# Coupling Performance Guide | C-Flex Bearing Co., Inc. Referring to the Coupling Performance Guide Chart, this gives a maximum continuous torque capacity for indefinite life of 95 lb-in (180 lb-in x 0.53). If this performance rating is not sufficient, pick another size coupling and re-calculate.

1. Calculate % Maximum Parallel Misalignment
= Max. expected parallel misalignment/ Coupling Max. parallel misalignment capacity
2. Calculate % Maximum Axial Misalignment
= Max. expected axial misalignment/ Coupling Max. axial misalignment capacity
3. Calculate % Maximum Angular Misalignment
= Max. expected angular misalignment/ Coupling Max. angular misalignment capacity
4. Determine % Maximum Coupling Misalignment
= % Max Parallel Misalignment + % Max Axial Misalignment + % Max Angular Misalignment

EXAMPLE: An application for a 2″ coupling will have the following possible misalignments:
Parallel: 0.002, axial: 0.005, angular: 2 deg.

Calculating the Total Maximum Coupling Misalignment:
Parallel: 0.002/ 0.025 = 8%
Axial: 0.005/ 0.050 = 10%
Angular: 2 deg. / 7 deg. = 29%
Total Maximum Coupling Misalignment = 47%