---
title: "open type bearing"
date: 2026-06-22
description: "Improper lubrication accounts for 70% of premature ball bearing failures. This guide outlines precise steps to select grease, control quantity, and apply lubric..."
source: https://en.mshjzc.com/blog/56098.html
---

# open type bearing

Improper lubrication accounts for 70% of premature ball bearing failures. This guide outlines precise steps to select grease, control quantity, and apply lubricant to extend bearing lifespan.

## 1. Common Lubrication Mistakes

Many engineers use incompatible grease types. For example, lithium-based grease fails at temperatures above 120°C, leading to bearing wear. Over-lubrication, exceeding 30% of the bearing’s internal space, causes heat buildup and grease oxidation. Under-lubrication creates friction that damages raceways and rolling elements.

## 2. Correct Grease Selection for Ball Bearings

Match grease to operating conditions. For continuous operation at 100–150°C, use polyurea-based grease like MS Bearings LGMT 3, which maintains stability under high temperatures. For low-speed (≤500 RPM) heavy loads, choose extreme-pressure (EP) lithium grease. For high-speed (≥3000 RPM) applications, use low-viscosity synthetic grease to reduce drag.

## 3. Optimal Grease Quantity & Application Method

Apply grease at 20–30% of the bearing’s internal cavity volume. For a 6205-series ball bearing, this equals 0.8–1.2 grams. Use a manual grease gun for small bearings or automatic lubricators for continuous operation. Avoid contaminating grease with dust or moisture during application; clean bearing surfaces before re-lubrication.

What is the typical re-greasing interval for a 6205 ball bearing at 800 RPM?

A 6205 ball bearing operating at 800 RPM under normal load requires re-greasing every 1,500–2,000 hours.

Can I mix different types of bearing grease?

Mixing grease types is not recommended, as it can reduce lubricant performance and cause bearing failure.

For project-specific requirements, consult your bearing supplier. Contact MS Bearings for free technical support.