How to Measure a Replacement Ball Screw

Quick answer

To measure a replacement ball screw, record diameter, lead, overall length, thread length, nut shape, mounting holes, shaft-end dimensions, and old-part photos before asking for price. weimute can use these details to judge whether the replacement is standard, near-standard, or custom machined.

Buyer decision table

| Measurement item | How to capture it | Why it matters | | --- | --- | --- | | Diameter and lead | Caliper plus travel per revolution | Identifies the basic ball screw model. | | Overall length | Measure full shaft end to end | Prevents replacement length errors. | | End machining | Measure each step diameter and length | Determines whether custom machining is required. | | Nut and flange | Photo and hole spacing | Confirms nut style and mounting fit. |

Replacement RFQ checklist that can be quoted

Take an overall photo of the old ball screw before removing small parts.
Record diameter, lead, overall length, and thread length in one measurement table.
Capture shoulders, bearing journals, and keyways on both shaft ends.
If the thread is worn, measure the unworn section and send a photo with a ruler or caliper.
Add support model or installation dimensions, machine use, quantity, and target delivery time.

RFQ checklist

Take photos of the full screw, both shaft ends, nut flange, and any labels or markings.
Measure diameter, lead, overall length, thread length, and usable stroke.
Measure fixed-side and supported-side shaft-end steps, threads, keyways, and grooves.
Share machine model, axis position, urgency, quantity, and destination.
Mark any uncertain measurement so weimute can ask for confirmation before quoting.

Send us old-part photos and measurements

Send weimute the photos and measurement table together. Our manufacturing and sales team will tell you which dimensions are enough, which are missing, and whether a drawing is needed before production.

FAQ

**Can weimute identify a replacement from the model code only?** Sometimes, but photos and measurements reduce the risk of wrong end machining or nut style.

**What is the most common replacement mistake?** Overall length and shaft-end steps are often measured incompletely, causing assembly problems.

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 replacement dimensions View custom ball screw service