What to Confirm Before Replacing a Ball Screw in CNC Repair

Quick answer

For CNC repair replacement, start with the machine axis, travel, old part photos, end machining, support unit, nut style, and accuracy requirement before asking for price. weimute can help compare the old part with a manufacturable replacement route, but the RFQ must show the axis and installation details clearly.

Application decision table

| CNC repair situation | What to check first | RFQ risk if missing | | --- | --- | --- | | X or Y axis replacement | Travel, overall length, thread length, support unit | Stroke may change after installation. | | Z axis replacement | Load, brake, drop risk, nut style | Vertical safety and thrust margin may be wrong. | | Old screw is worn | Measure unworn section and send old part photos | Worn dimensions may mislead end machining. | | Machine is urgent | End machining drawing, coupling side, delivery target | Fast quotation still needs fit-critical dimensions. |

RFQ checklist

CNC repair details: machine type, brand or model, axis, travel, urgency, and quantity.
Screw data: diameter, lead, overall length, thread length, both end lengths, and working travel.
Old part photos: full screw, both ends, nut, flange, mounting holes, marking text, and measurement positions.
End machining: fixed side, support side, bearing journals, lock thread, keyway, retaining groove, and coupling end.
Assembly needs: support unit model, nut style, accuracy, backlash or preload, packing, and target delivery time.

Send us the repair evidence

Send weimute the old part photos, axis information, measured dimensions, and delivery target together. Our manufacturing and sales team will identify missing dimensions, suggest whether a standard, bar-stock, or custom end-machined route is suitable, and return a quotable RFQ list.

FAQ

**Can CNC repair start without a drawing?** Yes, but the RFQ must include old part photos, measured dimensions, support unit information, and machine use.

**Is the highest accuracy always needed?** No. The replacement should match the original machine requirement; accuracy, preload, and backlash should be chosen by use case rather than price alone.

Next step

Turn this guide into an RFQ

When the specification direction is clear, send the details below together with quantity, lead time, and packing requirements.

Include these details

Old-part overall length, thread length, diameter, lead, and nut style.
Full old-part photos, both end details, nut flange, and mounting-hole photos.
Machine use, whether it is a like-for-like replacement, quantity, and lead time.

Send CNC repair replacement details View applications