Oil Seals
At Anchor Seals Inc., we have a large selection of radial lip oil seals in stock and ready to ship to help ensure consistent and reliable performance of your rotating equipment.
Radial lip oil seals keep lubricant in and contamination out of bearing housings on pumps, motors, gearboxes, rolls, and fans. Anchor Seals Inc. stocks external, face-type, and split oil seals in metal case and reinforced rubber OD designs covering shaft diameters from 0.750 inch to 120 inches.
Split seal styles install without removing bearings, couplings, or the shaft, which keeps repairs on large steel mill, paper machine, and power plant equipment to hours instead of days. The tables below list each model's description, shaft range, allowable misalignment and runout by surface speed, pressure rating, and spring configuration. Visit the Radial Lip Oil Seals page for full details, or contact our engineers to match a model to your equipment.
External Oil Seals
Assembled metal case designs that mount outside the housing and seal against the shaft OD. Stainless Steel finger springs, pressure to 7 psi.
| Model | Description & Features | Shaft Diameter | Misalignment & Runout | Pressure | Spring |
|---|---|---|---|---|---|
| Model 111 | External lip seal. Heavy-duty metal outer case; low speed service; assembled design. | 3″ to 50″Shaft Dia. | 0.010 @ 500 fpm0.005 @ 1000 fpm | To 7 psi | Stainless Steel Finger |
| Model 113 | External lip seal. Heavy-duty metal outer case; assembled design. | 3″ to 50″Shaft Dia. | 0.020 @ 1000 fpm0.100 @ 2000 fpm0.005 @ 3000 fpm | To 7 psi | Stainless Steel Finger |
| Model 123 | External lip seal design for moderate speed service applications. Assembled seal design with flexible elastomeric sealing element; Stainless Steel finger spring and metal case construction. | 1.156″ to 50″Shaft Dia. | 0.020 @ 1000 fpm0.100 @ 2000 fpm0.500 @ 3000 fpm | To 7 psi | Stainless Steel Finger |
| Model 26E | General purpose external seal; solid design. Reverse bevel lip design prevents lip rollover; reinforced rubber OD; single and dual lip configurations available. | 1″ to 60″Shaft Dia. | 0.150 @ 1000 fpm0.010 @ 2000 fpm0.008 @ 4000 fpm | To 7 psi | Stainless Steel Finger |
Misalignment and runout values are total indicator readings in inches at the listed shaft surface speed in feet per minute.
Face Oil Seals
Face-type excluder seals that run against a perpendicular surface rather than the shaft. Flexible lips maintain continuous contact in high-speed service.
| Model | Description & Features | Shaft Diameter | Pressure | Spring |
|---|---|---|---|---|
| Model 143 | Face-type excluder seal; split design. High-speed service; Stainless Steel clamp. | 6″ to 80″Shaft Dia. | N/A | N/A |
| Model 145A | Face-type excluder seal. Flexible sealing lip provides continuous contact with perpendicular surfaces. | 0.110″ to 8.272″Shaft Dia. | N/A | N/A |
| Model 145A1 | Face-type excluder seal; solid design. High-speed service; designed for 2.000″ ± 0.500″ assembled width. | 17″ to 80″Shaft Dia. | Ambient | Stainless Steel Garter |
| Model 145A2 | Face-type excluder seal; solid design. High-speed service; designed for 0.781″ ± 0.156″ assembled width. | 7″ to 80″Shaft Dia. | N/A | Stainless Steel Garter |
| Model 145L | Face-type excluder seal. Flexible sealing lip provides continuous contact with perpendicular surfaces. | 5.320″ to 18.7″Shaft Dia. | N/A | N/A |
| Model 145S | Face-type excluder seal. Flexible sealing lip provides continuous contact with perpendicular surfaces. | 0.181″ to 8.272″Shaft Dia. | N/A | N/A |
N/A indicates a rating that is not published for that style. Contact us for application specific limits.
Split Oil Seals
Install without pulling the shaft, bearings, or coupling. Reverse bevel lips prevent rollover, reinforced rubber ODs seat in the groove, and most styles use a cover plate.
| Model | Description & Features | Shaft Diameter | Misalignment & Runout | Pressure | Spring |
|---|---|---|---|---|---|
| Model 151 | Reinforced rubber OD; ideal for low speed applications; includes a Stainless Steel Garter spring; cover plate required. | 3″ to 50″Shaft Dia. | N/A | N/A | Stainless Steel Garter |
| Model 154 | Protected Garter spring to avoid dislodging; reverse bevel lip to prevent lip rollover; includes a Stainless Steel Garter spring; reinforced rubber OD; excels in environments where corrosion is typically a problem; cover plate required. | 3″ to 50″Shaft Dia. | N/A | N/A | Stainless Steel Garter |
| Model 154R1 | Protected Garter spring to avoid dislodging; supplementary dust lip provides greater protection from foreign bodies that can deteriorate the main lip; includes a Stainless Steel Garter spring; reverse bevel lip to prevent lip rollover; reinforced rubber OD; cover plate required. | 3″ to 50″Shaft Dia. | N/A | N/A | Stainless Steel Garter |
| Model 21 | General purpose split seal. Low-speed service seal; cover plate required. | 3″ to 42″Shaft Dia. | 0.010 @ 500 fpm0.005 @ 1000 fpm | N/A | Molded-in Stainless Steel Finger |
| Model 23 | General purpose split seal. Cover plate required; over 300,000 sizes readily available. | 3″ to 120″Shaft Dia. | 0.010 @ 1000 fpm0.005 @ 2000 fpm | To 7 psi | Molded-in Stainless Steel Finger |
| Model 24 | General purpose split seal for tapered housing grooves. Low-speed service; tapered OD. | 3″ to 21.5″Shaft Dia. | 0.010 @ 500 fpm0.005 @ 1000 fpm | N/A | Molded-in Stainless Steel Finger |
| Model 25 | PTFE split seal. Low-speed service; chemical resistance; cover plate required. | 3″ to 20″Shaft Dia. | 0.010 @ 500 fpm0.005 @ 1000 fpm | N/A | Carbon Steel Garter |
| Model 26 | General purpose seal; solid or split design. Reverse bevel lip design prevents lip rollover; reinforced rubber OD; single and dual lip configurations available. | 0.750″ to 60″Shaft Dia. | N/A | N/A | N/A |
| Model 26R1 | General purpose dual lip seal. Low-speed service; reverse bevel lip design prevents lip rollover. | 0.750″ to 60″Shaft Dia. | N/A | N/A | N/A |
Frequently Asked Questions
What is a radial lip oil seal?
A radial lip seal, also called a shaft seal or oil seal, is a flexible elastomer lip held against a rotating shaft by a garter or finger spring. It keeps lubricant inside the bearing housing and keeps dirt, water, and process contamination out. The seal body is either a metal case pressed into the housing bore or a reinforced rubber OD that seats in a groove or under a cover plate.
What is the difference between external, face, and split oil seals?
External seals mount around the outside of the housing and seal against the shaft OD, typically in an assembled metal case design. Face seals seal axially against a perpendicular surface rather than radially against the shaft and are used as excluders in high-speed service. Split seals are cut so they can be installed without removing bearings, couplings, or the shaft, which makes them the fastest repair option on large equipment.
When should I choose a split seal over a solid seal?
Choose a split seal whenever disassembling the equipment to install a solid seal would cost more in downtime than the seal itself. Split designs are standard on large shafts in steel mills, paper machines, and power plants where pulling a shaft is a major job. Most split styles require a cover plate to hold the seal in the housing.
What does misalignment and runout at fpm mean?
It is the maximum total shaft misalignment or dynamic runout, in inches, that the seal lip can follow at a given surface speed in feet per minute. Higher speeds leave less time for the lip to follow the shaft, so the allowable runout drops as fpm rises. Match your shaft speed and measured runout to the table to confirm a style will track properly.
What shaft sizes can Anchor Seals Inc. supply?
Stocked radial lip styles cover shaft diameters from 0.750 inch up to 120 inches, and the Model 23 split seal alone is available in more than 300,000 sizes. Send us the shaft diameter, bore diameter, and groove or housing width and we will match a model.
Are oil seals in stock and ready to ship?
Yes. Anchor Seals Inc. keeps a large in-stock selection of radial lip oil seals ready to ship so that a failed seal does not turn into an extended outage. Contact us for immediate availability on a specific size.
