Machine shop
Provecta operates CNC turning, milling and surface grinding capabilities for the production of sealing hardware and precision components. By combining these processes in-house, we achieve tight tolerances, consistent quality and short lead times, even for demanding materials and critical applications.
Turning
Provecta has extensive expertise in the turning of sealing surfaces for a wide range of sealing types. Our specialists machine both seals and associated hardware with a strong focus on precision, surface finish and dimensional stability.
We machine sealing surfaces for, among others:
- Metal C-rings (spring-energized or non-spring-energized)
- O-rings
- U-seals and V-seals
- PTFE seals
- Lip seals
- Ring Type Joints (RTJ)
- Kammprofile seals
- Flat gaskets
- …
Our machine park is specifically configured for the precision turning of flanges and sealing-critical hardware, where concentricity, surface roughness and repeatability are essential.
Turning machines
DMG MORI NLX 2500/700
- Maximum turning diameter: 350 mm
- Dual spindle
- Y-axis
- Driven tooling (built-in turret)
- Spindle bore: 80 mm
DMG MORI NZX 1500/800 SY
- Maximum turning diameter: 150 mm
- Dual turret (64 tool positions)
- Dual spindle
- Y-axis
- Driven tooling
- Spindle bore: 50 mm
- Bar feeder
Schaublin 65TM-5Y
- Maximum turning diameter: 250 mm
- Dual spindle
- Y-axis
- Spindle bore: 52 mm
With these high-end precision machines, we preferentially machine stainless steels and other tough, difficult-to-machine materials, such as nickel- and cobalt-based alloys typically used in demanding sealing applications.
Milling
Milling fundamentally differs from turning in that the workpiece is clamped in a fixed position, while the rotating cutting tool, such as a mill, drill or tap, removes material. This makes milling particularly well suited for producing complex geometries and functional features that are difficult or inefficient to achieve in a turning process.
With its versatile milling capabilities, Provecta performs a wide range of machining operations, both on rectangular raw material and on components that have been pre-machined on the lathe. Turned parts are typically finished on the milling machine by adding additional functional features, such as:
- Drilling and counterboring
- Deep-hole drilling (10–20–30×D)
- Thread creation
- milling
- tapping
- Engraving and marking
- Milling of specific surface roughness values
(e.g. smooth finishes Ra 3.2–6.3)
These operations are essential for the production of sealing-critical hardware such as flanges, housings and test components, where dimensional accuracy and repeatability are key requirements.
5-axis milling machine
To perform these operations with the required precision and flexibility, Provecta operates a 5-axis milling machine:
DMU 80 T (Deckel Maho)
- Table diameter: 600 mm
- Maximum workpiece height: 420 mm
- Internal tool magazine with 32 tools
This rigid and powerful monoblock milling machine is ideally suited for machining harder and tougher materials, such as stainless steels and nickel-based alloys, commonly used in demanding sealing and energy-related applications.
Surface Grinding
For certain applications and assemblies, it is essential that the flatness and parallelism of critical components are strictly controlled. Depending on the diameter, we routinely achieve flatness values of 0.03–0.02 mm. When customer requirements are more stringent than 20 µm, our specialists perform an additional finishing operation on the surface grinding machine.
Thanks to the use of different grinding wheels, a wide range of materials can be machined with high precision, including:
- Carbon steel
- Aluminium
- Stainless steel
When required, components are also grinded after heat treatment, such as solution annealing or hardening, to ensure the required geometry and dimensional stability.
In addition to flatness, surface roughness often plays a crucial role. Depending on the material, we achieve roughness values below 0.4 µm (Ra).