Ball Screw Pre-Production Confirmation: Drawing, Nut, and Packing

Before production confirmation is not repeated discussion

Before production confirmation aligns the RFQ, quotation, drawing, and order information into one version. For end-machined parts, replacements, and batch orders, old information can cause assembly errors.

Lock drawing revision and end machining first

The drawing revision should show date or file name. End machining should confirm fixed side, support side, bearing journal, shoulder, thread, keyway, and coupling end dimensions. Do not only write machine according to previous drawing.

Confirm nut direction and matching parts

Nut direction, flange orientation, grease nipple position, preload or backlash, support units, lock nuts, and coupling end should be confirmed before production. Wrong assembly direction may cause rework on site.

Confirm labels, packing, and inspection report together

If neutral labels, customer labels, carton marks, shipment photos, or inspection report are needed, write them into the order confirmation before production and packing. Late requests can delay shipment.

Before production checklist

Before production confirmer, order number, quotation revision, and drawing revision.
End machining, overall length, thread length, support unit, bearing journal, and coupling end.
Nut direction, flange direction, preload or backlash, labels, and packing.
Inspection report, shipment photos, lead time, shipping method, 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