Don't trust new click type torque wrenches.

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CaptAirhead
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Don't trust new click type torque wrenches.

Postby CaptAirhead » Mon Sep 10, 2018 2:53 pm

Having fixed the oil feed problem , it was time to re-assemble the cylinder but my old torque wrench was a bit heavy duty with the lowest setting at 30 Lb/ft so I ordered a new one calibrated from 10 to 150 Lb/ft. Before I used it on the cylinder studs ( 25 lb/ft) I decided to test it on a non critical part so I set it at 10lb/ft and torqued up the rear suspension top bolt( which I had loosened) expecting it to click off fairly soon but it just kept going until I was certain it was at least twice as tight as it should be and it still didn't click off. I then tested the nut with an old but trusted Elora torque wrench and it indicated well over 30 lb/ft and was still going:-

ImageElora Torque wrench by Ian Beat, on Flickr

The annoying thing was that although I could recalibrate my old click type wrench, I couldn't see a way to calibrate the new one as it didn't have the nuts on the bottom of the handle :-

New wrench in the red case:-

ImageTorque wrenches by Ian Beat, on Flickr

Needless to say, It's getting returned for a refund and I'll stick with the old school Elora but imagine if I didn't know any better and tried to torque up my cylinder studs with that?

Ian.
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windmill john
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Re: Don't trust new click type torque wrenches.

Postby windmill john » Mon Sep 10, 2018 3:09 pm

I get your pain.
I have an 8-65 Nm Halfords Pro and a 40 (I think) to 200 Nm Halfords Pro.
Sometimes at low settings on the 8-65, it didn’t click! Blooming ridiculous.
So, I bought one just for delicate jobs, 4-20 Nm.
Expensive, but got it from eBay, works a treat.
The 8-65 just sometimes throws a wobbly, I just have to give it a stern look!
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Galactic Greyhound
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Re: Don't trust new click type torque wrenches.

Postby Galactic Greyhound » Mon Sep 10, 2018 5:03 pm

I have had this problem as well and not just because I don't hear well!

The wide-range click-type torque wrenches seem to be most susceptible to the 'no-click' or 'poor-click' problem when used at the lower settings.

My 'click-type' torque wrench has long been discarded in favour of an old 'Elora' beam-type where I can see the torque being built up - much safer, considering the hassle of a stripped thread or broken bolt.

I did investigate the possible use of an electronic LCD torque adapter for use with my socket sets.
These are available but, IIRC, the range was not suitable and I decided to wait for the technology to catch up with suitable ranges and prices.
Ced.

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Re: Don't trust new click type torque wrenches.

Postby Mjolinor » Mon Sep 10, 2018 5:11 pm

For low torques I use a T bar and a spring balance even though my wrench does go down there, I know they are crap unless you are mid range.

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Re: Don't trust new click type torque wrenches.

Postby CaptAirhead » Tue Sep 11, 2018 1:57 pm

I intended to return this new torque wrench for a refund so didn't attempt to find out how to re-calibrate it in case I damaged or marked it. As it happens, I got a full refund and the seller didn't want it back so I had a wee go at it and discovered that all I had to do was prise off the end cap and I got at the adjustment:-

ImageTorque wrench calibration by Ian Beat, on Flickr

It looks fairly straight forward so will have a go at re-calibrating it with my luggage scales. I'll let you know how it works out.
Ian.
If you don't make mistakes, then you aren't trying hard enough!

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Galactic Greyhound
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Re: Don't trust new click type torque wrenches.

Postby Galactic Greyhound » Tue Sep 11, 2018 4:00 pm

It's not a matter of recalibration, the fundamental problem is that wide-range click type wrenches do not perform satisfactorily at the lower settings in that the 'click' and the 'break' point is not sufficiently loud or strong to trust the wrench.

I lubricated and recalibrated mine but with little improvement and find that type of wide-range wrench untrustworthy.
Ced.

R1100RT 1996.
Sent by Boson Quantum Transmission from the Starship 'Galahad'.
http://www.researchgate.net/publication ... ing_bosons" - It works!

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Re: Don't trust new click type torque wrenches.

Postby Mjolinor » Tue Sep 11, 2018 4:17 pm

You really do need a 1/4, 3/8, 1/2 and a 3/4 or a torque multiplier no matter type you use. A spring balance and T bar will work whatever you are trying to torque to.

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Re: Don't trust new click type torque wrenches.

Postby CaptAirhead » Tue Sep 11, 2018 5:06 pm

I'm quite happy with my old Elora. If I can get the clicky ones working satisfactorily,I'm just going to sell them.
Ian.
If you don't make mistakes, then you aren't trying hard enough!

1979 BMW R80/7 (ex-Police)
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c13pep
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Re: Don't trust new click type torque wrenches.

Postby c13pep » Wed Sep 12, 2018 9:09 am

It`s the age old problem for the home mechanic of how to accurately calibrate a torque wrench but in todays world of Chinese copies you never know what your dealing with. I used to use a spring balance but found that to be very unreliable so these days it`s down to borrowing friends wrench's and comparing them with a given torqued nut, on the theory that all of them cannot be wrong at one time. I have to say my trusty Britool wrench`s are generally there or there abouts but of course then you move into ensuring threads are completely dry for the test etc.

CHRIS

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Re: Don't trust new click type torque wrenches.

Postby Mjolinor » Wed Sep 12, 2018 9:48 am

I think that most of the time "ball park" but all the same is the important thing anyway when it comes to vehicle parts.


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