SS 51110 NAF 50x70x14 mm - Stainless Steel Single Direction Thrust Ball Bearing

Technical Specifications - SS 51110 NAF

The nominal dimensions correspond to the standard 51110 thrust ball bearing size.

However, the exact stainless steel grade, cage material, dynamic and static load ratings, permissible speeds and mass have not been independently confirmed for the specific NAF SS 51110 version.

These specifications are therefore omitted rather than transferred from bearings manufactured by other companies.

What Does SS 51110 NAF Mean?

NAF - Bearing Brand

NAF is the brand associated with this bearing designation.

It should not automatically be identified with manufacturers such as SKF, NSK, NTN or FAG, even though these companies offer thrust ball bearings with the same nominal 51110 dimensions.

Manufacturer-specific materials, internal components and performance ratings may differ.

SS - Stainless Steel Construction

The SS designation is commonly used in bearing identification to indicate stainless steel construction.

For SS 51110 NAF, it identifies the stainless steel version of the bearing.

However, SS alone does not establish the exact stainless steel grade.

It does not confirm whether the bearing is manufactured from AISI 440C, AISI 304 or another stainless steel alloy.

The designation also does not establish resistance to specific chemicals, cleaning agents or corrosive environments.

511 - Single Direction Thrust Ball Bearing Series

The 511 series comprises single direction thrust ball bearings.

These bearings are designed to accommodate axial forces acting parallel to the shaft axis.

Unlike deep groove ball bearings, thrust ball bearings of this construction are not intended to carry radial loads.

The bearing supports axial loading in one direction only.

10 - Bearing Size

The final digits 10 identify the bearing size within the 511 series.

For designation 51110, the nominal dimensions are:

• Bore diameter: 50 mm.

• Outside diameter: 70 mm.

• Overall height: 14 mm.

These dimensions are essential when selecting a replacement bearing.

Construction and Operating Principle

Shaft Washer

The shaft washer is the bearing component designed to locate on the rotating shaft.

It transfers the applied axial force to the ball and cage assembly.

Its raceway geometry provides the rolling contact surface for the balls.

Housing Washer

The housing washer provides the supporting surface within the bearing housing.

It transfers axial forces from the rolling elements into the surrounding machine structure.

In a conventional 511 series thrust ball bearing, the shaft and housing washers have different bore tolerances and may have different actual bore dimensions.

Their positions must therefore be identified correctly during assembly.

Balls and Cage Assembly

The rolling elements are balls arranged between the two thrust washers.

A cage maintains the required spacing between the balls and prevents direct contact between adjacent rolling elements.

During rotation, the balls roll along the raceways, reducing friction between the relatively rotating components.

The exact cage material used in NAF SS 51110 requires confirmation from the product manufacturer's documentation.

Separable Construction

The bearing has a separable design consisting of three main components:

• Shaft washer.

• Housing washer.

• Ball and cage assembly.

This construction allows the components to be installed separately.

Correct assembly orientation is essential for proper load transmission and bearing operation.

Open Bearing Design

SS 51110 NAF is an open thrust ball bearing without integral contact seals or metal shields.

Lubrication and protection against contamination must be provided by the surrounding machine assembly.

Axial Load Capacity and Operating Limitations

The primary function of SS 51110 NAF is to accommodate axial loads acting in one direction.

Axial forces act parallel to the shaft axis and are transmitted through the balls between the shaft washer and housing washer.

The bearing is not designed to accommodate radial loads.

It also cannot independently locate a shaft axially in both directions.

Where combined radial and axial loads are present, an appropriately designed additional bearing arrangement is required.

Proper alignment of the supporting surfaces is important because misalignment may cause uneven load distribution across the rolling elements.

The dynamic and static load ratings of the exact NAF stainless steel version must be confirmed before carrying out bearing life calculations.

Load ratings published for standard chrome steel 51110 bearings should not automatically be applied to SS 51110 NAF.

SS 51110 NAF vs Other Bearing Variants

SS 51110 vs Standard 51110

The main distinction is the material designation.

SS identifies stainless steel construction, whereas standard 51110 thrust ball bearings are commonly manufactured from chrome bearing steel.

Both versions may share the nominal dimensions 50x70x14 mm.

However, identical dimensions do not guarantee identical load ratings, corrosion resistance or operating limits.

The specific material and performance characteristics must be checked before substitution.

SS 51110 vs 51210

The 51210 bearing has a larger outside diameter and greater overall height.

It is therefore not a direct dimensional replacement for SS 51110.

SS 51110 vs Double Direction Thrust Ball Bearings

A single direction 51110 bearing supports axial loading in one direction.

Double direction thrust ball bearings have a different construction that allows axial forces to be accommodated in both directions.

These bearing types are not directly interchangeable without evaluating the complete shaft support arrangement.

Alternative Designations and Reference Numbers

The product may appear under the following notation variants:

• SS 51110 NAF

• NAF SS 51110

• SS51110 NAF

• NAF SS51110

• SS 51110 50x70x14

• 51110 SS NAF

The designation 51110 is also used by other bearing manufacturers.

However, matching nominal dimensions do not automatically confirm equivalent materials, load ratings or complete interchangeability.

No unverified OEM or cross-reference numbers are assigned to this product.

Bearing Selection and Interchangeability

Before purchasing SS 51110 NAF, verify:

1. Complete designation SS 51110.

2. NAF brand identification.

3. Bore diameter of 50 mm.

4. Outside diameter of 70 mm.

5. Overall height of 14 mm.

6. Single direction thrust bearing construction.

7. Required stainless steel grade.

8. Applied axial loading.

9. Operating speed.

10. Lubrication requirements.

11. Operating temperature.

12. Environmental conditions and potential exposure to corrosive substances.

Identical dimensions of 50x70x14 mm do not guarantee complete bearing interchangeability.

Material composition, load ratings and permissible operating conditions may differ between manufacturers and product versions.

For applications requiring defined corrosion resistance, the exact stainless steel grade should be confirmed before installation.

Applications of SS 51110 NAF

Single direction thrust ball bearings are used in rotating assemblies where axial forces must be supported with relatively low rolling friction.

Typical applications for this bearing design include:

• Axially loaded screw mechanisms.

• Rotating shafts subjected to one-direction axial forces.

• Mechanical adjustment mechanisms.

• Selected industrial drive assemblies.

• Rotating components requiring axial support.

Stainless steel versions may be considered for environments where corrosion resistance is an important selection factor.

However, suitability depends on the specific stainless steel grade, lubrication system, operating temperature and environmental exposure.

These examples describe typical applications of single direction thrust ball bearings and do not represent confirmed equipment-specific applications of the exact NAF SS 51110 designation.

Installation and Operating Recommendations

Preparation Before Installation

Clean the shaft, housing and supporting surfaces before mounting.

Inspect the bearing components for contamination, corrosion or mechanical damage.

Ensure that the raceways and rolling elements remain clean throughout the installation process.

Correct Washer Orientation

Install the shaft washer on the shaft and the housing washer in the corresponding housing seat.

The washers must not be interchanged.

The bearing components should be assembled in the correct sequence to ensure proper axial load transmission.

Mounting Forces

Apply installation forces to the appropriate bearing components.

Do not transmit mounting forces through the balls.

Avoid impacts that could damage the raceways or deform the cage.

Alignment

Correct alignment of the shaft and housing is essential.

Excessive misalignment may result in uneven contact stresses, increased friction and premature bearing wear.

Lubrication

The bearing requires lubrication suitable for the applied axial load, operating speed and temperature.

The lubricant should be compatible with the bearing materials and surrounding machine components.

The exact factory lubrication condition of NAF SS 51110 has not been confirmed.

Storage

Store the bearing in a clean, dry environment, preferably in its original packaging.

Protect the components from moisture, dust and mechanical damage.

Although stainless steel offers corrosion resistance, it is not completely immune to corrosion under all conditions.

FAQ - SS 51110 NAF

1. What are the dimensions of SS 51110 NAF?

The bearing has a bore diameter of 50 mm, an outside diameter of 70 mm and an overall height of 14 mm.

2. What does SS mean in SS 51110?

SS indicates stainless steel construction. The exact stainless steel grade used by NAF must be confirmed from the manufacturer's product documentation.

3. What type of bearing is 51110?

51110 is a single direction thrust ball bearing designed to accommodate axial loads acting in one direction.

4. Can SS 51110 NAF carry radial loads?

No. This bearing design is not intended to support radial loads. A separate radial bearing arrangement is required where radial forces are present.

5. Can SS 51110 replace a standard 51110 bearing?

Not automatically. Material, load ratings, lubrication requirements and operating conditions must be compared before substitution.

6. Is SS 51110 a separable bearing?

Yes. The conventional 511 series construction consists of a shaft washer, housing washer and ball and cage assembly.

7. Does stainless steel mean the bearing is completely corrosion-proof?

No. Corrosion resistance depends on the stainless steel grade, environmental conditions, temperature and exposure to chemicals.

8. Is SS 51110 NAF factory lubricated?

The exact factory lubrication condition has not been confirmed. Lubrication requirements should be checked before installation, and the bearing must be supplied with an appropriate lubricant during operation.

SS 51110 NAF - Key Technical Information

SS 51110 NAF is a stainless steel single direction thrust ball bearing measuring 50x70x14 mm. The 511 series identifies a bearing designed for axial loads in one direction, while SS indicates stainless steel construction. Its separable assembly consists of two thrust washers and a ball and cage unit. The bearing is not designed to accommodate radial loads.

The SS 51110 NAF 50x70x14 mm bearing is offered by simmering.pl, a specialist supplier of rolling bearings, industrial seals and mechanical components.

TG Ersatzteile Polska Sp. z o.o. operates a warehouse in Lublin, Poland, serving industrial companies, maintenance departments, workshops and international B2B customers.

Products are shipped from stock in Poland, with shipping options available throughout Europe and worldwide.