2" G25 AISI 52100 Chrome Steel Bearing Ball – 1 Piece

Introduction

The PGN Bearings 2" G25 chrome steel ball offers a practical balance of large diameter, geometric precision, and ease of integration into mechanical projects. With a nominal diameter of 50.8 mm, it can be used in special bearings, valves, support devices, and other mechanisms specifically sized for a solid ball of this diameter.

Manufactured from AISI 52100 chrome steel, the ball provides the high hardness and good wear resistance associated with this material. Its G25 precision grade and smooth surface finish support consistent contact and uniform movement in compatible assemblies, particularly when alignment, lubrication, and clearances are properly defined.

Supplied as one piece, this two-inch ball is convenient for maintenance, prototype development, and equipment that does not require a bulk quantity. Its listed nominal weight of 19.007 oz, equivalent to approximately 538.83 g, should also be considered when designing the support and retention system.

Hero Product Snippet

Solid 2" (50.8 mm) AISI 52100 chrome steel ball with G25 precision and a smooth surface finish, supplied individually for special bearings, valves, and compatible mechanical devices.

Recommended Applications

• Special industrial bearings designed for a 2" ball
• Compatible valves and control mechanisms
• Support and transfer devices
• Mechanical positioning systems
• Guides, tracks, and movement mechanisms
• Specially designed pneumatic equipment
• Engineering prototypes and custom devices
• Replacement in assemblies specified for a 50.8 mm G25 ball

Intermediate Diameter for Industrial Integration

The 2" diameter provides a larger contact surface than conventional industrial balls while remaining easier to integrate than 2-1/2", 3", or 3-1/2" options. This makes it useful for projects requiring a substantial spherical component without the mounting space needed for the largest formats in the product line.

At 50.8 mm, the ball may function as a rolling, support, retention, or mechanical-interface element when the assembly is designed for that purpose. Fit and operating clearances should be verified before installation.

G25 Grade and Geometric Control

G25 identifies the precision class of this ball. Compared with higher numerical grades, this classification represents more refined control of dimensional uniformity and surface finish without determining suitability for a specific application by itself.

In mechanisms sensitive to surface contact, consistent spherical geometry can contribute to more uniform movement. For replacement applications, compare the G25 grade with the original equipment specification.

AISI 52100 Chrome Steel

AISI 52100 is a chrome steel widely used for balls and mechanical components because of its high hardness and good wear resistance. These properties help the material withstand repeated contact in compatible industrial applications.

Performance depends on factors such as load, speed, alignment, lubrication, and the condition of adjacent surfaces. Because the product page does not provide a load rating, evaluate the ball according to the actual requirements of the project.

Smooth Finish for Movement and Contact

The smooth surface supports uniform contact with properly sized tracks, seats, guides, and supports. PGN describes its chrome steel balls as free from surface defects such as flats, pits, soft spots, and cuts.

Avoid impacts, drops, and contact with abrasive materials during handling. Even small marks may interfere with assemblies that depend on uniform rolling, sealing, or repeatable positioning.

Weight and Single-Piece Package

SKU SB-2IN-CHROME-G25/1 corresponds to the one-piece option. This individual package is convenient for specific replacements, prototypes, and special projects without requiring the purchase of multiple balls.

Each ball has a listed nominal weight of 19.007 oz, equivalent to approximately 538.83 g. Although easier to handle than the larger sizes in the line, the component should remain properly contained during installation and operation.

Storage and Surface Care

AISI 52100 chrome steel is not stainless and may oxidize when exposed to moisture. Store the ball in a clean, dry location, preferably in closed packaging protected from corrosive agents.

When compatible with the application, an appropriate protective film can help preserve the surface. Inspect and carefully clean the ball before installation.

Key Features

• 2" (50.8 mm) nominal diameter
• AISI 52100 chrome steel construction
• G25 precision grade
• Smooth surface finish
• High material-related hardness
• Good wear resistance
• Nominal weight of 19.007 oz, approximately 538.83 g
• Supplied as one piece
• Suitable for dimensionally compatible assemblies
• SKU: SB-2IN-CHROME-G25/1

FAQ

What is the diameter of this ball?

The ball has a nominal diameter of two inches, equivalent to 50.8 mm.

How many balls are included?

SKU SB-2IN-CHROME-G25/1 corresponds to a package containing one ball.

How much does the 2" ball weigh?

The listed nominal weight is 19.007 oz, equivalent to approximately 538.83 g.

What does G25 precision mean?

G25 is the precision class listed for the ball. In general, it represents more refined geometric control than higher numerical grades, but it must be compared with the equipment specification.

Can this ball be used in any large bearing?

No. Bearing compatibility depends on the diameter, material, precision grade, and internal geometry of the assembly. Use the ball only in equipment specified for a 2" component.

Can chrome steel rust?

Yes. AISI 52100 offers good wear resistance but does not provide the corrosion resistance of stainless steel. Keep the ball dry and protected from moisture.