Seals for 2 7/8" Shafts | McMaster-Carr

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System of Measurement

Seal OD

Seal ID

Material

300 Series Stainless Steel

Bore Diameter

For Use With

Diluted Salt Solutions

Seal Width

Maximum Rotation Speed

2,400 rpm

6,600 rpm

Rotation Speed

2,000 rpm to 2,999 rpm

3,000 rpm to 9,999 rpm

Performance

Maximum Pressure

Hardness Rating

Color

Hardness

O-Ring Material

REACH

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

RoHS

Compliant

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

For Minimum Bore Width

Minimum Temperature

Maximum Temperature

Loaded Type

For Sealing

4 Products

High-Speed Rotary Shaft Seals


Side 1	Side 2	Profile

A slippery PTFE surface allows these seals to function at speeds at least 25% faster than other rotary shaft seals. Also known as oil seals, use these to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes. An O-ring secures the lips to prevent leaks, while sealing against the housing. Press-fit seals into the bore around the shaft.

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

		Seal			For Bore							O-Ring
	For Shaft Dia.	ID	OD	Wd.	Dia.	Min.Wd.	Max. Rotation Speed, rpm	Max. Pressure, psi	Temp. Range, ° F	Hardness	Color	Hardness	Color		Each
Graphite Filled PTFE with Buna-N O-Ring



		2 7/8"	2.875"	3.375"	0.313"	3.375"	0.323"	6,600	150	-40 to 250	Durometer 60D (Extra Hard)	Black	Durometer 70A (Hard)	Black	2122N29	000000

Heavy Duty Shaft-Mounted Rotary Shaft Seals


Side 1	Side 2	Profile

These seals are fluoroelastomer, so they have excellent chemical resistance and withstand temperatures up to 390° F. Also known as V-rings and flingers, they protect shaft bearings by blocking dust and other contaminants while retaining lubricant. To install, stretch the seal over your shaft and press it firmly against the face plate.

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

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



		2 3/4", 2 7/8"	2.677" to 2.874"	3.386" to 3.583"	2.480"	2.953"	0.433"	2,400	5	5 to 390	Durometer 60A (Medium)	Brown	1670N28	000000

Spring-Loaded Rotary Shaft Seals with Wiper Lip


Side 1	Side 2	Profile

Used to retain oil on rotating shafts in motors, pumps, bearings, and gearboxes, these seals have a secondary lip that blocks contaminants. Also known as oil seals, 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			For Bore							Case
	For Shaft Dia.	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



		2 7/8"	2.875"	3.750"	0.375"	3.750"	0.391"	2,400	10	-40 to 210	Durometer 80A (Hard)	Black	Acrylic Coated	Green	DIN 3760, ISO 6194	5154T848	000000

Shaft Repair Sleeves

Also known as speedi sleeves, use these to repair and protect worn shafts for a smooth sealing surface without machining. Each sleeve comes with an installation tool. To install, place the installation tool around the sleeve and gently tap the installation tool until the sleeve covers the worn shaft surface.

	For Shaft				Flange
	Dia.	Dia. Tolerance	Max. Installed Dp.	Sealing Face Wd.	OD	Wd.	Sleeve Thk.		Each
300 Series Stainless Steel



		2 7/8"	2.873" to 2.879"	1.250"	0.781"	3.219"	0.157"	0.011"	5187T36	000000