FOR MODELS: JGI, JGM, JGN, JGP AND JGQ SECTION 2 - INSTALLATION
9/08 PAGE 2-9
• If dial indicator methods, are used, be sure that readings are repeatable.
• Correct for indicator arm sag.
• Check the crankshaft thrust, or end play, after any movements have been made. Both
the compressor and driver shafts should “float” either direction and hold position. If
the shafts resist float or “spring” back, the axial clearance must be corrected. See
Section 1 for allowable compressor crankshaft thrust clearance values.
• Confirm that the alignment is within tolerance by checking the face and rim TIR at the
coupling after all components are heat soaked.
When properly aligned, the forces on the connected equipment will be at a minimum. This will
result in a smooth running unit and long bearing life.
TABLE 2-3 TB Woods HSH/FSH Couplings - Angular TIR
Coupling Size Flange OD, In. (cm) Angular TIR, max., In. (mm)
22 6.00 (15.2) 0.005 (0.13)
26 6.87 (17.5) 0.005 (0.13)
31 8.12 (20.6) 0.005 (0.13)
35 9.12 (23.2) 0.005 (0.13)
37 10.06 (25.6) 0.005 (0.13)
42 11.00 (27.9) 0.005 (0.13)
45 11.87 (30.1) 0.005 (0.13)
50 13.43 (34.1) 0.005 (0.13)
55 15.00 (38.1) 0.005 (0.13)
60 16.75 (42.5) 0.005 (0.13)
70 18.93 (48.1) 0.0055 (0.14)
75 20.62 (52.4) 0.0059 (0.15)
80 22.37 (56.8) 0.0064 (0.16)
85 23.75 (60.3) 0.0068 (0.17)
92 25.75 (65.4) 0.0074 (0.19)
105 29.25 (76.1) 0.0084 (0.21)
160 33.50 (85.1) 0.0096 (0.24)
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