The Radius Kid
Active Member
- Joined
- Jan 26, 2002
I recently took my Te63e in to Jim Haley to get rebuilt for TTipe's new build.
After procuring the rebuild parts for the center section I got a call from Jim telling me there was a small problem that needed to be rectified.
It turns out the inner thrust hat was floating in the relief groove for the compressor/thrust ring shaft.
The width of the groove appears to be .312" wide.
The overall height of the inner "hat" is .321" high from the back face to the top of the spigot.
That also means that the inner bore height is the same from the back face to the top of the spigot.
With the small chamfer in the bore of the original part,the hat registers on the larger OD to stay centered.
The new part is the same height,but the chamfer in the small end appears to be around .020" X 45 degrees.
The original appears to be slightly rounded and around .005" wide.
Now .321 - .005 = .316"
.321 - .020 = .301"
It would appear the old part was riding on a very thin band of the shaft to center itself and stayed centered,but the new one can't ride on any part of the shaft and actually drops into the relief groove,running off center.
That's why it couldn't be balanced after it was bolted together - the inner thrust hat was running out.
Apparently the parts dimensions were decided on by Harry at Precision and John Craig at Limit.
Pics included below.
After procuring the rebuild parts for the center section I got a call from Jim telling me there was a small problem that needed to be rectified.
It turns out the inner thrust hat was floating in the relief groove for the compressor/thrust ring shaft.
The width of the groove appears to be .312" wide.
The overall height of the inner "hat" is .321" high from the back face to the top of the spigot.
That also means that the inner bore height is the same from the back face to the top of the spigot.
With the small chamfer in the bore of the original part,the hat registers on the larger OD to stay centered.
The new part is the same height,but the chamfer in the small end appears to be around .020" X 45 degrees.
The original appears to be slightly rounded and around .005" wide.
Now .321 - .005 = .316"
.321 - .020 = .301"
It would appear the old part was riding on a very thin band of the shaft to center itself and stayed centered,but the new one can't ride on any part of the shaft and actually drops into the relief groove,running off center.
That's why it couldn't be balanced after it was bolted together - the inner thrust hat was running out.
Apparently the parts dimensions were decided on by Harry at Precision and John Craig at Limit.
Pics included below.