Bearing buyer question
How Do I Specify a High-Temperature Bearing from China?
Specify continuous and peak temperature together with speed, load, atmosphere and lubricant limits. “High temperature” is not a material specification and cannot be quoted safely as one universal grade.
Information required for a checkable answer
- Continuous, peak and start-up temperature
- Speed, load and duty cycle at temperature
- Air, steam, vacuum, food contact or corrosive atmosphere
- Ring and rolling-element material route
- Dimensional stabilization or heat-treatment requirement
- Cage, seal and lubricant temperature capability
- Expansion allowance, clearance and life target
Certificates and order evidence
Do not accept a logo or an undated certificate screenshot as proof. Check the certificate holder, site address, scope, standard, issuer, certificate number and validity. Then request order-specific records for the bearing you are buying.
Available documents are confirmed against the selected supplier, specific product and order. A document is not promised until its holder, scope and availability have been checked.
Lead time and delivery confirmation
A reliable lead time is issued after the drawing revision, material route, quantity, tooling, inspection scope and packing are fixed. Ask for separate dates for drawing approval, material readiness, first article, batch completion and dispatch.
Recommended RFQ package
Send the controlled drawing or model, application conditions, quantity, destination country and the records you require. We will identify missing inputs and reply with the review status before a production commitment.
Use the bearing RFQ checklistFrequently asked questions
Is stainless steel automatically suitable for high temperature?
No. Corrosion resistance, hardness retention, dimensional stability, load capacity and lubricant compatibility must be evaluated separately.
Can standard grease be used?
Only if its base oil, thickener, oxidation life and operating limit suit the actual temperature, speed and atmosphere.
What evidence should be requested?
Request the approved material and lubrication specification, relevant certificates, dimensional inspection and any agreed heat-treatment or functional validation records.