CNC旋盤加工とは？
CNC旋盤加工は、ワークピースが高速で回転し、固定された単点切削工具がX軸とZ軸を移動する加工プロセスです。 The result is parts with cylindrical, conical, threaded or contoured profiles — shafts, pins, bushings, nozzles, fittings and more.
Standard CNC lathes are the most economical option for rotational parts up to 400 mm diameter and 1,500 mm length. Adding live tooling to the turret allows milling, drilling and tapping operations in the same setup — eliminating costly repositioning.
Swiss-type CNC turning uses a guide bushing to support the bar stock immediately adjacent to the cutting zone. This eliminates deflection and enables extremely long, slender parts — down to 0.5 mm diameter — at micron-level tolerances. It is the method of choice for medical screws, dental implants and precision electronics.
Choose standard turning for general-purpose cylindrical parts. Choose Swiss when L/D exceeds 10:1 or diameter falls below 6 mm. Add live tooling when cross-features would otherwise require a second machine. See our tolerance guide for detailed capability data.
CNC旋削加工の種類
CNC旋盤、スイス型旋削センター、ライブツーリング複合機を運用しています。
CNC Lathe Turning
2-axis CNC turning is the foundation of cylindrical part production. The workpiece rotates while a stationary cutting tool traverses in X and Z to produce shafts, pins, step-bores, threads and tapers with excellent repeatability.
- Standard tolerance ±0.01 mm
- Max diameter 400 mm
- Max length 1,500 mm
- Internal and external threads
Ideal for: shafts, pins, spacers, threaded fasteners, pulleys
CNC Turning with Live Tooling
Live-tooling lathes add rotating milling and drilling heads on the turret. Cross-holes, keyways, flats and off-centre features can all be machined without moving the part to a milling centre — saving setups and maintaining concentricity.
- Milling, drilling & tapping in one setup
- Off-centre and angular features
- Slot, flat, cross-hole in single clamping
- Better concentricity than multi-setup
Ideal for: valve bodies, hydraulic fittings, shafts with keyways or cross-holes
スイス型CNC旋削
Swiss-type lathes guide the bar stock through a guide bushing, supporting it right at the cut. This near-zero deflection setup allows extremely slender parts — down to 0.5 mm diameter — to be machined to micron-level precision at high feed rates.
- Min diameter 0.5 mm
- Tolerance to ±0.003 mm
- Ideal for long, slender parts
- High-volume production efficiency
Ideal for: medical pins, watch parts, dental screws, micro-shafts, electronics
旋削仕様
機種別クイックリファレンス仕様。
| 仕様 | CNC旋盤 | スイスCNC |
|---|---|---|
| 標準公差（直径） | ±0.01 mm | ±0.005 mm |
| 高精度公差 | ±0.005 mm | ±0.003 mm |
| 最大旋削径 | 400 mm | 32 mm |
| 最大旋削長 | 1,500 mm | 300 mm |
| 最小直径 | 2 mm | 0.5 mm |
| 表面粗さRa | 0.8 μm std | 0.4 μm std |
| ねじ規格 | M, UNC, UNF, BSPT | M, UNC, UNF |
| ライブツール | Available | Available |
公差は材料、L/D比および特徴形状によります。重要寸法のDFMレビューはお問い合わせください。
旋削可能材料
50種類以上の金属・エンジニアリングプラスチックを旋削加工します：
表面仕上げ
すべての表面処理を社内で提供しています。
旋削仕上げ
Ra 1.6–3.2 μm direct off the lathe. Tool marks visible but functionally clean surfaces.
研削
Post-turn cylindrical grinding to Ra 0.2–0.4 μm for bearing journals, sealing surfaces and precision fits.
陽極酸化
Type II or Type III hard anodizing for turned aluminum parts. Excellent corrosion and wear resistance.
電解研磨
Electrochemical smoothing for stainless steel turned parts. Ideal for FDA/medical applications.
ニッケルメッキ
Electroless nickel for uniform thickness on complex turned geometries. Excellent corrosion resistance.
Black Oxide
Conversion coating for steel turned parts — mild corrosion resistance, no dimensional change.
Passivation
Stainless steel chromium-oxide layer restoration after machining. ASTM A967 compliant.
研磨
Manual or mass-media polishing to mirror Ra <0.1 μm for shaft surfaces and hydraulic components.
CNC旋削設計ガイドライン
このガイドラインに従うことで正確な見積りを得て製造可能性を確保できます。
- L/D ratio below 10:1 for standard turning — slender parts beyond this ratio need steady rest support or Swiss-type machines.
- Internal bore diameter minimum 6 mm for standard boring bars. Smaller requires Swiss-type or gun drilling.
- Thread reliefs and undercuts add setup time — only specify where functionally necessary.
- Specify concentricity and runout as GD&T callouts on 2D drawing, not just dimensional tolerances in the model.
- Knurling, O-ring grooves and thread forms should be called out on the drawing with form standard (e.g. 60° Unified thread).
- Material selection matters for turning: free-machining grades (303 SS, C360 brass) cut faster and cheaper than work-hardening grades (316L, Ti).
対応業界
CNC旋削能力は6業界の要求の高い用途に対応しています。
部品の旋削加工をご依頼ですか？
CADファイルをアップロードして24時間以内に詳細なCNC旋削見積りを取得。最小注文数量なし。
Need milling too? Shafts with keyways, valve stems with hex drives, threaded parts with milled flats — run the whole job through our combined milling- and-turning shop instead. Same factory, same engineer, one quote, no fixturing re-stack error.
See CNC Milling + Turning Services
