3" G100 AISI 52100 Chrome Steel Bearing Ball – 1 Piece

Introduction

The PGN Bearings 3" G100 chrome steel ball is a solid, large-diameter component designed for industrial devices that use a spherical surface as a contact, support, guiding, or movement point. With a nominal diameter of 76.2 mm, it provides broad geometry for custom mechanical projects where conventional small balls are not suitable.

Manufactured from AISI 52100 chrome steel, this ball provides the high hardness and good wear resistance associated with the material. Its G100 grade and smooth surface support use in compatible assemblies requiring consistent contact, repeatable positioning, or controlled movement without implying a specific load capacity.

The one-piece package is suitable for replacements, prototypes, special-purpose equipment, and low-volume assemblies. Because the listed nominal weight is 64.148 oz, or approximately 1.818 kg, the design should include suitable retention and safe handling procedures during installation and maintenance.

Hero Product Snippet

Solid 3" (76.2 mm) AISI 52100 chrome steel ball with G100 precision and a smooth surface finish, supplied as one piece for mechanical interfaces and custom industrial devices.

Recommended Applications

• Spherical interfaces in industrial devices
• Specially sized support or transfer mechanisms
• Mechanical guides and positioning systems
• Material-movement equipment with spherical contact points
• Custom holding and assembly fixtures
• Large-scale functional prototypes
• Compatible retention or closing mechanisms
• Replacement in assemblies specified for a 3" G100 ball

76.2 mm Diameter for Mechanical Interfaces

At three inches in diameter, this ball provides broad spherical geometry for contact with compatible seats, guides, tracks, and supports. Its size may be useful in devices where the ball acts as an interface between moving components or support surfaces.

Install the ball only in assemblies designed for its diameter, weight, and precision grade. Clearances, retention, adjacent surface materials, and movement conditions should be evaluated by the person responsible for the design.

G100 Precision for Compatible Industrial Applications

G100 identifies the precision grade listed for this product. The classification allows the ball to be compared with the geometric requirements of the equipment and distinguished from alternatives manufactured to finer or broader grades.

G100 may be appropriate for various moderate-motion industrial mechanisms and custom devices when it matches the original specification. The grade alone does not guarantee compatibility with every bearing or mechanical assembly.

AISI 52100 Chrome Steel

AISI 52100 is a chrome steel widely used for mechanical components because of its high hardness and good wear resistance. These properties can help preserve the surface when the ball operates under suitable contact and lubrication conditions.

Material selection must also account for the operating environment. Despite its mechanical properties, chrome steel does not provide the same corrosion resistance as stainless steel and requires appropriate protection from moisture.

Smooth Surface for Controlled Contact

PGN describes its chrome steel balls as having a smooth surface without defects such as flats, pits, soft spots, or cuts. A uniform finish supports more regular contact with the other elements of a properly sized mechanism.

Protect the surface condition during transportation, installation, and maintenance. Drops, impacts, and exposure to abrasive particles may leave marks and interfere with finish-sensitive applications.

Substantial Mass for Large-Scale Devices

The ball has a listed nominal weight of 64.148 oz, approximately 1.818 kg. This mass is relevant in positioning, support, and movement mechanisms because it affects handling, dynamic response, and the system needed to keep the component contained.

When weight is part of the project’s function, verify the actual mass of the individual ball. The product should not be treated as a calibrated weight or measurement standard without specific certification.

Single-Piece Package and Storage

SKU SB-3IN-CHROME-G100/1 corresponds to a package containing one ball. The individual package is convenient for component replacement, dimensional evaluation, and equipment development requiring only a limited quantity.

Store the ball in a clean, dry location protected from corrosive substances. When appropriate, a compatible protective film can help preserve the chrome steel during periods of inactivity.

Key Features

• 3" (76.2 mm) nominal diameter
• AISI 52100 chrome steel construction
• G100 precision grade
• Solid, large-diameter design
• Smooth surface finish
• Good material-related wear resistance
• Nominal weight of 64.148 oz, approximately 1.818 kg
• Supplied as one piece
• Intended for dimensionally compatible mechanical interfaces
• SKU: SB-3IN-CHROME-G100/1

FAQ

What is the diameter of this chrome steel ball?

The nominal diameter is three inches, equivalent to 76.2 mm.

How many balls are included?

SKU SB-3IN-CHROME-G100/1 corresponds to a package containing one ball.

How much does the 3" ball weigh?

The listed nominal weight is 64.148 oz, equivalent to approximately 1.818 kg. Confirm the actual unit weight for projects that depend on an exact mass.

What does G100 mean?

G100 is the precision grade listed for the ball. Compare it with the geometric and dimensional requirements of the equipment before installation.

Can this ball be used in a conventional bearing?

Only when the bearing or assembly is specifically designed for a 3" chrome steel ball with G100 precision. Compatibility should not be assumed based only on the spherical shape.

How should the ball be protected from corrosion?

Keep the ball clean, dry, and protected from moisture. When compatible with the application, use an appropriate temporary protective product during storage.