How to Check Ball Screw Quotation Items Before Ordering

Confirm which RFQ version the quotation follows

A ball screw quotation should match a clear RFQ version. Before ordering, check model, quantity, diameter, lead, overall length, thread length, and accuracy against the latest confirmed information.

Do not compare end machining and nut only by price

If the quotation includes end machining, confirm fixed side, support side, bearing journals, lock thread, keyway, coupling end, and support model. Nut style, flange direction, preload, or backlash should also be written clearly.

Packing and lead time need boundaries

Packing should state rust prevention, carton, hard tube, wooden case, labels, carton marks, and whether shipment photos are provided. Lead time should state whether counting starts after order confirmation, payment, or drawing approval.

Confirm changed items before payment

If quantity, length, accuracy, packing, or shipping method changes after quotation, ask for an updated quotation. Using one confirmation checklist before payment reduces production and shipment disputes.

Quotation confirmation checklist

Model, quantity, diameter, lead, overall length, thread length, and accuracy.
End machining, support model, coupling end, nut style, preload, or backlash.
Packing, rust prevention, labels, carton marks, shipment photos, and inspection report.
Lead time start point, destination country, payment terms, changed items, and final confirmer.

Typical buyer situations

This topic usually appears in distributor stocking, repair replacement, machine retrofit, automation projects, and drawing-based purchasing. If a buyer sends only one model number, the supplier cannot judge the real use, packing risk, or whether machining upgrades are needed.

Details to confirm before quotation

To reduce repeated questions, the RFQ should cover product specification, use case, and delivery expectations together. The following points can be copied into the RFQ form or email.

Purchase purpose: distributor stock, repair replacement, machine project, or sample testing.
Specification: diameter, lead, overall length, thread length, nut type, and quantity.
Machining: cut-to-length, end machining, and whether BK/BF, FK/FF, EK/EF, or other supports must be matched.
Delivery: target quantity, expected lead time, packing, labels, shipping method, and whether shipment photos are required.

Common mistakes

A common mistake is asking only for unit price without application, quantity, or packing details. Another is sending photos without dimensions. This turns quotation into guesswork and can create errors in end machining, nut matching, or long-part shipping.

Next step

If the specification is clear, submit an RFQ directly. If the model or accuracy grade is still uncertain, describe the machine use and old part details so the supplier can recommend a standard part, bar stock, cut-to-length, or end machining route.

Submit related RFQ Open RFQ form