Frequently Asked Questions
Technical answers about steel ball materials, precision grades and inspection, plus quotations, samples, minimum orders and delivery.
See our Steel Ball Size & Weight Conversion Chart ↗
Technical and quotation questions
Do the listed diameter and grade ranges mean every combination can be produced?
The figures describe product-family ranges, not confirmation of every material, diameter, grade and treatment combination. The listed carbon steel range is 0.5–50 mm and G100–G1000; the stainless steel range is 0.5–150 mm and G10–G1000. Confirm the specific combination in the quotation. Other chrome steel ball diameters can also be submitted for assessment.
Besides diameter, what should be checked when accepting precision steel balls?
Depending on the project, also specify ball diameter variation, deviation from spherical form, lot diameter consistency and surface roughness. Agree hardness, material and surface condition separately. Acceptance documents should define technical requirements, measurement methods, sampling and lot association. A single diameter reading or a bright appearance does not establish the precision grade.
Does a raw-material inspection report prove that finished balls meet G10 or G5?
No. A raw-material report describes its material heat or lot and the tests recorded in that report. It does not replace dimensional, form and surface inspection of the finished balls. Confirm G10/G5 through inspection documentation for the corresponding finished lot, and check traceability between the material heat, processing lot and delivery lot. Agree the required documents at enquiry stage.
What information is needed for accurate selection and quotation?
Provide the product or material designation, nominal diameter and unit, precision grade or tolerance, quantity and quantity unit, application and destination. Upload drawings or technical documents where available. For material selection, add load, speed, temperature, medium and lubrication conditions, plus inspection, packaging and delivery requirements. Mark undecided parameters as to be agreed.
Samples, orders and delivery
Are samples, mixed sizes and custom packaging possible?
Include these requirements in your RFQ. We will review sample availability, mixed-order arrangements, labels and packaging before confirming the quotation.
What are the MOQ and lead time?
MOQ and lead time depend on the material, diameter, grade, quantity and packaging. We confirm these in the quotation after reviewing your requirements.
Is BOYA Industries the certified manufacturer?
BOYA handles production planning, overseas sales, quality coordination and export service. ISO 9001 and IATF 16949 certificates belong to our manufacturing partner.
Do you supply carbon and stainless steel balls?
Yes. BOYA supplies carbon and stainless steel balls made to order by our manufacturing partners. Specify the material, treatment, dimensions, tolerance and quantity for a quotation.