How OEM Bearing Pullers Are Manufactured: Forging, CNC and Heat Treatment Explained

Design & Engineering

The manufacturing process for OEM bearing pullers begins with design and engineering. Engineers define the tool’s specifications including dimensions, load capacity, mechanical structure, and intended load performance. This upfront planning ensures the final product will meet performance expectations and safety requirements for heavy-duty use.

Material Selection

Once design specifications are established, high-strength raw materials are selected based on required mechanical properties. Tool-grade steels or alloy steels are commonly used because they offer superior toughness, wear resistance, and fatigue strength. Choosing the right material sets the foundation for durability in demanding environments.

Forging – Shaping the Core Components

Forging is the next step in production, where heated metal blanks are plastically deformed into approximate shapes of the puller components such as arms and spindles. This process enhances internal grain structure and mechanical strength, ensuring parts can withstand heavy pulling forces. Various forging temperatures may be used depending on the steel and tooling setup.

CNC Machining – Precision Shaping

After forging, rough-shaped blanks are processed through CNC machining. CNC machines precisely cut, drill, mill, and thread each component to match exact design tolerances. Precision machining is critical for ensuring that all parts fit together properly and function smoothly during assembly and use.

Heat Treatment – Strengthening the Tool

Once machined, parts undergo heat treatment processes such as hardening and tempering. These thermal cycles alter the internal structure of the steel to improve hardness, strength, and toughness. Heat treatment helps the tool resist deformation and fracture under heavy loads, extending the life and reliability of the puller.

Surface Finishing & Coating

After heat treatment, additional surface finishing may be applied to protect against corrosion and wear. Common surface treatments include protective coatings, plating, or oxidation layers that enhance durability and ensure the tool can withstand workshop environments.

Assembly & Quality Control

Individual parts are then assembled into the complete bearing puller. During assembly, quality control checks are performed to verify dimensional accuracy, fit, and function. Load testing and functional testing are conducted to ensure the finished tool meets specification and can perform safely under load before it is packaged for shipment.

Summary

The OEM manufacturing process for bearing pullers integrates thoughtful design, robust material selection, forging for strength, precision CNC machining, and controlled heat treatment to create a tool that offers strength, precision, and durability. Together, these stages produce a reliable industrial tool capable of withstanding heavy-duty use in automotive, industrial, and maintenance applications.