Application
Shaft Bars
Round bars for motor shafts, gear shafts, transmission shafts, and other rotating parts.
Matching Logic
Start from the part, then match grade and route.
JOTAIN supports buyers by connecting part application, grade, delivery condition, processing route, inspection requirement, packing, and destination into a practical RFQ path.
Buyer checks
- Fatigue resistance
- Machinability
- QT condition
- UT on request
Buyer Problem
What buyers normally need to control.
Shaft bar buyers need fatigue resistance, straightness, machining allowance, QT condition, UT on request, surface-defect control, traceability, and document scope reviewed together.
Common materials
- 42CrMo4 / 4140
- 40Cr
- 34CrNiMo6
- CK45 / 1045
Typical processing route
- Confirm shaft application, load case, grade, diameter, length, and quantity.
- Review QT or other delivery condition against target properties and active standard.
- Confirm machining allowance, straightness expectation, and surface route.
- Review UT, surface inspection, traceability, and certificate scope when required.
- Confirm packing, labels, bundle plan, and destination.
Inspection and documents
- Mechanical-property target and certificate format
- UT request and acceptance basis when required
- Traceability, heat number, and third-party inspection timing
Application Details
Review the route before quotation.
- General shafts
- CK45, 40Cr, or 42CrMo4 may be reviewed depending on load, machining, and condition.
- Heavy-duty shafts
- 34CrNiMo6 and 42CrMo4 are common review routes when toughness, load, and traceability are important.
- Inspection scope
- UT, surface checks, and certificate requirements should be stated before quotation.
RFQ Checklist
Send the details that affect grade and processing.
- Shaft application and load context
- Grade or equivalent standard
- Diameter, length, machining allowance, and quantity
- Delivery condition and target properties
- UT, certificate, packing, and destination needs
Private Factory Processing
Route selection can include JOTAIN factory processing.
Processed through JOTAIN's private factories when project requirements call for heat treatment, peeling, grinding, straightening, chrome plating or cut-to-length preparation.
Factory route check
Confirm whether the application requires heat-treated, peeled, ground, straightened, chrome-plated, or cut-to-length preparation before quotation.
Related Routes
Review grade, processing, and document needs together.
Compare core grade routes before finalising the RFQ.
Match delivery condition, surface route, and downstream manufacturing needs.
State certificate, testing, traceability, and inspection requirements early.
RFQ
Send requirements for shaft bars.
Include part type, grade or equivalent standard, diameter, length, quantity, delivery condition, processing route, destination port, and certificate requirements.