A properly designed lubrication system is critical to the service life and operational reliability of slewing bearings. This document outlines the core parameters engineers should reference when specifying or maintaining lubrication systems for BRISK SLEWING products.

1. What Grease Selection Standards Should You Follow?
For standard applications, we recommend NLGI Grade 2 lithium-based grease with the following specifications:

Parameter    Standard Value    Remarks
Base Oil Viscosity    100–220 cSt @ 40°C    ISO VG 100–220
Operating Temperature    -30°C ~ +120°C    Continuous duty
Dropping Point    ≥ 180°C    ASTM D2265
Thickener Type    Lithium / Lithium Complex    Standard
EP Additives    Required    Extreme pressure


For gear mesh lubrication, use ISO VG 220–320 heavy-duty extreme pressure (EP) gear oil. Apply via automatic spray or brush-on method during each scheduled maintenance interval.

Grease selection chart for slewing bearings - lubrication guide
2. What Are the Recommended Refilling Intervals & Dosages?
Bearing Size    Interval (Operating Hours)    Dosage per Point
Small (OD < 500 mm)    80–100 h    20–30 g
Medium (OD 500–1000 mm)    60–80 h    30–40 g
Large (OD 1000–2000 mm)    40–60 h    50–80 g
Extra Large (OD > 2000 mm)    30–50 h    80–120 g
3. What Should You Consider for Special Environment Lubrication?
3.1 What Grease Works for High-Temperature / Metallurgical Conditions?
Use polyurea-based high-temperature grease (temperature resistance > 180°C)
Reduce standard fill amount by 15–20% to allow for thermal expansion
Monitor bearing temperature continuously when ambient exceeds 120°C
3.2 How Should You Lubricate in Coastal / Subsea Environments?
Use synthetic grease with anti-corrosion additives
Water washout resistance: < 5% weight loss (ASTM D1264)
Increase re-greasing frequency by 30% to flush out moisture
3.3 What Lubrication Practices Work in Dusty / Mining Conditions?
Lubrication interval reduced to 50% of standard
Weekly compressed air cleaning of raceway dust grooves
Ultrasonic flaw inspection every 3 months minimum
Slewing bearing surface finish quality inspection

 

4. Why Do These Parameters Matter for Your Equipment?
Proper lubrication selection and maintenance scheduling can extend slewing bearing service life by 2–3× compared to unoptimized systems. For customized lubrication recommendations specific to your application, contact our engineering team.