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Performance
Lightweight Flexible Shaft Couplings
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(Each Component Sold Separately) |
Made with lightweight nylon sleeves, these gear couplings require less energy to move than other high-torque flexible couplings. They compensate for parallel, angular, and axial misalignment. Fasten to your shafts by tightening the set screws, which bite into the shaft to hold it.
A complete coupling consists of two hubs and one sleeve (each component sold separately).
Hubs | Nylon Sleeves | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Misalignment Capability | ||||||||||||||||
Overall Lg. | OD | For Shaft Type | For Rotary Motion | Choose a Shaft Diameter | Each | Max. Rotation Speed, rpm | Max. Torque | Parallel | Angular | Axial | Max. Temp., ° F | Each | ||||
Steel Hubs | ||||||||||||||||
| 1 25/32" | 1 37/64" | Keyed | Continuous | 1/4", 3/8", 7/16", 1/2", 5/8" | 6247K21 | 000000 | 14,000 | 255 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K31 | 000000 | ||
| 1 31/32" | 1 29/32" | Keyed | Continuous | 7/16", 1/2", 5/8", 3/4" | 6247K22 | 00000 | 11,800 | 425 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K32 | 00000 | ||
| 2 5/64" | 2 1/16" | Keyed | Continuous | 1/2", 5/8", 3/4", 7/8" | 6247K23 | 00000 | 10,600 | 530 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K33 | 00000 | ||
| 3 5/32" | 3" | Keyed | Continuous | 1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4" | 6247K25 | 00000 | 7,500 | 1,590 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K35 | 00000 | ||
| 3 5/32" | 3 1/4" | Keyed | Continuous | 1/2", 5/8", 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2" | 6247K26 | 00000 | 6,700 | 2,120 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K36 | 00000 | ||
| 3 11/64" | 2 19/32" | Keyed | Continuous | 5/8", 3/4", 1", 1 1/8" | 6247K24 | 00000 | 8,500 | 1,195 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K34 | 00000 | ||
| 3 3/8" | 3 41/64" | Keyed | Continuous | 5/8", 3/4", 1", 1 1/8", 1 1/4", 1 3/8", 1 5/8" | 6247K27 | 000000 | 6,000 | 2,655 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K37 | 00000 | ||
| 3 59/64" | 3 57/64" | Keyed | Continuous | 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2" | 6247K28 | 000000 | 5,600 | 3,715 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K38 | 00000 | ||
| 45 mm | 33 mm | Keyed | Continuous | 8 mm, 10 mm, 11 mm, 12 mm, 14 mm | 6247K51 | 00000 | 14,000 | 265 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K81 | 00000 | ||
| 49.8 mm | 38.9 mm | Keyed | Continuous | 10 mm, 14 mm | 6247K52 | 00000 | 11,800 | 425 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K82 | 00000 | ||
| 52.6 mm | 44.7 mm | Keyed | Continuous | 10 mm, 12 mm, 15 mm, 16 mm, 18 mm, 19 mm, 20 mm, 22 mm, 24 mm | 6247K53 | 00000 | 10,600 | 530 ft·lbf | 0.016" | 1° | 0.04" | 180 | 6247K83 | 00000 | ||
| 80 mm | 68.6 mm | Keyed | Continuous | 22 mm | 6247K569 | 00000 | 6,700 | 2,120 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K85 | 00000 | ||
| 80.5 mm | 53.8 mm | Keyed | Continuous | 14 mm, 16 mm, 20 mm, 25 mm, 28 mm | 6247K54 | 00000 | 8,500 | 1,195 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K84 | 00000 | ||
| 99.3 mm | 77.7 mm | Keyed | Continuous | 25 mm | 6247K589 | 000000 | 5,600 | 3,715 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K86 | 00000 | ||
| 140 mm | 110 mm | Keyed | Continuous | 25 mm | 6247K604 | 000000 | 4,000 | 10,080 in·lbf | 0.016" | 1° | 0.04" | 180 | 6247K87 | 000000 | ||
Ultra-High-Torque Flexible Shaft Couplings
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Components of a Coupling Shown Assembled | (Each Component Sold Separately) |
With a rigid gear design, these steel couplings transmit more torque than other couplings of the same size. Lubrication is required. To install, heat the hubs to expand them slightly and fit them onto the shaft. When they cool, hubs shrink to fit the shaft tightly.
A complete coupling consists of two hubs, one sleeve, and one seal kit (each component sold separately).
Hubs | Steel Sleeves | Seal Kits | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | Axial | Each | Includes | Each | |||||
Steel Hubs | ||||||||||||||||||
| 3 1/8" | 3 5/16" | Keyed | Continuous | 3/4", 7/8", 1", 1 1/8", 1 1/4" | 6454K11 | 0000000 | 6,000 | 2,500 | 0.005" | 1° | 0.03" | 6454K21 | 0000000 | Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings | 6454K31 | 000000 | ||
| 3 3/4" | 3 3/4" | Keyed | Continuous | 1 1/4", 1 3/8", 1 1/2", 1 5/8" | 6454K13 | 000000 | 5,000 | 7,600 | 0.007" | 1° | 0.03" | 6454K23 | 000000 | Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings | 6454K33 | 00000 | ||
| 4 1/4" | 4 3/4" | Keyed | Continuous | 1 1/4", 1 3/8", 1 1/2", 1 5/8", 1 3/4", 1 7/8", 2", 2 1/8" | 6454K15 | 000000 | 4,200 | 20,200 | 0.007" | 1° | 0.03" | 6454K25 | 000000 | Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings | 6454K35 | 00000 | ||
| 4 3/4" | 5 1/2" | Keyed | Continuous | 1 7/8", 2", 2 1/8", 2 1/4", 2 3/8" | 6454K17 | 000000 | 3,750 | 30,200 | 0.007" | 1° | 0.05" | 6454K27 | 000000 | Two Buna-N Rubber Lubrication Seals, Two Steel Snap Rings | 6454K37 | 000000 | ||
High-Speed Vibration-Damping Flexible Shaft Couplings
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(Each Component Sold Separately) |
Use these gear-shaped couplings for high-speed and high-torque applications. A rubber center allows flexing so couplings can take on multiple types of misalignment while damping vibration and shock. With no metal-to-metal contact, there’s no need for lubrication. Fasten to your shafts by tightening the set screws, which bite into the shaft to hold it.
A complete coupling consists of two hubs and one center (each component sold separately).
Hubs have a keyway, except hubs for 1⁄4" and 3⁄8" shaft dia. do not have a keyway.
Hubs | Shaft Coupling Centers | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Misalignment Capability | ||||||||||||||||
Overall Lg. | OD | For Rotary Motion | Choose a Shaft Diameter | Each | Max. Rotation Speed, rpm | Max. Torque, in·lbf | Parallel | Angular | Axial | Temp. Range, ° F | Material | Each | ||||
Cast Iron Hubs | ||||||||||||||||
| 2 13/16" | 3 1/4" | Continuous | 1 1/4", 16 mm, 20 mm, 24 mm, 28 mm | 6507K63 | 000000 | 7,600 | 240 | 0.015" | 1° | 0.125" | -30 to 275 | TPE | 6507K72 | 000000 | ||
| 3 1/2" | 4" | Continuous | 20 mm, 24 mm, 25 mm, 28 mm, 30 mm, 35 mm | 6507K65 | 00000 | 6,000 | 450 | 0.015" | 1° | 0.125" | -30 to 275 | TPE | 6507K73 | 00000 | ||
| 3 15/16" | 4 5/8" | Continuous | 3/4", 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2", 1 5/8", 1 3/4", 1 7/8", 24 mm, 25 mm, 28 mm, 30 mm, 32 mm, 35 mm, 38 mm, 42 mm | 6507K5 | 00000 | 5,250 | 725 | 0.02" | 1° | 0.125" | -30 to 275 | TPE | 6507K74 | 00000 | ||
| 4 7/16" | 5 29/64" | Continuous | 7/8", 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2", 1 5/8", 1 7/8", 2", 2 1/8", 2 1/4", 2 3/8", 24 mm, 28 mm, 32 mm, 38 mm, 42 mm, 45 mm, 48 mm | 6507K12 | 00000 | 4,500 | 1,135 | 0.02" | 1° | 0.125" | -30 to 275 | TPE | 6507K75 | 00000 | ||
| 5 1/16" | 6 23/64" | Continuous | 1", 1 1/8", 1 1/4", 1 3/8", 1 1/2", 1 5/8", 1 3/4", 1 7/8", 2 1/8", 2 3/8", 2 1/2", 2 7/8", 48 mm | 6507K7 | 000000 | 3,750 | 1,800 | 0.025" | 1° | 0.125" | -30 to 275 | TPE | 6507K76 | 00000 | ||
| 5 11/16" | 7 1/2" | Continuous | 1 1/8", 1 1/4", 1 1/2", 1 5/8", 1 3/4", 1 7/8", 2", 2 1/8", 2 1/4", 2 3/8", 2 7/8", 35 mm | 6507K8 | 000000 | 3,600 | 2,875 | 0.025" | 1° | 0.125" | -30 to 275 | TPE | 6507K77 | 000000 | ||
| 7 1/8" | 8 5/8" | Continuous | 1 5/8", 1 7/8", 2", 2 1/8", 2 3/8", 2 7/8", 60 mm | 6507K9 | 000000 | 3,600 | 4,530 | 0.032" | 1° | 0.125" | -30 to 275 | EPDM | 6507K78 | 000000 | ||
Sintered Steel Hubs | ||||||||||||||||
| 2" | 2 1/16" | Continuous | 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 12 mm, 14 mm, 15 mm, 16 mm | 6507K1 | 00000 | 9,200 | 60 | 0.01" | 1° | 0.125" | -30 to 275 | TPE | 6507K69 | 0000 | ||
| 2 3/8" | 2 15/32" | Continuous | 1/2", 5/8", 3/4", 7/8", 1", 15 mm, 20 mm, 24 mm, 25 mm | 6507K2 | 00000 | 7,600 | 120 | 0.01" | 1° | 0.125" | -30 to 275 | TPE | 6507K71 | 00000 | ||
| 2 7/8" | 3 1/4" | Continuous | 1/2", 5/8", 3/4", 7/8", 1", 1 1/8" | 6507K62 | 00000 | 7,600 | 240 | 0.015" | 1° | 0.125" | -30 to 275 | TPE | 6507K72 | 00000 | ||
| 3 5/16" | 4" | Continuous | 5/8", 3/4", 7/8", 15/16", 1", 1 1/8", 1 1/4", 1 3/8" | 6507K64 | 00000 | 6,000 | 450 | 0.015" | 1° | 0.125" | -30 to 275 | TPE | 6507K73 | 00000 | ||
Splined Flexible Shaft Couplings
 |  |  |
Components of a Coupling Shown Assembled | (Each Component Sold Separately) | Diameter |
For use with splined shafts, which are commonly found in gearboxes and pumps, these couplings are capable of transmitting more torque than couplings for round and keyed shafts. They 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 (each component sold separately). Hubs fasten onto your shafts without damaging them. Tighten the clamping screws to secure.
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 provide fair vibration damping and good chemical resistance.
Hubs | Buna-N Spiders | Hytrel Spiders | Polyurethane Spiders | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Misalignment Capability | Misalignment Capability | Misalignment Capability | ||||||||||||||||||||||||||||||||
Overall Lg. | OD | For Shaft Type | Pitch | Pressure Angle | For Rotary Motion | Choose an SAE Spline Size (Diameter X × Diameter Y) | 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 | ||||||
Iron Hubs | ||||||||||||||||||||||||||||||||||
| 2 3/16" | 2 7/64" | Splined | 0.5" | 30° | Continuous, Forward/Reverse, Start/Stop | A (5/8" × 0.509"), B (7/8" × 0.754") | 9843T1 | 000000 | 9,000 | 140 | 0.015" | 1° | -40 to 212 | Buna-N | 6408K75 | 000000 | 3,600 | 400 | 0.015" | 0.5° | -55 to 245 | Hytrel | 6408K95 | 000000 | 3,600 | 210 | 0.015" | 1° | -30 to 160 | Polyurethane Rubber | 2410K13 | 000000 | ||
| 2 9/16" | 2 7/64" | Splined | 0.5" | 30° | Continuous, Forward/Reverse, Start/Stop | A (5/8" × 0.509"), B (7/8" × 0.754") | 9843T2 | 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 | ||
| 2 7/8" | 2 17/32" | Splined | 0.5" | 30° | Continuous, Forward/Reverse, Start/Stop | A (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877") | 9843T3 | 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 | ||
| 3 1/2" | 2 17/32" | Splined | 0.5" | 30° | Continuous, Forward/Reverse, Start/Stop | A (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877") | 9843T4 | 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 | ||
| 4 1/4" | 3 21/64" | Splined | 0.5" | 30° | Continuous, Forward/Reverse, Start/Stop | A (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877"), C (1 1/4" × 1.087") | 9843T5 | 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 | ||
| 4 1/2" | 3 3/4" | Splined | 0.5" | 30° | Continuous, Forward/Reverse, Start/Stop | A (5/8" × 0.509"), B (7/8" × 0.754"), BB (1" × 0.877"), C (1 1/4" × 1.087"), D (1 3/4" × 1.506"), E (1 3/4" × 1.506") | 9843T6 | 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 | ||
