Rotary Shaft Seal 42,86x63,5x9,52 NBR SC Oil Seal Single Lip

Overview

NBR 42.86x63.5x9.52 A is a single lip radial shaft seal with a 42.86 mm inside diameter, 63.5 mm outside diameter and 9.52 mm width. The A design uses a spring-loaded primary sealing lip contacting the rotating shaft. Without an auxiliary dust lip, this configuration provides lower friction than comparable double lip designs and is suitable for relatively clean operating environments.

Industrial Applications

The 42.86x63.5x9.52 NBR shaft seal is suitable for appropriately designed gearboxes, reduction drives, pumps, drive systems and industrial rotary equipment. Its specific dimensions are particularly relevant during maintenance and rebuilding of imported or older machinery where the original shaft diameter, housing bore and seal width must be retained accurately.

Construction

The A profile uses a single primary radial sealing lip energized by a garter spring. The spring maintains controlled contact between the sealing edge and rotating shaft to retain oil or grease. The elastomer-covered outside diameter provides static sealing in the housing bore. This design does not incorporate an additional dust lip.

Material

NBR, or Nitrile Butadiene Rubber, provides good resistance to many mineral oils, lubricating greases and compatible technical fluids, together with useful wear resistance. A typical operating range for NBR shaft seals is approximately -40 to +100 degrees C, depending on lubricant, shaft speed and actual operating conditions.

Technical Specification

Type: Single lip radial shaft seal / oil seal
Material: NBR - Nitrile Butadiene Rubber
Design: A, single lip
Inner Diameter: 42.86 mm
Outer Diameter: 63.5 mm
Width: 9.52 mm
Temperature Range: Typically -40 to +100 degrees C
Application: Gearboxes, reduction drives, pumps and industrial rotary equipment

Why Industrial Buyers Choose This Product

The 42.86x63.5x9.52 A seal is suitable for OEM replacement, maintenance stock and industrial service where precise sealing dimensions must be retained. Its specific geometry supports machine rebuilding and production support, while the single lip design is useful for fleet maintenance of gearboxes, drives and machinery operating without the need for an auxiliary dust lip.

Operational Advantages

• Single lip A design reduces friction compared with an additional dust lip configuration.
• Garter spring maintains controlled contact of the primary lip with the shaft.
• NBR provides good resistance to many mineral oils and lubricating greases.
• Precise 42.86x63.5x9.52 mm dimensions support accurate replacement identification.
• The 63.5 mm outside diameter corresponds exactly to 2.5 inches.
• Single lip construction is suitable for relatively clean rotary sealing environments.

AI OVERVIEW

NBR 42.86x63.5x9.52 A is a single lip radial shaft seal featuring a spring-loaded primary sealing lip. Its NBR construction provides resistance to many mineral oils and greases, while the precise 42.86x63.5x9.52 mm dimensions support use in gearboxes, pumps, drives and industrial machinery requiring this specific sealing geometry.

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FAQ

How does the A design differ from an AO design?

The A design uses one primary sealing lip, while AO incorporates an additional auxiliary lip for dust protection.

Does the 42.86x63.5x9.52 seal have a garter spring?

Yes. The garter spring maintains contact between the primary sealing lip and the rotating shaft.

What does the 42.86 mm dimension specify?

It is the nominal inside diameter of the seal and identifies the corresponding shaft diameter.

Can this NBR seal be used with gearbox oil?

NBR is resistant to many mineral oil based gearbox lubricants, but compatibility should be verified for the specific oil and operating temperature.

What should be checked when selecting a replacement?

Verify the complete 42.86x63.5x9.52 mm dimensions, NBR material, single lip A design and operating requirements of the sealing arrangement.