CAD Drawings

For use with all Standard Lovejoy Continuous Sleeve Gear coupling types (C, CFR, CMM, CSPCR, CSHP, etc).

The Continuous Sleeve Gear Coupling Accessory Kits include 2 seals and 2 lock rings.

Note: Accessory Kits DO NOT include gear coupling grease. Gear coupling grease is essential for satisfactory gear coupling operation, and must be purchased separately.

For use with all Standard Lovejoy Continuous Sleeve Gear coupling types (C, CFR, CMM, CSPCR, CSHP, etc).

Note: Seals are included in Continuous Sleeve Gear Coupling Accessory Kits, and are generally not ordered as a stand alone item.

For use with all Standard Lovejoy Continuous Sleeve Gear coupling types (C, CFR, CMM, CSPCR, CSHP, etc).

Note: Lock Rings are included in Continuous Sleeve Gear Coupling Accessory Kits, and are generally not ordered as a stand alone item.

• 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

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.

The C Type coupling consists of two flex hubs, one sleeve and one accessory kit consisting of seals and snap rings.

• Basis for all types of Lovejoy / Sier-Bath Continuous Sleeve Couplings
• Low profile compact design is easy to implement
• Single (flex-rigid) or double (flex-flex) engagement

• Basis for all types of Lovejoy / Sier-Bath Continuous Sleeve Couplings
• Low profile compact design is easy to implement
• Single (flex-rigid) or double (flex-flex) engagement

• Basis for all types of Lovejoy / Sier-Bath Continuous Sleeve Couplings
• Low profile compact design is easy to implement
• Single (flex-rigid) or double (flex-flex) engagement

• Basis for all types of Lovejoy / Sier-Bath Continuous Sleeve Couplings
• Low profile compact design is easy to implement
• Single (flex-rigid) or double (flex-flex) engagement

• Basis for all types of Lovejoy / Sier-Bath Continuous Sleeve Couplings
• Low profile compact design is easy to implement
• Single (flex-rigid) or double (flex-flex) engagement

• Basis for all types of Lovejoy / Sier-Bath Continuous Sleeve Couplings
• Low profile compact design is easy to implement
• Single (flex-rigid) or double (flex-flex) engagement

• Basis for all types of Lovejoy / Sier-Bath Continuous Sleeve Couplings
• Low profile compact design is easy to implement
• Single (flex-rigid) or double (flex-flex) engagement

• Basis for all types of Lovejoy / Sier-Bath Continuous Sleeve Couplings
• Low profile compact design is easy to implement
• Single (flex-rigid) or double (flex-flex) engagement

CMM Type Mill Motor Couplings

The CMM Type coupling consists of one standard flex hub, one universal hub, one standard sleeve and one accessory kit consisting of seals and snap rings.

• Designed with longer universal hub on one end to accommodate straight or tapered shafts
• Standard hub and sleeve on the other end
• Universal hub bored to customer specifications
• Available with longer universal hubs on both ends

CMM Type Mill Motor Couplings

The CMM Type coupling consists of one standard flex hub, one universal hub, one standard sleeve and one accessory kit consisting of seals and snap rings.

• Designed with longer universal hub on one end to accommodate straight or tapered shafts
• Standard hub and sleeve on the other end
• Universal hub bored to customer specifications
• Available with longer universal hubs on both ends

CMM Type Mill Motor Couplings

The CMM Type coupling consists of one standard flex hub, one universal hub, one standard sleeve and one accessory kit consisting of seals and snap rings.

• Designed with longer universal hub on one end to accommodate straight or tapered shafts
• Standard hub and sleeve on the other end
• Universal hub bored to customer specifications
• Available with longer universal hubs on both ends

CMM Type Mill Motor Couplings

The CMM Type coupling consists of one standard flex hub, one universal hub, one standard sleeve and one accessory kit consisting of seals and snap rings.

• Designed with longer universal hub on one end to accommodate straight or tapered shafts
• Standard hub and sleeve on the other end
• Universal hub bored to customer specifications
• Available with longer universal hubs on both ends

CCS Type Cut-Out Shifter Couplings


The CCS Type coupling consists of two flex hubs, one special sleeve without lubrication holes and one accessory kit which includes a special seal for the hub that disengages to eliminate undue friction when the disengaged hub is turning in the sleeve. Standard hub is hand packed with grease.

• Designed for quick disengagement between the driver and driven equipment
• Special seal in disengagement hub to prevent undue friction when hub turns in sleeve
• Widely used on dual drive operations and equipment operating in tandem
• Available with pins to maintain sleeve in engaged and disengaged positions
• Shifting mechanisms available upon request

The CFR Type coupling consist of one flex hub, one rigid hub, one sleeve, one accessory kit consisting of seals and snap rings.