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* See Figure 56 for item callouts.
† Clearances represent factory tolerances for new components.
Table 18 — Hermetic Compressor Fits and Clearances
Item* Description
Clearance†
Type of
Measure
in. mm
Minimum Maximum Minimum Maximum
1
1st Stage Impeller to Diaphragm
See Tabulation
Axial
2
2nd Stage Impeller to Discharge
Wall
Axial
3
1st Stage Labyrinth .0160 .0200 .4060 .5080 Diametral
4
Interstage Labyrinth .0120 .0160 .3050 .4060 Diametral
5
2nd Stage Labyrinth .0080 .0120 .2030 .3050 Diametral
6
Balancing Piston Labyrinth .0080 .0120 .2030 .3050 Diametral
7
Impeller Shaft Journal Bearing .0030 .0045 .0762 .1143 Diametral
8
Thrust-end Float .0100 .0150 .2540 .3810 Axial
9
Counterthrust Bearing Seal Ring .0020 .0040 .0510 .1020 Diametral
10
Gear Bearing to Gear .0050 .0065 .1270 .1651 Diametral
11
Gear Bearing to Gear .0100 .0185 .2540 .4699 Axial
12
Gear Bearing to Bearing Housing .0005 .0025 .0127 .0635 Diametral
13
Pinion Bearing to Pinion .0040 .0055 .1016 .1397 Diametral
14
Pinion Bearing to Bearing Housing .0005 .0025 .1270 .0635 Diametral
15
Transmission Labyrinth .0060 .0100 .1520 .2540 Diametral
16
Motor-End Labyrinth .0050 .0080 .1270 .0635 Diametral
17
Motor-End Bearing to Shaft .0040 .0054 .1016 .1372 Diametral
18
Motor-End Bearing to Bearing
Housing
.0005 .0020 .0127 .0508 Diametral