StudPuller Sizes
| Tool | Standard Size Stud | Metric Size Stud | Drive Size |
|---|---|---|---|
 |
0.75" to 1.125" | M20 to M28 | 0.75" - 1.00" |
 |
1.25" to 1.625" | M30 to M42 | 1.00" - 1.50" |
 |
1.75" to 2.25" | M45 to M58 | 1.00" - 1.50" |
 |
2.50" to 3.00" | M64 to M82 | 1.50" - 2.50" |
StudPuller Components
Features and Benefits
Stud Removal Facts
The Science
Centripetal force makes a body follow a curved path. Its direction is always orthogonal to the motion of the body and towards the fixed point of the instantaneous center of curvature of the path.
Issac Newton described it as “a force by which bodies are drawn or impelled, or in any way tend, towards a point as to a center.“
Safety First
The primary reason other methods prove to be ineffective is side loading - the mechanical binding of the threaded surfaces against each other. When this occurs, heat builds up due to friction within the threads of the stud and the housing, which in turn, creates a gall and prevents the stud from being removed. If attempts are made to remove a stud hydraulically, the gall created by this friction will carry to the housing, ultimately tearing out the threads.
Galling
Galling occurs frequently whenever metal surfaces are in contact, sliding against each other, especially with poor lubrication. Galling is distinctive from gouging or scratching in that galling involves the visible transfer of material as it is adhesively pulled from one surface, leaving it stuck to the other in the form of a raised lump (gall). Galling can often occur in screws and bolts, causing the threads to seize and tear free from either the fastener or the housing.