High temperature miniature ball bearings

High-temperature miniature ball bearings are specialized small bearings designed to operate reliably in heat environments where standard bearings fail. Here is a clear overview plus some real product examples.

GMW offers miniature ball bearings as below:

• Flanged miniature bearings in chrome steel
• Stainless Steel Miniature Bearings for high precision
• Stainless steel miniature flange bearings for high precision

High-temperature miniature bearings have the following advantages:

Compared to normal miniature bearings, high-temp versions use:

• Materials: stainless steel (S440C) and chrome steel (SAE52100, Gcr15)

• Lubrication: High temperature grease up to 150°C with base-oil Lithium and up to 200°C with base-oil Polyete perflorua

• Internal clearance: usually CN or C3

• Seals/shields: Steel shields (ZZ) instead of rubber viton

• Tolerances class: Grade P0, P6, P5, P4

These are used in:

• Small motors / fan cooling
• Miniature gearboxes
• 3D printers (heated chambers)
• Aerospace / precision tools
• Etc…

The application-specific product selection criteria include:

• Temperature range: choose at least 20–30% above your operating temperature
• Lubricant type: grease must match temperature.
• Speed ​​versus heat: the higher the speed, the greater the heat.
• Load: Miniature bearings have limited load capacity.
• Works well in cold storage / cryogenic

Please also find product specifications by downloading our PDF catalog for high-temperature miniature ball bearings here: