Quality control
Measured before it is packed
A base is not finished when it looks right — it is finished when the measuring machine says the numbers are the ones we confirmed in the quotation.
Inspection happens inside the lead time, not after it. Working faces and critical features are measured on a coordinate measuring machine (CMM) in a constant-temperature room, so the measurement itself is thermally stable. The records can travel with the shipment.
The figures we hold as standard:
- ±0.02 mm on fitting and ground features — mold pockets, guide-pillar bores, shut-off faces, plate parallelism
- Ground working faces flat and parallel to 0.02 mm / 100 mm
- Datum faces square to 0.02 mm / 100 mm
- Guide-pillar bore position ±0.02 mm
- Ground surfaces finish to Ra 0.8 µm
- General non-fitting dimensions: 0.3 mm — there is no reason to tighten them
- Above 600 mm: agreed case by case with the drawing, before the quotation is issued
Mark the datum. Half of the tolerance questions we see trace back to two parties measuring from different references, not to the machining itself. If your inspection measures from a particular edge or face, say so on the drawing.
Measurement capability. The inspection room is temperature-controlled and the measuring equipment works at micron level. We do not publish a single accuracy figure for the machine — what matters to you is which features are measured, against which datum, and that the records travel with the base.
On hardened work. Bases supplied at HRC52 hardness go through the same inspection after the hardening step, so the numbers you receive are the numbers of the finished part.