Bearing Ball 2.5 mm G100

Bearing Ball 2.5 mm G100 - Precision Ball

Bearing Ball 2.5 mm G100 is a spherical rolling element with a nominal diameter of 2.5 mm and precision grade G100. The G100 grade defines requirements for dimensional consistency, spherical accuracy and surface roughness. The ball can be used in suitable rolling bearings and precision mechanical assemblies. The material, manufacturer and hardness are not specified by the product designation.

Technical Specifications

The geometric limits shown are associated with grade G100 for steel bearing balls under ISO 3290-1. They do not constitute an individual inspection certificate for the supplied product.

What Does 2.5 mm G100 Mean?

2.5 mm identifies the nominal diameter of the bearing ball.

G100 identifies the precision grade, defining permissible geometric deviations and surface finish requirements.

G100 does not indicate a hardness of 100 HRC, a specific steel grade or the load capacity of the ball.

G100 Precision Grade

For steel bearing balls, grade G100 under ISO 3290-1 specifies:

• Maximum individual ball diameter variation: 2.5 µm.

• Maximum deviation from spherical form: 2.5 µm.

• Maximum surface roughness Ra: 0.10 µm.

• Maximum diameter variation within a lot: 5 µm.

These values do not mean that every ball has a diameter tolerance of 2.5 mm +/- 0.0025 mm.

Geometric precision and deviation of the mean ball diameter from the nominal diameter are separate characteristics.

For precision assemblies, the ball diameter sorting group and actual inspection results may also be important.

G100 Compared with Other Precision Grades

A lower G number indicates more stringent geometric accuracy requirements.

The appropriate grade should be selected according to the mechanical assembly's design requirements.

Construction and Function

A bearing ball is a spherical rolling element that operates between bearing raceways or other appropriately designed contact surfaces.

In a ball bearing, rolling elements transmit loads through their contact areas with the raceways while allowing relative rotational movement.

Important characteristics include:

• Nominal ball diameter.

• Spherical accuracy.

• Surface finish.

• Material and hardness.

• Dimensional consistency within a set.

• Raceway condition.

• Lubrication conditions.

Precision grade G100 defines geometric accuracy but does not independently determine load capacity or service life.

Typical Applications

Bearing balls with a nominal diameter of 2.5 mm may be used in appropriately designed:

• Miniature ball bearings.

• Precision mechanical mechanisms.

• Ball guides and rolling mechanisms.

• Spring-loaded detent assemblies.

• Small mechanical moving assemblies.

These are general applications of bearing balls, not verified equipment-specific applications of this particular product.

Selection and Interchangeability

Before ordering, verify:

1. Nominal diameter - 2.5 mm.

2. Required precision grade - G100.

3. Ball material.

4. Required hardness.

5. Diameter sorting group, where applicable.

6. Loading and lubrication conditions.

7. Bearing or equipment manufacturer's requirements.

Bearing balls with identical nominal diameters are not automatically interchangeable.

They may differ in material, hardness, precision grade and actual diameter within their specified sorting groups.

When replacing rolling elements inside a bearing, follow the bearing manufacturer's requirements for matching and assembling the complete ball set.

Handling and Storage

Store bearing balls in clean conditions and protect them from mechanical damage and contamination.

During handling and installation:

• Avoid contact with abrasive materials.

• Prevent impacts and surface damage.

• Do not mix incompatible diameter sorting groups.

• Do not substitute balls of unknown material where material properties are critical.

• Keep contact surfaces clean.

FAQ

What is the diameter of the G100 bearing ball?

The nominal diameter is 2.5 mm.

What does G100 mean?

G100 is a bearing ball precision grade defining permissible geometric deviations, including diameter variation, spherical form and surface roughness.

Does G100 mean a diameter tolerance of +/- 0.0025 mm?

No. The 2.5 µm value refers to maximum diameter variation within an individual ball, not directly to the tolerance of its mean diameter relative to the nominal size.

Is G100 more precise than G200?

Yes. G100 has stricter geometric accuracy and surface finish requirements than G200.

Is G100 more precise than G40?

No. G40 has stricter precision requirements than G100.

Is a G100 bearing ball made from 100Cr6 steel?

Not necessarily. The precision grade does not specify the material. Steel grade must be verified separately.

Can a single ball be replaced inside a bearing?

Replacing an individual ball requires matching material, dimensions, sorting group and other technical characteristics. Replacing the complete bearing is often more appropriate.

Does G100 specify the load capacity?

No. Load capacity also depends on material properties, contact geometry and operating conditions.

Bearing Ball 2.5 mm G100 - Key Technical Information

Bearing Ball 2.5 mm G100 is a spherical rolling element with a nominal diameter of 2.5 mm. For steel balls, ISO 3290-1 grade G100 specifies a maximum diameter variation of 2.5 µm, spherical form deviation of 2.5 µm and surface roughness Ra of 0.10 µm. Material and hardness require separate verification.

Bearing Balls at simmering.pl

simmering.pl supplies bearing balls, rolling bearings and industrial mechanical components.

Stock in Poland, with a warehouse in Lublin. Technical support and worldwide shipping are available.