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Jaw couplings are flexible couplings that connect two shafts at their ends to transmit power. They consist of jaw coupling hubs and spiders for handling diverse temperature ranges, speed of equipment... Read More
Lovejoy jaw type couplings are designed for light, medium and heavy duty electrical motor and internal combustion power transmission. These couplings feature sintered iron construction for excellent tensile strength and a centre drop out design for proper shaft separation. They absorb shock and misalignment for reduced wear on the shaft assembly. Choose from a wide range of Lovejoy RRS & RRSC type spacer coupling assemblies, available in lengths ranging from 1.2 to 2.8 inches on Raptor Supplies.
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B| Style | Model | Coupling Size | Bore Size | Keyway Size | Hub Style | Length through Bore | Outside Dia. | Material | Hub Length | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 68514451672 | SGD 41.17 | |||||||||
| A | 68514441228 | SGD 31.88 | RFQ | ||||||||
| A | 68514456512 | SGD 31.88 | RFQ | ||||||||
| A | 68514438143 | SGD 31.88 | RFQ | ||||||||
| A | 68514438144 | SGD 31.88 | RFQ | ||||||||
| B | 68514444474 | - | RFQ | ||||||||
| A | 68514438147 | SGD 48.85 | RFQ | ||||||||
| A | 68514438145 | SGD 48.85 | RFQ | ||||||||
| A | 68514438146 | SGD 48.85 | RFQ | ||||||||
| A | 68514438148 | SGD 48.85 | RFQ | ||||||||
| A | 68514438149 | SGD 48.85 | RFQ | ||||||||
| A | 68514438150 | SGD 48.85 | RFQ | ||||||||
| A | 68514438171 | SGD 62.31 | RFQ | ||||||||
| A | 68514438172 | SGD 62.31 | RFQ | ||||||||
| A | 68514438169 | SGD 62.31 | RFQ | ||||||||
| A | 68514438170 | SGD 62.31 | RFQ | ||||||||
| A | 68514438168 | SGD 62.31 | RFQ | ||||||||
| B | 68514438151 | - | RFQ | ||||||||
| A | 68514438152 | SGD 89.49 | RFQ | ||||||||
| A | 68514438154 | SGD 89.49 | RFQ | ||||||||
| A | 68514438156 | SGD 89.49 | RFQ | ||||||||
| A | 68514438158 | SGD 89.49 | RFQ | ||||||||
| A | 68514438157 | SGD 89.49 | RFQ | ||||||||
| A | 68514438153 | SGD 89.49 | RFQ | ||||||||
| A | 68514438155 | SGD 89.49 | RFQ |
Lovejoy jaw type couplings are used for power transmission to industrial equipment such as pumps, gearboxes, compressors, blowers, mixers & conveyors. These couplings have a centre drop out design for proper shaft separation. The nitrile butadiene (Buna N) rubber elastomer material is oil resistant and operates effectively in temperatures ranging between -40 & 212 deg F. They absorb shock and misalignment for reduced wear on the shaft assembly. Choose from a wide range of Lovejoy RRS & RRSC type spacer coupling assemblies, available in bore diameters ranging between 3/4 and 7/16 inches, on Raptor Supplies.
AB| Style | Model | Coupling Size | Bore Size | Keyway Size | Hub Style | Length through Bore | Outside Dia. | Material | Hub Length | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 68514450357 | - | RFQ | ||||||||
| B | 68514441229 | SGD 48.85 | RFQ | ||||||||
| A | 68514441230 | - | RFQ | ||||||||
| A | 68514452184 | - | RFQ | ||||||||
| A | 68514441231 | - | RFQ | ||||||||
| A | 68514452199 | - | RFQ | ||||||||
| A | 68514438159 | - | RFQ | ||||||||
| A | 68514445265 | - | RFQ | ||||||||
| B | 68514445273 | SGD 288.40 | RFQ | ||||||||
| A | 68514445290 | - | RFQ | ||||||||
| A | 68514445269 | - | RFQ | ||||||||
| A | 68514445281 | - | RFQ | ||||||||
| A | 68514445301 | - | RFQ |
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C| Style | Model | Coupling Size | Keyway Size | Hub Style | Bore Type | Outside Dia. | Overall Coupling Length | Material | Coupling Type | Price (inc. GST) | |
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| A | 68514461989 | SGD 180.58 | RFQ | ||||||||
| B | 68514461983 | - | RFQ | ||||||||
| C | 68514471442 | SGD 30.34 | |||||||||
| C | 68514471444 | SGD 46.85 | |||||||||
| C | 68514471446 | SGD 76.04 | RFQ | ||||||||
| B | 68514471448 | SGD 119.35 | RFQ | ||||||||
| C | 68514471450 | SGD 228.15 | RFQ | ||||||||
| C | 68514471451 | SGD 274.95 | |||||||||
| B | 68514471452 | - | RFQ |
A| Style | Model | Coupling Size | Bore Size | Length through Bore | Outside Dia. | Max. Bore | Hub Length | Material | Coupling Type | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 68514410219 | SGD 15.21 | RFQ | ||||||||
| A | 68514410427 | SGD 14.22 | RFQ | ||||||||
| A | 68514410695 | SGD 16.49 | RFQ | ||||||||
| A | 68514410779 | SGD 25.01 | RFQ | ||||||||
| A | 68514411095 | SGD 37.95 | RFQ | ||||||||
| A | 68514462578 | SGD 50.60 | RFQ | ||||||||
| A | 68514411525 | SGD 71.78 | RFQ | ||||||||
| A | 68514462449 | SGD 102.38 | RFQ | ||||||||
| A | 68514412123 | SGD 124.98 | RFQ | ||||||||
| A | 68514454033 | SGD 179.44 | |||||||||
| A | 68514456003 | SGD 224.53 | RFQ |
A| Style | Model | Coupling Size | Length through Bore | Max. Bore | Hub Length | Outside Dia. | Material | Nominal Torque | Coupling Type | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 68514410129 | SGD 8.96 | |||||||||
| A | 68514410218 | SGD 8.96 | RFQ | ||||||||
| A | 68514411094 | SGD 55.70 | RFQ | ||||||||
| A | 68514476172 | SGD 996.37 | RFQ |
A| Style | Model | Coupling Size | Bore Size | Keyway Size | Length through Bore | Outside Dia. | Hub Length | Material | Coupling Type | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 68514410357 | SGD 267.05 | |||||||||
| A | 68514410338 | SGD 43.38 | RFQ | ||||||||
| A | 68514410359 | SGD 267.05 | RFQ | ||||||||
| A | 68514410335 | SGD 12.40 | RFQ | ||||||||
| A | 68514410337 | SGD 12.40 | RFQ | ||||||||
| A | 68514410360 | SGD 267.05 | RFQ | ||||||||
| A | 68514410362 | SGD 267.05 | RFQ | ||||||||
| A | 68514441610 | SGD 12.40 | RFQ |
A| Style | Model | Coupling Size | Length through Bore | Outside Dia. | Material | Min. Bore | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|
| A | 68514438568 | SGD 153.77 | RFQ | |||||
| A | 68514438570 | SGD 153.77 | RFQ | |||||
| A | 68514438569 | SGD 153.03 | ||||||
| A | 68514437901 | SGD 164.34 | RFQ | |||||
| A | 68514437902 | SGD 164.34 | RFQ | |||||
| A | 68514437900 | SGD 164.34 | RFQ | |||||
| A | 68514476203 | SGD 433.75 | RFQ | |||||
| A | 68514438573 | SGD 199.85 | RFQ | |||||
| A | 68514438574 | SGD 195.52 | RFQ | |||||
| A | 68514438572 | SGD 195.52 | RFQ | |||||
| A | 68514438571 | SGD 195.52 | ||||||
| A | 68514437905 | SGD 233.20 | ||||||
| A | 68514437906 | SGD 233.20 | RFQ | |||||
| A | 68514437907 | SGD 233.20 | RFQ | |||||
| A | 68514455195 | SGD 84.17 | ||||||
| A | 68514437904 | SGD 233.20 | RFQ | |||||
| A | 68514445213 | SGD 233.20 | RFQ | |||||
| A | 68514476501 | SGD 303.99 | RFQ | |||||
| A | 68514437915 | SGD 253.63 | RFQ | |||||
| A | 68514437909 | SGD 253.63 | ||||||
| A | 68514437916 | SGD 253.63 | ||||||
| A | 68514476228 | SGD 307.50 | RFQ | |||||
| A | 68514437911 | SGD 253.63 | RFQ | |||||
| A | 68514437910 | SGD 277.87 | ||||||
| A | 68514437913 | SGD 253.63 | RFQ |
Lovejoy C-type couplings are ideal for transmitting power to industrial equipment such as pumps, gearboxes, compressors, blowers, mixers and conveyors. These jaw-type couplings feature cast-iron construction to handle higher torque rates and accommodate both angular and parallel shaft misalignments. They provide a standard shaft-to-shaft connection for medium-duty applications and ensure a fail-safe performance that continues to perform even if the elastomer fails. Choose from a wide range of these Lovejoy C-type couplings, available in 7/8, 1-1/2, 1-1/4 & 1-3/4 inch bore diameters on Raptor Supplies.
A| Style | Model | Coupling Size | Bore Size | Thread | Length through Bore | Outside Dia. | Hub Style | Material | Nominal Torque | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 68514440125 | SGD 325.24 | RFQ | ||||||||
| A | 68514440126 | SGD 419.76 | RFQ | ||||||||
| A | 68514426067 | SGD 419.97 | RFQ | ||||||||
| A | 68514441036 | SGD 562.78 | |||||||||
| A | 68514441037 | SGD 766.26 | RFQ | ||||||||
| A | 68514441038 | SGD 929.30 | RFQ |
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Y| Style | Model | Price (inc. GST) | |
|---|---|---|---|
| A | SHR-18C-4-8 | SGD 125.23 | RFQ |
| B | SHR-55C-14-24 | SGD 247.65 | RFQ |
| C | SHR-43C-19-19 | SGD 191.36 | RFQ |
| D | SHR-43C-19-20 | SGD 191.36 | RFQ |
| E | SHR-43C-19-22 | SGD 191.36 | RFQ |
| F | SHR-43C-22-22 | SGD 191.36 | RFQ |
| G | SHR-55C-14-14 | SGD 247.65 | RFQ |
| H | SHR-55C-14-16 | SGD 247.65 | RFQ |
| I | SHR-55C-14-18 | SGD 247.65 | RFQ |
| J | SHR-55C-14-19 | SGD 247.65 | RFQ |
| K | SHR-55C-14-20 | SGD 247.65 | RFQ |
| L | SHR-55C-14-22 | SGD 247.65 | RFQ |
| M | SHR-55C-14-25 | SGD 247.65 | RFQ |
| N | SHR-43C-14-20 | SGD 191.36 | RFQ |
| O | SHR-55C-19-19 | SGD 247.65 | RFQ |
| P | SHR-55C-19-20 | SGD 247.65 | RFQ |
| Q | SHR-55C-19-22 | SGD 247.65 | RFQ |
| R | SHR-55C-19-24 | SGD 247.65 | RFQ |
| S | SHR-55C-19-25 | SGD 247.65 | RFQ |
| T | SHR-55C-22-22 | SGD 247.65 | RFQ |
| U | SHR-55C-22-24 | SGD 247.65 | RFQ |
| V | SHR-55C-22-25 | SGD 247.65 | RFQ |
| W | SHR-55C-24-24 | SGD 247.65 | RFQ |
| X | SHR-55C-24-25 | SGD 247.65 | RFQ |
| Y | SHR-43C-14-22 | SGD 191.36 | RFQ |
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C| Style | Model | Price (inc. GST) | |
|---|---|---|---|
| A | AL09511/16 | SGD 26.07 | RFQ |
| A | L07058B | SGD 12.38 | |
| A | RRS07058 | SGD 9.19 | |
| A | AL09524MM | SGD 26.07 | RFQ |
| A | AL10024MM | SGD 51.82 | RFQ |
| A | AL07012MM | SGD 10.09 | RFQ |
| A | AL10020MM | SGD 51.82 | RFQ |
| A | 53968 | SGD 254.46 | |
| B | L07010MM | SGD 13.19 | |
| A | AL07012 | SGD 10.09 | RFQ |
| A | L2257/16 | SGD 221.15 | |
| A | AL09912 | SGD 32.97 | RFQ |
| A | LC10034 | SGD 53.52 | |
| A | 53983 | SGD 20.80 | |
| A | AL09018 | SGD 16.90 | RFQ |
| A | 53967 | SGD 254.46 | |
| A | AL15034 | SGD 86.68 | RFQ |
| C | L110178 | SGD 160.26 | RFQ |
| A | L190214 | SGD 319.03 | RFQ |
| A | SS07512NK | SGD 156.54 | |
| A | RRS07034 | SGD 9.19 | |
| A | L0505/16NKB | SGD 8.51 | |
| A | L07517MMB | SGD 15.17 | |
| A | 53975 | SGD 282.44 | |
| A | 53964 | SGD 229.51 |
A| Style | Model | Price (inc. GST) | |
|---|---|---|---|
| A | G2FREBRB | SGD 751.98 | RFQ |
| A | G45FRSBRB | SGD 2830.55 | |
| A | G35FREBRB | SGD 1824.14 | |
| A | G5CRRB | SGD 1852.35 | |
| A | G15FRSBRB | SGD 669.11 | RFQ |
| A | G25FREBRB | SGD 924.01 | |
| A | G3FRSBRB | SGD 1185.27 | |
| A | G15FREBRB | SGD 669.11 | RFQ |
| A | G5FREBRB | SGD 3836.97 | |
| A | G4CRRB | SGD 1166.14 | RFQ |
| A | G45CRRB | SGD 1425.12 | |
| A | G35CRRB | SGD 882.59 | RFQ |
| A | G5FRSBRB | SGD 3836.97 | |
| A | G35FRSBRB | SGD 1824.14 | |
| A | G45FREBRB | SGD 2830.55 | |
| A | G1FREBRB | SGD 439.70 | RFQ |
| A | G4FREBRB | SGD 2295.91 | |
| A | G25CRRB | SGD 384.75 | RFQ |
| A | G2CRRB | SGD 260.96 | RFQ |
| A | G55FREBRB | SGD 7422.38 | |
| A | G25FRSBRB | SGD 924.01 | RFQ |
| A | G1FRSBRB | SGD 439.70 | RFQ |
| A | G15CRRB | SGD 197.38 | RFQ |
| A | G3FREBRB | SGD 1185.27 | |
| A | G2FRSBRB | SGD 751.98 | RFQ |
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T| Style | Model | Price (inc. GST) | |
|---|---|---|---|
| A | DC-DLSS10-02 | SGD 112.57 | |
| B | DC-DLSS20-12M | SGD 125.23 | |
| C | DC-DLSS40-14M | SGD 154.78 | |
| D | DC-DLSS40-10 | SGD 154.78 | |
| E | DC-DLSS40-08 | SGD 154.78 | |
| F | DC-DLSS30-14M | SGD 139.30 | |
| G | DC-DLSS30-12M | SGD 139.30 | |
| H | DC-DLSS30-10 | SGD 139.30 | |
| I | DC-DLSS30-08 | SGD 139.30 | |
| J | DC-DLSS20-08M | SGD 125.23 | |
| K | DC-DLSS10-03 | SGD 112.57 | |
| L | DC-DLSS20-08 | SGD 125.23 | |
| M | DC-DLSS20-06 | SGD 125.23 | |
| N | DC-DLSS20-05 | SGD 125.23 | |
| O | DC-DLSS20-04 | SGD 125.23 | |
| P | DC-DLSS10-08M | SGD 112.57 | |
| Q | DC-DLSS10-06M | SGD 112.57 | |
| R | DC-DLSS10-05 | SGD 112.57 | |
| S | DC-DLSS10-04 | SGD 112.57 | |
| T | DC-DLSS40-16M | SGD 154.78 |
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|---|---|---|---|
| A | DC-SBS19-0404 | SGD 139.30 | |
| B | DC-SBS25-0808 | SGD 171.67 | |
| C | DC-SBS32-1010 | SGD 188.55 | |
| D | DC-SBS38-1212 | SGD 216.69 | |
| E | DC-SBS44-1414 | SGD 371.47 | |
| F | DC-SBS51-1616 | SGD 433.38 | |
| G | DC-SBS63-2020 | SGD 498.11 |
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Y| Style | Model | Price (inc. GST) | |
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| A | SRB-16C-4-4 | SGD 70.35 | RFQ |
| B | SRBA-39C-14-19 | SGD 191.36 | RFQ |
| C | SRBA-49C-12-14 | SGD 318.00 | RFQ |
| D | SRBA-49C-12-12 | SGD 318.00 | RFQ |
| E | SRBA-39C-19-19 | SGD 191.36 | RFQ |
| F | SRBA-39C-18-19 | SGD 191.36 | RFQ |
| G | SRBA-39C-18-18 | SGD 191.36 | RFQ |
| H | SRBA-49C-14-19 | SGD 318.00 | RFQ |
| I | SRBA-49C-14-18 | SGD 318.00 | RFQ |
| J | SRBA-49C-14-16 | SGD 318.00 | RFQ |
| K | SRBA-49C-14-14 | SGD 318.00 | RFQ |
| L | SRBA-49C-12-20 | SGD 318.00 | RFQ |
| M | SRBA-39C-16-19 | SGD 191.36 | RFQ |
| N | SRBA-39C-16-18 | SGD 191.36 | RFQ |
| O | SRBA-39C-16-16 | SGD 191.36 | RFQ |
| P | SRBA-39C-14-18 | SGD 191.36 | RFQ |
| Q | SRBA-49C-16-18 | SGD 318.00 | RFQ |
| R | SRBA-39C-14-16 | SGD 191.36 | RFQ |
| S | SRBA-39C-14-14 | SGD 191.36 | RFQ |
| T | SRBA-39C-12-19 | SGD 191.36 | RFQ |
| U | SRBA-39C-12-18 | SGD 191.36 | RFQ |
| V | SRBA-39C-12-16 | SGD 191.36 | RFQ |
| W | SRBA-39C-12-14 | SGD 191.36 | RFQ |
| X | SRBA-39C-12-12 | SGD 191.36 | RFQ |
| Y | SRBA-39C-10-19 | SGD 191.36 | RFQ |
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Y| Style | Model | Price (inc. GST) | |
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| A | DC-DAC19-04 | SGD 49.25 | |
| B | DC-DAC25-06 | SGD 67.54 | |
| C | DC-DAC57-12 | SGD 239.21 | |
| D | DC-DAC50-19M | SGD 219.51 | |
| E | DC-DAC50-16M | SGD 219.51 | |
| F | DC-DAC50-16 | SGD 219.51 | |
| G | DC-DAC50-14M | SGD 219.51 | |
| H | DC-DAC50-12 | SGD 219.51 | |
| I | DC-DAC50-08 | SGD 219.51 | |
| J | DC-DAC41-16M | SGD 106.94 | |
| K | DC-DAC41-10 | SGD 106.94 | |
| L | DC-DAC33-16M | SGD 94.28 | |
| M | DC-DAC33-12M | SGD 97.09 | |
| N | DC-DAC33-10 | SGD 97.09 | |
| O | DC-DAC33-06 | SGD 97.09 | |
| P | DC-DAC25-10M | SGD 67.54 | |
| Q | DC-DAC19-08M | SGD 49.25 | |
| R | DC-DAC19-05M | SGD 49.25 | |
| S | DC-DAC57-19M | SGD 239.21 | |
| T | DC-DAC57-16 | SGD 239.21 | |
| U | DC-DAC57-10 | SGD 239.21 | |
| V | DC-DAC50-10 | SGD 219.51 | |
| W | DC-DAC41-19M | SGD 106.94 | |
| X | DC-DAC41-14M | SGD 106.94 | |
| Y | DC-DAC41-12 | SGD 106.94 |
A| Style | Model | Keyway Width | Angular Displacement | Bore Size | Length through Bore | Max. Axial Displacement | Max. Bore | Max. Radial Displacement | Max. Speed | Price (inc. GST) | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | 68514476386 | SGD 3268.95 | RFQ | ||||||||
| A | 68514476183 | SGD 1529.23 | RFQ | ||||||||
| A | 68514476182 | SGD 1529.23 | RFQ |
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Y| Style | Model | Price (inc. GST) | |
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| A | SOH-16C-4.76 | SGD 29.55 | RFQ |
| B | SOH-57C-22 | SGD 116.79 | RFQ |
| C | SOH-43C-14 | SGD 70.35 | RFQ |
| D | SOH-43C-15.875 | SGD 70.35 | RFQ |
| E | SOH-43C-16 | SGD 70.35 | RFQ |
| F | SOH-43C-19 | SGD 70.35 | RFQ |
| G | SOH-57C-15.875 | SGD 116.79 | RFQ |
| H | SOH-57C-16 | SGD 116.79 | RFQ |
| I | SOH-57C-19 | SGD 116.79 | RFQ |
| J | SOH-57C-19.05 | SGD 116.79 | RFQ |
| K | SOH-57C-22.225 | SGD 116.79 | RFQ |
| L | SOH-43C-12 | SGD 70.35 | RFQ |
| M | SOH-57C-24 | SGD 116.79 | RFQ |
| N | SOHM-70C-19.05 | SGD 146.34 | RFQ |
| O | SOHM-70C-20 | SGD 146.34 | RFQ |
| P | SOHM-70C-22.225 | SGD 146.34 | RFQ |
| Q | SOHM-70C-25 | SGD 146.34 | RFQ |
| R | SOHM-70C-25.4 | SGD 146.34 | RFQ |
| S | SOHM-70C-28.575 | SGD 146.34 | RFQ |
| T | SOHM-70C-30 | SGD 146.34 | RFQ |
| U | SOHM-70C-31.75 | SGD 146.34 | RFQ |
| V | SOH-43C-12.7 | SGD 70.35 | RFQ |
| W | SOH-32C-9.525 | SGD 43.62 | RFQ |
| X | SOH-16C-4 | SGD 29.55 | RFQ |
| Y | SOH-20C-9.525 | SGD 32.36 | RFQ |
Jaw couplings are a type of flexible couplings designed to link two rotating shafts that are not properly aligned for transferring the rotational power or torque from one shaft to another. The jaw couplings are suitable for diverse industrial applications due to their versatile & robust construction and good speed capability, chemical resistance & dampening capability. Jaw couplings are easy to install, as they consist of only two jaw coupling hubs and a spider. These jaw coupling hubs are attached to the shafts and the spider flexes between the hubs for accommodating the misalignment & shocks. Shaft misalignments are mostly radial, parallel or angular and cause complications to transferring rotational power from one shaft to the other in the form of loads, vibrations, stresses and other forces, which change as per the type of misalignment.
The jaw coupling hubs are popular due to their fail-safe design that ensures interlocking of the coupling & continued operation (up to a certain extent) even after the elastomeric spider fails, wears out or gets loosened. Unlike gear, grid or chain couplings, jaw coupling hubs are also maintenance-free as they do not require periodic application of grease or additional maintenance (provided that the spider remains intact). These jaw coupling hubs are made of cast iron, powder metal, sintered iron, sintered carbon steel, steel or zinc alloy to ensure high compression strength and durability. They are also offered in aluminium or stainless steel construction for lightweight and resistance to corrosion in food & pharmaceutical environments.
Lovejoy jaw coupling hubs are available in two broad types: straight jaw coupling hubs and curved jaw coupling hubs. Straight jaw hubs are made from a diverse range of materials and feature straight jaws for adjusting to various styles of spiders. They are used with open centre spiders, snap wrap spiders with retainer rings; closed centre spiders having Nitrile Butadiene (Buna N), urethane, Hytrel or bronze construction. Curved jaw coupling hubs (Lovejoy CJ Series) on the other hand, feature a curved jaw profile that concentrates the torque to the central region of the spider's limbs, thereby improving the efficiency of the elastomer material and reduces rotational backlash. They are mostly used with open centre elastomeric spiders to accommodate shafts having little separation.
Choose from a wide range of these jaw coupling hubs, available in both unbored and bored variants on Raptor Supplies. The bored variants are offered in bore sizes ranging from 1/8 to 4 inches.
Jaw coupling hubs are ideal for linking two shafts when used in conjunction with elastomeric inserts or spiders to form couplings. These jaw coupling hubs are used in a wide range of motion control (servo) applications, such as conveyors, escalators, motor vehicles, forestry, agricultural & mining equipment in robotics, automobile, aeronautics and space industries.
A jaw coupling is made of three parts: two metallic hubs (jaw coupling hub) and an elastomer insert / element or spider. The spider has many lobes to fit the jaws of hubs alternatively for a tight press fit. Once the machinery starts running & the driving shaft starts rotating, the hub jaws attached to the driving shaft push towards the driven hub jaws and thereby towards the stationary shaft.
The jaws being locked together leads to torque transfer and rotation of the stationary shaft. The jaw coupling torque is then transmitted through the elastomer / spider lobes compressed between the hub jaws. These elastomeric spider legs act as coupling absorbers and help in cushioning the force between the driving & driven jaws. They absorb the vibration and shock from torque transfer and consequently protect the surrounding components from getting damaged.
Rigid couplings offer a rigid connection between two shafts that are firmly connected. They transfer torque smoothly throughout the system. These rigid couplings can't handle misalignment and shocks. Flexible couplings like jaw coupling hubs provide flexible connections and hence, can withstand shocks & misalignment up to a certain extent. However, there is a chance of some losses during torque transfer while using flexible jaw coupling.
Selected models of jaw coupling hubs feature a cutout slot in the mating part (hub) of the couplings, known as keyways. These slots or keyways fit in the keys or a separate mechanical attachment on the shafts or other mated tools. The use of "Keys" leads to improved torque & prevents slipping. It also results in reduced losses due to vibrations & backlash (degree of free movement between two rotating, mating parts).
However, some applications do not require keys, as keyless jaw coupling hubs use only set screw holding power to transfer torque. Keyless hubs are ideal for applications that cause no damages or injuries even if the shafts slip. Keyed jaw coupling hubs concentrate the stresses around the key or key slot, causing maintenance issues and efficiency losses. Keyless hubs distribute the load & hence require less maintenance.