Zero-Max Aluminum Single Flex Six Bolt Composite Disc Couplings - Manual (Page 2)

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Coupling and shaft alignment should be checked periodically due to foundation settling,
equipment shifting, etc. Alignment should be re-checked after the first several hours of
operation.
6. Install the disc pack between the hubs. Three bolts connect the disc pack to each hub (6 bolts
total). Insert the bolts thru the 3 holes of each hub and tighten the locknuts per the Table 1
tightening torque specifications. Tighten the locknuts of one hub, then those of the other hub to
approximately ½ the stated torque value. Next repeat the process but tightening to the full
torque value. It is also recommended to apply torque on the locknut, not the bolt. Re-check
and tighten all fasteners after several hours of operation to ensure proper tightening.
*Caution: Rotating equipment is potentially dangerous and should be properly guarded.
The user should follow all applicable safety codes and provide a suitable guard.
C ± X
A
R
DIAGRAM 2
CHECK PARALLEL MISALIGNMENT
DIAGRAM 1
CHECK ANGULAR MISALIGNMENT
DIAGRAM 3
CHECK HUB SEPARATION
Ø D
Table 1
Alignment and Assembly Specifications for Single Flex Series 6A
Recommended maximum installed misalignments Unit
C R A Tightening Torque
Outside
Diameter
See Diagram 1 See Diagram 2 See Diagram
3
(Dry values)
D
Model Inch mm Inch mm Inch mm
Wrench
Size Inch mm
6A18 0.276
0.010 7.010.25 0.001 0.03 0.016
0.41 2.5mm 18 in lb 214 Ncm 1.85 47.0
6A22 0.306
0.012 7.770.30 0.002 0.05 0.020
0.50 8mm 50 in lb 564 Ncm 2.25 57.2
6A26 0.306
0.015 7.770.38 0.003 0.08 0.023
0.58 8mm 50 in lb 564 Ncm 2.59 65.9
6A30 0.460
0.017 11.680.43 0.003 0.08 0.026
0.66 10mm 95 in lb 10.7 Nm 3.00 76.2
6A37 0.522
0.023 13.260.58 0.004 0.10 0.033
0.83 13mm 230 in lb 26 Nm 3.75 95.3
6A45 0.582
0.030 14.780.76 0.005 0.13 0.039 1.00 17mm 38 ft lb 51 Nm 4.50 114.3
6A52 0.646
0.037 16.410.94 0.006 0.15 0.046
1.20 17mm 38 ft lb 51 Nm 5.25 133.4
6A60 0.768
0.043 19.511.09 0.007 0.18 0.052
1.30 19mm 65 ft lb 88 Nm 6.00 152.4
6A67 0.860
0.050 21.841.27 0.007 0.18 0.059
1.50 19mm 65 ft lb 88 Nm 6.75 171.5
6A77 1.012
0.053 25.701.35 0.008 0.20 0.068
1.70 24mm 160 ft lb 217 Nm 7.75 196.9
6A90 1.134
0.060 28.801.52 0.010 0.25 0.079
2.00 30mm 310 ft lb 420 Nm 9.00 228.6
6A105 1.446
0.070 36.731.78 0.012 0.30 0.092
2.30 36mm 535 ft lb 725 Nm 10.50 266.7
6A120 1.536
0.083 39.012.11 0.013 0.33 0.105
2.70 36mm 535 ft lb 725 Nm 12 304.8
C