Jaw Coupling

Two metal hubs with interlocking jaws and a flexible spider between them. The spider takes up shock and small misalignment between motor and machine.

Fail-safe: if the spider wears out, the jaws keep driving.
Choose the spider for the load: NBR for general use, urethane for more torque, Hytrel for the most.
Straight-jaw (L, SW) and curved-jaw (GR) hubs and spiders do not interchange.
Hubs are bored to your shafts. Pick both bores when you open a part.

Not sure which type? Compare them

Type	Misalignment	Backlash	Shock damping	Torque	Best for
Jaw CouplingYou are here	Low, about 1°	Low	Good	3–1,100 Nm	Motors to pumps, fans and gearboxes; fail-safe
Pin Bush Coupling	Low, about 0.5°	Low	Good	50–50,000 Nm	Large motors in heavy industry; bushes change easily
Tyre Coupling	High, up to 4°	Some	Very good	24–6,300 Nm	Shock loads and shafts that are hard to align
Gear Coupling	Medium, about 1.5°	Some	None	500–100,000 Nm	Very high torque in a small size; needs grease
Resilient Coupling	Low to medium, about 0.3°	Low	Good	50–100,000 Nm	Heavy drives with shock loads: conveyors, crushers, mills
Disc Coupling	Low, about 1°	Zero	None	50–10,000 Nm	High speed and precision, no lubrication
Servo Coupling	Low to medium	Zero	None	0.5–500 Nm	Servo motors, encoders and ball screws
Chain Coupling	Low, about 1°	Some	None	50–20,000 Nm	Simple, compact drives; easy to disconnect
Torque Limiter	Depends on the drive it carries	Low	None	2–5,000 Nm slip setting	Protecting machines from jams and overloads
Torque Limiter Coupling	Low to medium, from its coupling	Low	Depends on the coupling	2–5,000 Nm slip setting	Joining two shafts and protecting them from overloads
Nylon Gear Coupling	Medium, about 1°	Low	Some	10–2,000 Nm	Pumps and general drives; no lubrication, quiet
Locking Assembly	None, it is a rigid shaft-hub joint	Zero	None	20–100,000 Nm	Fixing pulleys, sprockets and hubs to a shaft without a keyway
Taper Bush	None, it is a rigid shaft-hub joint	Zero	None	Set by the bush size	Fitting pulleys, sprockets and coupling hubs to a shaft, no boring needed

Find a coupling for your drive

Pick the motor frame from its name plate, or fill in what you know. Each value narrows the table; leave the rest blank.

Motor frame (IEC)Motor shaft ØmmDriven shaft ØmmMotor powerkWSpeedrpmLoad type

Showing couplings with bores 20 mm. The best size for your drive is highlighted.

Choose a model · pick one or more, or leave all off to see every model

Hub material

Spider

Rated torque

48 of 67 parts match · best fit first

L Series17 parts · Straight jaws with a cushioning NBR spider between the hubs. Sintered iron, aluminium or cast-iron hubs. Interchanges with most L-type couplings.

Size	Hub material	Spider	Bore rangedmm	Outer ØAmm	Hub ØBmm	Overall lengthTmm	Rated torqueNm	Max speedrpm	Priceex GST	Brand
L-070Best fit	Sintered iron	NBR	9–20	36	36	51	4.9	–	₹900	Lovejoy
L-070Best fit	Aluminium	NBR	9–20	36	36	51	4.9	–	₹1,080	Lovejoy
L-075	Sintered iron	NBR	9–22	44.5	44.5	55	9.8	–	₹1,140	Lovejoy
L-075	Aluminium	NBR	9–22	44.5	39	55	9.8	–	₹1,370	Lovejoy
L-095	Cast iron	NBR	10–28	54	49	63	21.1	–	₹1,540	Lovejoy
L-095	Aluminium	NBR	10–28	54	49	63	21.1	–	₹1,760	Lovejoy
L-099	Cast iron	NBR	10–30	65	51	72	35.1	–	₹2,030	Lovejoy
L-099	Aluminium	NBR	10–30	65	51	72	35.1	–	₹2,310	Lovejoy
L-100	Cast iron	NBR	10–38	65	65	88	46.4	–	₹2,030	Lovejoy
L-100	Aluminium	NBR	10–38	65	65	88	46.4	–	₹2,310	Lovejoy
L-110	Cast iron	NBR	15–42	85	76	108	89	–	₹3,130	Lovejoy
L-110	Aluminium	NBR	15–42	85	76	108	89	–	₹3,570	Lovejoy
L-150	Cast iron	NBR	15–48	96	80	115	141	–	₹3,860	Lovejoy
L-150	Aluminium	NBR	15–48	96	80	115	141	–	₹4,410	Lovejoy
L-190	Cast iron	NBR	15–60	115	102	133	190	–	₹5,330	Lovejoy
L-190	Aluminium	NBR	15–60	115	102	133	190	–	₹6,090	Lovejoy
L-225	Cast iron	NBR	15–65	127	111	153	265	–	₹6,400	Lovejoy

SW Series7 parts · Snap Wrap: a wrap-around NBR element held by a steel ring. The element is checked or replaced in minutes without moving the motor or the driven machine. Cast-iron hubs.

Size	Hub material	Spider	Bore rangedmm	Outer ØAmm	Hub ØBmm	Overall lengthTmm	Rated torqueNm	Max speedrpm	Priceex GST	Brand
SW-095Best fit	Cast iron	NBR	10–28	65	49	63	21.1	–	₹2,530	Lovejoy
SW-099	Cast iron	NBR	10–30	78	51	72	35.1	–	₹3,390	Lovejoy
SW-100	Cast iron	NBR	10–38	78	65	88	46.4	–	₹3,390	Lovejoy
SW-110	Cast iron	NBR	15–42	96	76	108	89	–	₹4,820	Lovejoy
SW-150	Cast iron	NBR	15–48	111	80	115	141	–	₹6,250	Lovejoy
SW-190	Cast iron	NBR	15–60	129	102	133	190	–	₹8,240	Lovejoy
SW-225	Cast iron	NBR	15–65	142	111	153	265	–	₹9,850	Lovejoy

GR Series24 parts · Trasco GR: curved jaws with a red 98 Shore A polyurethane spider carry high torque in a compact size. Each hub is an A hub (narrower body) or a B hub (full body, takes a bigger bore); an A/B coupling joins two different shaft sizes. Interchanges with KTR Rotex couplings of the same size.

Size	Hub material	Spider	Bore rangedmm	Outer ØAmm	Hub ØBmm	Overall lengthTmm	Rated torqueNm	Max speedrpm	Priceex GST	Brand
Trasco GR 19 B/BBest fit	Aluminium	Polyurethane98 Sh A	10–24	40	40	66	17	14,000	₹1,520	SIT
Trasco GR 19 B/BBest fit	Steel	Polyurethane98 Sh A	10–24	40	40	66	17	19,000	₹1,640	SIT
Trasco GR 24 B/B	Steel	Polyurethane98 Sh A	10–32	55	55	78	60	14,000	₹2,450	SIT
Trasco GR 28 B/B	Steel	Polyurethane98 Sh A	10–38	65	65	90	160	11,800	₹3,130	SIT
Trasco GR 38 A/B	Cast iron	Polyurethane98 Sh A	10–38 / 12–45	80	66 / 80	114	325	7,100	₹3,530	SIT
Trasco GR 38 B/B	Cast iron	Polyurethane98 Sh A	12–45	80	80	114	325	7,100	₹3,530	SIT
Trasco GR 38 A/A	Cast iron	Polyurethane98 Sh A	10–38	80	66	114	325	7,100	₹3,530	SIT
Trasco GR 38 A/A	Steel	Polyurethane98 Sh A	10–38	80	66	114	325	9,500	₹4,370	SIT
Trasco GR 42 A/A	Cast iron	Polyurethane98 Sh A	10–42	95	75	126	450	6,000	₹4,740	SIT
Trasco GR 42 A/A	Steel	Polyurethane98 Sh A	10–42	95	75	126	450	8,000	₹5,860	SIT
Trasco GR 42 B/B	Cast iron	Polyurethane98 Sh A	12–55	95	95	126	450	6,000	₹4,740	SIT
Trasco GR 42 A/B	Cast iron	Polyurethane98 Sh A	10–42 / 12–55	95	75 / 95	126	450	6,000	₹4,740	SIT
Trasco GR 48 A/A	Cast iron	Polyurethane98 Sh A	12–48	105	85	140	525	5,600	₹5,660	SIT
Trasco GR 48 A/A	Steel	Polyurethane98 Sh A	12–48	105	85	140	525	7,100	₹7,000	SIT
Trasco GR 48 B/B	Cast iron	Polyurethane98 Sh A	12–60	105	105	140	525	5,600	₹5,660	SIT
Trasco GR 48 A/B	Cast iron	Polyurethane98 Sh A	12–48 / 12–60	105	85 / 105	140	525	5,600	₹5,660	SIT
Trasco GR 55 A/A	Cast iron	Polyurethane98 Sh A	15–55	120	98	160	680	4,750	₹7,210	SIT
Trasco GR 55 A/A	Steel	Polyurethane98 Sh A	15–55	120	98	160	680	6,300	₹8,920	SIT
Trasco GR 55 B/B	Cast iron	Polyurethane98 Sh A	15–70	120	120	160	680	4,750	₹7,210	SIT
Trasco GR 55 A/B	Cast iron	Polyurethane98 Sh A	15–55 / 15–70	120	98 / 120	160	680	4,750	₹7,210	SIT
Trasco GR 65 A/A	Cast iron	Polyurethane98 Sh A	15–65	135	115	185	950	4,250	₹8,960	SIT
Trasco GR 65 A/A	Steel	Polyurethane98 Sh A	15–65	135	115	185	950	5,600	₹11,100	SIT
Trasco GR 75 A/A	Cast iron	Polyurethane98 Sh A	15–75	160	135	210	1,950	3,550	₹12,350	SIT
Trasco GR 90 A/A	Cast iron	Polyurethane98 Sh A	20–90	200	160	245	3,600	2,800	₹18,970	SIT

L Series17 parts · Straight jaws with a cushioning NBR spider between the hubs. Sintered iron, aluminium or cast-iron hubs. Interchanges with most L-type couplings.

SW Series7 parts · Snap Wrap: a wrap-around NBR element held by a steel ring. The element is checked or replaced in minutes without moving the motor or the driven machine. Cast-iron hubs.