Aluminum E-bike Crank Arm
A load-bearing crank arm for electric bicycles, cast in gravity aluminum and finish-machined on 4-axis CNC. The part combines a light weight with the fatigue strength demanded by daily urban riding.
Product Overview
A load-bearing crank arm for electric bicycles, cast in gravity aluminum and finish-machined on 4-axis CNC. The part combines a light weight with the fatigue strength demanded by daily urban riding.
What Makes This Part Reliable
- Gravity casting removes the porosity that causes crack initiation under cyclic pedalling loads.
- 4-axis CNC holds the pedal-boss bore and spline concentricity in a single setup.
- Wall thickness optimised during DFM review to balance stiffness against weight.
Typical Applications
Specifications
| Part Code | LDW05 |
|---|---|
| Material / Alloy | ADC12 / A356 |
| Manufacturing Process | Gravity Casting + CNC Machining |
| Application Industry | Motorcycle & E-bike |
| Typical Weight | 0.3 – 1.5 kg |
| Dimensional Tolerance | ±0.1 mm |
| Surface Treatment | Shot blasting · Anodizing · Powder coating |
| Dimensional Standard | ISO 8062 CT7–CT9 |
| MOQ | 100 pcs |
| Lead Time | Sample 4–7 days · Mass production 15–30 days |
| Inspection | CMM, spectrometer, X-ray, hardness, metallographic |
| Part Category | Gravity Casting |
| Drawing Format | STEP / IGES / X_T / DWG / PDF — 2D & 3D both accepted |
Values shown are typical for this part family. Send your drawing and we will confirm the exact alloy, tolerance and price for your application.
Process Flow
- RFQ & DFMEngineers review your drawing, wall thickness, draft and tolerances, then recommend the process.
- QuotationWritten quote within 24 hours — tooling, unit price and lead time.
- ToolingIn-house mold or pattern, checked against a mold-flow simulation before cutting.
- T1 SampleFirst article shipped with a CMM report for your approval.
- Mass ProductionStable process parameters, in-line inspection and full lot traceability.
- Machining & SurfaceCNC finishing, then shot blasting or the treatment you specify.
- Final InspectionCMM, spectrometer, X-ray, hardness and metallographic analysis.
- Packaging & ShipmentExport carton or crate with desiccant; DDP available on request.
Need Aluminum E-bike Crank Arm produced to your drawing?
Send a STEP file or a sketch and our engineers will reply with a process recommendation, realistic tolerance advice and a written quote within 24 hours.
More from the Same Process Family
Other parts we produce with the same process route — send us a drawing and we will quote in 24 hours.
