Crossed Roller Bearing Clearance Selection Guide: CC0 / C0 / C1 Application Analysis

Crossed Roller Bearing Clearance Selection Guide: CC0 / C0 / C1 Application Analysis

Many precision equipment problems such as positioning deviation, backlash, rotation sticking, overheating and short service life are usually not caused by bearing quality, but by incorrect clearance selection.

The clearance standard for crossed roller bearings is different from ordinary bearings. It is one of the most critical parameters that directly determine equipment rigidity, positioning accuracy, rotation smoothness and service life.

We will explain the three mainstream clearance classes: CC0 preloaded zero clearance, C0 standard clearance, and C1 large clearance.

1. CC0 — Preloaded Zero Backlash (Negative Clearance)

CC0 bearings are slightly preloaded with zero internal clearance. The rollers and raceways fit completely without any empty play during rotation.

Best applications:

- CNC rotary tables, 4-axis / 5-axis machine centers

- Hollow rotary platforms, precision indexing tables

- Robot joints and precision testing equipment

- Automation machines requiring zero backlash and high repeat positioning accuracy

Features: Highest rigidity, no return error, stable precision, perfect for high-precision machining.

2. C0 — Standard Clearance

C0 is the normal factory standard clearance, balancing rigidity and smooth rotation. It is the most universal grade for general industrial applications.

Best applications:

- General automation rotary mechanisms

- Ordinary rotary worktables and light-duty rotating structures

- Equipment with medium precision requirements

Features: High compatibility, easy installation, smooth rotation, stable performance and cost-effective.

3. C1 — Large Positive Clearance

C1 enlarged clearance is specially designed for thermal expansion, tight fitting and harsh working environments.

Best applications:

- High-speed rotating structures with obvious temperature rise

- Installation with heavy interference fit

- High-temperature, dusty and heavy-load working conditions

Features: Reserve enough expansion space to avoid jamming, overheating and bearing damage, greatly improving service life under severe conditions.

Quick Selection Rule

- High precision & zero backlash required → CC0

- Normal general-purpose equipment → C0

- High temperature, high speed and tight assembly → C1

All three clearance grades are produced and strictly sorted under standardized production processes in our factory. With dual independent production lines and complete testing equipment, we maintain stable clearance tolerance, consistent preload torque and batch uniformity for both sample orders and mass bulk orders.

If you need professional grade selection according to your mechanical structure, welcome to contact us for technical support.