RFQ checklist
- Shaft application and grade
- Diameter, length, allowance, and quantity
- Condition, UT, and traceability requirement
- Certificate, packing, and destination
Technical Resource
Choosing Steel Bars for Shaft Manufacturing
Shaft manufacturing starts with application, load, machining route, delivery condition, and inspection plan. The steel grade should be selected around the part and downstream process, not only the name on the drawing.
Quick Answer
What buyers should know first.
Shaft bar selection should connect grade, load case, diameter, condition, machining allowance, straightness, UT when required, traceability, and documents.
RFQ Comparison
Connect the topic to quotation impact.
| Topic | What to review | RFQ impact |
|---|---|---|
| Grade | CK45, 40Cr, 42CrMo4, or 34CrNiMo6 against load and application | Prevents selecting by grade name alone |
| Condition | Hot rolled, QT, forged, peeled, or machined route | Connects supply route with downstream machining |
| Inspection | UT, surface checks, straightness, traceability, and certificate scope | Clarifies requirements before quotation |
Application Examples
Where this guide is commonly useful.
Confirm details during RFQ review.
Confirm details during RFQ review.
Confirm details during RFQ review.
Common Mistakes
Reduce back-and-forth before quotation.
Buyer Guide
What to review before quotation.
Use this guide to prepare a clearer specification and reduce back-and-forth during RFQ review.
Grade discussion
42CrMo4 / 4140, 40Cr, 34CrNiMo6, and CK45 / 1045 may all appear in shaft discussions depending on load, toughness, machinability, and delivery condition.
Processing route
Buyers should confirm hot rolled, normalized, QT, peeled, ground, cut-to-length, or machining-preparation needs before quotation.
Inspection plan
For demanding shafts, discuss chemical verification, mechanical testing, dimensional inspection, UT on request, and traceability requirements.
Related Pages
Continue with the relevant product, application, and RFQ pages.
Open this page to connect the guide topic with product, processing, document, or RFQ details.
Open this page to connect the guide topic with product, processing, document, or RFQ details.
Open this page to connect the guide topic with product, processing, document, or RFQ details.
Open this page to connect the guide topic with product, processing, document, or RFQ details.
FAQ
Common buyer questions.
Which steel is used for shafts?
Common discussions include 42CrMo4 / 4140, 40Cr, 34CrNiMo6, and CK45 / 1045 depending on the application and condition.
Should shaft bars be QT?
QT may be required for higher-load shaft applications, but the target properties and standard should be stated in the RFQ.
What should shaft buyers confirm?
Confirm grade, condition, diameter, length, machining route, straightness, inspection, and certificate requirements.
RFQ
Turn this guide into a clear RFQ.
Include delivery condition, processing requirement, destination port, testing requirements, and certificate expectations so the supply route can be reviewed clearly.