Goodrich Rome

104 Otis Street
Rome, NY 13441-4714
Phone: 315-838-1200
Fax: 315-838-1477

Commercial Couplings Selection Procedure

The selection procedure involves 5 steps:

Required Data
Torque Calculation
Coupling Selection
Bore Capacity
Misalignments
Contact Goodrich

Step 1 - Required Data

Maximum Power	___ KW or HP	Parallel Offset	___ Inch
Speed Range	___ RPM	Angular Misalign	___ Degrees
Trip Speed	___ RPM	Distance Between Shaft Ends (BSE)	___ Inch
Axial Movement		Driver Shaft End Dia. (Straight or Taper)	___ Inch
-Driver Machine	___Inch	Load Shaft End Dia. (Straight or Taper)	___ Inch
-Load Machine	___Inch	Envelope Minimum Diameter	___ Inch

Special Requirements

Torquemeter, Electric Isolation, Shear Section, Backup Gear Drive

API 671 Required [ ] Yes [ ] No
API 610 Required [ ] Yes [ ] No

Step 2 - Torque Calculation

Calculate the normal continuous torque. (KW x 1.341 = HP)

T =(_(HP)_ (63,025)______ ) / (Speed at which HP occurs) Lb-in

For situations where the HP changes over the speed range, the condition generating the maximum continuous torque must be determined.

Electric motor starts, generator short circuit, compressor surge, and pump Cavitation cause single cycle peak torque requirements. This value may mandate a larger coupling selection, based upon the peak torque values each coupling.

Step 3 - Coupling Selection

Select the coupling from page 3 or page 5 which has the maximum continuous torque greater than the calculated normal continuous torque with specified application factor.

Step 4 - Bore Capacity

Verify the maximum bore capacity of the coupling selected is greater than the bores specified.

Step 5 - Misalignments

Verify that the coupling selected meets the angular and axial misalignments of the application.

Step 6 - Contact Goodrich

Goodrich will supply Coupling Selection Data Sheet in Imperial or SI units; including mass elastic, lateral and axial natural frequencies within 24 hours for standard designs!

E-mail: info.rome@goodrich.com