Contract manufacturing of CNC-machined parts: turning, 5-sided milling, CAD/CAM, assembly and inspection.
HC GmbH Helmut Clemens
NettetalNew on Amplifa
About HC GmbH Helmut Clemens
HC GmbH Helmut Clemens is a contract manufacturer for CNC-machined precision parts, founded in 1994 in Nettetal-Breyell. The company manufactures turned parts, 5-sided milled parts and complex geometries from aluminium, steel, tool steel, stainless steel and plastics – from prototype and sample production through to series production. Design and CNC programming are carried out in the company's own CAD/CAM department in 2.5D and 3D. The machine park comprises around 15 CNC machines, some automated, including a mill-turn machine and a dual 5-axis system with automation (2021); production runs in two shifts, with an additional unmanned third shift on selected machines. The range of services is complemented by TIG and MIG/MAG welding, assembly of component groups with functional testing, surface treatment via long-standing partners, and logistics with an own delivery van within a 100 km radius, freight forwarding or UPS shipping. The Nettetal site offers 1200 m² of production space and 300 m² of office and staff facilities; 13 employees manufacture for the B2B supply industry and mechanical engineering. Since 2006 the quality management system has been certified to DIN EN ISO 9001.
- Site
- Nettetal
- Processes
- CNC turning, CNC milling (5-sided machining), CAD/CAM (2.5D and 3D design, CNC programming), Surface treatments (component coating via partner), Prototype and sample production, series production, Assembly of component groups with functional testing, Welding work (TIG and MIG/MAG), Quality inspection (coordinate measuring machines, surface roughness)
- Materials
- Aluminium, Steel, Tool steel, Stainless steel, Plastics, CAD/CAM (2.5D and 3D), 5-sided milling
- Certificates
- DIN EN ISO 9001:2015, ISO 9001
- Founded
- 1994
- Employees
- 13
- Industries
- B2B supply industry, Mechanical engineering, B2B supply industry / mechanical engineering
- 01
Material consulting and procurement
- 02
CAD/CAM design (2.5D and 3D) and CNC programming
- 03
CNC turning with axially and radially driven tools
- 04
CNC milling including 5-sided machining
- 05
TIG/MIG-MAG welding (on request)
- 06
Surface treatment via partners
- 07
Assembly of component groups with functional testing
- 08
Quality inspection (coordinate measuring technology, roughness measurement)
- 09
Logistics: own delivery van (100 km), freight forwarder or UPS up to 30 kg
Materials and Processes
Aluminium
Many years of experience in aluminium machining with high surface quality of the manufactured parts.
Steel
Machining to customer specifications, with design and CNC programming from a single source.
Tool steel
Machining for applications comparable to tool and mould making, to customer specification.
Stainless steel
Stainless components for demanding environments, manufactured on CNC turning and milling machines.
Plastics
Machining of engineering plastics as a complement to the metallic range.
CAD/CAM (2.5D and 3D)
Design and derivation of CNC programs for milling and turning machines via own workstations, connected to all machines via EIA/ISO.
5-sided milling
Complex contours and machining on five sides on a dual 5-axis system with automation.
Sites
Nettetal
DEProduction site and administration (Berger Feld 14)
- Lot size
- Prototype, sample, series
- Materials
- Aluminium, steel, tool steel, stainless steel, plastics
- 15 CNC machines (machining, partially automated)
- Mill-turn machine
- Dual 5-axis system with automation (2021)
- Coordinate measuring machine Mitutoyo Crysta Plus 574
- CNC coordinate measuring machine Wenzel LH 87
- Mitutoyo Surftest SJ-210r (roughness measurement)
- 100-kW photovoltaic system (2019)
Components and Services
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| CNC turningMachining | – | – | – | – | Aluminium, Stainless steel, Tool steel, Steel, Plastics |
| CNC milling (5-sided machining)Machining | – | – | – | – | Aluminium, Stainless steel, Tool steel, Steel, Plastics |
| CAD/CAM (2.5D and 3D design, CNC programming)Engineering | – | – | – | – | – |
| Surface treatments (component coating via partner)Surface | – | – | – | – | – |
| Prototype and sample production, series productionMachining | – | – | – | – | Aluminium, Stainless steel, Tool steel, Steel, Plastics |
| Assembly of component groups with functional testingAssembly | – | – | – | – | – |
| Welding work (TIG and MIG/MAG)Joining | – | – | – | – | – |
| Quality inspection (coordinate measuring machines, surface roughness)Inspection | (3.5+0.4 L/100)µm (CMM accuracy) | – | – | – | – |
6 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Mill-turn machine | – | – | – | – | Nettetal |
| Dual 5-axis system with automation | – | 1 | – | 2021 | Nettetal |
| CNC machines (machining, partially automated) | – | 15 | – | – | Nettetal |
| Coordinate measuring machine | Mitutoyo Crysta Plus 574 | 1 | X=500mm, Y=700mm, Z=400mm | – | Nettetal |
| Coordinate measuring machine (CNC) | Wenzel LH 87 (WH87) | 1 | X=800mm, Y=1000mm, Z=700mm | – | Nettetal |
| Surface roughness testing device (portable) | Mitutoyo Surftest SJ-210r | 1 | – | – | Nettetal |
Additional services
Quality and Measuring Equipment
Since 2006 the quality management system has been certified to DIN EN ISO 9001:2015. Complex geometries are captured on coordinate measuring machines from Mitutoyo (Crysta Plus 574, travel range 500×700×400 mm) and Wenzel (LH 87, 800×1000×700 mm); in addition, the portable roughness measuring device Mitutoyo Surftest SJ-210r is available in the production area – from caliper gauge to CMM, a wide range of measuring equipment is available.
| Evidence | Nettetal |
|---|---|
| ISO 9001 |
Company History
- 1994
Founded by Helmut Clemens in Nettetal-Breyell.
- 2002
Company renamed HC GmbH Helmut Clemens with three employees.
- 2005
Relocation to Lötscher Weg 67; expansion of production floor space from 400 m² to 800 m², five employees.
- 2006
Dominik Clemens completes his degree as mechanical engineering technician with additional BWA qualification; introduction of a certified quality management system.
- 2014
Move to the current production facility at Berger Feld 14 with 1200 m² of production and 300 m² of office/staff facilities, eight employees.
- 2019
Installation of a 100-kW photovoltaic system; ten employees, 15 CNC machines.
- 2021
Expansion of the machine park by four units, including a mill-turn machine and a dual 5-axis system with automation.