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Continuous Sleeve Series

  • Simple and inexpensive all steel type of gear coupling constructed with a single sleeve and 2 hubs
  • Comparatively simple installation
  • Precision cut 20° pressure angle gear teeth with minimum backlash
  • Most standard configurations are available as stock items
  • Angular misalignment of 1/2° per gear mesh (flex-plane)
  • Sizes 7/8 through 12, to accommodate bore sizes up to and including 12.50 inches
  • Interference fit (standard) and Clearance fit on bores are available
  • Load Capacities range from 2,500 in-lbs up to 2,520,000 in-lbs
  • Designs for applications requiring horizontal and vertical orientation, full-flex, flex-rigid, mill-motor, disengagement, sliding hubs, Shear Pin, floating shaft, and spacers
  • Patented and tested BUNA N seal design with reinforced washers bonded to the inside edges which positively retain lubricant and seal the interior from outside contaminants
  • Reinforced rubber seals with snap rings to hold in lubricant
  • Two snap rings made of hardened spring steel which securely hold the coupling together, are easy to install or remove, yet withstand 100,000 pounds of end thrust
  • Inch and Metric bore sizes available
Standard Types and Sizes

    Lovejoy / Sier-Bath couplings are stocked in an assortment of configurations which include C and F standard hubs and sleeves, Mill Motor hubs, Vertical style, Floating Shaft, and Spacer designs. Lovejoy’s superb engineering staff make it possible to support many additional coupling types such as the Brakedrum type, Sliding Hub type, Shear Pin type, Jordan type, and custom lengths for non standard shaft separations.

    Additional size ranges and designs to meet unusual application requirements can also be manufactured by Lovejoy to meet market demands. Material can range from standard steel to alloy steel and even stainless steel. The exceptional simplicity of the Lovejoy coupling design make this all possible.
C Type Flex-Flex Couplings
    The C Type coupling consists of two flex hubs, one sleeve and one accessory kit consisting of seals and snap rings.
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Dimension LS (in)

Dimension LS (mm)

Part Number



Dimension LS

Outside Diameter

Overall Length

Max. Bore (Dimensions ID1/ID2)

Nominal Torque


69790400042 N/A C 7/8 SLEEVE N/A 7/8 in N/A 2.000 in50.80 mm N/A 3.31 in3.31 mm N/A 3.130 in79.50 mm N/A 1.25 in31 mm N/A 2500.00 in·lb N/A CAD
69790400062 N/A C 1.5 SLEEVE N/A 1 1/2 in N/A 2.530 in64.26 mm N/A 3.75 in3.75 mm N/A 3.75 in95.25 mm N/A 1.630 in42 mm N/A 7600 in·lb N/A
69790400088 N/A C 2 SLEEVE N/A 2 in N/A 2.560 in65.02 mm N/A 4.750 in4.75 mm N/A 4.25 in107.95 mm N/A 2.130 in56 mm N/A 20200.00 in·lb N/A CAD
69790400107 N/A C 2.5 SLEEVE N/A 2 1/2 in N/A 3.060 in77.72 mm N/A 5.500 in5.50 mm N/A 4.750 in120.65 mm N/A 2.630 in70.00 mm N/A 30200.00 in·lb N/A
69790400114 N/A C 3 SLEEVE N/A 3 in N/A 3.750 in95.25 mm N/A 6.630 in6.63 mm N/A 5.500 in139.70 mm N/A 3.13 in84.00 mm N/A 50400.00 in·lb N/A CAD
69790400119 N/A C 3.5 SLEEVE N/A 3 1/2 in N/A 4.000 in101.60 mm N/A 7.500 in7.50 mm N/A 8.750 in222.25 mm N/A 3.630 in97.00 mm N/A 88200.00 in·lb N/A
69790400123 N/A C 4 SLEEVE N/A 4 in N/A 4.630 in117.60 mm N/A 8.750 in8.75 mm N/A 9.000 in228.60 mm N/A 4.130 in111.00 mm N/A 126000.00 in·lb N/A
69790400126 N/A C 4.5 SLEEVE N/A 4 1/2 in N/A 4.880 in123.95 mm N/A 9.500 in9.50 mm N/A 10.250 in260.35 mm N/A 4.750 in130.00 mm N/A 184000.00 in·lb N/A
69790400130 N/A C 5 SLEEVE N/A 5 in N/A 5.750 in146.05 mm N/A 10.750 in10.75 mm N/A 12.250 in311.15 mm N/A 5.750 in160.00 mm N/A 270900.00 in·lb N/A
69790400430 N/A C 6 SLEEVE N/A 6 in N/A 6.500 in165.10 mm N/A 12.250 in12.25 mm N/A 13.000 in330.20 mm N/A 6.750 in186.00 mm N/A 378000.00 in·lb N/A
69790400881 N/A C 7 SLEEVE N/A 7 in N/A 7.500 in190.50 mm N/A 14.000 in14.00 mm N/A 14.880 in377.95 mm N/A 7.500 in200 mm N/A 598500.00 in·lb N/A
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