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Jul 25, 2021 14:50:06 GMT
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Can anyone help with either finding one for sale or loaning me one?
I need a beam type (or dial) as opposed to the click type - The issue I'm having is finding something that will go low enough, so ideally it'l be a 1/4 drive as the scale should be about right - anything bigger and the low torque will be unreadable. I need to go to a maximum of only about 20 inch lbs.
i have seen them for sale in the US for cheap, but delivery will take a good couple of weeks, i cant really wait that long.....
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Last Edit: Jul 25, 2021 15:00:29 GMT by Deleted
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hkr91
South East
Posts: 559
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Jul 25, 2021 15:32:19 GMT
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Last Edit: Jul 25, 2021 15:33:30 GMT by hkr91
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Jul 25, 2021 15:35:35 GMT
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Last Edit: Jul 25, 2021 15:36:17 GMT by Deleted
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Jul 25, 2021 16:27:21 GMT
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20"lbs is just over 1.5Lb/ft is it worth a torque wrench? You could manage that with a small screwdriver.
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Flynn
Club Retro Rides Member
Posts: 142 
Club RR Member Number: 166
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torque wrench helpFlynn
@flynn
Club Retro Rides Member 166
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Jul 25, 2021 17:08:25 GMT
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1971 MGB GT
1983 Daimler Sovereign 4.2
1999 Jaguar XJR
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Jul 25, 2021 17:12:18 GMT
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Yeah it's not a lot is it.
It's to set the pinion preload on an axle.
I've watched numerous videos and one was doing it by hand til he thought it was right and yet was only at 3inch pounds when he checked it!!
I'm not sure how sensitive the bearing is to the preload, but I've just got it wrong by overtightening it without a torque wrench, so had to order a new crush sleeve, I want to try and get it better/right this time.
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Jul 25, 2021 17:13:35 GMT
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Ouch, yep that would do it..... |
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Jul 25, 2021 17:14:54 GMT
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Can you use a lever of 20" and weigh it down with 1lb of weight?
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Jul 25, 2021 17:22:59 GMT
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Er, that's possibly a good idea...
Does it take more torque to start something moving than to keep it moving. I guess so?
To check the preload I would need to take the reading whilst rotating the pinion.
Can I rig this up?
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Jul 25, 2021 17:25:09 GMT
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Generally yes a little more to overcome internal friction/gravity etc. but only a smidge, once it's moving the lever technique should keep it moving. Obviously you can tweak the length/weight to your needs.
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Jul 25, 2021 17:30:39 GMT
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Hi, Yes you should ideally torque fixing in a single motion, stopping and starting means you have to overcome inertia and/or friction.
Setting pre-load on a diff scenario is usually done with a spring balance on lever on the flange.
Colin
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ChasR
RR Helper
motivation
Posts: 10,191
Club RR Member Number: 170
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torque wrench helpChasR
@chasr
Club Retro Rides Member 170
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Jul 26, 2021 11:41:02 GMT
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An electric one may be advisable, as many of those can give a dynamic torque figure prior to hitting their preset range.
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Darkspeed
Club Retro Rides Member
Posts: 4,682
Club RR Member Number: 39
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torque wrench helpDarkspeed
@darkspeed
Club Retro Rides Member 39
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Jul 26, 2021 14:41:26 GMT
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Setting on an Imp is done with string and a spring balance - I use an electronic fishing balance - I plan on using the same when I rebuild my Sierra diff but with a lever with a few holes in the right place.
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Jul 26, 2021 15:08:33 GMT
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Can you use a lever of 20" and weigh it down with 1lb of weight? That’s exactly how I did a cambelt on a 200tdi a few years ago , and it worked no problem until it needed doing again, by which time I’d bought a dial one, so +1 for that idea 👍 |
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Jul 26, 2021 19:49:07 GMT
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Thanks everyone, excellent info.
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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torque wrench helpslater
@slater
Club Retro Rides Member 78
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Jul 29, 2021 13:30:47 GMT
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They are ten a penny on the 2nd hand market mate. They are quite common in industry but not so much in automotive stuff so they don't make much money at auctions and the like. I would think an eye out on ebay will have you one at a decent price within a few weeks.
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duncanmartin
Club Retro Rides Member
Out of retro ownership
Posts: 1,320
Club RR Member Number: 70
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torque wrench helpduncanmartin
@duncanmartin
Club Retro Rides Member 70
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Jul 29, 2021 13:48:46 GMT
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20 inch lb is about 2.3 Nm. Lots of torque wrenches for bicycles will go this low, so maybe worth trying to find someone local with one of those? They have become pretty common with the proliferation of carbon parts. Often they are the clickable type though there are some beam ones out there. Eg this one has a lowest reading of 3Nm, but it's a bit cheaper than the rs-online one: www.wiggle.co.uk/topeak-combo-torq-wrench |
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