Mill-Turn Machining near Chicago
Mill-turn capacity in the Chicago metro. Turning and milling in one setup — rotational parts with cross-holes, flats, keyways, and off-axis features completed without re-fixturing. Get matched with a verified shop.
Mill-turn combines a CNC lathe and a milling machine in one spindle. Parts that would normally require two setups — turn the OD and bore on a lathe, then move to a mill for cross-holes and flats — get completed in a single operation. No re-fixturing means no datum shift, tighter tolerances on feature-to-feature relationships, and faster cycle times.
Mill-Turn Capabilities
4140, 4340, 8620 alloy steels. 303, 304, 316L stainless. 6061/7075 aluminum. Brass, bronze. Ti-6Al-4V. Inconel 718. Delrin, nylon, PEEK.
±0.0005" on diameters. ±0.001" on milled features. Concentricity 0.001" TIR. True position ±0.002" on cross-holes relative to turned datums — achievable because everything is done in one chuck.
OD/ID turning, live-tool milling, cross-drilling, tapping, grooving, threading, knurling, keyways, flats, hex profiles, and C-axis contouring — all in one setup.
Live tooling with C-axis and Y-axis capability. Sub-spindle for complete backworking. Prototypes through production runs of 500+ pieces.
Typical Work
Hydraulic and pneumatic components: Valve bodies, manifold housings, and actuator cylinders with turned bores and cross-drilled ports. The feature-to-feature position tolerance between bore and port is critical — mill-turn holds it in one chuck.
Shafts and spindles: Turned diameters with keyways, flats, cross-holes, and threaded ends. Parts that would be 3 operations on separate machines become 1 operation on mill-turn.
Fittings and connectors: Hex-bodied fittings, flare fittings, and quick-connect bodies that combine turned sealing surfaces with milled hex or wrench flats.
Medical and aerospace hardware: Bone screws, orthopedic fixation components, and aerospace fasteners with complex multi-feature geometries completed in a single cycle.
Location
Chicago metro area. Network shops are local to the Chicagoland manufacturing corridor, serving OEMs and buyers across the Midwest.