87
NOTES:
1. All clearances for cylindrical surfaces are diametrical.
2. Dimensions shown are with rotors in the thrust position.
3. If any components within a rolling element high speed shaft and
bearing assembly are damaged it is recommended that the entire
high speed shaft and bearing assembly be replaced.
Fig. 55 — Compressor Fits and Clearances — Two-Stage Compressor, Frame Sizes 6 and 7
Table 45 — 19XR Two-stage Compressor Frames 6 and 7 Fits and Clearances
ITEM
COMPRESSOR
FRAME 6 (in.) FRAME 6 (mm) FRAME 7 (in.) FRAME 7 (mm)
DESCRIPTION
A Low Speed Journal — Compressor End 0.006/0.007 0.15/0.18 0.006/0.008 0.15/0.19
B Low Speed Journal —Motor End 0.004/0.005 0.10/0.11 0.004/0.006 0.10/0.15
C Low Speed Labyrinth — Compressor End 0.009/0.013 0.23/0.32 0.009/0.013 0.23/0.33
D Low Speed Shaft Thrust Float 0.008/0.020 0.20/0.50 0.008/0.020 0.20/0.50
E Impeller Bore to Shaft — 1st Impeller –0.002/0.000 –0.05/0.01 –0.002/0.000 –0.05/–0.01
F Impeller Bore to Shaft — 2nd Impeller –0.002/0.000 –0.06/0.01 –0.002/0.000 –0.05/–0.01
G Low Speed Bearing Labyrinth to Shaft — Motor End 0.009/0.013 0.23/0.33 0.010/0.012 0.25/0.30
H Low Speed Bearing to Cover Assembly 0.002/0.004 0.04/0.10 0.001/0.003 0.03/0.08
I Bull Gear to Low Speed Shaft –0.001/0.000 –0.03/0.00 –0.0013/0.0000 –0.033/0.000
J High Speed Shaft Labyrinth to High Speed Labyrinth Sleeve 0.006/0.009 0.15/0.23 0.006/0.009 0.15/0.23
K Balance Piston Labyrinth to 2nd Stage Impeller 0.008/0.012 0.20/0.30 0.008/0.012 0.20/0.30
L 2nd Stage Eye Labyrinth to Impeller 0.008/0.012 0.20/0.30 0.012/0.016 0.30/0.40
M Interstage Labyrinth Spacer to High Speed Shaft 0.001/0.002 0.02/0.05 0.001/0.003 0.04/0.07
N Interstage Labyrinth Seal 0.011/0.017 0.29/0.42 0.009/0.012 0.23/0.30
O 1st Stage Eye Labyrinth to Impeller 0.016/0.020 0.41/0.50 0.024/0/028 0.62/0.72
LOW SPEED BEARING
MOTOR END
SEE DETAIL D
LOW SPEED BEARING
COMPRESSOR END
SEE DETAIL B
AERO
SEE DETAIL A
HIGH SPEED BEARING
MOTOR END
SEE DETAIL C
a19-2217
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