I don't think thats a good analysis of the pros and cons at all to be honest.
If you are a hobbyist then I doubt your torque wrench would magically go out of calibration while sitting on the shelf or only occasionaly being used.
All you are committing yourself to is 20yrs of wasted time using an inferior tool.
@@elliotkane4443 If you own click-style torque wrench just test it yourself using pull-scale (remember about leaver sensitivity!). You will see that even well stored click style will loose its accuracy over the time. How do we know it? Well, as a member of small hobby-garage who re-built few engines... we have twisted few bolts, we also have few of them come loose after time. So we have decided to learn how to DIY click style torque wrench calibration and quickly learned that none of our wrenches was accurate. Some of them were 20% off!! Even few of more expensive tools were off +5% after 1st year of service!! And most of brand new wrenches were off by 3% right at the start, fresh out of the box!
We now test our wrenches every 6 months and if any doubt we use "lever+pull scale" to accurately torque most critical bolts - you cannot argue with physics ;) Force time distance brings accuracy guaranteed by nature! Not most practical solution but extremely accurate. And if you need to torque some odd bolts with specs outside your tool range, like +500Nm or larger... or 5Nm and smaller, then you just go for longer/shorter beam and use your pull scale.
Pull scales are also easy to test as it is quite easy to accurately measure volume of water (volume, temperature etc - just google it), or use known weights, or use multiple scales (shop, warehouse, airport... there is a lot tested, certified scales to come by). And these days even cheapest electronic luggage 50kg scales from ebay offer
I would like to see the Taiwan gauge done flipped over. The gauge could be negative the other way indicating the plate with the ft-lbs is mispositioned. Maybe also you could pull up and check the other side of the scale. If they are both over then it is the spring .
I just looked at my wrench and it is made in Taiwan and about 30 years old. It is not on zero but is at 10 ft-lbs. I am going to test this thing with a 50 pound weight to see if it is correct. I might just have to subtract 10 from the readings.
I grew up working in my father's garage using his beam-type torque wrench. The biggest problem is reading the dial while pulling hard on the handle. Sometimes it was necessary to enlist another person to help.
Yep very accurate but can be tricky to read and torque at the same time.
Interesting to see them tested in this manner, not seen this style on a digital test bed before. Like you say, probably good enough for some applications but given that you can pickup relatively cheap micrometer style torque wrenches, they probably would't be popular for professional or experienced DIY
Yep I agree, you can get a decent click type for not much more. Which makes it a lot easier to get the proper torque. I’m am surprised they actually semi work though.
Old original ways still work well enough.
When you need precision and low torque pick a beam. When all you need is accuracy pick a more traditional torque wrench. This is pretty much expected and the precision aspect comes down to the skill of the user... because the beam is always going to flex the same amount every time with no deviation. Maybe over time there might be some drift from the weakened spring effect. But not by enough to care especially when precision is more important.
Yup. I use a Park beam on scootercycles
What about the machine being set at zero with the weight of the tool on it?
Shouldn't it be zeroed first, then the tool plugged in?
Very nice and appreciative video.
In upcoming videos. Could you compare the XL 1/2 kobalt ratchet to the XL 1/2 Carlyle ratchet.
It might be about a month, but your talking Kobalt 85875 and carlyle CHT R12LFQR ?
@@Tools-Tested it is the 25 inch Carlyle ratchet and the 24 inch kobalt ratchet. I forget the model numbers.
I have one and I'm sure it's accurate enough for my purposes but I use my click style because it's often difficult to see the gauge on the beam style.
Yep accurate but trick to use.
I use an old Craftsman beam-type on occasion. They are actually more difficult to use in real-life on a bolt that is not stationary (like the torque measurement tester is).
Yep that's the only drawback. Accurate and cheap but hard to use accurately.
Now you know the real values of the OEM, just stick a note to it to remind you to make adjustments. Or maybe print a new label over it.
The irony of using a digital torque gauge to test a beam torque wrench
Thx for the video! What torque wrench do you recommend for bicycles?
I have only tested torquing screwdrivers that low. I will be testing Fix It Sticks this weekend which could be a good option depending on how they test. Because of how compact the kit is.
Im going to test kits designed for bikes but thats probably going to be in a few months.
Thanks!
I have seen these test done on the cheap Taiwan and Chinese clicker torque wrenches, and they came out with ever worst results. I have some older Craftsman beam type torque wrenches that I have had over 40 years and never use. My biggest complaint about using them was they had a shiny background on the scale, and you would get a glare so it would make it hard to read.
Yep I can definitely see that being hard to use because of the glare.
I think there is something wrong in this test. Even without you putting force on the handle, there should be some torque reading on the tester, since the wrench itself has mass to it and therefore is producing some torque on the tester. But the reading always starts at zero.
Not with this tester/wrench, beam wrench's are very light. Also this tester has a working range of 25-250ft lbs, so its not very accurate under 25. The weight of the wrench would probably register on the 1/4 and maybe 3/8 tester because of the lower working range.
You turn *left* during the 1000 cycles?
A mystery revealed!
I was just going to test it with a bucket of water and a string 😂
Defiantly an option, lot cheaper vs this tester.
How accurate are the Pittsburgh torque wrenches?
Putting the finishing touches on a video testing the Pittsburgh compared to 10 other torque wrenches.
Video should be out tomorrow
@@Tools-Tested thank you I will be looking for it
Please check Australian made WB torque wrench
Very hard to find in the US, I did end up testing a knock off "powerbuilt" in video th-cam.com/video/vSO-cdpEdKg/w-d-xo.html
How much
what does "cycle" mean in this context ?
I do an initial audit then physical move the wrench 1000 time to 50% of max scale, then audit again.
I skipped through the 10 minutes of beeping, notwithstanding, interesting video
I appreciate the video, but I'm concerned about the testing rigor. It seems like a camera centered over the scale should have been used to test these tools. Your position changed which introduces a natural small error in the reading angles. Also I'd think you'd want to mute the tester and hide the screen from yourself so you can be sure that you're not introducing any additional error.
I've used an SK beam since the early seventies. Built many a 500 hp + engine. The trick is consistency . A head bolt that "specs" 65 can be 61 or 72...as long as they're all equal. Oil on the bolt or no ? LOL
Yeah its down right comical people think they need a digital torque wrench to do engine work now.
When you technically can achieve better accuracy with a beam style. Yep its all about consistancy.
Both showed to be highly repeatable and were close enough for 99% of the jobs most people would use them for.
10:29, Are they accurate enough for the price? There is no such a thing when it comes to a precision instrument and the duty of a Torque wrench is a precision instrument!
Is it accurate or is it not? I wouldn't take that Asian tool if you give me for free.
That old Craftsman does better than I would even hope so. It is more reliable and accurate than other types of mechanical Torque wrenches like clicker type. The only negative side is, that it is hard to monitor a scale in most situations. Craftsman is king.
I can only imagine how good are those made by Sturtevant Richmont. They are very expensive but worth every penny.