Capability
Measured in microns,
not in promises.
Every line is closed-loop. Marposs active gauging reads the workpiece during grinding, the control compensates, and the next part starts from a corrected datum — which is how a P4 class stays a P4 class at volume.
- Lines
- 08
- Runout held
- 0.8 µm
- Stages
- 06
Closed loop
Correct the datum, not the scrap.
In-process gauging measures the part while it is still in the machine. The control compares that figure with the drawing, shifts the wheel feed and starts the next part from the corrected datum. The tolerance band is held by the machine, and checked again on the finished part.
- Marposs active gaugingItaly — in-process measurement during grinding.
- FANUC controlJapan — CNC control on the grinding and turning lines.
- Mitsubishi drivesJapan — drive and control for the automated assembly cells.
- Final inspectionBore, OD, width, runout and clearance, measured on the finished part.
Six stages, one flow
Material to packed box| 01 · Material control | Chemical composition checked against the certificate, metallographic analysis on each heat, hardness before the first cut. |
|---|---|
| 02 · Forging | Precision forging with spheroidise annealing, so the grain structure is right before machining. |
| 03 · Turning | CNC turning with dimensional control at the machine; blanks are checked before heat treatment. |
| 04 · Heat treatment | Quench and temper with hardness control per batch; distortion measured after tempering. |
| 05 · Grinding | Precision grinding with in-line measurement and closed-loop compensation on the active gauge. |
| 06 · Assembly & test | Cage and roller set assembly, clearance or preload set to drawing, noise and runout test before packing. |
What the plant can hold
Verified per batch, not sampled per year| Bore range | 3 – 1500 mm in series production, larger on application |
|---|---|
| Outside diameter | Up to 1800 mm for four-row and special designs |
| Accuracy classes | P0 / P6 / P5 / P4 to ISO, with P4 held on spindle and mill series |
| Runout held | 0.8 µm on the finished part for P4 spindle series |
| Cages | Pressed steel, machined brass, pin type, polymer, full complement |
| Heat treatment | Through-hardened and case-hardened, dimensional stability to 200 °C on request |
| Lot traceability | Heat number, heat-treatment batch and measurement file recorded per lot |
Ask for the process sheet.
For a specific part we will send the route, the gauges used and the control plan before the first piece is cut.