Precision Grinding of rollers and bearings in Aerospace: Flexibility for a High-Mix, Low-Volume Market

The aerospace industry is undergoing significant changes with more demanding market requirements.

Aerospace manufacturers and suppliers are required to:

Support multiple bearing geometries across platforms and programs
Produce small batch sizes, prototypes, and spares efficiently
Adapt quickly to design changes and new specifications
Maintain full compliance with aerospace quality and traceability standards

This high mix/low volume environment exposes the limitations of rigid grinding processes and equipment designed for a single part family.

Rollers and bearing components are critical components and their performance directly affects reliability, safety, and service-life. These components operate under extreme conditions—including high rotational speeds, cyclic loading, wide temperature ranges, and strict contamination limits—leaving no margin for dimensional deviation or surface defects. As a result, grinding operations must consistently achieve:

Ultra precise accuracy
Outstanding geometry and surface finish
Optimized residual stress control for durability
Reliable, repeatable quality every time

When part geometries, sizes, and materials change frequently, traditional setups result in long changeover times, increased scrap risk, and underutilized capacity. In addition, conventional multi‑step production processes can take several weeks to complete, causing delays across the entire manufacturing workflow.

Flexibility as a Competitive Advantage at JUNKER

At JUNKER, flexibility is not an option—it is a competitive advantage designed into every solution we deliver. Our grinding technology is engineered to adapt quickly to changing production requirements, shorter batch sizes, and the highest precision demands.

Modular and Multi Purpose Grinding Machines

With modular tooling, workshop-oriented programmable axes, and fast changeovers, our machines can be quickly reconfigured to accommodate new parts, geometries, or production volumes. This enables manufacturers to respond efficiently to shifting market demands without sacrificing productivity.

Advanced automation solutions

Adaptable loading systems ensure smooth material flow regardless of part variation, while intelligent in process gauging enables real time monitoring and adjustment during the grinding process. The result is consistent quality combined with maximum process reliability.

Shoe grinding process for supperior accuracy

Shoe grinding technology is renowned for its exceptional precision in grinding the outer diameter (OD) and inner diameter (ID) of bearings. Due to its superior accuracy and roundness, it is widely used in the aerospace industry.

Integrated measurement and feedback systems

By combining in process and post process measurement, JUNKER helps ensure even the most demanding aerospace tolerances are met—regardless of batch size. This closed loop approach significantly reduces rework and scrap, particularly during short production runs.

Platform 3 – A Modular Design for Flexibility

By efficiently combining three spindles with shoe grinding, the JUNKER Platform 3 replaces traditional four spindle grinding processes. Designed for both high volume production and small batch manufacturing, the JUNKER Platform delivers the flexibility and precision required for the grinding of roller bearings.

Platform 3

JUPITER - centerless grinding technology

JUNKER centerless grinding machines are engineered to meet the stringent quality and precision standards of the aerospace industry. Designed for external cylindrical grinding—including throughfeed, plunge cut, and angular plunge cut operations—these machines ensure exceptional roundness, surface integrity, and dimensional accuracy for aerospace roller bearing components. Depending on application requirements, high performance abrasives such as corundum, CBN, or diamond are used to achieve consistent results on demanding materials. JUNKER technology is ideally suited for grinding critical roller bearing elements.