Seagull Single Lip Oil Seal 3/8 x 1-1/8 x 1/4" (375-1125-250SC)

Seagull imperial single lip oil seals, 1/4 in wide, in 8 sizes. Shaft diameters run from 3/8 to 1-3/16 in and housing bores from 1-1/8 to 2-1/8 in, and each size is a rotary shaft seal in Nitrile Rubber (NBR).

Each size carries a model code that gives the shaft diameter, housing bore and width in thousandths of an inch, followed by the type: for example 1000-2062-250SC is a 1 in shaft, 2-1/16 in housing bore and 1/4 in wide seal, type SC.

Where this product is used

• Gearboxes, speed reducers and differentials, sealing input and output shafts
• Electric motors, pumps, compressors and fans where a rotating shaft leaves a housing
• Wheel hubs, axles and drive shafts on vehicles, trailers and agricultural machinery
• Hydraulic pumps and motors, conveyor and idler drives, and general workshop repairs

Features

• Single lip (SC): a simple, compact lip seal for clean, lightly contaminated shafts
• Nitrile rubber (NBR) lip that suits mineral oils and greases in general machinery
• Every size has a model code that spells out the shaft, bore and width, so it can be matched to the marking on the old seal
• Seagull seals from AIMS Industrial, Sydney, with Australia-wide delivery

Key specifications

Available sizes

Model codes are the Seagull size codes; the SKU is the AIMS part number.

Selecting the right option

Choose the size from the options list. The first number is the shaft diameter and the second is the housing bore, both in inches. Width is 1/4 in for every size on this page.

Match the shaft diameter, the housing bore and the width. Go by the shaft and bore rather than the lip of the old seal, as the lip sits slightly smaller than the shaft it seals on. Width is usually the least critical of the three, provided the housing has the depth.

Type TC is the double lip version, with a second lip on the outer side that helps keep dust and dirt off the main lip; type SC is single lip, suited to cleaner conditions.

NBR suits mineral oils and greases in general machinery. If the seal runs hot or meets aggressive fluids, look at the Viton version of the same size range.

For a size not shown, request a quote with the shaft diameter, housing bore and width.

Fitting and use

Fit the seal with the main lip facing the fluid you are keeping in, press it in square using a tool that bears on the outer face of the seal, and avoid hammering directly on the seal.

Lubricate the lip with the system oil or grease before assembly, and cover keyways, splines, threads or sharp shoulders with a sleeve or tape so they cannot cut the lip as it passes over.

Run the seal on a clean, smooth shaft with a lead-in chamfer and no burrs. A shaft finished to ISO h11 is the usual guide for rotary shaft seals.

Related products

Other Seagull imperial oil seals: Seagull Oil Seal Double Lip Imperial - Width 1/4", Seagull Oil Seal Imperial (Double and Single Lip) - Width 3/8", Seagull Oil Seal Single Lip Imperial - Width 3/8", Seagull Oil Seal Single Lip Imperial - Width 1/2" and Seagull Oil Seal Double Lip Imperial - Width 1/2". See also the full range in Oil Seals & O-Rings.