For those critical bolted joints, high pressure bolt tensioners will provide the optimum bolt load every time.

Larger industrial sized bolts are usually tightened in one of two ways when hand torque wrenches cannot provide sufficient power, hydraulic torque tools and hydraulic tensioners. Hydraulic tensioners are ultra-high-pressure cylinders which grip the bolt and stretch it using up to 20,000 psi of pressure. The nut is then manually tightened, and the hydraulic cylinder released, leaving the required residual bolt load.

This type of industrial bolting approach is generally used on more critical applications where residual load is critical. The approach is usually less cost effective as a minimum of 50% consecutive coverage and longer bolts are required.

The benefits

  • Accurate residual bolt load
  • Suitable for critical applications