4-Axis Vertical Milling: Complex Geometry, Fewer Setups
A rotary fourth axis on a vertical machining center means parts come off the mill in one setup instead of three.
- Typical lead time
- 2–10 business days
- Minimum order
- 1 piece
- Shop location
- Troy, MI
- Files accepted
- STEP · IGES · DWG · PDF
4-axis vertical milling is what we reach for when a part has features on more than two sides, or when the geometry is rotational: shaft adapters, indexed bolt patterns, splined hubs, and helical pockets. The rotary axis spins the part so the same cutter can hit each face without refixturing, all on the same VMC we use for 3-axis work.
For the customer, the practical difference is fewer setups, fewer datum errors, and a lower piece price on anything that would have been a multi-op job on a 3-axis. We use 4-axis routinely for prototype shafts, gearbox housings, and short runs of complex bracketry that doesn't justify a 5-axis bill.
We don't pretend to be a 5-axis shop. If a part genuinely needs continuous 5-axis contouring, we'll say so and point you somewhere, usually before you've sent us drawings.
Typical applications
- 01Shaft adapters, couplings, and indexed flanges
- 02Gearbox and pump housings with features on multiple faces
- 03Splined hubs and rotary indexing fixtures
- 04Helical pockets, cam profiles, and indexed bolt patterns
- 05Prototype rotary mechanisms for robotics and automation builds
Materials we machine on this service
Don't see what you need? Ask about custom stock.