Manufacturer of precision turned parts from 2 to 32+ mm in diameter in small, medium and large series on over 200 automatic lathes
Klumpp GmbH & Co. KG
Bretten · Pößneck · BacăuNew on Amplifa
About Klumpp
Klumpp GmbH & Co. KG, founded in 1969 and headquartered in Bretten, is a manufacturer of precision turned parts. The company produces demanding turned parts with diameters of 2 to 32+ mm on over 200 CNC-controlled and cam-controlled multi-spindle machines, rotary transfer machines and single-spindle lathes – from small series to production in the millions, with around 19 million precision parts per year. Materials processed include stainless steel, free-cutting steel, copper alloys, aluminium and brass as 3-meter bar stock with runout and dimensional tolerances down to 0.01 mm. The depth of production covers heat treatment with an in-house through-feed furnace, hard turning, grinding, lapping, blasting, deburring, surface treatment, and the assembly of modules up to complex assemblies. Customers come from the automotive industry, medical technology, hydraulics and pneumatics, mechanical and plant engineering, as well as electrical engineering and electronics. Around 430 employees work at the three sites in Bretten, Pößneck and Bacău on over 25,000 m² of production space.
- Site
- Bretten
- Processes
- Turning (precision turned parts, series production), Turning on CNC-controlled multi-spindle machines, Turning on cam-controlled multi-spindle automatics, Turning on rotary transfer machines (turned and milled components), Soft turning (single-spindle lathes), Hard turning, Through-feed grinding, Fine grinding
- Materials
- Stainless steel, Free-cutting steel, Copper alloys, Aluminium, Brass, Precision Turning (Multi-Spindle), Cam-Controlled Multi-Spindle Automatics, Rotary Transfer Machines
- Certificates
- ISO 9001:2015, IATF 16949:2016, ISO 14001:2015, ISO 50001:2018, ISO 9001:2015 (Pößneck plant), ISO 14001:2015 (Pößneck plant), ISO 50001:2018 (Pößneck plant)
- Founded
- 1969
- Employees
- approx. 430
- Industries
- Automotive industry, Medical technology, Hydraulics & Pneumatics, Mechanical and plant engineering, Electrical engineering & Electronics, Watch industry (historical)
- 01
Consulting and project support from component development onward
- 02
Tool design (external tool grinding shop on site)
- 03
Turning on multi-spindle/rotary transfer/single-spindle machines
- 04
Heat treatment / hardening in own through-feed furnace
- 05
Hard turning, through-feed and fine grinding
- 06
Lapping, blasting, deburring, surface treatment
- 07
Assembly group assembly
- 08
100% quality inspection incl. residual dirt analysis
- 09
Shipping
Materials and Processes
Precision Turning (Multi-Spindle)
CNC-controlled multi-spindle machines for complex components with tight tolerances and changing lot sizes.
Cam-Controlled Multi-Spindle Automatics
Mechanical cam control for extremely short cycle times and production volumes in the millions.
Rotary Transfer Machines
Multi-station technology for complex turning and milling components at high volumes.
Hard Turning
Finishing of hardened materials with tolerances of a few hundredths of a millimeter.
Heat Treatment
Own through-feed furnace with controlled atmosphere of hydrogen and nitrogen for dimensional stability in series production.
Grinding and Lapping
Through-feed and fine grinding as well as lapping for highly precise surfaces and the tightest form and position tolerances.
Blasting and Deburring
Surface finishing from own production for consistent process reliability.
Assembly Group Assembly
Assembly of simple modules up to complex assemblies, tailored to customer requirements.
Locations
Bretten
DECompany headquarters / Bretten plant
- Lot size
- Small series to production in the millions
- Materials
- Stainless steel, free-cutting steel, copper alloys, aluminium, brass
- CNC-controlled multi-spindle machines
- Cam-controlled multi-spindle automatics
- Rotary transfer machines
- Single-spindle lathes (soft and hard turning)
- Hard turning machines
- Through-feed furnace (hydrogen/nitrogen)
- Automatic inspection machines (own design)
Pößneck
DEPößneck plant (Klumpp Präzisionswerk GmbH & Co. KG)
- CNC-controlled multi-spindle machines
- Cam-controlled multi-spindle automatics
- Rotary transfer machines
- Single-spindle lathes (soft and hard turning)
- Hard turning machines
Bacău
ROBacău plant (Klumpp S.R.L.), production of very small series
- Lot size
- Very small series
- Automatic lathes
- Quality inspection
Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Turning (precision turned parts, series production)Machining | down to 0.01 mm (tight runout and dimensional tolerances) | 3-meter bar stock × 32+ mm diameter | – | Small series – Production in the millions | Stainless steel, Free-cutting steel, Copper alloys, Aluminium, Brass |
| Turning on CNC-controlled multi-spindle machinesMachining | – | approx. 17 mm diameter (example) | – | approx. 1 million units/year (example) | Brass |
| Turning on cam-controlled multi-spindle automaticsMachining | down to 0.01 mm | max. 10 mm (examples) | – | approx. 15 million units/year (example) | Stainless steel |
| Turning on rotary transfer machines (turned and milled components)Machining | tight tolerances | – | – | high volumes | – |
| Soft turning (single-spindle lathes)Machining | – | – | – | smaller volumes | hardenable materials |
| Hard turningMachining | < 0.01 mm (a few hundredths of a millimeter) | max. 10 mm (example) | – | – | hardened materials |
| Heat treatment | – | – | – | Series | – |
| Through-feed grindingMachining | tight dimensional tolerances · highly precise surfaces | – | – | – | rotationally symmetric components |
| Fine grindingMachining | the tightest form and position tolerances · highest surface qualities | – | – | Series | – |
| LappingMachining | – | – | – | – | – |
| BlastingSurface | – | – | – | – | – |
| DeburringSurface | – | – | – | – | – |
| Surface treatmentSurface | – | – | – | – | – |
| Assembly group assembly / Assembly (modules to complex assemblies)Assembly | – | – | – | – | – |
| Inspection | micrometer range | – | – | 100% per part | – |
8 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| CNC-controlled multi-spindle machines | – | – | – | – | Bretten, Pößneck, Bacău |
| Cam-controlled multi-spindle automatics | – | – | – | – | Bretten, Pößneck, Bacău |
| Rotary transfer machines | – | – | – | – | Bretten, Pößneck, Bacău |
| Single-spindle lathes (soft and hard turning) | – | – | – | – | Bretten, Pößneck, Bacău |
| Hard turning machines | – | – | – | – | Bretten, Pößneck, Bacău |
| Through-feed furnace (heat treatment, hydrogen/nitrogen atmosphere) | – | – | – | – | Bretten |
| Automatic lathes | – | over 200 | – | – | Bretten, Pößneck, Bacău |
| Automatic inspection machines (own design) | – | – | – | – | Bretten |
Additional services
Quality and Certifications
Every component is inspected 100% – manually or on fully automatic inspection machines (own design), with visual, dimensional, leak and hardness testing, residual dirt analysis and metrology in the micrometer range. Raw materials are inspected on incoming goods, and every batch is fully documented; certified to IATF 16949, ISO 9001, ISO 14001 and ISO 50001.
| Evidence | Bretten | Pößneck |
|---|---|---|
| ISO 9001:2015 | ||
| IATF 16949:2016 | ||
| ISO 14001:2015 | ||
| ISO 50001:2018 |
History
- 1969
Founded in Bretten; production of turned parts for the watch and entertainment industry
- 1973
Construction of the first own company building with approx. 600 m² of production space
- 1987
Entry into the automotive industry and continuous expansion of production areas
- 1999
New construction of a production site in Bretten with over 6,500 m²
- 2001
Certification to ISO/TS 16949
- 2003
Opening of the second production site in Pößneck (Thuringia)
- 2007
Expansion of the Bretten site: additional production halls of 14,000 m²
- 2008
Commissioning of the company's own training center
- 2011
Start of new construction with over 4,000 m² of production space in Bretten (inauguration 2012)
- 2013
Investments in energy efficiency, including a combined heat and power unit
- 2016
Expansion of inspection machine and administration; total area in Bretten now 20,000 m²
- 2019
Opening of the Bacău site (Romania) on 1,600 m²