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Shaft Diameter
OD
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Overall Length
For Rotary Motion
Length
Set Screw Material
Spider Material
RoHS
DFARS Specialty Metals
Export Control Classification Number (ECCN)
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Maximum Rotation Speed
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.
Round—Hubs for the standard shaft type.
Keyed—Mount onto shafts with a matching keyway.
Iron—Best for dry environments, since moisture will cause these hubs to rust.
Steel—Best for dry environments, since moisture will cause these hubs to rust.
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 | |||
|---|---|---|---|---|---|---|---|---|
Round | ||||||||
Iron | ||||||||
| 5/8" | L035 | 13/16" | Set Screw | 1/8", 3/16", 1/4", 5/16", 3/8" | 6408K9 | 00000 | ||
| 1 5/64" | L050 | 1 23/32" | Set Screw | 1/4", 5/16", 3/8", 7/16", 5/8" | 6408K92 | 0000 | ||
| 1 23/64" | L070 | 1 63/64" | Set Screw | 1/4", 5/16", 3/8", 7/16" | 6408K118 | 00000 | ||
| 1 3/4" | L075 | 2 1/8" | Set Screw | 1/4", 5/16", 3/8", 7/16" | 6408K119 | 00000 | ||
| 2 7/64" | L090 | 2 5/32" | Set Screw | 1/4", 5/16", 3/8", 7/16" | 6408K23 | 00000 | ||
| 2 7/64" | L095 | 2 1/2" | Set Screw | 7/16" | 6408K152 | 00000 | ||
| 2 35/64" | L099 | 2 27/32" | Set Screw | 7/16" | 6408K161 | 00000 | ||
| 2 35/64" | L100 | 3 31/64" | Set Screw | 7/16" | 6408K172 | 00000 | ||
Steel | ||||||||
| 16 mm | L035 | 21 mm | Set Screw | 4 mm, 5 mm, 6 mm, 8 mm | 6133N11 | 0000 | ||
| 27 mm | L050 | 44 mm | Set Screw | 5 mm, 7 mm | 6133N12 | 0000 | ||
303 Stainless Steel | ||||||||
| 1 3/4" | L075 | 2 1/8" | Set Screw | 1/4" | 2306K131 | 000000 | ||
Keyed | ||||||||
Iron | ||||||||
| 1 5/64" | L050 | 1 23/32" | Set Screw | 1/2", 9/16", 9 mm, 10 mm, 11 mm, 12 mm, 14 mm, 15 mm, 16 mm | 6408K11 | 0000 | ||
| 1 23/64" | L070 | 1 63/64" | Set Screw | 1/2", 9/16", 5/8", 11/16", 3/4", 10 mm, 11 mm, 12 mm, 14 mm, 16 mm, 19 mm | 6408K12 | 00000 | ||
| 1 3/4" | L075 | 2 1/8" | Set Screw | 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 12 mm, 14 mm, 15 mm, 16 mm, 19 mm, 20 mm, 22 mm | 6408K13 | 00000 | ||
| 2 7/64" | L090 | 2 5/32" | Set Screw | 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 12 mm, 14 mm, 15 mm, 16 mm, 18 mm, 19 mm, 20 mm, 22 mm, 24 mm | 6408K14 | 00000 | ||
| 2 7/64" | L095 | 2 1/2" | Set Screw | 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", 19 mm, 20 mm, 24 mm, 25 mm, 28 mm | 6408K15 | 00000 | ||
| 2 35/64" | L099 | 2 27/32" | Set Screw | 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/8", 1 3/16", 22 mm, 24 mm, 28 mm | 6408K16 | 00000 | ||
| 2 35/64" | L100 | 3 31/64" | Set Screw | 1/2", 9/16", 5/8", 11/16", 3/4", 7/8", 15/16", 1", 1 1/16", 1 1/8", 1 3/16", 1 1/4", 1 5/16", 1 3/8", 24 mm, 25 mm, 28 mm, 30 mm | 6408K17 | 00000 | ||
| 3 21/64" | L110 | 4 7/32" | Set Screw | 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/8", 1 3/16", 1 1/4", 1 3/8", 1 7/16", 1 1/2", 1 9/16", 1 5/8", 19 mm, 20 mm, 24 mm, 25 mm, 28 mm, 30 mm, 32 mm, 38 mm | 6408K18 | 00000 | ||
| 3 3/4" | L150 | 4 1/2" | Set Screw | 5/8", 3/4", 7/8", 1", 1 1/16", 1 1/8", 1 3/16", 1 1/4", 1 3/8", 1 7/16", 1 1/2", 1 9/16", 1 5/8", 1 11/16", 1 3/4", 1 7/8", 24 mm, 38 mm, 42 mm | 6408K19 | 000000 | ||
| 4 1/2" | L190 | 4 7/8" | Set Screw | 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 7/16", 1 1/2", 1 5/8", 1 3/4", 1 7/8", 1 15/16", 2", 2 1/8" | 6408K21 | 000000 | ||
| 5" | L225 | 5 11/32" | Set Screw | 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 7/16", 1 1/2", 1 5/8", 1 3/4", 1 7/8", 1 15/16", 2", 2 1/8", 2 3/16", 2 1/4", 2 3/8", 2 7/16", 2 1/2", 2 5/8" | 6408K22 | 000000 | ||
Steel | ||||||||
| 35 mm | L070 | 51 mm | Set Screw | 17 mm | 6133N117 | 00000 | ||
| 45 mm | L075 | 54 mm | Set Screw | 10 mm | 6133N119 | 00000 | ||
| 45 mm | L075 | 54 mm | Set Screw | 11 mm | 6133N14 | 00000 | ||
| 54 mm | L090 | 54 mm | Set Screw | 10 mm | 6133N123 | 00000 | ||
| 54 mm | L090 | 54 mm | Set Screw | 25 mm | 6133N124 | 00000 | ||
| 54 mm | L095 | 64 mm | Set Screw | 11 mm, 12 mm, 14 mm, 15 mm, 16 mm, 17 mm, 22 mm | 6133N16 | 00000 | ||
| 65 mm | L099 | 73 mm | Set Screw | 15 mm, 16 mm, 19 mm, 20 mm, 30 mm | 6133N17 | 00000 | ||
| 65 mm | L100 | 89 mm | Set Screw | 12 mm, 16 mm, 20 mm, 22 mm, 32 mm, 35 mm | 6133N18 | 00000 | ||
| 85 mm | L110 | 108 mm | Set Screw | 22 mm, 35 mm, 40 mm, 42 mm | 6133N19 | 00000 | ||
| 96 mm | L150 | 115 mm | Set Screw | 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 48 mm | 6133N21 | 00000 | ||
| 115 mm | L190 | 124 mm | Set Screw | 24 mm, 30 mm, 32 mm, 35 mm, 38 mm, 40 mm, 42 mm, 55 mm | 6133N22 | 000000 | ||
| 127 mm | L225 | 137 mm | Set Screw | 32 mm, 38 mm, 40 mm, 42 mm, 45 mm, 48 mm, 50 mm, 55 mm, 60 mm | 6133N23 | 000000 | ||
303 Stainless Steel | ||||||||
| 1 3/4" | L075 | 2 1/8" | Set Screw | 1/2", 5/8", 3/4", 7/8" | 3507N9 | 000000 | ||
| 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 | ||
| 3 21/64" | L110 | 4 7/32" | Set Screw | 1", 1 1/8", 1 3/8", 1 1/2", 1 5/8" | 2306K18 | 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 | ||
Machinable Bore Hubs
 |
OD | Shaft Coupling Trade Size | Overall Lg. | Choose a Shaft Dia. | Shaft Mount Type | Each | |||
|---|---|---|---|---|---|---|---|---|
Round | ||||||||
Sintered Iron | ||||||||
| 1 5/64" | L050 | 1 23/32" | 1/4" to 5/8" | Set Screw | 3530N111 | 000000 | ||
| 1 23/64" | L070 | 1 63/64" | 1/4" to 3/4" | Set Screw | 3530N112 | 00000 | ||
| 1 3/4" | L075 | 2 1/8" | 1/4" to 7/8" | Set Screw | 3530N113 | 00000 | ||
| 2 7/64" | L090 | 2 5/32" | 1/4" to 1" | Set Screw | 3530N114 | 00000 | ||
| 2 7/64" | L095 | 2 1/2" | 7/16" to 1 1/8" | Set Screw | 3530N115 | 00000 | ||
| 2 35/64" | L099 | 2 27/32" | 7/16" to 1 3/16" | Set Screw | 3530N116 | 00000 | ||
| 2 35/64" | L100 | 3 31/64" | 7/16" to 1 3/8" | Set Screw | 3530N117 | 00000 | ||
| 3 21/64" | L110 | 4 7/32" | 5/8" to 1 5/8" | Set Screw | 3530N118 | 000000 | ||
| 3 3/4" | L150 | 4 1/2" | 5/8" to 1 7/8" | Set Screw | 3530N119 | 000000 | ||
| 4 1/2" | L190 | 4 7/8" | 3/4" to 2 1/8" | Set Screw | 3530N121 | 000000 | ||
Cast Iron | ||||||||
| 5" | L225 | 5 11/32" | 3/4" to 2 5/8" | Set Screw | 3530N122 | 000000 | ||
Spiders
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A flexible center fits between hubs to enable torque transfer and damp vibration.
Buna-N—Highly tear resistant and the best choice to absorb vibration and shock.
Metal-Impregnated Buna-N—Vibration damping and highly tear resistant. The rubber contains metal, so it will trigger a metal detector if a piece contaminates your batch.
Misalignment Capability | |||||||||
|---|---|---|---|---|---|---|---|---|---|
For Hub OD | Shaft Coupling Trade Size | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Each | |||
Buna-N | |||||||||
| 5/8", 16 mm | L035 | 31,000 | 3 | 0.015" | 1° | 6408K61 | 00000 | ||
| 1 5/64", 27 mm | L050 | 18,000 | 26 | 0.015" | 1° | 6408K84 | 0000 | ||
| 1 23/64", 35 mm | L070 | 14,000 | 43 | 0.015" | 1° | 6408K73 | 0000 | ||
| 1 3/4", 45 mm | L075 | 11,000 | 90 | 0.015" | 1° | 6408K74 | 00000 | ||
| 2 7/64", 54 mm | L090, L095 | 9,000 | 140 | 0.015" | 1° | 6408K75 | 00000 | ||
| 2 17/32", 2 35/64", 65 mm | L099, L100 | 7,000 | 315 | 0.015" | 1° | 6408K77 | 00000 | ||
| 3 21/64", 85 mm | L110 | 5,000 | 790 | 0.015" | 1° | 6408K79 | 00000 | ||
| 3 3/4", 96 mm | L150 | 5,000 | 1,240 | 0.015" | 1° | 6408K81 | 00000 | ||
| 4 1/2", 115 mm | L190 | 5,000 | 1,725 | 0.015" | 1° | 6408K82 | 00000 | ||
| 5", 127 mm | L225 | 4,200 | 2,340 | 0.015" | 1° | 6408K62 | 00000 | ||
Metal-Impregnated Buna-N | |||||||||
| 1 3/4", 45 mm | L075 | 3,600 | 80 | 0.015" | 1° | 3507N39 | 00000 | ||
| 2 1/8", 54 mm | L090, L095 | 3,600 | 185 | 0.015" | 1° | 3507N4 | 00000 | ||
| 2 17/32", 65 mm | L099, L100 | 3,600 | 415 | 0.015" | 1° | 3507N41 | 00000 | ||
Splined-to-Keyed Spider Couplings
 |  |
Diameter |
Connect heavy duty machinery with splined shafts to components with keyed shafts—a hydraulic pump and an electric motor, for example. A central spider damps vibration, absorbs shock, and adjusts for misalignment. No lubrication required. For a complete coupling, select two hubs and one spider. Choose components of the same trade size to ensure they'll fit together.
Hubs
 |
The metal body mounts onto shafts to transmit torque from one shaft to the other through the flexible center.
Iron—Best for dry environments, since moisture will cause these hubs to rust.
Hubs | Keyed Hubs | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
OD | Shaft Coupling Trade Size | Overall Lg. | Choose a Shaft Dia. | Each | Choose a Shaft Diameter | Each | ||||
Iron | ||||||||||
| 2 7/64" | L090 | 2 3/16" | A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754") | 9843T101 | 000000 | 3/8", 1/2", 5/8", 3/4", 1" | 3451N801 | 000000 | ||
| 2 17/32" | L099 | 2 7/8" | A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754"), BB (X 1", Y 0.877") | 9843T301 | 00000 | 1/2", 5/8", 3/4", 1", 1 1/8" | 3451N802 | 00000 | ||
| 3 3/4" | L150 | 4 1/2" | A (X 5/8", Y 0.509"), B (X 7/8", Y 0.754"), BB (X 1", Y 0.877"), C (X 1 1/4", Y 1.087"), D (X 1 3/4", Y 1.506"), E (X 1 3/4", Y 1.506") | 9843T601 | 000000 | 5/8", 3/4", 1", 1 1/8", 1 1/4", 1 1/2", 1 3/4" | 3451N803 | 00000 | ||
