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    Saga is a general purpose, torsionally soft coupling with high tolerance to all forms of misalignment. The design features hexagonal or octagonal rubber donut-shaped elements with metal inserts positioned at each apex during the vulcanization process. These metal inserts carry actual bolts which fix the element to tines on cast, cylindrical hubs. Embedded inserts also have tines which connect with mating surfaces on hubs so that axial bolts can be easily torqued during assembly without twisting the rubber beyond the limits of its elasticity. The rubber between each apex is pre-compressed, so it is much more durable to the stresses arising from the various forms of misalignment and torsional vibrations.
    Note: A complete Saga coupling is comprised of 2 hubs, an elastomeric donut, and hardware.
Unit of Measure

Specifications

Description 

 N/A SAGA-13-DONUT-W/HDWR

Coupling Type

 N/A Torsional

Material

 N/A Natural Rubber

Type

 N/A Flexible

Color

 N/A Black

Insert Style

 N/A Donut Type

# of Bolts

 N/A 6

Weight

 N/A 1.13 lb

Complete Coupling Weight

 N/A 6.50 lb

Dimensional Data

Bolt Size

 N/A 3/8-16 x 2

Cubic inches

 N/A 22.34845 in³

Dimensional Data of Related Coupling

Coupling

 N/A S13

Set Screw Thread Size (Dimension T)

 N/A No Setscrew

Outside Diameter

 N/A 4.280 in

Overall Length

 N/A 5.220 in

Max. Bore (Dimensions ID1/ID2)

 N/A 1.375 in35.00 mm

Dimension BC

 N/A 3.060 in77.72 mm

Dimension HD

 N/A 2.250 in

Dimension L

 N/A 1.310 in33.27 mm

Dimension W

 N/A 1.220 in30.99 mm

Performance Data

Normal Temperature Range

 N/A -60 to 200 ºF

Bolt Grade

 N/A # 5

Performance Data of Related Coupling

Rated Torque at 1.0 SF

 N/A 600.00 in·lb

Max. Shock Load

 N/A 1800.00 in·lb

Recommended Torque (Wet)

 N/A 23.00 ft·lb

Recommended Torque (Dry)

 N/A 30.00 ft·lb

Max. Speed

 N/A 8400.00 rpm

Dynamic Torsional Stiffness

 N/A 67.00 in·lb/deg3839.00 in·lb/rad

Specific Torsional Stiffness

 N/A 6.40 in·lb/rad

Moment of Inertia WR2

 N/A 6.600 lb·in²

Rated Torque for 1.0 Service Factor

 N/A 600.0000 in·lb

Rated HP at 100 rpm for 1.0 Service Factor

 N/A 0.95 hp

Coupling Design

Coupling Design

 N/A Elastomeric Pre-compression Type
    Saga is a general purpose, torsionally soft coupling with high tolerance to all forms of misalignment. The design features hexagonal or octagonal rubber donut-shaped elements with metal inserts positioned at each apex during the vulcanization process. These metal inserts carry actual bolts which fix the element to tines on cast, cylindrical hubs. Embedded inserts also have tines which connect with mating surfaces on hubs so that axial bolts can be easily torqued during assembly without twisting the rubber beyond the limits of its elasticity. The rubber between each apex is precompressed, so it is much more durable to the stresses arising from the various forms of misalignment and torsional vibrations.

    While the Saga coupling is normally associated with shaft-to-shaft applications, adaptations for flange and flywheel mountings can be made. In addition, a floating shaft version for use in lieu of a universal joint drive shaft with separate torsional coupling is available. Its elements can also be stacked in series for use in applications with extreme transient or permanent parallel misalignment, or where torsional dynamics demand an extremely soft element for proper damping and/or vibratory decoupling. The rubber’s stiffness of 60 as measured against Shore A by durometer, covers the majority of such situations.

Features

Features 

 N/A
  • No end thrust in misalignment position
  • Absorbs misalignment and shock
  • No axial reaction force to damage or accelerate wear in system bearings
  • Accepts constant angular misalignment of up to 3°
  • Parallel tolerance of 0.060 (1.5mm), while reaction force remains low
  • Lateral softness without complication, or sacrifice of performance or durability
  • Natural rubber can operate in temperatures from -60° to 200° F (-51° to 93° C)

Notes

Notes 

 N/A
  • For applications requiring simultaneous angular and parallel misalignment, consult Lovejoy Engineering to ensure that heat generated from all three forms of stress do not exceed the coupling’s ability to dissipate heat.
  • For higher speeds, balancing may be necessary.
  • Standard bores available by 1/16 inch increments.
  • Some metric sizes also available as standard.
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