# What is bolt tensioner?

## What is bolt tensioner?

A hydraulic bolt tensioner is an annular jack which fits over the bolt and nut to be tightened. The jack pushes against the bolted joint and pulls on the end of the bolt which needs to be at least one diameter longer to accommodate the bolt tensioning tool.

How does a hydraulic tensioner work?

A hydraulic tensioner system consists of a hydraulic actuator in combination with a tensioner pulley. High dynamic belt loads are controlled by hydraulic damping. This damping is created when engine loads force the piston rod to move inwards displacing the oil in the cylinder.

How do you calculate bolt tension?

Tool Pressure = (Required Bolt Load x LTF) / Tool Hydraulic Pressure Area Units Tool Pressure = (N/mm2 or Ton/In2) Required Bolt Load = (N or Ton) LTF = (No Units) Tool Hydraulic Pressure Area = (mm2 or In2) *To convert N/mm2 to bar: Multiply by 10 * To Convert Ton/In2 to psi: Multiply by 2240 Caution: Check that the …

### How does a bolt tensioner work?

Bolt tensioning involves using mechanical means to physically stretch the stud bolt. The material becomes elongated as a nut is then placed onto the bolt. Once the nut is in place, the tension is released as the stud bolt’s metal returns to its original shape before the stretching work.

How do you check a timing belt tensioner?

Press on the belt between the pulleys. It should not move more than about ¼ inch. Tip: If the belt is loose, then the tensioner should be replaced. This is also a good time to check the timing belt.

How is bolt torque defined?

DETERMINING TORQUE The general equation for bolt load based on applied torque is T = KFiDb where K = torque coefficient. K is a function of the coefficients of friction and collar friction in the joint, and these are based on variables such as surface finish, coatings, and so on.

#### When do I need to replace my tensioner belt?

It’s a good idea to replace your tensioner and belt as soon as you see signs of wear if you have an older vehicle. If you have a newer vehicle, your tensioner and belt needs to be replaced regularly according your vehicle manual. At O’Reilly Auto Parts, we have tensioner assemblies for most makes and models.

How does a tensioner work on a car?

When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures. The tensioner in your car puts pressure against the serpentine belt to keep it from slipping on the engine pulleys.

How are the gates drivealign belt tensioner rated?

Touch device users, explore by touch or with swipe gestures. When autocomplete results are available use up and down arrows to review and enter to select. Touch device users, explore by touch or with swipe gestures. 5 out of 5 stars. Read reviews for Gates DriveAlign Belt Tensioner