Bonzo
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- Joined
- May 8, 2022
- Messages
- 965
I've changed my counter shaft sprocket and I'm now ready to torque up the sprocket nut which is left hand thread - and it's here that I realized that although my TW can indeed tighten a left hander it doesn't in fact measure torque that way, only right handed threads.
I've done a search online and come up with some conflicting wording about what will do LH and RH threads.
For example, this is described as being a 'reversible ratchet spanner', but further down in the description it quotes 'Applies specific torque to right-hand threaded screw connections.' - it also looks very much the same as mine...
Another one is decribed as a 'Bi-direction ratchet', but doesn't confirm it will measure torque in both counter clockwise and clockwise...
I dug out my old Halfords TW which does both threads by way of pressing the drive pin through to the other side, unfortunately it max's out at 50ft/lb and this nut requires an 80ft/lb torque. I could tighten it to 50 and add more, but I'd sleep easier knowing it was right.
So, any recommendations?
I've done a search online and come up with some conflicting wording about what will do LH and RH threads.
For example, this is described as being a 'reversible ratchet spanner', but further down in the description it quotes 'Applies specific torque to right-hand threaded screw connections.' - it also looks very much the same as mine...
Neilsen Torque Wrench 60 - 330Nm 1/2" Square Drive Reversible Ratchet Spanner | eBay UK
Neilsen 1/2in.Dr Torque Wrench / 60 - 330Nm With Reversible 72 tooth Ratchet Mechanism. Laser etched scale with fine adjustment for the respective setting value. Ribbed Handle with Locking Ring for secure grip and easy torque setting Applies specific torque to right-hand threaded screw...
www.ebay.co.uk
US PRO INDUSTRIAL 1/2" Drive Torque Wrench 40-220Nm Bi-direction Ratchet | eBay UK
Adjustable torque wrench with bi-directional ratchet head. • Bi-Directional Ratchet. PRO INDUSTRIAL 1/2" dr Torque Wrench 40-220Nm. • Range: 40 - 220 Nm (30 - 162 ft/lb). • 1/2" Drive. • Strong Cr-Mo material for drive.
www.ebay.co.uk
I dug out my old Halfords TW which does both threads by way of pressing the drive pin through to the other side, unfortunately it max's out at 50ft/lb and this nut requires an 80ft/lb torque. I could tighten it to 50 and add more, but I'd sleep easier knowing it was right.
So, any recommendations?
