Torque for herald 1200 crankshaft pulley nut

[JohnD]

Tipidave,

Yes, you could do that and have a look-up table so that you could guess what the wrench was clicking at, OR you could get it recalibrated.   Look online for someone near you, who can offer the work to ISO 6789.   ( ISO 6789.2017 is a later, more expensive standard!).  However it'll cost about £50, so a new wrench might be a better option.

John

[Colin Lindsay]

[DVD3500]

Missing a 4th: Bolt sheers=too much torque

 

[JohnD]

Actually, that joke is about right!

"Hand tight", using only the muscles in your forearm, is 10-12 ft-lbs. (NB sump flange bolts!)

Your upper arm muscles, biceps, triceps, can exert about twice that, and using the shoulder muscles that are even larger and connect to your spine, about four times.

After that, it's multiplying their power by a longer lever. For instance, Triumph rear wheel bearing but 120ft-lbs (from memory, don't quote me!) or Ford Grenada stub axle nuts, 350ft-lbs!

John

 

[Pete Lewis]

remember most production torque  figures were introduced to get non skilled operators to achieve    with tooling a consistent and safe assembly on a production environment 

donald duck and king kong have very diferent ideas of hand tight on production it gave a repeatable operation some quality , 

Pete