CNC machining

CNC machining of metal parts

We machine parts on our CNC machining centre to hold tolerances, prepare seats and finish functional surfaces on demanding metal components.

Precision · Tolerances · Functional finishes

Request a quote +34 977 67 73 92 Reply as soon as possible

What is CNC machining?

Machining comes in when the accuracy of cutting and forming is not enough. Some dimensions have to hold tight tolerances, some surfaces have to be flat and smooth for another component to sit on, and some seats have to take a bearing, a shaft or a bolt with a specific fit.

The CNC machining centre works from the program prepared by our engineering office and carries out these operations on the part, holding the same dimension across the whole batch.

At Catà Germans machining is used mainly as a functional finishing process within jobs that start in sheet or tube, rather than as a standalone service: it is what lets us deliver a complete part instead of one that still needs another workshop.

Materials and thicknesses for CNC machining

Metals and sheet thicknesses we work with as standard. If your industrial project needs a material that is not in the table, say so in your enquiry and our engineering office will confirm whether we can handle it.

This service works with the same materials and thicknesses as the rest of the plant. The full table is on the Sheet metal laser cutting page.

CAD file formats accepted for quoting

  • DXF
  • DWG
  • STEP / STP
  • PDF
  • STL
  • IGS / IGES
  • PNG
  • JPG

With DXF, DWG or STEP we work straight from your file geometry: no need to redraw the part, and the quote comes back sooner.

We do more than check the drawing: we advise you on nesting (how the sheet is used) so you get the lowest possible price per part before anything is cut.

How our engineering office works

If you would rather not fill in the form, send the drawing straight to cata@catagermans.com.

Confidential handling. Your drawings are only used to prepare the technical assessment and are not shared with third parties. If you need a signed non-disclosure agreement, send it over.

Technical capabilities for CNC machining

Technical capabilities for CNC machining
Equipment CNC machining centre
Operations Tolerance work, seats, facing and functional surfaces
Preparation CAM programming from our engineering office
Volumes One-off and batch

Applications and types of custom metal parts

  • Seats for bearings, shafts and fixing elements.
  • Faced bearing surfaces within an assembly.
  • Correcting critical dimensions on cut or welded parts.
  • Functional finishing of parts that are then assembled.
  • Precision operations on already-welded assemblies.

Sectors we manufacture for

We manufacture for industrial companies across very different sectors. These are some of the most common ones, but not the only ones: if yours is not listed, tell us about the part and we will confirm whether we can make it.

  • Automotive
  • Food industry (stainless steel)
  • Agricultural machinery
  • Construction
  • Steel structures
  • Energy
  • Street furniture

Why work with Catà Germans

Every process under one roof
Cutting, forming, machining, welding and finishing in the same plant. We handle the whole logistics side so you receive the parts palletised and protected at your own factory, anywhere in Catalonia and the surrounding area, on the agreed lead time.
In-house engineering office
We review the drawing before manufacturing and prepare production from CAD/CAM. If something does not add up, we ask you instead of interpreting it ourselves. And if what you have is a sketch or a question, we will help with that too: advice is part of the service.
From drawing to finished product
Some finishes, such as painting or zinc plating, are done with specialist workshops. We handle the coordination and deliver with our own fleet: a single order and a part ready to fit.
Raw material in stock
We keep sheet and tube permanently in stock, so many standard jobs can start without waiting for material.
Over 65 years of the trade
A family business founded in 1958, specialised in industrial subcontracting of metal parts. You deal directly with the people who make the part.

All metal manufacturing services

Frequently asked questions

01CNC machining

When does a part need machining?

When the precision of cutting and forming is not enough: dimensions that must meet tight tolerances, surfaces that must be flat for another component to sit on, and seats that must take a bearing, shaft or bolt with a specific fit.

Which operations do you carry out on the machining centre?

  • Adjusting dimensions and tolerances
  • Seats for bearings, shafts and fasteners
  • Facing of seating surfaces
  • Finishing functional surfaces
  • Precision operations on welded assemblies

How is machining prepared?

Our engineering office prepares the program with CAM and the CNC machining centre runs it, holding the same dimension across the whole run.

02Precision and order of work

What tolerances can you hold?

It depends on the part, the material and the equipment assigned. Mark the critical dimensions and their tolerances on the drawing and we will confirm feasibility with the quote.

Can you machine a part that has already been welded?

Yes. It is a common order of work: weld the assembly first, then machine the dimensions that must be exact once welding distortion has settled.

03How we work

Do you offer machining as a standalone service?

Machining is usually part of a wider job that starts with sheet or tube: that is what lets us deliver the complete part rather than one that still has to go to another workshop. If you only need machining on your own part, send us the drawing and we will see whether we can take it on.

Do you make single parts and production runs?

Yes. We work on both single parts and production runs.

Can you also do the tapping and countersinking?

Yes. They are programmed together with the rest of the part's operations, so it arrives ready for assembly.

Can the part arrive already welded and machined?

Yes. Cutting, forming, welding and machining all happen in the same plant, under a single order.

04Engineering office and confidentiality

Does my file need redrawing to quote for CNC machining?

No. With DXF, DWG or STEP we work directly on the geometry in your file: the part does not need redrawing and the quote comes back sooner. We work mainly with SolidWorks and AutoCAD, among other CAD and CAM tools.

Are my drawings treated confidentially?

Yes. Drawings are used only to prepare the technical assessment and are not shared with third parties. If you need a signed confidentiality agreement, you can send it to us.

What if I only have a sketch or a technical question?

Send us a dimensioned sketch or tell us what you need. Our engineering office reviews it, asks whatever it needs to and, if necessary, helps you define the part: advice is part of the service, for metalworkers and small workshops too.

05Process, lead times and delivery

What happens after I send my request?

  • Enquiry: you send the drawing, material, thickness, quantity and deadline
  • Review by our engineering office and manufacturing plan
  • Quote and confirmation, with alternatives where there are any
  • Manufacturing within the same plant
  • Inspection, packing and delivery

What lead time does a CNC machining order have?

It depends on the part, the quantity and the other processes involved. In the quote request you can choose a 24/48 h urgent service (with a surcharge), about one week, a flexible deadline or a specific date, and we confirm it with the quote.

Do you have to wait for material before starting?

For many routine orders, no. We keep sheet and tube in permanent stock, so manufacturing can start without waiting for material.

Can you deliver the parts to our factory?

Yes, with our own fleet. We prepare the load and deliver the parts palletised and protected to the agreed point. We usually serve the provinces of Tarragona and Barcelona, and look at other destinations case by case.

06Sectors and experience

Which sectors do you provide CNC machining for?

We manufacture for industrial companies in very different sectors. Some of the most common:

  • Automotive
  • Food industry (stainless steel)
  • Agricultural machinery
  • Construction
  • Structural steelwork
  • Energy
  • Street furniture

Machining is used above all on functional parts for machinery, equipment and assemblies that are fitted later. If your sector is not listed, tell us about the part and we will confirm whether we can make it.

Why choose Catà Germans for CNC machining?

We are a family company founded in 1958, with more than 65 years in industrial subcontracting of metal parts.

  • Every process under one roof: cutting, forming, machining, welding and finishing
  • Our own engineering office, which reviews the drawing before manufacturing
  • Direct contact with the people who make the part
  • One order and one point of contact, right through to delivery

07Quotes, files and orders

Which file formats do you accept?

We accept PDF, DXF, DWG, STEP/STP, STL, IGS/IGES and also PNG or JPG images. If you do not have a final drawing yet, send us a dimensioned sketch and we will review it all the same.

Do you make one-off parts or only production runs?

We handle one-off parts and prototypes as well as small, medium and large batches and repeat production. You can specify this in the quote request.

How quickly do you reply to an enquiry?

We send the technical response as soon as possible once we have the drawing and the part details.

Do you offer painting, zinc plating or other surface finishes?

You can include them in the order. These finishes are carried out with specialist workshops we work with regularly, but we handle the coordination and the transport: you place a single order and receive the finished part.

Can I combine several processes in one part?

Yes — that is the normal way we work. A part can go through laser cutting, bending, welding and finishing inside the same plant, under a single order and a single point of contact.

Let's begin

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Send us the drawing and the part details and we will come back with a technical answer as soon as possible.

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