Rotary Shaft Seal 125x150x13 NBR TC - Double Lip Oil Seal

Rotary Shaft Seal 125x150x13 NBR TC - Double Lip Oil Seal

Rotary Shaft Seal 125x150x13 NBR TC is a double-lip radial shaft seal with dimensions 125x150x13 mm, manufactured from NBR (Nitrile Butadiene Rubber). The TC design features a spring-loaded primary sealing lip and an additional dust lip that helps protect the sealing area against dust, dirt and other external contaminants.

Technical data

What does 125x150x13 mm mean?

The dimensions specify the nominal installation size of the rotary shaft seal:

125 mm - nominal shaft diameter.

150 mm - nominal housing bore diameter.

13 mm - nominal seal width.

When selecting a replacement, all three dimensions should be checked together with the elastomer material, sealing lip configuration and outside diameter design.

TC - double-lip oil seal design

The TC profile is a double-lip rotary shaft seal design.

Its typical construction includes:

• primary sealing lip

• garter spring supporting the primary sealing lip

• additional dust lip

• rubber-covered outside diameter

• internal metal reinforcement

The primary sealing lip operates directly against the rotating shaft surface and provides the main dynamic sealing function.

The additional secondary lip acts as a dust lip, helping to reduce the ingress of dust, dirt and other external contaminants into the primary sealing area.

NBR - Nitrile Butadiene Rubber

The oil seal is manufactured from NBR (Nitrile Butadiene Rubber).

NBR is one of the most widely used elastomers for conventional rotary shaft seals. It provides good resistance to many mineral oils and greases together with good mechanical and wear properties.

Material suitability should always be evaluated according to the specific medium, operating temperature, shaft surface speed and other operating conditions.

How does a 125x150x13 TC oil seal work?

The primary sealing lip operates directly against the rotating shaft. A garter spring helps maintain appropriate radial contact between the sealing lip and shaft surface.

The secondary dust lip provides an additional barrier against external contamination and helps protect the operating area of the primary sealing lip.

The rubber-covered outside diameter provides static sealing between the outer surface of the oil seal and the housing bore.

SC vs TC oil seal - what is the difference?

The main difference is the number of lips.

SC - single-lip rotary shaft seal with one spring-loaded primary sealing lip and no additional dust lip.

TC - double-lip rotary shaft seal with a spring-loaded primary sealing lip and an additional secondary dust lip.

Therefore, SC and TC seals should not automatically be considered interchangeable even when their nominal dimensions are identical.

Seal designation systems may vary between manufacturers, so the actual construction, dimensions and elastomer material should always be verified when selecting an equivalent.

Selecting a 125x150x13 TC oil seal

Before purchasing or selecting a replacement, verify:

• shaft diameter: 125 mm

• housing bore diameter: 150 mm

• seal width: 13 mm

• elastomer: NBR

• TC design

• double-lip construction

• sealed medium

• operating temperature

• shaft surface speed

• condition of the shaft sealing surface

• lubrication conditions

• required protection against external contamination

Matching the 125x150x13 mm dimensions alone does not guarantee full interchangeability.

Installation

Before installation, thoroughly clean the shaft and housing bore.

The shaft surface in contact with the primary sealing lip should be free from sharp edges, burrs, corrosion, scratches and other defects that could damage the sealing lip or reduce sealing performance.

During installation:

• protect the sealing lip from sharp edges

• prevent the lip from folding or twisting

• press the seal evenly into the housing

• avoid tilting during installation

• ensure the correct installation direction

The primary sealing lip should normally face the medium being retained.

FAQ - Rotary Shaft Seal 125x150x13 NBR TC

What are the dimensions of this oil seal?

The nominal shaft diameter is 125 mm, the housing bore diameter is 150 mm, and the seal width is 13 mm. The complete dimensions are 125x150x13 mm.

What material is the seal made from?

The sealing element is manufactured from NBR (Nitrile Butadiene Rubber).

Is TC a double-lip oil seal?

Yes. The TC design features a primary sealing lip and an additional secondary dust lip.

Does the TC oil seal have a garter spring?

Yes. The primary sealing lip is supported by a garter spring.

What is the purpose of the additional lip?

The additional dust lip helps reduce the ingress of dust, dirt and other external contaminants into the primary sealing area.

What is the difference between SC and TC oil seals?

SC is a single-lip design without an additional dust lip. TC is a double-lip design incorporating an additional secondary dust lip.

Is NBR suitable for oil?

NBR provides good resistance to many mineral oils and greases. Compatibility should always be checked for the specific medium and actual operating conditions.

Can any 125x150x13 oil seal be used as a replacement?

No. In addition to dimensions, the elastomer material, TC profile, lip configuration and actual operating requirements should be verified.

Rotary Shaft Seal 125x150x13 NBR TC - key information

Rotary Shaft Seal 125x150x13 NBR TC is a double-lip oil seal for a 125 mm shaft and 150 mm housing bore, with a width of 13 mm. Manufactured from NBR, the TC design combines a spring-loaded primary sealing lip with an additional dust lip that helps protect the primary sealing area against external contamination.

Available from simmering.pl, a specialist supplier of rotary shaft seals, industrial sealing solutions and bearings. Stock in Poland with worldwide shipping.