Seals for 45mm Shafts | McMaster-Carr

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43.000 mm to 48.000 mm

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

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7 Products

Bore-Sealing Spring-Loaded Rotary Shaft Seals with Wiper Lip


Side 1	Side 2	Profile

Ribbed Buna-N over steel creates a tight seal with the bore, even when mating with a rough surface or in a split housing. Also known as oil seals, these retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. They have a secondary lip that blocks contaminants and a spring that secures the sealing-lip to prevent leaks. Press-fit seals into the bore around the shaft. Seals with a maximum pressure of 145 psi should be secured with a retaining ring.

Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.

		Seal, mm			For Bore, mm
	For Shaft Dia., mm	ID	OD	Wd.	Dia.	Min.Wd.	Max. Rotation Speed, rpm	Max. Pressure, psi	Temp. Range, ° F	Hardness	Color	Specs. Met		Each
Buna-N with Steel Core and Steel Spring



		45	45.000	62.000	7.000	62.000	7.300	4,200	145	-40 to 212	Durometer 70A (Hard)	Black	—	00000000	00000


		45	45.000	75.000	8.000	75.000	8.300	5,800	7	-40 to 210	Durometer 75A (Hard)	Gray	DIN 3760, ISO 6194	0000000	0000

Shaft-Mounted Rotary Shaft Seals


Side 1	Side 2	Profile

Also known as V-rings and flingers, these seals protect shaft bearings by blocking dust and other contaminants while retaining lubricant. They’re Buna-N for excellent resistance to oil and grease. To install, stretch the seal over your shaft and press it firmly against the faceplate. The Seal OD and Seal Width listed are the dimensions of the seal after it is installed.

Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.

	For Shaft, mm			Seal, mm
	Dia.	Dia. Range	For Faceplate Dia., mm	ID	OD	Wd.	Max. Rotation Speed, rpm	Max. Pressure, psi	Temp. Range, ° F	Hardness	Color		Each
Buna-N



		45	43.000 to 48.000	43.000 to 48.000	40.000	50.000	5.000	3,000	5	-40 to 212	Durometer 60A (Medium)	Black	00000000	00000

Spring-Loaded Rotary Shaft Seals


Side 1	Side 2	Profile

Also known as oil seals, use these to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. A spring secures the lip against the shaft, preventing messy leaks. Press-fit seals into the bore around the shaft. Seals with a maximum pressure of 50 psi should be secured with a retaining ring.

Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.

Acrylic-Coated Case—Seals with an acrylic-coated case have a coating that compensates for surface imperfections in the housing bore for a tight seal on the OD.

		Seal, mm			For Bore, mm							Case
	For Shaft Dia., mm	ID	OD	Wd.	Dia.	Min.Wd.	Max. Rotation Speed, rpm	Max. Pressure, psi	Temp. Range, ° F	Hardness	Color	Finish	Color	Specs. Met		Each
Buna-N with Steel Case and Steel Spring



		45	45.000	75.000	8.000	75.000	8.300	3,100	10	-40 to 210	Durometer 75A (Hard)	Black	Acrylic Coated	Green	DIN 3760, ISO 6194	0000000	000000

Mechanical Pump Shaft Seals with Extended Spring

Seal with Retainer

and Straight Spring

For use in waste water, boiler feed, and compressor pumps, these seals have an extra-long spring that accommodates variations in seal cavity length. They come furnished as two pieces—the seal and the seat. The seal is comprised of the case, spring, diaphragm, and washer, which come locked together as one piece. Seal Width represents the working height, which is the compressed length when installed. The seat is comprised of the seat and the gasket.

Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.

Buna-N Diaphragm—Buna-N diaphragms resist grease and a wide range of oils.

Buna-N Gasket—Buna-N gaskets resist grease and a wide range of oils.

Carbon Washer—Carbon washers are for use with clean liquids.

Cannot Be Sold Outside North America—Products cannot be sold outside North America due to restrictions.

			Seal, mm			Seat, mm			Material
	For Shaft Dia., mm	Mfr./Brand Equiv.	ID	OD	Wd.	ID	OD	Wd.	Washer	Seat	Spring Shape	Includes	Max. Pressure, psi	Cannot Be Sold To		Each
304 Stainless Steel Case and 304 Stainless Steel Spring with Buna-N Diaphragm and Buna-N Gasket



		45	John Crane Type 21 Pac-Seal Type 21 Pac-Seal Type 31 Sealol Type 43 CE Short Sealol Type 43 CU Short	45.000	65.100	38.000	47.100	63.500	12.750	Carbon	Ceramic	Straight	Spring Retainer	250	Outside North America	00000000	0000000

Cartridge Mechanical Shaft Seals

Install these seals faster and with less technical expertise than other mechanical shaft seals that come in two pieces. They come with their seal and seat already assembled. All have a carbon washer that is self-lubricating. However, this means their washer is too soft to be used with abrasive liquids and liquids with harsh additives.

Fluoroelastomer Diaphragm—Seals with a fluoroelastomer diaphragm can be used with a wider range of chemicals than EPDM diaphragms, including benzene, butyl alcohol, and fuels.

EPDM Diaphragm—Seals with an EPDM diaphragm won’t break down from exposure to water and steam. However, they are for use with fewer chemicals.

		Seal, mm				Fluoroelastomer Diaphragm		EPDM Diaphragm
	For Shaft Dia., mm	ID	OD	Wd.	Max. Pressure, psi		Each		Each
316 Stainless Steel Case and C276 Nickel Spring with PTFE Gasket



		45	45	90.5	71.5	220	0000000	000000000	0000000	000000000