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Set Screw Flexible Shaft Couplings
 |  |
Hubs, Split Spider, and Retaining Ring Shown Assembled | (Each Component Sold Separately) |
 |  |
Hubs and Spider Shown Assembled | (Each Component Sold Separately) |
Each hub includes a set screw (unless noted), which bites into your shaft to hold the coupling in place. Also known as Lovejoy® couplings, these three-piece couplings have a spider-shaped cushion between two hubs to reduce shock and handle minor shaft misalignment.
A complete coupling consists of two hubs and one spider, or two hubs, one split spider, and one retaining ring (all components sold separately). Split spiders are easier to install and replace than standard spiders because there’s no need for tools or removing your hubs. Twist-lock them in place using a retaining ring.
303 Stainless Steel—303 stainless steel hubs have excellent corrosion resistance.
Buna-N—Buna-N spiders provide good vibration damping and chemical resistance.
Hytrel—Hytrel spiders provide fair vibration damping and excellent chemical resistance.
Polyurethane Rubber—Polyurethane spiders and split spiders provide fair vibration damping and good chemical resistance.
Hubs | Buna-N Spiders | Hytrel Spiders | Polyurethane Spiders | Polyurethane Split Spiders | 347 Stainless Steel Retaining Rings | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Misalignment Capability | Misalignment Capability | Misalignment Capability | Misalignment Capability | |||||||||||||||||||||||||||||||||||||||
Overall Lg. | OD | For Shaft Type | For Rotary Motion | Choose a Shaft Diameter | Each | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Temp. Range, ° F | Spider Material | Each | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Temp. Range, ° F | Spider Material | Each | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Temp. Range, ° F | Spider Material | Each | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Temp. Range, ° F | Spider Material | Each | Each | ||||||||
303 Stainless Steel Hubs | ||||||||||||||||||||||||||||||||||||||||||
| 2 1/8" | 1 3/4" | Keyed | Forward/Reverse, Start/Stop | 1/2", 5/8", 3/4", 7/8" | 2306K13 | 0000000 | 11,000 | 90 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K74 | 000000 | 3,600 | 225 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K94 | 000000 | 3,600 | 135 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K11 | 000000 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 2 1/8" | 1 3/4" | Round | Forward/Reverse, Start/Stop | 1/4" | 2306K131 | 000000 | 11,000 | 90 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K74 | 00000 | 3,600 | 225 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K94 | 00000 | 3,600 | 135 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K11 | 00000 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 2 1/2" | 2 7/64" | Keyed | Forward/Reverse, Start/Stop | 1/2", 5/8", 3/4", 1", 1 1/8" | 2306K14 | 000000 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 00000 | 3,600 | 400 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K95 | 00000 | 3,600 | 210 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K13 | 00000 | 9,200 | 670 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K33 | 000000 | 2393K23 | 000000 | ||
| 3 31/64" | 2 35/64" | Keyed | Forward/Reverse, Start/Stop | 3/4", 7/8", 1", 1 1/8", 1 3/8" | 2306K16 | 000000 | 7,000 | 315 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K77 | 00000 | 3,600 | 790 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K96 | 000000 | 3,600 | 475 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K15 | 00000 | 7,700 | 1,110 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K34 | 000000 | 2393K24 | 00000 | ||
| 4 7/32" | 3 21/64" | Keyed | Forward/Reverse, Start/Stop | 1", 1 1/8", 1 3/8", 1 1/2", 1 5/8" | 2306K18 | 000000 | 5,000 | 790 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K79 | 00000 | 3,600 | 2,265 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K97 | 000000 | 3,600 | 1,185 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K17 | 000000 | 5,900 | 2,180 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K35 | 000000 | 2393K25 | 000000 | ||
Iron Hubs | ||||||||||||||||||||||||||||||||||||||||||
| 13/16" | 5/8" | Round | Forward/Reverse, Start/Stop | 1/8", 3/16", 1/4", 5/16", 3/8" | 6408K9 | 0000 | 31,000 | 3 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K61 | 0000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 1 23/32" | 1 5/64" | Keyed | Forward/Reverse, Start/Stop | 1/2", 9/16", 9 mm, 10 mm, 11 mm, 12 mm, 14 mm, 15 mm, 16 mm | 6408K11 | 0000 | 18,000 | 26 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K84 | 0000 | 18,000 | 50 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K91 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 1 23/32" | 1 5/64" | Round | Forward/Reverse, Start/Stop | 1/4", 5/16", 3/8", 7/16", 5/8" | 6408K92 | 0000 | 18,000 | 26 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K84 | 0000 | 18,000 | 50 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K91 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 1 63/64" | 1 23/64" | Keyed | Forward/Reverse, Start/Stop | 1/2", 9/16", 5/8", 11/16", 3/4", 10 mm, 11 mm, 12 mm, 14 mm, 16 mm, 19 mm | 6408K12 | 00000 | 14,000 | 43 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K73 | 0000 | 3,600 | 110 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K93 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 1 63/64" | 1 23/64" | Round | Forward/Reverse, Start/Stop | 1/4", 5/16", 3/8", 7/16" | 6408K118 | 00000 | 14,000 | 43 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K73 | 0000 | 3,600 | 110 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K93 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 2 1/8" | 1 3/4" | Keyed | Forward/Reverse, Start/Stop | 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 | 11,000 | 90 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K74 | 00000 | 3,600 | 225 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K94 | 00000 | 3,600 | 135 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K11 | 00000 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 2 1/8" | 1 3/4" | Round | Forward/Reverse, Start/Stop | 1/4", 5/16", 3/8", 7/16" | 6408K119 | 00000 | 11,000 | 90 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K74 | 00000 | 3,600 | 225 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K94 | 00000 | 3,600 | 135 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K11 | 00000 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 2 5/32" | 2 7/64" | Keyed | Forward/Reverse, Start/Stop | 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 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 00000 | 3,600 | 400 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K95 | 00000 | 3,600 | 210 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K13 | 00000 | 9,200 | 670 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K33 | 00000 | 2393K23 | 00000 | ||
| 2 5/32" | 2 7/64" | Round | Forward/Reverse, Start/Stop | 1/4", 5/16", 3/8", 7/16" | 6408K23 | 00000 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 00000 | 3,600 | 225 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K94 | 00000 | 3,600 | 210 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K13 | 00000 | 9,200 | 670 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K33 | 00000 | 2393K23 | 00000 | ||
| 2 1/2" | 2 7/64" | Keyed | Forward/Reverse, Start/Stop | 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 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 00000 | 3,600 | 400 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K95 | 00000 | 3,600 | 210 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K13 | 00000 | 9,200 | 670 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K33 | 00000 | 2393K23 | 00000 | ||
| 2 1/2" | 2 7/64" | Round | Forward/Reverse, Start/Stop | 7/16" | 6408K152 | 00000 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 00000 | 3,600 | 400 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K95 | 00000 | 3,600 | 210 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K13 | 00000 | 9,200 | 670 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K33 | 00000 | 2393K23 | 00000 | ||
| 2 27/32" | 2 35/64" | Keyed | Forward/Reverse, Start/Stop | 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 | 7,000 | 315 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K77 | 00000 | 3,600 | 790 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K96 | 000000 | 3,600 | 475 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K15 | 00000 | 7,700 | 1,110 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K34 | 000000 | 2393K24 | 00000 | ||
| 2 27/32" | 2 35/64" | Round | Forward/Reverse, Start/Stop | 7/16" | 6408K161 | 00000 | 7,000 | 315 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K77 | 00000 | 3,600 | 790 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K96 | 000000 | 3,600 | 475 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K15 | 00000 | 7,700 | 1,110 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K34 | 000000 | 2393K24 | 00000 | ||
| 3 31/64" | 2 35/64" | Keyed | Forward/Reverse, Start/Stop | 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 | 7,000 | 315 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K77 | 00000 | 3,600 | 790 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K96 | 000000 | 3,600 | 475 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K15 | 00000 | 7,700 | 1,110 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K34 | 000000 | 2393K24 | 00000 | ||
| 3 31/64" | 2 35/64" | Round | Forward/Reverse, Start/Stop | 7/16" | 6408K172 | 00000 | 7,000 | 315 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K77 | 00000 | 3,600 | 790 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K96 | 000000 | 3,600 | 475 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K15 | 00000 | 7,700 | 1,110 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K34 | 000000 | 2393K24 | 00000 | ||
| 4 7/32" | 3 21/64" | Keyed | Forward/Reverse, Start/Stop | 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 | 5,000 | 790 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K79 | 00000 | 3,600 | 2,265 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K97 | 000000 | 3,600 | 1,185 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K17 | 000000 | 5,900 | 2,180 | 0.03" | 2° | -30 to 200 | Polyurethane Rubber | 2393K35 | 000000 | 2393K25 | 000000 | ||
| 4 1/2" | 3 3/4" | Keyed | Forward/Reverse, Start/Stop | 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 | 5,000 | 1,240 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K81 | 00000 | 3,600 | 3,705 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K98 | 000000 | 3,600 | 1,860 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K19 | 000000 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 4 7/8" | 4 1/2" | Keyed | Forward/Reverse, Start/Stop | 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 | 5,000 | 1,725 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K82 | 00000 | 5,000 | 4,680 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K99 | 000000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 5 11/32" | 5" | Keyed | Forward/Reverse, Start/Stop | 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 | 4,200 | 2,340 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K62 | 00000 | 4,200 | 6,225 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K64 | 000000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
Steel Hubs | ||||||||||||||||||||||||||||||||||||||||||
| 21 mm | 16 mm | Round | Forward/Reverse, Start/Stop | 4 mm, 5 mm, 6 mm, 8 mm | 6133N11 | 0000 | 31,000 | 3 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K61 | 0000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 44 mm | 27 mm | Round | Forward/Reverse, Start/Stop | 5 mm, 7 mm | 6133N12 | 0000 | 18,000 | 26 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K84 | 0000 | 18,000 | 50 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K91 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 51 mm | 35 mm | Keyed | Forward/Reverse, Start/Stop | 17 mm | 6133N117 | 00000 | 14,000 | 43 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K73 | 0000 | 3,600 | 110 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K93 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 54 mm | 45 mm | Keyed | Forward/Reverse, Start/Stop | 10 mm | 6133N119 | 00000 | 11,000 | 90 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K74 | 00000 | 3,600 | 225 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K94 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 54 mm | 45 mm | Keyed | Forward/Reverse, Start/Stop | 11 mm | 6133N14 | 00000 | 11,000 | 90 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K74 | 00000 | 3,600 | 225 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K94 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 54 mm | 54 mm | Keyed | Forward/Reverse, Start/Stop | 10 mm | 6133N123 | 00000 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 00000 | 3,600 | 400 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K95 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 54 mm | 54 mm | Keyed | Forward/Reverse, Start/Stop | 25 mm | 6133N124 | 00000 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 00000 | 3,600 | 400 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K95 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 64 mm | 54 mm | Keyed | Forward/Reverse, Start/Stop | 11 mm, 12 mm, 14 mm, 15 mm, 16 mm, 17 mm, 22 mm | 6133N16 | 00000 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 00000 | 3,600 | 400 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K95 | 00000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 73 mm | 65 mm | Keyed | Forward/Reverse, Start/Stop | 15 mm, 16 mm, 19 mm, 20 mm, 30 mm | 6133N17 | 00000 | 7,000 | 315 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K77 | 00000 | 3,600 | 790 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K96 | 000000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 89 mm | 65 mm | Keyed | Forward/Reverse, Start/Stop | 12 mm, 16 mm, 20 mm, 22 mm, 32 mm, 35 mm | 6133N18 | 00000 | 7,000 | 315 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K77 | 00000 | 3,600 | 790 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K96 | 000000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 108 mm | 85 mm | Keyed | Forward/Reverse, Start/Stop | 22 mm, 35 mm, 40 mm, 42 mm | 6133N19 | 00000 | 5,000 | 790 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K79 | 00000 | 3,600 | 2,265 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K97 | 000000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 115 mm | 96 mm | Keyed | Forward/Reverse, Start/Stop | 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, 48 mm | 6133N21 | 00000 | 5,000 | 1,240 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K81 | 00000 | 3,600 | 3,705 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K98 | 000000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 124 mm | 115 mm | Keyed | Forward/Reverse, Start/Stop | 24 mm, 30 mm, 32 mm, 35 mm, 38 mm, 40 mm, 42 mm, 55 mm | 6133N22 | 000000 | 5,000 | 1,725 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K82 | 00000 | 5,000 | 4,680 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K99 | 000000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
| 137 mm | 127 mm | Keyed | Forward/Reverse, Start/Stop | 32 mm, 38 mm, 40 mm, 42 mm, 45 mm, 48 mm, 50 mm, 55 mm, 60 mm | 6133N23 | 000000 | 4,200 | 2,340 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K62 | 00000 | 4,200 | 6,225 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K64 | 000000 | — | — | — | — | — | — | ——— | 0 | — | — | — | — | — | — | ——— | 0 | ——— | 0 | ||
Machinable-Bore Flexible Shaft Couplings
 |  |
(Each Component Sold Separately) |
Customize the bore of these flexible couplings to align uncommon shaft sizes as well as shafts that have become undersized from wear or oversized from coatings. Also known as Lovejoy® couplings, these three-piece couplings have a spider-shaped cushion between two hubs to reduce shock and handle minor shaft misalignment. A complete coupling consists of two hubs and one spider (all components sold separately). Fasten to your shaft with set screws (not included), which bite into the shaft for a secure hold. If the spider fails, the hubs will lock together, giving you time to shut down your equipment to prevent component damage and replace the spider. These couplings do not need lubrication.
Iron Hubs and Buna-N Spiders
Hubs | Buna-N Spiders | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Set Screw | Misalignment Capability | ||||||||||||||||
For Shaft Dia. | Overall Lg. | OD | For Rotary Motion | Fabrication | Type | Thread Size | Each | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Temp. Range, ° F | Spider Material | Each | |||
| 1/4" to 5/8" | 1 23/32" | 1 5/64" | Forward/Reverse, Start/Stop | Sintered | Cup Point | 1/4"-20 | 3530N111 | 00000 | 18,000 | 26 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K84 | 00000 | |
| 1/4" to 3/4" | 1 63/64" | 1 23/64" | Forward/Reverse, Start/Stop | Sintered | Cup Point | 1/4"-20 | 3530N112 | 00000 | 14,000 | 43 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K73 | 0000 | |
| 1/4" to 7/8" | 2 1/8" | 1 3/4" | Forward/Reverse, Start/Stop | Sintered | Cup Point | 1/4"-20 | 3530N113 | 00000 | 11,000 | 90 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K74 | 00000 | |
| 1/4" to 1" | 2 5/32" | 2 7/64" | Forward/Reverse, Start/Stop | Sintered | Cup Point | 1/4"-20 | 3530N114 | 00000 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 00000 | |
| 7/16" to 1 1/8" | 2 1/2" | 2 7/64" | Forward/Reverse, Start/Stop | Sintered | Cup Point | 5/16"-18 | 3530N115 | 00000 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 00000 | |
| 7/16" to 1 3/16" | 2 27/32" | 2 35/64" | Forward/Reverse, Start/Stop | Sintered | Cup Point | 5/16"-18 | 3530N116 | 00000 | 7,000 | 315 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K77 | 00000 | |
| 7/16" to 1 3/8" | 3 31/64" | 2 35/64" | Forward/Reverse, Start/Stop | Sintered | Cup Point | 5/16"-18 | 3530N117 | 00000 | 7,000 | 315 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K77 | 00000 | |
| 5/8" to 1 5/8" | 4 7/32" | 3 21/64" | Forward/Reverse, Start/Stop | Sintered | Cup Point | 5/16"-18 | 3530N118 | 00000 | 5,000 | 790 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K79 | 00000 | |
| 5/8" to 1 7/8" | 4 1/2" | 3 3/4" | Forward/Reverse, Start/Stop | Sintered | Cup Point | 3/8"-16 | 3530N119 | 000000 | 5,000 | 1,240 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K81 | 00000 | |
| 3/4" to 2 1/8" | 4 7/8" | 4 1/2" | Forward/Reverse, Start/Stop | Sintered | Cup Point | 1/2"-13 | 3530N121 | 000000 | 5,000 | 1,725 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K82 | 00000 | |
| 3/4" to 2 5/8" | 5 11/32" | 5" | Forward/Reverse, Start/Stop | Cast | Cup Point | 1/2"-13 | 3530N122 | 000000 | 4,200 | 2,340 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K62 | 00000 | |
Metal-Detectable Flexible Shaft Couplings
 |  |
Hubs and Spider Shown Assembled | (Each Component Sold Separately) |
Safely connect slightly misaligned shafts near food lines—the spider on these couplings contains metal, so it’ll trigger a metal detector if a piece frays off and contaminates your batch. The hubs are made of 303 stainless steel to resist rusting in wet conditions common to food plants. However, these couplings shouldn’t directly touch food, since they’re not FDA compliant. If the spider fails, the hubs will interlock, giving you time to shut down equipment before other components break. You don’t need to lubricate these couplings.
Also called Lovejoy® and jaw couplings, a complete coupling requires two hubs and one spider (all sold separately).
Hubs attach to the end of your shaft and have a set screw that bites into the shaft to hold the coupling in place.
Spiders cushion between the two hubs to reduce shocks and handle minor shaft misalignment.
Metal-Impregnated Buna-N—Metal-impregnated Buna-N spiders are the most commonly used and are good for applications that start, stop, and reverse often. They also dampen vibration and resist some chemicals.
Metal-Impregnated Hytrel—Metal-impregnated Hytrel spiders run at higher torque and resist chemicals better than Buna-N spiders. However, they shouldn’t be used in applications that start, stop, and reverse frequently.
Hubs | Metal-Impregnated Buna-N Spiders | Metal-Impregnated Hytrel Spiders | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Misalignment Capability | Misalignment Capability | ||||||||||||||||||||
Overall Lg. | OD | For Rotary Motion | Choose a Shaft Diameter | Each | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Spider Material | Each | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Spider Material | Each | |||||
303 Stainless Steel Hubs | |||||||||||||||||||||
| 2 1/8" | 1 3/4" | Continuous, Forward/Reverse, Start/Stop | 1/2", 5/8", 3/4", 7/8" | 3507N9 | 0000000 | 3,600 | 80 | 0.015" | 1° | Metal-Impregnated Buna-N | 3507N39 | 000000 | 3,600 | 240 | 0.015" | 1° | Metal-Impregnated Hytrel | 3507N44 | 000000 | ||
| 2 1/2" | 2 1/8" | Continuous, Forward/Reverse, Start/Stop | 1/2", 5/8", 3/4", 7/8", 1", 1 1/8" | 3507N615 | 000000 | 3,600 | 185 | 0.015" | 1° | Metal-Impregnated Buna-N | 3507N4 | 00000 | 3,600 | 565 | 0.015" | 1° | Metal-Impregnated Hytrel | 3507N45 | 000000 | ||
| 3 1/2" | 2 17/32" | Continuous, Forward/Reverse, Start/Stop | 3/4", 1", 1 1/4", 1 3/8" | 3507N815 | 000000 | 3,600 | 415 | 0.015" | 1° | Metal-Impregnated Buna-N | 3507N41 | 00000 | 3,600 | 1,245 | 0.015" | 1° | Metal-Impregnated Hytrel | 3507N46 | 000000 | ||
| 54 mm | 45 mm | Continuous, Forward/Reverse, Start/Stop | 14 mm, 19 mm, 20 mm, 22 mm | 6953N111 | 000000 | 3,600 | 80 | 0.015" | 1° | Metal-Impregnated Buna-N | 3507N39 | 00000 | 3,600 | 240 | 0.015" | 1° | Metal-Impregnated Hytrel | 3507N44 | 00000 | ||
| 64 mm | 54 mm | Continuous, Forward/Reverse, Start/Stop | 20 mm, 22 mm, 24 mm | 6953N181 | 000000 | 3,600 | 185 | 0.015" | 1° | Metal-Impregnated Buna-N | 3507N4 | 00000 | 3,600 | 565 | 0.015" | 1° | Metal-Impregnated Hytrel | 3507N45 | 000000 | ||
| 89 mm | 65 mm | Continuous, Forward/Reverse, Start/Stop | 20 mm, 24 mm, 25 mm | 6953N281 | 000000 | 3,600 | 415 | 0.015" | 1° | Metal-Impregnated Buna-N | 3507N41 | 00000 | 3,600 | 1,245 | 0.015" | 1° | Metal-Impregnated Hytrel | 3507N46 | 000000 | ||
