Bearing buyer question
How Do I Source a Custom Slewing Ring Bearing from China?
Start with the machine interface and duty cycle. The supplier must calculate or review axial, radial and tilting-moment loads and then confirm gear, mounting, material, heat treatment, sealing, lubrication and inspection requirements.
Information required for a checkable answer
- Maximum and operating axial, radial and moment loads
- Load spectrum, duty cycle and required service life
- Ring diameters, section, mounting holes and bolt grade
- Internal gear, external gear or ungeared design
- Module, tooth count, pressure angle and gear accuracy
- Raceway and gear heat treatment requirements
- Seal, grease, coating, marking and transport packing
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 outside diameter enough to select a slewing ring?
No. Load combinations, bolt circle, ring stiffness, gear data, mounting structure, speed and life determine the design.
Which documents should be approved before production?
Approve the bearing and interface drawing, gear data, material and heat-treatment route, inspection plan and marking or packing requirements.
How should delivery be planned?
Ask for drawing approval, forging or ring blank, machining, heat treatment, grinding, assembly, final inspection and dispatch milestones.