Crank
描述
Forged Aluminum Bicycle Left Crank: Lightweight 6061-F Crank Arm
The forged aluminum bicycle left crank is the left-side crank arm of a crankset. One end connects to the bottom bracket axle and the other carries the pedal, with a lightening groove on the front face and round bosses at both ends. It is made of 6061-F aluminum with a published weight of 0.2 kg. Without a spider, the left crank has a simpler shape than the right crank.
Cranks carry repeated bending and torsion under pedaling and are safety parts of the drivetrain, so grain flow must stay intact where the arm meets each boss. Al Forge Tech (AFT) closed-die hot forges the arm and lightening groove, then CNC-machines the axle interface (square taper or spline) and pedal thread, verifying center distance and parallelism of the two holes on CMM.
主要功能
- 6061-F aluminum, 0.2 kg (published specification)
- Lightening groove forged into the arm
- Axle interface and pedal thread CNC-machined
- Center distance and parallelism measured on CMM
Forged Aluminum Bicycle Left Crank Specifications and Manufacturing Capability
| 商品 | 詳細 |
|---|---|
| 產品類別 | Aluminum Forging Bicycle Parts |
| 申請 | Bicycle and e-bike cranksets (left side) |
| 主要過程 | 閉式熱鍛造（熱鍛造壓機 600T–8,000T） |
| 材質 | 6061-F aluminum alloy |
| 熱處理 | Per customer specification (published specification: 6061-F) |
| 二次加工 | CNC 加工（52 台加工中心、30 台銑床）、銑削、振動磨削 |
| 表面處理 | 按要求進行陽極氧化（包括硬陽極氧化）、噴射粉碎、電子塗層或塗漆。 |
| 檢查 | Zeiss CMM (4 units), hardness testers, spectrometer, fluorescent penetrant inspection line |
| Weight | 0.2 kg |
| 尺寸與公差 | 按客戶提供2D/3D圖紙 |
| 品質管理系統 | IATF 16949:2016、ISO 14001:2015 |
Forged Aluminum Bicycle Left Crank Manufacturing Process
- 繪圖評估與 DFM我們確認合金、載荷方向和關鍵尺寸，然後執行 QForm 模擬，以預測金屬流動和缺陷風險。.
- 設計與製造銑刀組數（例如，阻斷刀和完成刀）視零件的複雜程度而定，銑刀輪廓則使用便攜式3D掃描儀進行檢查。.
- 熱鍛造600T–8,000T 熱鍛造壓 Presses 的閉式成形技術創造出持續的晶粒流，並遵循零件的輪廓。.
- 熱處理T4 溶液處理和 T6 人工老化處理均在廠內進行，參數由合金和強度要求設定。.
- CNC加工 以及完成孔、螺紋和接合面均經過機械加工，然後根據需要進行拋光、振動拋光、噴丸或陽極氧化處理。.
- 檢查與運輸尺寸、硬度及化學成分均通過 CMM、硬度測試儀及分光光度儀進行驗證，且所有批次的產品均遵照 IATF 16949 的標準進行追蹤。.
常見問題
What does 6061-F mean on the crank specification?
6061 is the alloy designation and F stands for “as fabricated”, meaning no specific heat-treatment temper is specified after forming. The published specification for this left crank is 6061-F; if the design needs more strength, it can be changed to T6 or another temper to customer specification, and AFT has in-house T4 solution and T6 aging equipment for this.
How is the center distance between crank holes ensured?
The center distance between the axle hole and pedal hole sets the crank length and thus the pedaling radius. AFT machines both holes in one CNC setup so they share a datum and measures center distance, parallelism and diameter on Zeiss CMM to keep left and right crank lengths consistent.
Can you assess forging feasibility while the Forged Aluminum Bicycle Left Crank is still in design?
是的。Al Forge Tech 主要作為 OEM 供應商提供服務，我們的工程師可以在構思或繪圖階段就設計的可生產性（DFM）提供意見，例如調整薄邊緣、急切的切面變化或設計角度，以避免殘料和未填充區域。QForm 模擬能及早預測金屬流動，並與我們已有的模具設計經驗進行交叉核對。.
How do you keep the Forged Aluminum Bicycle Left Crank consistent from lot to lot?
Al Forge Tech runs incoming (IQC), in-process (IPQC) and final (FQC) inspection under IATF 16949:2016, supported by 4 Zeiss CMMs, hardness testers, a spectrometer and a fluorescent penetrant inspection line. First, middle and last pieces of every lot are checked against the die; when wear causes dimensional drift, the die is reworked to keep the Forged Aluminum Bicycle Left Crank stable across lots.
What information do you need to quote the Forged Aluminum Bicycle Left Crank?
Please send a 3D model and 2D drawing, alloy grade and temper, critical tolerances, surface finish requirements, estimated annual volume and target delivery date. Complete data lets our engineers judge forging feasibility, the number of die sets and the machining scope for the Forged Aluminum Bicycle Left Crank at the quotation stage. If the design is still conceptual, a sketch is enough to start a DFM discussion.
Request a Quote for the Forged Aluminum Bicycle Left Crank
Developing a new Forged Aluminum Bicycle Left Crank or converting an existing part to aluminum forging? Send us your 3D/2D drawings, alloy and temper, annual volume and finishing requirements. Our engineering team will reply with a feasibility review, die plan and quotation.
- 線上查詢： 聯絡我們
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若要比較相似的零件，請瀏覽 Aluminum Forging Bicycle Parts 以及我們的 汽車鋁合金鍛造應用, 或參觀 公司簡介 關於我們的設備與認證。.
