Lubrication
The Screw Nut is not lubricated when delivered. Once the bearing has been mounted, the Screw Nut must be treated with an appropriate volume of grease or lubricant.
The lubrication method should be determined based on usage conditions.
Lubricating with oil
THK recommends lubricating the Lead Screw Nut with oil. Oil-bath lubrication or drip-feed lubrication are both effective. The most effective method is oil-bath lubrication, which is suitable for highspeed operation, heavy loads, high external temperatures, and other demanding conditions, and helps cools the Lead Screw Nut. Drip-feed lubrication is suitable for low and medium speeds and light and medium loads. Criteria for selecting the appropriate lubricant are shown in Table2 .
| Condition | Types of Lubricants |
|---|---|
| Low speed, high load, high temperature |
High-viscosity sliding surface oil or turbine oil |
| Low speed, light load, low temperature |
Low-viscosity sliding surface oil or turbine oil |
Lubricating with Grease
For usage in lower-speed operations, which is a less common scenario, the user can lubricate the slide system by periodically applying grease to the shaft by hand, or use the oil hole on the Lead Screw Nut. THK recommends using lithium grease no. 2.
