What happens to a straight shaft when it is bent?
In a perfectly straight shaft, the centers of each shaft cross-section from end-to-end of the shaft lie on a straight line. A shaft is bent if that is not the case.
What’s the best way to straighten a shaft?
In an ideal bent shaft straightening process, the repair relaxes the stresses in the material fibers that initially caused the shaft to bend. If the process restores the deformed shaft material fibers to their original state, prior to bending, the chances for a long-term successful outcome are good.
Can a bent shaft be used for salvage?
Shaft straightening methods, when properly applied, can sometimes be used to salvage damaged shafting. Because of the different variables involved, shaft bend correction can be as much an art as a science. Each application is unique, and needs to be reviewed on a case-by-case basis.
What are the most difficult bends to straighten?
The most difficult types of bends to straighten are those that have a combination of bending and twisting. A bent shaft survey map is used to determine the type of bending that needs to be straightened. The material from which a shaft is manufactured is a significant factor in determining the feasibility of a successful repair.
Why do I need a bent gearchange shaft replacement?
Also to be replaced is the seal around the gearchange shift shaft. This is the seal that was showing signs of wear due to the off centered bent shaft. This was the most likely place for a leak to happen! Position of C-clip and washer, on left side, behind large gear. Like I said, hard to get at!
In a perfectly straight shaft, the centers of each shaft cross-section from end-to-end of the shaft lie on a straight line. A shaft is bent if that is not the case.
In an ideal bent shaft straightening process, the repair relaxes the stresses in the material fibers that initially caused the shaft to bend. If the process restores the deformed shaft material fibers to their original state, prior to bending, the chances for a long-term successful outcome are good.
How is the runout of a bent shaft measured?
In a bent shaft, the axis of the shaft is different than its axis of rotation. The range of the orbit or gyration caused by the shaft bend is defined as the shaft runout, and is typically measured in terms of “TIR” (Total Indicator Reading).