鍵 規格表
2種規格資料
鍵是插入軸與輪轂之間傳遞旋轉扭矩的緊固元件。平鍵(KS B 1311)最常見。鍵材質通常為S45C，重載時須檢查剪切強度和壓縮應力。
常見問題 (FAQ)
What is the difference between a parallel key and a Woodruff key?
Parallel keys have a rectangular cross-section with keyways in both shaft and hub, suited for high torque. Woodruff keys are semicircular with a deep shaft-only groove and self-aligning feature, mainly used on tapered shafts.
How do I select key dimensions?
Key width (b) × height (h) is determined by shaft diameter per KS/ISO standards. Example: 20–22mm shaft → 6×6, 30–38mm shaft → 10×8. Key length should be 1.0–1.5× the hub length.