A CNC Bed Milling Machine removes material with a rotating cutter, producing pockets, slots, contours and three dimensional surfaces. This page covers the CNC Bed Milling Machine configured with a 4-axis rotary table and probing and supplied to aerospace suppliers: CNC milling with adaptive roughing and finish passes. The headline figure is pocket depth held within 0.05 mm, and the rest of the page explains what it means in daily use.
In practice the difficulty is rarely the nominal size. ±0.02 mm is held on the features that locate the part in the assembly, and the process is set up so that the first piece and the five hundredth measure the same way.
Specification
| Process | Cnc milling with adaptive roughing and finish passes |
|---|---|
| Material / configuration | a 4-axis rotary table and probing |
| Size / capacity | pocket depth held within 0.05 mm |
| Tolerance | ±0.02 mm |
| Surface finish | milled finish, Ra 0.8–3.2 µm |
| Application | cnc bed milling machine for aerospace suppliers |
| Inspection | Dimensional report, material certificate, first article report on request |
| Lead time | 7–15 working days for samples, 3–4 weeks for production |
| Minimum order | 1 piece for prototypes, from 50 pieces for production pricing |
Manufacturing process
Production begins with a drawing and material review. Stock is certified, the operation sequence is fixed, and CNC milling with adaptive roughing and finish passes is carried out on equipment maintained to hold ±0.02 mm over a full shift, not just on a first piece.
Material is purchased against a certificate and checked on receipt, so the composition is known before any cutting starts. Work in progress is identified by part number and operation, and the finished parts are deburred, cleaned and protected before they leave the machine area.
Typical applications
Most of the work supplied in this category falls into the following examples.
- Mould and die cavities.
- Machine base plates.
- Aerospace ribs and spars.
- Impeller and blisk roughing.
- Instrument panels and enclosures.
Quality control and documentation
Inspection is not a final formality. Dimensions are checked during the cycle and again at the end, so drift is corrected while there is still stock to remove.
Material certificates to EN 10204 3.1, dimensional reports and first article inspection reports are issued with the shipment where the application requires them. Calibration dates and measurement uncertainty are recorded alongside every result.
Ordering, lead time and packaging
Orders start from a single piece. Samples are quoted from the 3D model, and production pricing follows once quantity, finishing and inspection are agreed.
Frequently asked questions
What is the difference between 3, 4 and 5 axis?
Three axis machines cut prismatic parts; a fourth rotates the part for features around a cylinder; five axis tilts the cutter or table so compound angles are reached in one setup.
How is surface finish controlled?
By the stepover, the cutter geometry and the final finishing pass. Ra 1.6 µm is routine, and Ra 0.8 µm is achieved with a fine stepover and a sharp, balanced tool.
Do you keep tooling and programmes for repeat orders?
Fixtures, tool lists and verified CAM programmes are retained for the life of the part number, so a repeat release runs on the same setup as the first batch without a new proving run.
Send the drawing or the 3D model for a quotation. Include material, quantity, tolerance and finish, and a detailed quote with lead time is returned within one working day.
