I've a cordless mid/high torque Bosch impact wrench.
I'm confident that when I use it on my car's wheels there are no problems regarding on how much torque I apply to the nuts.
The issue is when I need to work on an engine, I don't pretend to apply the right torque but I worry that I could break the nuts and bolts.
I know that I could use a hand torque wrench tool but I'm working on a scooter's variable clutch which has a 46mm nut and there is no way to hold the clutch (without damaging it) in a bench vise so that is why I'm using the impact wrench.
So how do you guys manage the tool?
Impact wrench: how do you know or measure the torque?
billadm on 19/07/2023 - 11:51
Comments
You could use a torque bar set but you'd still want to check with a torque wrench/angle bar afterwards.
The torque bar could be an option but I can't check the torque with a hand tool because there's no way I can lock the clutch.
https://www.pedparts.co.uk/product/3322/complete-clutch-torq…Aren’t those holes so that you can use a tool to hold it? Looks like it would be pretty easy to whip something up out of scrap metal.
Allen keys or a pin punch could also work, no need for special tools.
No sorry, the previous picture was there to show the nut, this other is the real one.
https://www.scooterwest.com/driven-pully-assembly-bv350-b015…@mapax: Sorry I didn't see your replay.
The pulley strap wrench seems a good one and I didn't know about it.
But I think that I would need to hold it with both hands because the nut I need to work on is 46mm.
I need the torque wrench anyways for doing other stuff so I'm ok by using it for this task.
And I already got it from Amazon US, a much cheaper Bosch (even including delivery) than what they sell here, mind you they still come from Asia!
Eventually if you use it enough you might get a feel for how many ugga-duggas make it tight and how many make it stupid tight and how many will break the bolt.
You can’t set the torque. It’s just the feel of it.
ugga-duggas
so good
It’s quite different from the dak-dak you use to drive screws in.
ugga-duggaa 3000
I just keep going until the ugga duggas stop
You use the impact wrench to undo, not do up.
You use a torque wrench with the appropriate size socket to check the torque."I'm confident that when I use it on my car's wheels there are no problems regarding on how much torque I apply to the nuts."
There absolutely is. Too much torque means you can't undo them to replace the tyre. What happens if you get a flat and are stuck on the side of the road and can't swap over to the spare?The wheel bolt is a heavy duty one so I know when to stop with the impact wrench tool.
But on the engine there is a high risk to damage or to break it.Using an impact wrench to do up bolts is a fast way to headaches after snapping a bolt off and then having to try and remove it.
Use the right tool for the job. Especially when working on something like a 2-wheeled vehicle where in the end it's your safety. This is coming from someone who works on their motorcycles.Best of luck to ya.
You will also destroy your rotors if you over tighten with an impact wrench.
An impact wrench and a torque wrench are two completely different tools with two completely different purposes.
By all means take a wheel nut off with an impact wrench if its corroded on. But for dog's sake don't put one on with an impact wrench. Some idiot at a tyre place did when I got new tyres. So when I got a flat I couldn't get the nut off with just a wheel brace to change to the spare. I bent the wheel brace standing on it to try to get enough leverage to loosen a wheel nut that had been put on with an impact wrench. I had to drive on a flat tyre - destroying it - to get the car to somewhere where they could impact wrench the nut off.
how do you know or measure the torque?
My wife does all the torquing.
My wife does all the torquing
And here goes the off topic trolling, I'm sure your wife does the torquing things only to other people.
And here goes the off topic trolling
Do you do it often?
Do you mean your mama?
The only hope you've got it doing something up with a torque wrench and comparing it to your rattle gun. Maybe use the lowest setting of your rattle gun, half a second on say a wheel nut, then check it with a torque wrench. Adjust the time accordingly. Even then it's not going to be that accurate.
I'm confident that when I use it on my car's wheels there are no problems regarding on how much torque I apply to the nuts.
Lol. Just remember to back it off a 1/4 turn after the wheel stud snaps, ok :D
If you are going to use an impact gun on wheel studs, at least get a torque socket drive kit.
The best and easiest way to test torque is to get a 3/4" bolt and nut and do it up until the gun stops torquing it. Then get a torque wrench and set it and see if it clicks. If it does, go up 10~20Nm and try again. Repeat until the torque wrench turns the bolt before the indicator clicks.
Also, the rest of your post shows that you should not be working on shit if you dont know how to use the correct tools for the job. You are going to over or under tighten something or even strip thread or break bolts by just rattle gunning everything.
A good general rule of thumb I tell the apprentices at work is, if I see them using a rattle gun to tighten something, the rattle gun is going straight up their arse.
Hey pegaxs
I've often wondered why torque wrenches can be adjusted to loosen shit but that's also one of the worst things you can do with a torque wrench. Hmmm.
Because left hand threaded bolts exist? You need to be able to torque up in both directions?
And the reason it isn't good is because you can over torque the tension wrench by using it as a breaker bar… Now, if you set the tensiuon wrench to 50Nm and it only takes 25Nm to get the fastener undone, no harm, no foul. But if you set it to 50Nm and it takes 200Nm to get it undone, well, you risk damaging the tension wrench…
Or it's a deep state conspiracy theory that the "big tool" cabal sell you the idea to make you buy breaker bars and rattle guns?
Because left hand threaded bolts exist?
That makes sense. I hardly ever work with reverse thread let alone have to torque them. Cheers
@Muzeeb: The other thing is, I have a few torque wrenches at work that are one way only. They only click if you are doing up regular bolts.
If you were to use one of these in the reverse direction to undo bolts, it could bend the torque arm and put it way out of calibration.
So, the general consensus is, with any measuring tool, use it to measure stuff. If you need a breaker bar, go get a breaker bar.
1) Some torque wrenches have a 1/2" drive front and back, so they are definitely reversible?
2) The "needle type" are handy to loosen factory bolts, to see how tight they were originally torqued up.
Rare cars, without workshop manuals, sometimes need some guesswork.3) If a torque wrench explicitly says it is one direction only, fair enough,
but the manual ones I have used will click either way!
I don't see the problem for loosening something with one.
You set it for 30nm, and it clicks.
You set it to 70nm, and it clicks.
You set it to 110nm, and carefully use a long pipe over the wrench, and the bolt starts to turn.As long as you aren't hitting the thing with a hammer,
it is just working exactly the same as if you were tightening things???
tube da torque test channel!
The question you asked indicates you need a mechanic.
You torque up bolts or nuts, so there's an equal force surrounding a divided area, not a spring-loaded nut, just wind it till it runs out of thread the spring will stop it from loosening
Terrible advice.
You do a nut up and measure it with a torque wrench to get a close enough idea, tedious but generally only need to do it once with air impact, battery might be less when its low on charge
its not supposed to be used for anything precise
Thanks, I bought a 120nm torque one from eBay.
Like others said, using an impact driver for torquing down fasteners isn't usually the best way. They're great for loosening, but if you need a particular torque, or if you're fastening into softer metals, steer clear. You'll never get the right amount of control over the torque. Sometimes I use the impact driver to get the fastener into the hole but never to tighten it. It's handy when you're trying to grease the fitting as you can go forward and reverse quickly to get the grease through the thread. But never for tightening - ever.
When my marine dealer told me his team use rattle guns or impact drivers to reassemble engines, I decided not to have them service my craft any longer… especially since my engine and mechanical parts are usually alloy with stainless steel fasteners. Imagine an 18 year old apprentice torquing down some m10 stainless bolts into an aluminium alloy pump with an impact driver??? Blows my mind.
They are not used for doing things up to precise torques. People that don't know what they are doing shouldn't be using them to do up anything at all on an engine. You should also be checking wheel nuts by hand.