How often does a split-beam torque wrench need to be calibrated?

[AmateurMechanic]

It's common knowledge that the standard micrometer style clicker torque wrench needs to be reset to zero after each use and also needs calibration every couple of years to maintain accuracy.

Is this also true for split-beam clicker type torque wrenches? Note, I'm not referring to the standard beam style which requires you to read a dial, I'm referring to the kind below:

 

[kunkernator]

You do not need to reset a split beam to zero after use.

As for calibration, it all depends on usage. If you use it constantly, get it calibrated more often, if you use it once or twice a year, you should never need it calibrated. Also, if any damage occurs, or you drop it hard, it wouldnt hurt to have it calibrated sooner.

 

[justanengineer]

In the Army we calibrated every torque wrench every quarter. In manufacturing where they are used constantly I've seen them calibrated weekly. In reality it comes back to traceability for quality bragging...errrr....certification. If you need it, the certification drives the schedule. If you dont and are using it professionally I'd still do so every 6-12 months. If you're a hobbyist I'd have it calibrated as your wallet and conscience allow.

Please note that I did not distinguish between torque wrench types or sizes, in a professional shop they all get calibrated and regularly.

 

[guy48065]

...in a professional shop they all get calibrated and regularly.

Correct. It's all about risk management. In ISO specs you're allowed to extend the cal interval IF past history shows the tool is accurate, reliable and repeatable. Likewise it must be shortened if it fails.

If accurate torque doesn't matter, don't get it checked.
If you work on your kid's cars, take money for your work, or anything that might land you in court if things go very bad--CYA.