Drawings first, notes second
For custom ball screws, 2D or 3D drawings are the best starting point. Text notes can add material, accuracy, inspection, packing, and application conditions, but should not replace key dimensions.
What if the drawing is incomplete
If a complete drawing is not available, send old part photos, measured dimensions, machine model, installation space, and working conditions. The supplier can judge whether engineering review is needed.
Core checklist before quotation
The earlier diameter, lead, length, nut, accuracy, end machining, quantity, and delivery target are clear, the easier it is to quote accurately.
- Diameter, lead, overall length, and thread length.
- Nut style, preload, or backlash requirement.
- End machining drawing or support model.
- Application, quantity, lead time, and packing request.
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.