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Put the right material in the right place
Select each section around wear, torque, weight or machining needs, then review the combination as one production route.
YUBAO manufactures made-to-print welded shafts for motors, rail door systems, compact drives and industrial equipment. When a one-piece shaft would waste material or complicate machining, a welded construction can combine different diameters, materials or functional sections in one finished component.
Each section is prepared for its job, joined through a controlled friction-welding route, then machined and inspected from the datums that matter in the assembly. Send the finished-part drawing, section details and annual demand, and our team will review the joint, finishing route and inspection scope.
Reference values for preliminary review. Final capability depends on geometry, material combination, heat treatment and inspection requirements.
A welded shaft makes sense when the design needs different diameters, materials or functional zones that would be inefficient to machine from one large blank. The joint should simplify production without weakening control of the finished geometry.
Select each section around wear, torque, weight or machining needs, then review the combination as one production route.
A multi-piece route can avoid oversized blanks, long turning cycles and material removal that adds no value to the finished part.
After welding, the critical journals, shoulders, splines, gears and interfaces can be machined and inspected as one functional shaft.
Reference ranges for early project screening. Final feasibility depends on the joint location, section geometry, material compatibility, heat treatment and finished-part datum plan defined in the drawing.
| Feature | Reference Capability | Engineering Relevance |
|---|---|---|
| Size & Construction | OD Ø21–350 mm · finished length up to 1000 mm · typically 2–3 sections | Used to screen overall scale, stock strategy and whether a multi-section construction is practical. |
| Joint & Welding | Controlled friction welding · single-section length up to 600 mm · finished flash down to 0.5 mm | Joint location, section proportions and material compatibility must be reviewed together before production. |
| Geometry & Finish | Straightness down to 0.02 mm · cylindricity 0.005 mm · radial runout 0.01 mm · ground areas Ra 0.2–0.8 μm | Final values depend on total length, section transitions, heat-treatment movement and finishing access. |
| Materials & Treatment | Representative combinations include 20CrMnTi / 45# steel, 42CrMo / 40Cr and stainless / carbon steel | Each material pairing requires weldability, heat-treatment response and service-condition validation. |
| Inspection & Balance | MPI or eddy-current inspection · UT or X-ray review where required · G6.3–G2.5 balance where applicable | Inspection depth and balance requirements follow application risk, speed and repeat-production needs. |
Open a group only when the drawing needs a deeper review of the joint, finished geometry, material route or inspection plan.
| Control Item | Reference Capability | Engineering Note |
|---|---|---|
| Outer Diameter | Ø21–350 mm | Final tolerance is assigned by feature; h6–h9 may be reviewed for suitable finished diameters. |
| Finished Length | Up to 1000 mm | Feasibility depends on section changes, straightness, heat treatment and grinding access. |
| Section Count | Typically 2–3 sections | Each section is selected and prepared around its function before joining. |
| Single-Section Length | Up to 600 mm reference | Applies before welding; final feasibility depends on diameter, mass and joint geometry. |
| Pre-Weld Joint-Face Control | End-face perpendicularity down to 0.01 mm | Joint-face preparation supports alignment, stable welding and reduced finishing allowance. |
| Straightness | Down to 0.02 mm | The requirement must be tied to finished length, datum scheme and measurement span. |
| Cylindricity | Down to 0.005 mm | Applied only to agreed journals, fits or ground shaft-body surfaces. |
| Radial Runout | Down to 0.01 mm | Reference journals, centers and the measured feature must be identified in the drawing. |
| Surface Finish | Ground areas Ra 0.2–0.8 μm | Applied to functional surfaces where bearing, sealing or rotating-fit performance requires it. |
| Finished Weld Flash | Down to 0.5 mm | Controlled through post-weld removal, machining and regrinding where required. |
| Surface Hardness | 55–62 HRC reference after treatment | Applicable only to compatible materials, surfaces and heat-treatment routes. |
| Review Area | Reference Information | Project Note |
|---|---|---|
| Primary Welding Route | Controlled friction welding | The route depends on material compatibility, section size, joint design and expected production volume. |
| Weld Strength Target | ≥95% of base-material tensile strength for validated combinations | The target must be confirmed through the agreed process validation and inspection plan. |
| Heat Treatment | Stress relief, quenching and tempering or drawing-defined treatment | Treatment sequence, distortion allowance and final machining should be planned together. |
| Wear-Resistant Gear Section | 20CrMnTi carburizing steel joined to 45# medium-carbon steel | May place wear resistance at the gear section while controlling material cost in the shaft body. |
| High-Torque Construction | 42CrMo quenched-and-tempered steel joined to 40Cr | May concentrate higher strength in the load-critical section. |
| Localized Corrosion Resistance | 304 / 316 stainless steel joined to carbon steel | May add corrosion resistance to an exposed section while limiting total stainless-steel content. |
| Non-Destructive Testing | MPI or eddy-current testing · UT or X-ray review where required | The method and sampling plan depend on joint risk, material, geometry and customer requirements. |
| Dynamic Balance | G6.3–G2.5 where required | Applied according to operating speed, rotor design and the finished assembly requirement. |
| Production Records | Material, heat treatment, inspection and batch traceability | Critical records and inspection scope are agreed during project review. |
Engineering note: Material combinations are references only. Weldability, heat-treatment response, corrosion behavior and service loads must be validated before production.
The value is not in the weld alone. It comes from preparing each section correctly, controlling the joint and finishing the dimensions that matter in the assembly.
The sections are turned, drilled or otherwise prepared before joining. This lets a large journal, a smaller motor interface, a hollow section or a gear feature start from stock that suits its own geometry instead of one oversized blank.
After the sections are joined, excess material is removed and the critical journals, shoulders, splines, gears and fit surfaces are finished where required. Runout, straightness and datum relationships are checked against the finished-part drawing.
Welded construction earns its place when one shaft has more than one job to do.
Combine lightweight sections with precision journals, encoder or brake interfaces used in responsive motor and robotic assemblies.
Join drive, screw, coupling or support sections where a long shaft needs different diameters or functions along its length.
Support stepped geometry, weight reduction and repeatable production for pulleys, motor shafts and compact drive components.
A welded route is not always the best answer. Compare these one-piece alternatives before the drawing is finalized.
Yes. YUBAO reviews the finished geometry, section details, joint position, materials, heat treatment, critical datums and expected quantity before confirming the manufacturing route.
Friction welding is reviewed for suitable shaft projects. The final route depends on the material combination, section size, joint design and performance requirements.
Compatible combinations can be reviewed when different sections need different wear, strength, weight or machining characteristics. Weldability and heat-treatment response must be confirmed first.
Send the finished-part drawing and 3D model where available, plus section geometry, joint location, materials, heat treatment, critical datums, prototype quantity and annual volume.