Oldham Couplings | McMaster-Carr

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54 Products

About Shaft Couplings

Components of a Coupling Shown Assembled

(Each Component Sold Separately)

Designed to grip evenly around your shaft, these couplings provide more holding power than set screw couplings without marring the shaft. Tighten the clamping screws to secure. Also known as Oldham couplings, they have a slotted disc that allows hubs to slide independently—good for applications with parallel shaft misalignment. They also allow zero backlash (no play) and never need lubrication.

A complete coupling consists of two hubs and one disc (each component sold separately).

Aluminum hubs are lightweight and have good corrosion resistance. Stainless steel hubs offer excellent corrosion resistance.

Acetal discs stand up to high twisting forces. Nylon discs have excellent vibration and shock absorption. PEEK discs have excellent impact resistance and the chemical resistance to withstand a variety of acids and other harsh substances.

For technical drawings and 3-D models, click on a part number.

2024 Aluminum Hubs and Acetal Plastic Discs

							Acetal Plastic Discs
2024 Aluminum Hubs									Misalignment Capability
O'all Lg.	OD	For Shaft Type	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Axial	Temp. Range, °F		Each
1"	3/4"	Round	Forward/Reverse, Start/Stop	3/16", 1/4", 5/16", 3/8", 4mm, 5mm, 6mm, 7mm, 8mm	000000	000000	4,500	93	0.008"	0.5°	0.004"	-10° to 150°	00000000	00000
1 1/4"	1"	Round	Forward/Reverse, Start/Stop	1/4", 5/16", 3/8", 1/2", 6mm, 8mm, 9mm, 10mm, 11mm, 12mm	000000	00000	4,500	165	0.008"	0.5°	0.004"	-10° to 150°	00000000	00000
1 1/4"	1"	Keyed	Forward/Reverse, Start/Stop	8mm, 12mm	0000000	00000	4,500	165	0.008"	0.5°	0.004"	-10° to 150°	00000000	00000
1 7/8"	1 5/16"	Round	Forward/Reverse, Start/Stop	5/16", 3/8", 1/2", 5/8", 8mm, 9mm, 10mm, 11mm, 12mm, 14mm, 15mm, 16mm	000000	00000	4,500	350	0.008"	0.5°	0.006"	-10° to 150°	00000000	00000
1 7/8"	1 5/16"	Keyed	Forward/Reverse, Start/Stop	12mm, 15mm	0000000	00000	4,500	350	0.008"	0.5°	0.006"	-10° to 150°	00000000	00000
2"	1 5/8"	Round	Forward/Reverse, Start/Stop	3/8", 1/2", 5/8", 3/4", 10mm, 11mm, 12mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm	000000	00000	4,500	480	0.01"	0.5°	0.006"	-10° to 150°	00000000	00000
2"	1 5/8"	Keyed	Forward/Reverse, Start/Stop	12mm, 16mm, 17mm, 19mm, 20mm	0000000	00000	4,500	480	0.01"	0.5°	0.006"	-10° to 150°	00000000	00000
2 3/8"	2"	Round	Forward/Reverse, Start/Stop	25mm	00000000	00000	4,500	250	0.01"	0.5°	0.008"	-10° to 150°	000000000	00000
3 1/8"	2 1/4"	Round	Forward/Reverse, Start/Stop	14mm, 19mm	0000000	000000	4,500	375	0.01"	0.5°	0.008"	-10° to 150°	000000000	00000
3 1/8"	2 1/4"	Keyed	Forward/Reverse, Start/Stop	14mm, 19mm, 24mm	0000000	000000	4,500	375	0.01"	0.5°	0.008"	-10° to 150°	000000000	00000

2024 Aluminum Hubs and Nylon Plastic Discs

							Nylon Plastic Discs
2024 Aluminum Hubs									Misalignment Capability
O'all Lg.	OD	For Shaft Type	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Axial	Temp. Range, °F		Each
1"	3/4"	Round	Forward/Reverse, Start/Stop	3/16", 1/4", 5/16", 3/8", 4mm, 5mm, 6mm, 7mm, 8mm	000000	000000	4,500	85	0.008"	0.5°	0.004"	-10° to 130°	00000000	000000
1 1/4"	1"	Round	Forward/Reverse, Start/Stop	1/4", 5/16", 3/8", 1/2", 6mm, 8mm, 9mm, 10mm, 11mm, 12mm	000000	00000	4,500	140	0.008"	0.5°	0.004"	-10° to 130°	00000000	00000
1 1/4"	1"	Keyed	Forward/Reverse, Start/Stop	8mm, 12mm	0000000	00000	4,500	140	0.008"	0.5°	0.004"	-10° to 130°	00000000	00000
1 7/8"	1 5/16"	Round	Forward/Reverse, Start/Stop	5/16", 3/8", 1/2", 5/8", 8mm, 9mm, 10mm, 11mm, 12mm, 14mm, 15mm, 16mm	000000	00000	4,500	300	0.008"	0.5°	0.006"	-10° to 130°	00000000	00000
1 7/8"	1 5/16"	Keyed	Forward/Reverse, Start/Stop	12mm, 15mm	0000000	00000	4,500	300	0.008"	0.5°	0.006"	-10° to 130°	00000000	00000
2"	1 5/8"	Round	Forward/Reverse, Start/Stop	3/8", 1/2", 5/8", 3/4", 10mm, 11mm, 12mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm	000000	00000	4,500	400	0.01"	0.5°	0.006"	-10° to 130°	00000000	00000
2"	1 5/8"	Keyed	Forward/Reverse, Start/Stop	12mm, 16mm, 17mm, 19mm, 20mm	0000000	00000	4,500	400	0.01"	0.5°	0.006"	-10° to 130°	00000000	00000

2024 Aluminum Hubs and PEEK Plastic Discs

							PEEK Plastic Discs
2024 Aluminum Hubs									Misalignment Capability
O'all Lg.	OD	For Shaft Type	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Axial	Temp. Range, °F		Each
1"	3/4"	Round	Forward/Reverse, Start/Stop	3/16", 1/4", 5/16", 3/8", 4mm, 5mm, 6mm, 7mm, 8mm	000000	000000	4,500	20	0.008"	0.5°	0.004"	-10° to 300°	000000000	000000
1 1/4"	1"	Round	Forward/Reverse, Start/Stop	1/4", 5/16", 3/8", 1/2", 6mm, 8mm, 9mm, 10mm, 11mm, 12mm	000000	00000	4,500	42	0.008"	0.5°	0.004"	-10° to 300°	000000000	00000
1 1/4"	1"	Keyed	Forward/Reverse, Start/Stop	8mm, 12mm	0000000	00000	4,500	42	0.008"	0.5°	0.004"	-10° to 300°	000000000	00000
1 7/8"	1 5/16"	Round	Forward/Reverse, Start/Stop	5/16", 3/8", 1/2", 5/8", 8mm, 9mm, 10mm, 11mm, 12mm, 14mm, 15mm, 16mm	000000	00000	4,500	70	0.008"	0.5°	0.006"	-10° to 300°	000000000	00000
1 7/8"	1 5/16"	Keyed	Forward/Reverse, Start/Stop	12mm, 15mm	0000000	00000	4,500	70	0.008"	0.5°	0.006"	-10° to 300°	000000000	00000
2"	1 5/8"	Round	Forward/Reverse, Start/Stop	3/8", 1/2", 5/8", 3/4", 10mm, 11mm, 12mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm	000000	00000	4,500	130	0.01"	0.5°	0.006"	-10° to 300°	000000000	00000
2"	1 5/8"	Keyed	Forward/Reverse, Start/Stop	12mm, 16mm, 17mm, 19mm, 20mm	0000000	00000	4,500	130	0.01"	0.5°	0.006"	-10° to 300°	000000000	00000
2 3/8"	2"	Round	Forward/Reverse, Start/Stop	25mm	00000000	00000	4,500	250	0.01"	0.5°	0.008"	-10° to 300°	000000000	00000
3 1/8"	2 1/4"	Round	Forward/Reverse, Start/Stop	14mm, 19mm	0000000	000000	4,500	375	0.01"	0.5°	0.008"	-10° to 300°	000000000	00000
3 1/8"	2 1/4"	Keyed	Forward/Reverse, Start/Stop	14mm, 19mm, 24mm	0000000	000000	4,500	375	0.01"	0.5°	0.008"	-10° to 300°	000000000	00000

303 Stainless Steel Hubs and Acetal Plastic Discs

							Acetal Plastic Discs
303 Stainless Steel Hubs									Misalignment Capability
O'all Lg.	OD	For Shaft Type	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Axial	Temp. Range, °F		Each
1"	3/4"	Round	Forward/Reverse, Start/Stop	7mm, 8mm	0000000	000000	4,500	93	0.008"	0.5°	0.004"	-10° to 150°	00000000	00000
1 1/4"	1"	Round	Forward/Reverse, Start/Stop	10mm, 11mm	0000000	000000	4,500	165	0.008"	0.5°	0.004"	-10° to 150°	00000000	00000
2"	1 5/8"	Round	Forward/Reverse, Start/Stop	20mm	00000000	000000	4,500	480	0.01"	0.5°	0.006"	-10° to 150°	00000000	00000

303 Stainless Steel Hubs and Nylon Plastic Discs

							Nylon Plastic Discs
303 Stainless Steel Hubs									Misalignment Capability
O'all Lg.	OD	For Shaft Type	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Axial	Temp. Range, °F		Each
1"	3/4"	Round	Forward/Reverse, Start/Stop	7mm, 8mm	0000000	000000	4,500	85	0.008"	0.5°	0.004"	-10° to 130°	00000000	000000
1 1/4"	1"	Round	Forward/Reverse, Start/Stop	10mm, 11mm	0000000	000000	4,500	140	0.008"	0.5°	0.004"	-10° to 130°	00000000	00000
2"	1 5/8"	Round	Forward/Reverse, Start/Stop	20mm	00000000	000000	4,500	400	0.01"	0.5°	0.006"	-10° to 130°	00000000	00000

303 Stainless Steel Hubs and PEEK Plastic Discs

							PEEK Plastic Discs
303 Stainless Steel Hubs									Misalignment Capability
O'all Lg.	OD	For Shaft Type	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Axial	Temp. Range, °F		Each
1"	3/4"	Round	Forward/Reverse, Start/Stop	7mm, 8mm	0000000	000000	4,500	20	0.008"	0.5°	0.004"	-10° to 300°	000000000	000000
1 1/4"	1"	Round	Forward/Reverse, Start/Stop	10mm, 11mm	0000000	000000	4,500	42	0.008"	0.5°	0.004"	-10° to 300°	000000000	00000
2"	1 5/8"	Round	Forward/Reverse, Start/Stop	20mm	00000000	000000	4,500	130	0.01"	0.5°	0.006"	-10° to 300°	000000000	00000

Set Screw High-Parallel-Misalignment Flexible Shaft Couplings

Components of a Coupling Shown Assembled

(Each Component Sold Separately)

Each hub includes a set screw, which bites into your shaft to hold the coupling in place. Also known as Oldham couplings, these couplings have a slotted disc that allows hubs to slide independently—good for applications with parallel shaft misalignment. They also allow zero backlash (no play) and never need lubrication.

A complete coupling consists of two hubs and one disc (each component sold separately). Hubs are made of aluminum, so they’re lightweight and have good corrosion resistance.

For technical drawings and 3-D models, click on a part number.

2024 Aluminum Hubs and Acetal Plastic Discs

							Acetal Plastic Discs
2024 Aluminum Hubs									Misalignment Capability
Overall Lg.	OD	For Shaft Type	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Axial	Temp. Range, °F		Each
5/8"	1/2"	Round	Forward/Reverse, Start/Stop	1/8", 3/16", 1/4", 3mm, 4mm, 5mm, 6mm	0000000	000000	4,500	34	0.004"	0.5°	0.002"	-10° to 150°	00000000	00000
7/8"	3/4"	Round	Forward/Reverse, Start/Stop	3/16", 1/4", 5/16", 3/8", 4mm, 5mm, 6mm, 8mm	0000000	00000	4,500	93	0.008"	0.5°	0.004"	-10° to 150°	00000000	0000
1 1/8"	1"	Round	Forward/Reverse, Start/Stop	1/4", 5/16", 3/8", 1/2", 6mm, 8mm, 9mm, 10mm, 12mm	0000000	00000	4,500	165	0.008"	0.5°	0.004"	-10° to 150°	00000000	00000
1 7/8"	1 5/16"	Round	Forward/Reverse, Start/Stop	5/16", 3/8", 1/2", 5/8", 8mm, 10mm, 12mm, 14mm, 15mm, 16mm	0000000	00000	4,500	350	0.008"	0.5°	0.006"	-10° to 150°	00000000	00000
1 7/8"	1 5/16"	Keyed	Forward/Reverse, Start/Stop	10mm, 14mm	00000000	00000	4,500	350	0.008"	0.5°	0.006"	-10° to 150°	00000000	00000
2"	1 5/8"	Round	Forward/Reverse, Start/Stop	3/8", 1/2", 5/8", 3/4", 10mm, 14mm, 20mm	0000000	00000	4,500	480	0.01"	0.5°	0.006"	-10° to 150°	00000000	00000
2"	1 5/8"	Keyed	Forward/Reverse, Start/Stop	12mm, 14mm	00000000	00000	4,500	480	0.01"	0.5°	0.006"	-10° to 150°	00000000	00000

2024 Aluminum Hubs and Nylon Plastic Discs

							Nylon Plastic Discs
2024 Aluminum Hubs									Misalignment Capability
Overall Lg.	OD	For Shaft Type	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Axial	Temp. Range, °F		Each
5/8"	1/2"	Round	Forward/Reverse, Start/Stop	1/8", 3/16", 1/4", 3mm, 4mm, 5mm, 6mm	0000000	000000	4,500	25	0.004"	0.5°	0.002"	-10° to 130°	00000000	000000
7/8"	3/4"	Round	Forward/Reverse, Start/Stop	3/16", 1/4", 5/16", 3/8", 4mm, 5mm, 6mm, 8mm	0000000	00000	4,500	85	0.008"	0.5°	0.004"	-10° to 130°	00000000	00000
1 1/8"	1"	Round	Forward/Reverse, Start/Stop	1/4", 5/16", 3/8", 1/2", 6mm, 8mm, 9mm, 10mm, 12mm	0000000	00000	4,500	140	0.008"	0.5°	0.004"	-10° to 130°	00000000	00000
1 7/8"	1 5/16"	Round	Forward/Reverse, Start/Stop	5/16", 3/8", 1/2", 5/8", 8mm, 10mm, 12mm, 14mm, 15mm, 16mm	0000000	00000	4,500	300	0.008"	0.5°	0.006"	-10° to 130°	00000000	00000
1 7/8"	1 5/16"	Keyed	Forward/Reverse, Start/Stop	10mm, 14mm	00000000	00000	4,500	300	0.008"	0.5°	0.006"	-10° to 130°	00000000	00000
2"	1 5/8"	Round	Forward/Reverse, Start/Stop	3/8", 1/2", 5/8", 3/4", 10mm, 14mm, 20mm	0000000	00000	4,500	400	0.01"	0.5°	0.006"	-10° to 130°	00000000	00000
2"	1 5/8"	Keyed	Forward/Reverse, Start/Stop	12mm, 14mm	00000000	00000	4,500	400	0.01"	0.5°	0.006"	-10° to 130°	00000000	00000

2024 Aluminum Hubs and PEEK Plastic Discs

							PEEK Plastic Discs
2024 Aluminum Hubs									Misalignment Capability
Overall Lg.	OD	For Shaft Type	For Motion Type	For Shaft Dia.		Each	Max. Speed, rpm	Max. Torque, in.-lbs.	Parallel	Angular	Axial	Temp. Range, °F		Each
5/8"	1/2"	Round	Forward/Reverse, Start/Stop	1/8", 3/16", 1/4", 3mm, 4mm, 5mm, 6mm	0000000	000000	4,500	6	0.004"	0.5°	0.002"	-10° to 300°	000000000	000000
7/8"	3/4"	Round	Forward/Reverse, Start/Stop	3/16", 1/4", 5/16", 3/8", 4mm, 5mm, 6mm, 8mm	0000000	00000	4,500	20	0.008"	0.5°	0.004"	-10° to 300°	000000000	00000
1 1/8"	1"	Round	Forward/Reverse, Start/Stop	1/4", 5/16", 3/8", 1/2", 6mm, 8mm, 9mm, 10mm, 12mm	0000000	00000	4,500	42	0.008"	0.5°	0.004"	-10° to 300°	000000000	00000
1 7/8"	1 5/16"	Round	Forward/Reverse, Start/Stop	5/16", 3/8", 1/2", 5/8", 8mm, 10mm, 12mm, 14mm, 15mm, 16mm	0000000	00000	4,500	70	0.008"	0.5°	0.006"	-10° to 300°	000000000	00000
1 7/8"	1 5/16"	Keyed	Forward/Reverse, Start/Stop	10mm, 14mm	00000000	00000	4,500	70	0.008"	0.5°	0.006"	-10° to 300°	000000000	00000
2"	1 5/8"	Round	Forward/Reverse, Start/Stop	3/8", 1/2", 5/8", 3/4", 10mm, 14mm, 20mm	0000000	00000	4,500	130	0.01"	0.5°	0.006"	-10° to 300°	000000000	00000
2"	1 5/8"	Keyed	Forward/Reverse, Start/Stop	12mm, 14mm	00000000	00000	4,500	130	0.01"	0.5°	0.006"	-10° to 300°	000000000	00000

Cleaned and Bagged Flexible Shaft Couplings

Often used in electronics manufacturing facilities and other extra-clean environments, these shaft couplings are cleaned and individually bagged to keep out contaminants. Their plastic center also doesn’t outgas much, helping keep contaminants low as well. All are compatible with most commercial acids except concentrated nitric and sulfuric acid. Also known as Oldham couplings, their slotted center lets the hubs slide independently, so they’re good for applications with parallel shaft misalignment. They have zero backlash (no play) and never require lubrication.

For technical drawings and 3-D models, click on a part number.

					Misalignment Capability
For Shaft Diameter	Overall Length, mm	OD, mm	Maximum Speed, rpm	Maximum Torque, in.-lbs.	Parallel, mm	Angular	For Motion Type	Temperature Range, °F		Each
2017 Aluminum with PEEK Plastic Center
5 mm × 5 mm	22	20	31,000	10	1.3	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	0000000
5 mm × 6 mm	22	20	31,000	10	1.3	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
5 mm × 8 mm	22	20	31,000	10	1.3	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
6 mm × 6 mm	22	20	31,000	10	1.3	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
6 mm × 8 mm	22	20	31,000	10	1.3	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
8 mm × 8 mm	27	25	25,000	20	1.5	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
8 mm × 10 mm	27	25	25,000	20	1.5	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
10 mm × 10 mm	33	32	19,000	45	2	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
10 mm × 11 mm	33	32	19,000	45	2	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
10 mm × 12 mm	33	32	19,000	45	2	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
10 mm × 14 mm	33	32	19,000	45	2	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
11 mm × 11 mm	33	32	19,000	45	2	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
11 mm × 12 mm	33	32	19,000	45	2	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
11 mm × 14 mm	33	32	19,000	45	2	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000
12 mm × 12 mm	33	32	19,000	45	2	2°	Forward/Reverse, Start/Stop	0° to 240°	0000000	000000

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About Shaft Couplings

Clamping High-Parallel-Misalignment Flexible Shaft Couplings

Set Screw High-Parallel-Misalignment Flexible Shaft Couplings

Cleaned and Bagged Flexible Shaft Couplings