Measurement and Control Systems
    The torsional stiffness of the GS Series coupling provides zero backlashes needed for the accuracy for measurement and control systems. The low torques of these applications give the GS Series the ability to provide zero backlashes due to the elastomeric pre-stress.
Servo and Positioning Drives
    The GS Series provides a zero backlash, flexible connection for servo and positioning drives. An added benefit of the GS Series is its damping capabilities.
    For applications that have vibrations at critical speeds, the GS Series coupling can provide a zero backlash solution for vibration problems.
Main Spindle Drives
    The GS Series coupling is used in main spindle drives for machine tools. Torque spikes and cyclical loading are handled by the GS Series by damping or by shifting the vibratory frequency range to a non-critical speed range.
The GS Series can be used in a variety of different applications requiring precision and accuracy.

The GS Series spider features a straight center of the spider tooth, providing higher stiffness due to coupling prestress. The crowning of the ends of the spider legs allows for misalignment, while the curved jaws and solid spider center provide high-speed capability.The jaws of the hubs and the spider legs are chamfered to provide easy assembly. The GS Series coupling design also allows the blind assembly in tight spaces. Raised spider dots on the legs of the spider ensure proper spacing of hubs and spider.

Proper installation of the coupling can provide isolation of electrical currents. Check the CL dimension listed on this page to ensure the proper spacing between spiders and hubs.

The GS Series coupling has spiders available in four different shore hardnesses. Each spider offers benefits for different vibratory, environmental, and torque transmission requirements.
Unit of Measure

Specifications

Description 

N/A GS 28/38B HUB AL 3/4 3/16KW

Hub Style

N/A B

Type

N/A Curved Jaw Coupling Hubs

Hub Material

N/A Aluminum

Style

N/A Bored

Color

N/A Silver

Bore Type

N/A Solid

Coupling Type

N/A Jaw

Weight

N/A 0.64 lb

Dimensional Data

Bore Size 

N/A 3/4 in

Spider Size

N/A 28/38

Set Screw Style Coupling Size (Dimension T)

N/A 5/16-18

Set Screw Style Coupling Location Size (Dimension SL)

N/A 0.590 in14.99 mm

Keyway Size (W x D)

N/A 3/16 x 3/32 in

Length thru Bore (Dimensions LTB1/LTB2)

N/A 1.380 in35.05 mm

Outside Diameter

N/A 2.560 in65.02 mm

Overall Coupling Length

N/A 3.540 in89.92 mm

Max. Bore (Dimensions ID1/ID2)

N/A 1.5 in38 mm

Dimension CL

N/A 0.100 in2.54 mm

Dimension G

N/A 0.790 in20.07 mm

Dimension HD

N/A 2.560 in65.02 mm

Dimension TH

N/A 0.160 in4.06 mm

Cubic inches

N/A 9.04397 in³

Performance Data

Normal Temperature Range (with 92 Shore A spider)

N/A -40 to 194 ºF

Max Temp (with 92 Shore A spider)

N/A -50 to 248 ºF

Nominal Torque (with 92 Shore A spider)

N/A 840.00 in·lb

Max Torque (with 92 Shore A spider)

N/A 1680.00 in·lb

Max. Speed

N/A 5850 rpm

GS Series Hub Design Description

GS Series Hub Design Description

N/A
    Keyway With Set Screw (KW)
  • Standard Lovejoy method of securing a hub to a shaft. Clamping style recommended for backlash free torque transmission.