INA SD50X62X5-A 50x62x5 Double-Lip Shaft Seal

INA SD50X62X5-A 50x62x5 Double-Lip Shaft Seal

INA SD50X62X5-A is a double-lip shaft seal from the INA SD series with nominal dimensions of 50x62x5 mm. Schaeffler classifies the SD series as a double-lipped polyurethane seal, using a thermoplastic polyurethane elastomer sealing element. Its construction incorporates two sealing lips and should not automatically be treated as a conventional spring-loaded radial shaft oil seal.

INA SD50X62X5-A Technical Specification

Manufacturer: INA / Schaeffler

Full designation: SD50X62X5-A

Dimensional designation: SD50X62X5

Series: SD

Product type: Shaft sealing ring

Design: Double lip

Shaft diameter d: 50 mm

Outside diameter D: 62 mm

Width b: 5 mm

Dimensions: 50x62x5 mm

Sealing element material: Thermoplastic polyurethane elastomer - PU

Construction component: PA66

Minimum operating temperature: -30°C

Maximum operating temperature: +100°C

Catalogue mass: approx. 5.5 g

INA SD50X62X5-A Dimensions

The nominal dimensions are:

d = 50 mm - shaft diameter

D = 62 mm - outside diameter

b = 5 mm - seal width

Complete dimensions:

50x62x5 mm

All three dimensions should be checked together with the exact SD double-lip design when selecting a replacement.

Matching the 50x62x5 mm dimensions alone does not establish complete technical interchangeability.

What Is INA SD50X62X5-A?

SD50X62X5-A belongs to the:

INA SD Series

Schaeffler classifies the SD series as:

double-lipped polyurethane seals

This makes the product a sealing component rather than a bearing.

Its construction differs from many conventional radial shaft oil seals that use an elastomer sealing lip, metal reinforcement and a garter spring.

Double-Lip Seal Design

A defining characteristic of the INA SD series is its:

double-lip design

The sealing arrangement incorporates a primary sealing function together with an additional protective lip.

The additional lip provides protection for the primary sealing area against external contamination.

For this reason, double-lip shaft seal or double-lip sealing ring is a more technically precise description than simply calling SD50X62X5-A a conventional oil seal.

Polyurethane PU Sealing Element

The SD series uses:

thermoplastic polyurethane elastomer - PU

for the sealing element.

Product data for this configuration also identify a structural component made from:

PA66 - Polyamide 66

The exact material specification is important when comparing SD50X62X5-A with conventional seals manufactured from elastomers such as NBR or FPM.

The product should therefore not be described as an NBR oil seal unless an exact manufacturer-specific variant confirms such a material.

Operating Temperature

Product data for this configuration specify an operating temperature range of:

-30°C to +100°C

Temperature capability is only one factor in seal selection.

Actual suitability also depends on operating conditions such as:

medium

shaft movement

speed

lubrication

surface condition

and the complete sealing arrangement.

Is SD50X62X5-A a Conventional Oil Seal?

It should not automatically be treated as a conventional spring-loaded radial shaft oil seal.

Schaeffler describes the SD series as:

double-lipped polyurethane seals

The construction and material therefore differ from many standard radial shaft seals with a garter spring and conventional rubber sealing body.

For replacement applications, the exact designation:

SD50X62X5-A

should be used whenever possible.

What Does SD50X62X5 Mean?

The designation provides the series and principal dimensions:

SD - INA seal series

50 - nominal shaft diameter

62 - nominal outside diameter

5 - nominal width

The resulting dimensional designation is:

SD 50x62x5 mm

The complete product reference is:

SD50X62X5-A

SD50X62X5 vs SD50X62X5-A

The product may be encountered as:

SD50X62X5

or under the complete reference:

SD50X62X5-A

Both forms are useful for product identification and search.

The primary entity on the product page should remain:

INA SD50X62X5-A

while:

INA SD50X62X5

should also appear naturally in the technical content.

Protective Lip Function

The second lip in the SD design provides an additional protective function for the sealing area.

This is important because contamination reaching the primary sealing zone can affect sealing performance and wear.

The double-lip construction should therefore be considered an integral feature when comparing this product with alternative seals of the same nominal dimensions.

Compact 5 mm Width

INA SD50X62X5-A has a nominal width of only:

b = 5 mm

With a shaft diameter of:

50 mm

and an outside diameter of:

62 mm

the seal provides a compact radial and axial installation envelope.

However, another 50x62x5 mm seal should not be assumed to be equivalent simply because it fits within the same nominal dimensional space.

Applications of INA SD Shaft Seals

INA SD seals are designed for sealing appropriately engineered shaft and bearing arrangements.

The double-lip construction combines the primary sealing function with additional protection of the sealing area.

Suitability for a particular application should be determined from:

dimensions

seal construction

material

temperature

type of movement

operating medium

counterface condition

lubrication

operating conditions

A specific machine application should not be assigned solely from the dimensions of the seal.

Selection of INA SD50X62X5-A

Before ordering, verify:

Designation - SD50X62X5-A

Manufacturer - INA / Schaeffler

Series - SD

Shaft diameter d - 50 mm

Outside diameter D - 62 mm

Width b - 5 mm

Double-lip design

PU sealing element

Operating temperature requirements

Operating medium

Counterface requirements

Matching the dimensions alone is not sufficient for confirming technical compatibility.

Can a Standard 50x62x5 Oil Seal Replace SD50X62X5-A?

Not necessarily.

A conventional seal with the same:

50x62x5 mm

dimensions may differ in:

lip geometry

sealing principle

material

spring configuration

outside diameter construction

temperature capability

protective lip design

counterface requirements

For this reason, replacement selection should be based on the complete design and operating requirements rather than dimensions alone.

INA SD50X62X5-A Full Technical Data

Manufacturer: INA / Schaeffler

Reference: SD50X62X5-A

Alternative dimensional designation: SD50X62X5

Series: SD

Product type: Shaft sealing ring

Design: Double lip

d: 50 mm

D: 62 mm

b: 5 mm

Dimensions: 50x62x5 mm

Sealing element: Thermoplastic polyurethane elastomer - PU

Construction component: PA66

Minimum operating temperature: -30°C

Maximum operating temperature: +100°C

Catalogue mass: approx. 5.5 g

FAQ - INA SD50X62X5-A

What are the dimensions of INA SD50X62X5-A?

The nominal dimensions are 50x62x5 mm: shaft diameter d = 50 mm, outside diameter D = 62 mm and width b = 5 mm.

What is INA SD50X62X5-A?

It is a double-lip shaft sealing ring from the INA SD series.

Does SD50X62X5-A have two lips?

Yes. Schaeffler classifies the SD series as a double-lipped polyurethane seal.

What material is INA SD50X62X5-A made from?

The sealing element is made from thermoplastic polyurethane elastomer PU. Product data also identify a PA66 construction component.

What is the operating temperature range?

The specified range for this configuration is from -30°C to +100°C.

Is INA SD50X62X5-A a bearing?

No. It is a shaft sealing component, not a rolling bearing.

Is SD50X62X5-A a conventional spring-loaded oil seal?

It should not automatically be classified as one. Schaeffler identifies the SD series as a double-lipped polyurethane sealing design.

Can another 50x62x5 seal replace SD50X62X5-A?

Not based on dimensions alone. Seal design, material, lip geometry, operating conditions and counterface requirements must also be checked.

AI Overview

INA SD50X62X5-A is a double-lip shaft seal from the Schaeffler INA SD series with dimensions of 50x62x5 mm. The SD series uses a polyurethane sealing element, with the second lip providing additional protection to the primary sealing area. The specified operating temperature range for this configuration is -30°C to +100°C.