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National Oil Seal 25X52X7 Metric Multi-Lip Oil Seal 25mm x 52mm x 7mm

Part of: National Oil Seal Multi-Lip Oil Seal

Other options in this family: National Oil Seal 471765 National Oil Seal 473229 National Oil Seal 473517 National Oil Seal 416664 National Oil Seal 471808

Manufacturer

Picture for manufacturer National Oil Seal

Part Number

25X52X7
6 reviews
Sale Price

$8.63

2 left at this price

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Usually delivered within 2 days

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Product Details

The National Oil Seal 25X52X7 is a metric rotary shaft oil seal designed to prevent fluid leakage and block contaminants from entering rotating shaft assemblies. With an inside diameter of 25mm, outside diameter of 52mm, and a width of 7mm, this seal is engineered for precision fit in metric-dimensioned housings and shafts.

Constructed with a nitrile (NBR) rubber lip and a steel-reinforced case, this seal features a multi-lip design with a spring-loaded primary lip that maintains consistent radial contact pressure against the shaft for reliable, long-lasting sealing performance. The secondary dust lip provides an additional barrier against dirt, moisture, and other external contaminants.

Key Features:

  • Inner Diameter (ID): 25 mm
  • Outer Diameter (OD): 52 mm (52.27 mm actual)
  • Width: 7 mm
  • Seal Type: Multi-Lip with Loaded Spring
  • Lip Material: Nitrile (NBR) — 60 to 80 Durometer
  • Case Construction: Steel-reinforced solid body
  • Temperature Range: -30°C to +100°C (-22°F to +212°F)
  • Compatible fluids: Engine oil, gear oil, grease, petroleum-based fluids

This metric oil seal is widely used across automotive, powersports, industrial, and marine applications including gearboxes, differentials, crankshafts, electric motors, hydraulic pumps, and agricultural equipment. The nitrile compound offers excellent resistance to hydrocarbon-based fluids and good performance in low-temperature environments.

Products specifications

Agricultural Equipment

N

Application Specific

Y

Car Light Truck

N

Engine Specific

N

Freight Class

60

Heavy Duty Truck

N

High Performance

Y

Industrial Off Highway Equipment

N

Marine

N

Material

Nitrile

Medium Duty Truck

N

Motorcycle ATV

N

Non Vehicle Specific

N

Personal WaterCraft

N

Small Engine

N

SnowMobile

N

Transmission Specific

N

Feature 2

Design Type: Spring Loaded; Multi-Lip

Feature 3

Provides good low temperature capability

Feature 4

Low swell in hydrocarbon fluids

Feature 5

Temperature Range: -40F to 225F; -40C to 107C

Outside Diameter (mm)

52.270

Part Description

Oil Seal

Part Type

Seals

Series

METRIC

Type

32

WIDTH (MM)

7.000

Housing Bore (Inch)

2.047

Housing Bore (MM)

52.000

Shaft (Inch)

0.984

Shaft (MM)

25.000

Shaft Size (Inch)

0.984

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