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Technical Guides

Ball Screw Technical Guides for RFQ Buyers

These guides answer practical purchasing and engineering questions before quotation.

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Choose a guide for your next buying step

If the task is already clear, jump directly into RFQ preparation, application selection, distributor stock planning, or order confirmation.

Prepare a quotable RFQ

Start the first email with model, length, quantity, packing, and purchase type.

Read RFQ email guide

Plan distributor stock

Plan common models, replenishment rhythm, labels, and export packing before price comparison.

Read stock planning guide

Prepare for order confirmation

Confirm the quote version, end machining, packing, lead time, and final approval before payment.

Read the confirmation checklist

Technical Guides

Featured Technical Guides

Start with frequent buyer questions on selection, machining, quality, and RFQ preparation.

Confirm the BK/BF support model before machining the shaft ends, then verify the drawing, bearing seats, threads, coupling end, and assembly length.
End Machining

BK/BF Ball Screw End Machining: Support Unit Drawing Guide

Confirm the BK/BF support model before machining the shaft ends, then verify the drawing, bearing seats, threads, coupling end, and assembly length.

Send end machining drawing
C7 and C5 differ in accumulated lead error, process, and lead time — not in being better or worse. Judge by the axis: most machines run C7, key axes need C5.
Selection Guide

C5 vs C7 Ball Screw: Accuracy, Cost, and Buyer Selection

C7 and C5 differ in accumulated lead error, process, and lead time — not in being better or worse. Judge by the axis: most machines run C7, key axes need C5.

Send accuracy requirements
Before requesting a custom ball screw quote, list the drawing, dimensions, accuracy, quantity, and packing requirements.
RFQ Checklist

What Information Is Needed for a Custom Ball Screw RFQ

Before requesting a custom ball screw quote, list the drawing, dimensions, accuracy, quantity, and packing requirements.

Open custom RFQ form
Record diameter, lead, overall length, travel, and end steps before sending old-part photos or samples.
Replacement

How to Measure a Replacement Ball Screw: 6 Dimensions

Record diameter, lead, overall length, travel, and end steps before sending old-part photos or samples.

Send replacement dimensions

Technical Guides

Latest Technical Guides

Review the newest purchasing, machining, and packing guidance by publish date.

Check the long-travel ball screw speed limit against its bore, support span, support method, and DN value.
Selection Guide

Ball Screw Critical Speed: Length, Support Method and Speed Limits

Check the long-travel ball screw speed limit against its bore, support span, support method, and DN value.

Send speed and support method
Convert load and life targets into dynamic and static load requirements, then state equivalent load, average speed, and target life in the RFQ.
Selection

Ball Screw Life and Load Rating: L10, Dynamic Load C, and Static Load C0 Explained

Convert load and life targets into dynamic and static load requirements, then state equivalent load, average speed, and target life in the RFQ.

Send load and life requirement
State stroke, load, speed, cycle time, and accuracy together when selecting a linear module and requesting a quote.
Selection

Linear Module Basics: Stroke, Load, Speed, and Accuracy Explained

State stroke, load, speed, cycle time, and accuracy together when selecting a linear module and requesting a quote.

Send linear module parameters
Understand every part of a ball screw assembly — screw and nut, BK/BF bearing blocks, coupling, and nut housing — and describe them correctly in your RFQ.
Selection

Ball Screw Components Explained: Parts and What They Do

Understand every part of a ball screw assembly — screw and nut, BK/BF bearing blocks, coupling, and nut housing — and describe them correctly in your RFQ.

Send component RFQ
Choose the ball screw accuracy class by positioning requirement and state the acceptance criteria in the RFQ.
Selection

Ball Screw Accuracy Class: C3, C5, and C7 Explained

Choose the ball screw accuracy class by positioning requirement and state the acceptance criteria in the RFQ.

Send accuracy requirement

Guide categories

Ball Screw Selection Guides

Compare ball screw specifications by machine use, accuracy requirement, speed, load, and budget.

C7 and C5 differ in accumulated lead error, process, and lead time — not in being better or worse. Judge by the axis: most machines run C7, key axes need C5.
Selection Guide

C5 vs C7 Ball Screw: Accuracy, Cost, and Buyer Selection

C7 and C5 differ in accumulated lead error, process, and lead time — not in being better or worse. Judge by the axis: most machines run C7, key axes need C5.

Send accuracy requirements
Check the long-travel ball screw speed limit against its bore, support span, support method, and DN value.
Selection Guide

Ball Screw Critical Speed: Length, Support Method and Speed Limits

Check the long-travel ball screw speed limit against its bore, support span, support method, and DN value.

Send speed and support method
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Guide categories

Replacement Ball Screw and Repair Guides

Check the old-part dimensions, installation details, and purchasing information needed for a replacement order.

Record diameter, lead, overall length, travel, and end steps before sending old-part photos or samples.
Replacement

How to Measure a Replacement Ball Screw: 6 Dimensions

Record diameter, lead, overall length, travel, and end steps before sending old-part photos or samples.

Send replacement dimensions
Old-part photos can start the RFQ, but they must be paired with key dimensions and installation details so quotation is not guesswork.
Replacement

How to Prepare a Ball Screw RFQ When You Only Have Old Part Photos

Old-part photos can start the RFQ, but they must be paired with key dimensions and installation details so quotation is not guesswork.

Send old-part photo RFQ
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Guide categories

Ball Screw End Machining Guides

Check support models, end drawings, installation dimensions, and machining risks before quoting.

Confirm the BK/BF support model before machining the shaft ends, then verify the drawing, bearing seats, threads, coupling end, and assembly length.
End Machining

BK/BF Ball Screw End Machining: Support Unit Drawing Guide

Confirm the BK/BF support model before machining the shaft ends, then verify the drawing, bearing seats, threads, coupling end, and assembly length.

Send end machining drawing
For a BF support-unit RFQ, state the model, shaft journal, lock thread, coupling end, and installation space.
End Machining

BF Ball Screw Support Unit Suppliers: Buying Guide

For a BF support-unit RFQ, state the model, shaft journal, lock thread, coupling end, and installation space.

Send support unit RFQ
Before end machining, confirm the support-unit model, screw diameter, bearing journal, coupling end, and installation space.
End Machining

BK/BF Ball Screw Support Unit Selection Guide

Before end machining, confirm the support-unit model, screw diameter, bearing journal, coupling end, and installation space.

Send support unit model
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Guide categories

Ball Screw Distributor Purchasing Guides

Set out the common inventory, packing labels, and batch purchasing details for distributor orders.

Choose fast-moving ball screw sizes, order bars or cut lengths, and state quantity, labels, packing, and lead time.
Distributor

Ball Screw Unit Distributor Buying Guide

Choose fast-moving ball screw sizes, order bars or cut lengths, and state quantity, labels, packing, and lead time.

Send stock request
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Ball Screw Quality and Packing Guides

Check inspection records, packing protection, rust prevention, and export transport risks.

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Guide categories

Ball Screw RFQ Preparation Guides

List the specifications, drawings, quantity, application, packing, and timing details needed in a first RFQ email.

Before requesting a custom ball screw quote, list the drawing, dimensions, accuracy, quantity, and packing requirements.
RFQ Checklist

What Information Is Needed for a Custom Ball Screw RFQ

Before requesting a custom ball screw quote, list the drawing, dimensions, accuracy, quantity, and packing requirements.

Open custom RFQ form
In the first RFQ email, state the purchase type, model, length, nut, quantity, packing, and required lead time.
RFQ Checklist

Standard Ball Screws First RFQ Email: What to Write

In the first RFQ email, state the purchase type, model, length, nut, quantity, packing, and required lead time.

Open standard parts RFQ
With a drawing, confirm revision and tolerances; without one, provide old-part photos, measurements, and application information.
RFQ Checklist

Ball Screw RFQ: With Drawing vs Without Drawing

With a drawing, confirm revision and tolerances; without one, provide old-part photos, measurements, and application information.

Send drawing or old-part details
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Guide categories

Need help with a different question?

Send the model, length, quantity, application, or old-part photos. We will review the specification against the actual machine and use case.

Send RFQ