Technical questions

It depends on the process. In turning, the published maximum diameter is Ø600 mm. In simultaneous 5-axis milling the part fits an envelope of Ø500 × 320 mm, up to 200 kg on the trunnion table. In 3-axis milling the travels are 762 × 406 × 508 mm. Sawing takes bar up to Ø560 mm, and wire EDM cuts thicknesses up to 500 mm.

If the part sits at the limit, the fastest answer is the interactive envelope on the home page: entering diameter and length shows which machines take it.

The relevant question is not whether a large machine exists, but how many machines can actually take a part of a given diameter. A part that fits one machine depends on that machine: a service interval or another customer’s rush order moves the delivery date. A part that fits six machines has a different delivery certainty, at the same price.

For a specific part, the number of machines that can take it is given at quotation, on the basis of the drawing.

Tolerance is not a property of the company; it is a property of the dimension. On the same part, a ground bearing journal and a clearance hole are not machined to the same class and do not cost the same.

Three things matter at quotation: which dimensions are functional, to what class, and whether grinding follows turning. Turning reaches the usual assembly fits. Where tighter is required, the dimension is left with an allowance and ground after the CNC work - grinding gives the geometry and the finish that cutting can no longer tighten.

The functional dimensions are marked on the drawing. The rest is machined to the general class and does not raise the price.

.step · .stp · .iges · .igs · .x_t · .dxf · .dwg · .pdf. At most 10 files per request, each up to 25 MB.

The fastest quotation comes from a 3D model plus a dimensioned 2D drawing: the model gives the shape without ambiguity, the drawing gives the tolerances, the surface finish and the material requirements. With a 3D model alone, tolerances would have to be assumed - and we do not assume them.

Files are checked by their signature, not by their extension, and are stored outside the public area of the server under generated names.

Within 48 hours. Where the part needs a clarification - a dimension that does not close, an unspecified material, a treatment that changes the routing - the clarification is raised before the deadline runs out, not after.

Five things, in the order in which they change our calculation.

1. The material and its condition. “Steel” is not enough: quenched-and-tempered 42CrMo4 and S235 are turned with different tooling and different parameters.

2. The functional dimensions with their tolerances - the ones that go into an assembly, not every dimension on the drawing.

3. Surface finish where it is required. A surface at Ra 0.8 and one at Ra 3.2 are two different operations.

4. Quantity and call-off pattern. Ten pieces once, and ten pieces a month for a year, are two prices: the set-up is amortised differently.

5. The documentation required on delivery. The material certificate and the dimensional report are planned together with the part, not improvised at dispatch.

In order: the number of set-ups, the class of the tightest tolerance, and the batch size.

A part finished in a single set-up has no repositioning error and no set-up time on a second machine - which is why a simultaneous 5-axis centre changes the calculation on complex parts, even though its hourly rate is higher.

The tightest tolerance on the drawing dictates the whole routing: if it calls for grinding after the CNC work, the part goes through one additional operation. That is why it matters that it is tight only where it genuinely needs to be.

6 groups common in current production - carbon and alloy steels, stainless steels, tool and hardened steels, aluminium, brass, bronze and copper, technical plastics - plus nickel alloys and titanium on request.

Each group is set out on the materials page, with the usual grades and what each one means at the cutting edge: which can be quenched and tempered, which arrives already tempered, which is a case-hardening steel and why final dimensions are cut before heat treatment.

Yes. Certificates 3.1 or 3.2 to EN 10204, with every delivered lot.

The heat number is recorded at sawing, and from that point the part can be traced back to its certificate. Traceability is not a document attached at the end; it is a record made at the first operation.

A first-article report, a dimensional report on the critical dimensions of the lot, and the material certificate.

The first article is measured in full on the coordinate measuring machine; the series is inspected on the critical dimensions. The method, SPC and GD&T are described on the quality page.

The quality management system is certified to ISO 9001. The issuer, number, dates of issue and expiry, and scope of the certificate are on the certifications page.

The minimum batch size is a commercial decision, not a technical limit, and is set at quotation.

The part is sent with the quantity and the call-off pattern required; the answer follows within 48 hours.

Yes. We deliver regularly to Germany and the Czech Republic, and the site, the quotation and the delivery documentation are available in Romanian, English and German.