But not all applications fall within this temperature range, and each component in the linear bearing assembly (housing, rail, balls, seals, etc.) has a different maximum and minimum operating temperature.

But if you choose the right metal components, plastic components, lubrication, and optional accessories, you can configure a recirculating linear guide that can withstand high (or low) temperature applications that fall outside the standard -10 to 80 C range.

The makeup of these parts can encompass three or more different types of steel, stainless steel, and in some cases aluminum.

One of the reasons for this recommendation is the possibility of temperature fluctuations, which can cause condensation and lead to corrosion.

And although forgoing seals altogether isnt recommended for profiled linear guides (because they help to keep lubrication inside the bearing), round shaft linear guides and cam roller slides can be operated without seals, making them another option for applications that dont call for the load capacity or rigidity of a profiled linear guide.

And since these designs dont require plastic recirculation components, theyre available in all-metal versions that can withstand temperatures outside the range of most plastics.

Specifically, the temperature of a lubricant affects its viscosity (resistance to flow), and grease lubrication that exceeds its rated temperature can separate into its components (base oil, thickener, and additives), reducing its effectiveness.

For example, recirculating linear guides are typically rated for use at temperatures up to 80 C, but external lubrication units often have a maximum temperature rating of 50 to 60 C.

Sensitive components such as measuring systems (integrated linear encoders) and parts that are integral to the recirculation system, such as ball chains or ball separators, should also be checked to ensure they can withstand excessively high or low operating temperatures.

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Hiwin Linear Guide