Lovejoy Coupler, L090 X 3/4"

The Lovejoy L090.750 Coupler Hub is a jaw-style coupling hub designed for dependable power transmission with smooth, vibration-damping performance when paired with the proper elastomer “spider.” This Style 1, L090 size hub features a 3/4" bore with a 3/16" keyway and is intended for use with SOX (NBR/Buna-N) rubber spiders for excellent oil resistance and flexible torque transfer. It’s also fail-safe, meaning it can keep working even if the elastomer fails—because quitting is not an approved feature in driveline parts.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: L090.750
• Description: L090-HUB-0.749/0.750-3/16X3/32KW
• Brand: Lovejoy
• Coupling Type: Jaw
• Coupling Size: L090
• Hub Style: Style 1
• Material: Sintered Iron
• Color / Finish: Metallic
• # of Jaws: 3
• Elastomeric Member: SOX (NBR/Buna-N) Rubber (spider)
• Bore Size: 3/4 in
• Keyway Size (W × D): 3/16 × 3/32 in
• Length Thru Bore: 0.82 in (20.83 mm)
• Overall Length: 2.150 in (54.61 mm)
• Outside Diameter: 2.11 in (53.59 mm)
• Hub Length: 1.32 in (33.53 mm)
• Min. Bore (ID1/ID2): 0.250 in (6 mm)
• Max. Bore (ID1/ID2): 1.000 in (25.00 mm)
• Dimension G: 0.52 in (13.21 mm)
• Dimension SL: 0.440 in (11.18 mm)
• Dimension T: 1/4-20
• Volume: 5.87677 in³
• Weight (Hub): 0.57 lb
• Weight (Complete Coupling, max bores): 1.50 lb
• Weight (Complete Coupling, min bores): 1.20 lb
• Nominal Torque: 144 in·lb
• Max Speed: 9000 rpm
• Rated HP @ 100 rpm: 0.23 hp
• Rated HP @ 1,200 rpm: 2.76 hp
• Rated HP @ 1,800 rpm: 4.11 hp
• Rated HP @ 3,600 rpm: 8.28 hp
• Spider Material Notes (NBR/Buna-N): Oil-resistant, flexible; operating range -40°F to 212°F (-40°C to 100°C)

Ideal For

• Power transmission setups needing a 3/4" bore jaw coupling hub
• Applications where vibration damping and misalignment tolerance are important
• Equipment exposed to oil, dirt, moisture, sand, or grease
• Users who want no metal-to-metal contact when properly assembled with the spider
• Anyone who prefers their coupler to work quietly in the background instead of starring in the breakdown story