Bearing buyer question
Can a China Supplier Replace an Obsolete Bearing without a Drawing?
A replacement may be developed from an unworn sample and operating information, but the original specification cannot be assumed from worn dimensions alone. The reconstructed drawing and acceptance criteria must be approved before production.
Information required for a checkable answer
- All visible part numbers and equipment identity
- Unworn sample or multiple samples where possible
- Shaft, housing, shoulders and adjacent components
- Loads, speed, temperature and failure history
- Material or hardness test requirements
- Lubrication and sealing environment
- Critical dimensions, fits and acceptance criteria
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
Can a worn sample be copied exactly?
It should not be copied blindly. Wear, deformation and corrosion must be separated from the intended dimensions and tolerances.
How is material identified?
Agree the required method before quotation, such as composition, hardness or metallographic checks, and define which result controls the replacement specification.
Should the new bearing match the old design?
It should match the approved interfaces and duty. Any proposed change to material, geometry, clearance or lubrication must be documented and approved.