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Spider Couplings
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With two hubs gripping a rubbery spider in the center, these couplings damp vibration and transfer torque while flexing to handle misaligned shafts. The metal hubs never touch each other, so there's no need for lubrication. Also known as Lovejoy® couplings. For a complete coupling, select two hubs and one spider or two hubs, one split spider, and one retaining ring. Choose components with the same trade size to ensure they'll fit together.
Hubs
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The metal body mounts onto shafts to transmit torque from one shaft to the other through the flexible center.
Keyed—Mount onto shafts with a matching keyway.
303 Stainless Steel—These corrosion-resistant hubs withstand mild cleaning solutions.
Set-Screw Shaft Mount—Screws dig into your shaft for a secure hold.
OD | Shaft Coupling Trade Size | Overall Lg. | Shaft Mount Type | Choose a Shaft Dia. | Each | |||
|---|---|---|---|---|---|---|---|---|
Keyed | ||||||||
303 Stainless Steel | ||||||||
| 1 3/4" | L075 | 2 1/8" | Set Screw | 1/2", 5/8", 3/4", 7/8" | 3507N9 | 0000000 | ||
| 2 1/8" | L095 | 2 1/2" | Set Screw | 1/2", 5/8", 3/4", 7/8", 1", 1 1/8" | 3507N615 | 000000 | ||
| 2 17/32" | L100 | 3 1/2" | Set Screw | 3/4", 1", 1 1/4", 1 3/8" | 3507N815 | 000000 | ||
| 45 mm | L075 | 54 mm | Set Screw | 14 mm, 19 mm, 20 mm, 22 mm | 6953N111 | 000000 | ||
| 54 mm | L095 | 64 mm | Set Screw | 20 mm, 22 mm, 24 mm | 6953N181 | 000000 | ||
| 65 mm | L100 | 89 mm | Set Screw | 20 mm, 24 mm, 25 mm | 6953N281 | 000000 | ||
Sanitary Sealed Single U-Joints
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Replacement Covers |
Often found in food, cosmetic, and pharmaceutical plants, these U-joints connect misaligned shafts in sanitary environments. Their stainless steel body won't corrode from frequent washdowns with harsh chemicals and is highly polished, so there's no crevices for bacteria to grow. Their lubricant is NSF registered H1 for incidental contact with food. A heat- and water-resistant silicone cover (sometimes called a boot or bellows) seals this lubricant in and keeps out contaminants.
They’re single U-joints, so they connect and transfer torque between two shafts that are misaligned at an angle. A good choice for applications that run continuously, they operate at higher speeds and last longer than other types of joints, thanks to their needle bearings. Since they come lubricated, you won’t need to lubricate them during installation. Connect them to shafts using the included set screws. Unlike U-joints that use spring pins, there’s no drilling required.
Your shafts’ misalignment will affect the speed and torque the U-joint will be able to transmit. The more the shafts are misaligned, the less speed and torque the U-joint will be able to transmit.
FDA Compliant 21 CFR 177.2600—FDA-compliant U-joints have a cover that is safe for direct contact with food.
U-Joints | Replacement Covers | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Shaft | Keyway | Torque | ||||||||||||||||||
Dia. | Dp. | Joint Dia. | Overall Lg. | OD | Wd. | Dp. | Max. Operating Angle | Max. Rotation Speed, rpm | Max. Torque, in·lbf | 3° Operating Angle | 10° Operating Angle | Bellows Material | Joint Type | For Shaft Type | Each | Each | ||||
316 Stainless Steel with Steel Bearings | ||||||||||||||||||||
FDA Compliant 21 CFR 177.2600 U-Joints | ||||||||||||||||||||
| 3/8" | 15/16" | 3/4" | 2 11/16" | 1 3/8" | 3/32" | 3/64" | 35° | 6,000 | 95 | 28 in·lbf @ 1,000 rpm | 19 in·lbf @ 1,000 rpm | Silicone Rubber | Needle Bearing | Keyed | 7376N11 | 0000000 | 7376N16 | 000000 | ||
| 1/2" | 1 3/16" | 1" | 3 3/8" | 1 1/2" | 1/8" | 1/16" | 35° | 6,000 | 215 | 110 in·lbf @ 1,000 rpm | 77 in·lbf @ 1,000 rpm | Silicone Rubber | Needle Bearing | Keyed | 7376N12 | 000000 | 7376N17 | 00000 | ||
| 5/8" | 1 1/4" | 1 1/4" | 3 3/4" | 1 7/8" | 3/16" | 3/32" | 35° | 6,000 | 700 | 275 in·lbf @ 1,000 rpm | 185 in·lbf @ 1,000 rpm | Silicone Rubber | Needle Bearing | Keyed | 7376N13 | 000000 | 7376N18 | 00000 | ||
U-Joints | ||||||||||||||||||||
| 3/4" | 1 3/8" | 1 1/2" | 4 1/4" | 2 1/4" | 3/16" | 3/32" | 35° | 6,000 | 1,780 | 545 in·lbf @ 1,000 rpm | 370 in·lbf @ 1,000 rpm | Silicone Rubber | Needle Bearing | Keyed | 7376N14 | 000000 | 7376N19 | 00000 | ||
| 1" | 1 11/16" | 2" | 5 1/2" | 2 11/16" | 1/4" | 1/8" | 35° | 6,000 | 4,300 | 1,050 in·lbf @ 1,000 rpm | 705 in·lbf @ 1,000 rpm | Silicone Rubber | Needle Bearing | Keyed | 7376N15 | 00000000 | 7376N21 | 000000 | ||
