Quick Answer: How Do I Know How Much Torque My Bolts Are?

What size drive torque wrench for lug nuts?

1/2 inchA 1/2 inch torque wrench with a working range of 30 to 160 ft lbs is the correct size tool for lug nuts and other heavy fasteners..

How do you convert tension to torque?

The Torque/Tension Equation is a method used to estimate the torque/tension relationship in an assembly. T = (K D P)/12 can be used to developt a torque value that will achieve a certain tension or clamp load. T = Torque (ft. -lbs.)

What is a good torque for an impact wrench?

Generally speaking, an impact driver in the 1500 to 1800 in-lb range that puts more emphasis on higher RPM will do 95% of the work faster than one with more torque and slower speeds. Our rule of thumb is that if you need to reach for a socket adapter, you’re better off grabbing an impact wrench.

How do I find the torque specs for my car?

Any repair manual specific to your vehicle (Chilton’s, Haynes, Motor, Factory manual, etc.) You can find them at most parts stores, you can check them out at your public library, you can find them on eBay and sometimes on craigslist, and you can download a pdf file from the internet, often free!

What are the three factors that determine a torque?

The amount of torque produced by an AC induction motor is determined by the following three factors:the strength of the magnetic field of the stator.the strength of the magnetic field of the rotor.the phase angle difference between the magnetic fields of stator and rotor.

Should you torque nut or bolt?

In many situations you can apply torque to either the nut or the bolt head. Both will result in a tight connection and neither will avoid breakage more often (that occurrence can be avoided through other means). In certain circumstances, however, you will need to torque one and not the other.

What is the torque value of a bolt?

US Recommended Bolt TorqueSizeRecommended TorqueGrade 218-8 S/S5/16″811.83/8″15227/16″243313 more rows

What is torque measured in?

Newton-meterHow is torque measured? The SI unit for torque is the Newton-meter. In imperial units, the Foot-pound is often used.

Can I reuse torqued bolts?

However, because the tightening procedure does permanently stretch the bolt, there is some risk of breakage if the bolt is reused. And since there is no way to tell how many times a bolt has been reused, it doesn’t make any sense to reused TTY bolts – the risk far outweighs the replacement cost of used bolts.

How do you know how much torque a bolt has?

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.

How tight should lug nuts be torqued?

The general rule for steel wheel lug nut torque is usually around 80ft/lb, and for aluminum wheel is around 100ft/lb. It can be used in most cases, but we would still prefer you to research for the exact torque for every particular model before you start working.

What are the torque specs for a 5’8 bolt?

ASTM A325Bolt SizeTPITightening Torque Range (ft lbs) (Min – Max)Galv+Waxed1⁄21350 – 585⁄81199 – 1203⁄410175 – 2136 more rows

Is it OK to hand tighten lug nuts?

But to reiterate, tightening lug nuts with your hands can result in loose tires, so if you don’t have a torque wrench or a tire iron, then it’s best to call roadside assistance so you’ll get home safely.

Do you have to jack up your car to tighten lug nuts?

3 Answers. Nope, doing it with the wheels on the ground if fine, no need to lift the weight of the wheels. It’s easier that way because the wheels can’t turn while you are torquing the lugs.

What is the torque for a 3/4 bolt?

Tightening Torque Guide for Grade 5 & 8 Hex Cap ScrewsGRADE 5Coarse Thread5/8-18 (.625)16350128 ft lbs.3/4-16 (.750)23775223 ft lbs.7/8-14 (.875)32475355 ft lbs.31 more rows

How do I know how much torque I need?

Torque is defined the length of the lever arm multiplied by the force applied. For instance, if you have a two-foot long bar and you hang a 10-pound weight from it, you have 20 foot/pounds of torque.

What are the factors that affect torque value?

The many factors influencing the Torque-Tension Relationship include the material, size, plating, surface finish, thread lubricants, corrosion and wear of fasteners, nuts and washers, among others.

How much torque is required to move a car?

All Answers (14) The required tractive torque of the motor shall be equal to the tractive torque at wheel, Tw = Ft. rw , (i.e. Tractive Torque = Tractive Force x mean wheel radius). So you must determine the acceleration required to reach you designed speed.

Do I really need a torque wrench?

If you plan to do any major work on your engine or on some major powertrain components, you absolutely need a torque wrench. Overtightening cylinder-head bolts, for instance, can easily cause expensive damage and catastrophic coolant loss. Too-tight exhaust manifold bolts can cause the manifold to crack.

Is tension a torque?

“Torque” is simply a measurement of the twisting force required to spin the nut up along the threads of a bolt, whereas “Tension” is the stretch or elongation of a bolt that provides the clamping force of a joint.