Automotive studs - NSQF LEVEL 4 Unit 2 - Session 3

                 

AUTOMOTIVE STUDS

               Studs are mechanical fasteners which are threaded on one or both ends. One end is secured to an object. The other end is used typically with a nut. Automotive studs are commonly referred to as a double ended automobile fastener.

Source:Exports India

     Automotive studs are fastened at both the ends with the help of an

 unthreaded shank. 

With the growing automotive parts industry, various automotive fasteners manufacturers & suppliers are coming up with new materials to manufacture a variety of auto studs.

Wheel Studs

 Wheel studs are the threaded fasteners that hold on the wheels of many automobiles. They are semi-permanently mounted directly to the vehicle hub, usually through the brake drum or brake disk. 

Source:Grimmer Motors

 Wheel stud assembly during tire changes rather than trying to hold up the wheel and tire while lining up the holes to insert a bolt. The primary advantage of wheel studs over wheel bolts is greater ease for tire changes by creating the ability to lift both the wheel and tire onto the studs creating the ability to hold and locate the assembly during tire changes rather than trying to hold up the wheel and tire while lining up the holes to insert a bolt.

Types of wheel studs

Wheel studs are replaceable and come in two basic kinds: press-in and screw-in.

fig:Screw-in studs

Source: IndiaMart

Screw-in studs, simply screw into the existing threaded bolt hole in the hub. The end that screws into the hub is usually either threaded with a higher tolerance fit or installed with a chemical thread-locking fluid to keep it from backing out from the hub when the lug nut is removed.

fig-press-in

Source:Amazon.com

 Press-in studs are installed from the back side of the disk or drum hub and may require removal of the hub from the vehicle for installation or removal. They consist of a threaded portion and a larger diameter section, called the knurl, which is splined to prevent rotation. The diameter of the knurl is larger than the hole in the hub requiring a press fit to seat the stud. The stud is prevented from being pulled through the hub by a larger diameter stop on the end. Most press-in studs are designed and recommended to be press-in type stud installed with a mechanical or hydraulic press to ensure proper seating without damage.

 

-Engine studs

Source:IndiaMart

-Main studs

Source:Hawks Motorsports

-Cylinder head studs

Source:DSPORT Magazine

        Fill in the blanks

1.Studs are ………….which are threaded on one or both ends.

Ans: mechanical fasteners

Answer the following

1. Write a short note on wheel studs

Wheel studs are the threaded fasteners that hold on the wheels of many automobiles. They are semi-permanently mounted directly to the vehicle hub, usually through the brake drum or brake disk. The primary advantage of wheel studs over wheel bolts is greater ease for tire changes by creating the ability to lift both the wheel and tire onto the studs creating the ability to hold and locate the assembly during tire changes rather than trying to hold up the wheel and tire while lining up the holes to insert a bolt.

2.   Types of wheel studs

        Screw in studs

    Press in studs

    Engine studs

        -Main studs

        -Cylinder head studs