10 replies to this topic

[maccers]

Question: How do you measure the tightness of a left hand thread? I need to remove both rear hubs to replace the studs on them for longer ones, and the left had side is a left thread.

My Draper Torque wrench allows use in both directions, ie do up, and un do, my Halfords one only allows traditional "do up" direction.

I am sure my Draper tool does not click on traditional "un do" which will I guess be "doing up" the left hand side. It does click on the normal "do up" way.

So just wanted to know how to measure it, as its quite a key part I will be removing!

Richard.

[Guess-Works.com]

Does your halfords one not have a push through ratchet ?

[maccers]

Just looked at it has a small circlip holding the drive on - assume this is the bit i need to reverse?

Edited by maccers, 24 July 2011 - 04:47 PM.

[icklemini]

no - usually the 1/2" bar where the socket slides onto will push through to the other side...

[maccers]

Nope, its like a solid wheel / grip on one side, with a 1/4" drive on other. It only go to 44LBS - assume the rear axle nut it maybe 60+ lbs?

Might look at hiring one for the job. Or just do it up FT!!

[maccers]

Looks like this - http://www.halfords....tegoryId_165469

[maccers]

just pushed the drive and it popped out, never knew it done that. Will go and get one with a bigger range on it.

Thanks for that GW and Ickle....

[ibrooks]

Just for reference - quite a lot of torque wrenches just won't do left hand threads. I've got a Draper and a Teng click type that won't despite being the ratchet type and the ratchet mechanisms are reversible. I've got a much older Draper that has a dial to show the current torque being applied and that has a 3/8" square sticking out both ends of the head so it'll work in either direction.

Then there's my Britool torque wrench..... It's not a ratchet and the 1/2" square will push through the head to torque things in either direction. It's of a size that's more usually seen tightening the wheel-nuts on buses and artics. Ideal for the front hub-nuts though.

Iain

[MRA]

Torque wrenches should never be used to "undo" anything.... as it screws up the calibration.

[maccers]

Yep, indeed, I have an old knackered Draper wrench I use as a breakder bar undo helper. The Halfords one only allows one way tightening, unless you take the drive out and put it on the other way, that I discovered yesterday.

I also read somewhere when not in use to slacken them right off to maintain accuracy etc.

[Guess-Works.com]

Correct