Lovejoy Coupler, L100 X 7/8"

The L100.875 Lovejoy Coupler (L100 × 7/8") is a jaw-type coupling hub designed to provide reliable power transmission with vibration dampening using a flexible elastomer “spider” insert. Built from sintered iron with a 3-jaw design and an SOX (NBR/Buna-N) rubber elastomeric member, it helps reduce shock loads while remaining fail-safe—continuing to perform even if the elastomer fails. Its Buna-N spider material is oil resistant and operates across a wide temperature range, making it a solid choice for industrial and agricultural driveline applications.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: L100.875 (Description: L100-HUB-7/8-3/16X3/32KW)
• Brand: Lovejoy
• Coupling Type: Jaw
• Hub Style: Style 1
• Material: Sintered iron
• Color/Finish: Metallic
• Number of Jaws: 3
• Elastomeric Member: SOX (NBR/Buna-N) rubber
• Bore Size: 7/8"
• Keyway Size (W × D): 3/16" × 3/32"
• Length Through Bore: 1.38" (35.05 mm)
• Hub Length: 2.09" (53.09 mm)
• Overall Length: 3.480" (88.39 mm)
• Outside Diameter: 2.54" (64.52 mm)
• Min Bore Range (ID1/ID2): 0.437" (11.00 mm)
• Max Bore Range (ID1/ID2): 1.375" (35.00 mm)
• Dimension G: 0.71" (18.03 mm)
• Dimension SL: 0.440" (11.18 mm)
• Dimension T: 5/16-18
• Cubic Inches: 13.48384 in³
• Weight (Hub): 1.46 lb
• Weight (Complete Coupling, Max Bores): 3.20 lb
• Weight (Complete Coupling, Min Bores): 2.40 lb
• Nominal Torque: 417 in·lb
• Max Speed: 7000 rpm
• Rated HP @ 100 rpm: 0.66 hp
• Rated HP @ 1,200 rpm: 7.92 hp
• Rated HP @ 1,800 rpm: 11.90 hp
• Rated HP @ 3,600 rpm: 23.76 hp
• Spider Material Notes: Buna-N (NBR) operates -40°F to 212°F (-40°C to 100°C) and offers good oil resistance

Ideal For

• Power transmission setups needing shock and vibration dampening (jaw + elastomer design)
• Applications where oil resistance and wide temp performance matter (Buna-N spider)
• Driveline assemblies requiring a 7/8" bore with 3/16" × 3/32" keyway
• Environments with oil, dirt, sand, moisture, or grease where resilient couplings are preferred
• Systems that benefit from a fail-safe coupling with no metal-to-metal contact