Relubrication Interval Planner

What it is

Grease in a bearing breaks down over time, so it must be topped up on a schedule. The right interval (how often) and quantity (how much) depend on the bearing size and type, speed, temperature, load, contamination and mounting. Bearing and equipment makers publish methods and charts for this. This planner is a worksheet for recording those values for each point and the conditions that adjust them. It does not give intervals itself.

How to use it

1. List every grease point on the asset. Note the bearing number from the nameplate or the parts list.
2. Record the OEM interval and quantity from the equipment manual. If there is none, use the bearing maker's method.
3. Note the operating conditions that call for a shorter interval (see the factors chart).
4. Record the grease product, thickener and NLGI grade.
5. Set the interval, then review it against results: temperature, noise, vibration and grease condition at the seals.

Planner worksheet

Factors that usually shorten the interval

Key points

• Measure your grease gun. Output per stroke varies a lot between guns. Weigh several strokes to find it.
• More is not better. Over-greasing raises bearing temperature and can push seals out. Electric motors are especially sensitive.
• Use the same grease each time, or check compatibility before changing.
• Clean the fitting before greasing and replace damaged fittings.

Common mistakes

• Greasing on a fixed calendar with no regard for conditions.
• Counting strokes without knowing the gun's output.
• Greasing a motor with the drain plug closed when the maker says to open it.

Governing standards: Equipment maker lubrication instructions; bearing maker relubrication methods; electric motor maker lubrication instructions.

Reference only. Verify against the current governing code or standard, the manufacturer's data and the project documents before use. Apps for Distributors disclaims liability arising from reliance on this reference.