# How do I know if I need torque a bolt?

## How do I know if I need torque a bolt?

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.

## What happens if you dont torque bolts to spec?

Insufficient torque Alternatively, the engine’s vibrations can cause the bolt or nut to come undone, displacing the tensioner. This, in turn, will lead to incorrect belt tension and, eventually, to belt and/or engine damage.

How much torque can a 5/16 bolt take?

ASTM A449 / SAE Grade 5*

Bolt Size TPI Tightening Torque (ft lbs)
Plain
5⁄16 18 17
3⁄8 16 31
7⁄16 14 49

Does every bolt have a torque spec?

Every nut, bolt and screw has a torque specifications. And, there will be some who disagree, but, most mechanics will use their intuition to tighten almost all of the fasteners on a car.

### What are torque specifications?

Torque specifications are for dry threads only. The fastener threads should be free of oil, dirt, grit, corrosion, etc. The hardware should turn freely without binding when tightened by hand. It is important NOT to lubricate hardware threads or seats. The friction at which torque is measured against should come from the hardware seats.

### What are the torque specs for vehicles?

What Are the Torque Specs for Vehicles AMC Trucks GM Trucks. A lot of things go between the engine block and oil pan that help components to go round and round, up and down. 5-Liter, Inline Four-Cylider. The base engine offered in the 1999 Ford Ranger is a 2.5-liter, inline four-cylinder motor. 0-liter V6. 0-Liter V6.

What is metric torque?

The metric (SI) unit of torque is the newton metre (Nm). In inch units, torque is usually measured as Lb-Ft (pounds feet) or Lb-In (pounds inch).

What is a torque screw?

Screw Conveyor Torque. Torque is defined as the twisting force exerted by the drive unit on the conveyor screw. Torque is transmitted through the drive shaft of the drive unit to the screw and converted to force to convey the bulk material.

Posted In Q&A