CNC Turning
Three Tsugami turning centres, bar and billet work to Ø280 mm, with inspection in the same building.
Turned work runs on a Tsugami fleet: two Mi08JL5 machines and an Mi08J-II. Bar capacity decides whether a job runs from bar or from billet, which changes both the price and the lead time, so it is the first number worth checking.
The turning fleet
| Specification | Value |
|---|---|
| Maximum turning diameter | Ø280 mm |
| Bar capacity | 65 mm |
| Spindle speed | 200–4,000 rpm |
| Main spindle power | 9 / 11 kW |
| Turret | 8 station (Mi08J-II) |
| Rapid traverse | X 24 m/min, Z 27 m/min |
| Machine mass | 3,430 kg (Mi08JL5), 3,300 kg (Mi08J-II) |
| Installed | Mi08JL5 × 2, Mi08J-II × 1 |
Figures from the RAVIS capability profile, pp. 12–13.
Bar or billet
Below 65 mm the part can run from bar, which removes a loading operation per piece and makes longer runs materially cheaper. Above it the work comes from sawn billet, and the setup cost per part rises. If your quantity is near the boundary it is worth telling us both figures — sometimes a small change to a diameter moves a job from one route to the other.
Concentricity and second operations
Features that must be concentric are best cut in a single chucking. Where a part needs work at both ends, the question becomes how the second operation is located and what that does to the tolerance between the two ends. It is worth marking on the drawing which diameters must hold relative to which — that decides the process plan more than the diameters themselves do.
What to send
Model and drawing, material and condition, quantity, and any surface finish requirement. Thread callouts should state the standard and class. Where a diameter carries a geometric tolerance referenced to a datum, say which datum — it determines whether the feature is verified on the CMM or on a gauge.
Turned parts are inspected in the same building; see metrology and inspection.