Warren & Brown torque wrenches are tested & calibrated across the scale to within +/-2% of scale reading. Please check the product details on the specific torque wrench page.
We’ve been manufacturing torque wrenches for over 70 years.
Our deflecting beam torque wrenches last for many years and have a lifetime warranty.
Our torque wrenches meet AS/NZS 4115-1993 & ISO-6789
Both types have their advantages, however micrometer type torque wrenches use a coil spring to apply resistance. Coil springs may lose their compression properties if left under load for long periods of time. While it's impossible to leave the deflecting beam torque wrench under load, therefore the calibration will not be adversely affected.
Depending on usage, but generally every 12 months or 5,000 cycles. We frequently see 20-year-old torque wrenches that are still accurate.