|Item Weight||1.95 pounds|
|Product Dimensions||13.2 x 2.5 x 2.1 inches|
|Item model number||641432|
|Item Package Quantity||1|
|Number of Handles||1|
Powerbuilt 641432 3/8" Drive Reversible Ratcheting Micrometer Torque Wrench, 25 to 250 in-lbs
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- Made to be the most reliable tools in the market today
- Tool solutions for most all situations
- Built to exceed tool standards
- Locking handle prevents accidental setting changes
- 25 to 250 in. lb range
- Includes storage case
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Powerbuilt's 3/8" Drive Reversible Ratcheting Micrometer Torque Wrench features a locking handle to prevent accidental setting changes, and a 25-250 in. lb range. Includes storage case.
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First off a little back ground I am in the military and one of my jobs is to test torque wrench and calibrate them. So I have access to a CDI torque tester, and work with torque wrenches as part of my job.
I saw this thing and thought eh for 50 dollars how good could it be. Then I read all the reviews and people kept saying how accurate it was since they compared it to a wrench they had at home, some were new others were not. I decided eh why not buy it and see just how accurate it is. If it works then I can have a tester at home and not need to bring in all my wrenches to check from time to time. If it doesn't amazon's return policy for defective items is very good.
When I got the unit it is much smaller than I was expecting. It does have a very nice blow molded case and adapter to put into a vise so it can be used to check your torque wrenches. Instructions are a little vague for example it doesn't tell you the difference between peak and trace settings. Which is one holds the peak torque value the other varies as torque is applied. Obviously you want to use the peak setting for checking the calibrations of the wrench, while using trace if you are using it as the torquing device. Also I didn't see it listed on Amazon's site but the range of the unit is 29.5lb-ft to 147.6lb-ft with an stated accuracy of +/- 2%
Well I took it to work and checked it on the lab tester and it is very accurate (at least the one I received). For the whole range it was about +/- 0.5 max, off of what the lab tester measured in most cases it was less. This was also true for counter clockwise direction, which is great news for Dodge guys that have left hand fasteners. Really the accuracy is better than the +/- 2% that AllTrade states. Also it is accurate below the 29.5lb-ft, when I tested it the unit started registering at about 3.4lb-ft and it was again with +/-0.2 of the lab tester, this is true of the high end I took the unit to an even 150lb-ft and it was on still. For standard testing though we only test the max of the wrench, 60% of range, and 20% of range. I did this and found that the bottom 20% of the max happens to be the 29.5lb-ft that the unit is rated at. So AllTrade is following standards when making this product.
I have only one thing to say about the unit, with it's usable range it really can't correctly calibrate a torque wrench. As I stated above to calibrate a torque wrench you have to check it at three points the Max, 60%, and 20%. Reason is springs are not a linear acting object. As you stretch or compress them the amount of force varies. So I have seen wrenches be good at max but fail in the mid 60% but be ok at the bottom range. All of my wrenches fall out of the range of the unit at some point. If it is my large 1/2 then it goes to 250lb-ft, if it is my smaller 3/8 it goes too low as it's bottom usable is 16lb-ft.
This though however is no reason to take anything away from this unit. For the home mechanic the ability to check at the mid range of a wrench is more than enough for the job since in the case of automobiles the torque values given are usually over a range. If one was worried they could set the unit for the exact torque then check their wrench for accuracy, but then you might as well just use the unit and torque the bolt. Unless you can't get the unit on with a breaker bar because the location of the bolt is too tight.
If you do not have a torque wrench simply by this and use it as it will be more than enough for the job. It will save you a ton of money and do 90% of the torque values you would need. If you already have a lot of torque wrenches then buy this to check them. I am very impressed with this unit and it will come in very handy for checking my wrenches at home, and for taking to a friend's garage instead of taking all my wrenches I only need to bring this one item. See the pictures I have uploaded showing the readings on the unit vs the lab tester.
I placed it in a vise to check my click torque wrench at 80 ft-lbs several times and it beeped steady (the click was either bang on or very close) in the range of 80 to 80.4 on the LCD. The lowest range is at 29 to 30 ft-lbs. I don't know if the device loses accuracy if you test at lower than 29 ft-lbs, but what the heck, I gave it a try anyway for fun. Checked my other torque wrenches at even lower ranges but you won't get the beep or light indicator. You just have to coordinate or time the click with the readout. I did this at 8 ft-lbs (several times) and it was bang on. I tried the beam type torque wrench at the lower range too (7 ft-lbs - to minimize the readout bouncing around too much) and the readout matched where the needle was pointing.
The quality seems to be there and it comes in a nice protective case. It comes with an inspection certificate in the box with the date of inspection, serial number of the adapter and handwritten values for the torque and the percentage of error at those values. It is also stamped with the name of the inspector and quality manager.
I'm pleased with the tool!
I bought it after my click-stop torque wrench failed me (Pittsburgh Pro 3/8" drive, for the curious). Basically, I'm torquing head bolts to 22, 44, and 66 ft/lbs. I used this tool to check the click-stop wrench. 22 and 44 were dead on. 66 failed to click.
My arm was getting tired when I was using the click-stop wrench, so I assumed I just wasn't pushing hard enough. It snapped a head bolt. I ordered this one (Alltrade 940759) last night with overnight shipping. It came in this afternoon. I breezed through torquing all the bolts. I torqued 16 bolts 3 times with no real hassles, so basically 48 torques in just a few minutes.
The beeps are intuitive enough. Some people said the LED doesn't quite follow the manual. I just used the "trace" mode, so I could watch the torque. It beeped intermittently as I reached the proper torque, and solid when I got to it.
I'm writing this as I'm taking a break. It's about 90 degrees out, and I'm working in the sun. I'm hot, and one arm is very tired (the one I was torquing with). I'll be going back out in a few minutes and doing the second head.
Some people mentioned getting returns. I got mine from Amazon fulfillment directly. There was a used option for just a few bucks cheaper, but I didn't want one someone else had managed to break. It was new in the box, with the battery tab still in place. So, yes, it's new.
The only thing, as some other people mentioned, is that you can bump the buttons while you're working. It chirps when you do, so take it out and reset it. It's easy enough. When I'd bump it, it would usually hit the setting button, so 66 ft/lb becomes 65.9 or 66.1. Even if I ignored the chirp, I would have still been very close to where it needed to be. I'm a perfectionist, so I prefer right over "good enough".
So basically, I should have this vehicle up and running again *tonight*, rather than breaking a few more bolts when the click-stop wrench fails me, and making this into a long drawn out project, and the annoyance of extracting more broken bolts. One is enough, thanks.
If you get one, read the instructions. They're short. The only "trick" was setting the unit of measure. It's the top left and right buttons (each side of the power button). It does shut off after 1 minute of non-use, so if you're working slow, check to make sure the LCD says something before you try to use it. That is explained in the instructions.
Thanks to Alltrade for making a nice device, and Amazon for getting it to me quick.