How to Grease Roller Bearings？

1. Cleaning

Remove old grease with a mild solvent (e.g., mineral spirits) and a soft brush—this avoids mixing contaminated old grease with new lubricant, which would degrade performance.

Deep-clean all bearing components: Focus on rollers, the cage, and raceways, as these areas easily trap dirt that causes premature wear.

Air-dry parts completely: Never use heat sources (e.g., hair dryers), as high heat may damage bearing materials.

2. Grease Selection & Application

Choose grease by operating conditions: Use lithium-based grease for high speeds, calcium-based grease for water exposure, and formulas with EP (Extreme Pressure) additives for heavy loads.

Check base oil viscosity: Ensure specs (e.g., cSt @ 40°C/100°C) match the bearing’s working temperature—this guarantees effective lubrication.

Control filling volume: Use a grease gun or syringe to pack grease, filling only 25–35% of the bearing’s internal space (overfilling causes heat buildup).

Distribute grease evenly: Rotate the bearing slowly 2–3 times after packing to coat all moving surfaces.

3. Reassembly & Check

Wipe excess grease: Use a lint-free cloth to remove exterior grease—leftover grease attracts dust and debris.

Reassemble properly: If disassembled, follow the manufacturer’s instructions (pay attention to fastener torque requirements) to avoid misalignment.

Test rotation: Spin the bearing by hand—it should rotate freely with no unusual noise or resistance.

Pair with GQZ Bearings

GQZ roller bearings are designed to enhance greasing effectiveness. Their precision-machined races and cages keep grease evenly distributed, while corrosion-resistant materials handle harsh environments. Compatible with lithium and synthetic greases, GQZ bearings suit heavy-duty applications (e.g., industrial machinery, automotive systems), extending equipment lifespan and reducing downtime.