Manufacturer and machiner of rolls for food, animal feed, battery foils, rubber/plastics and paper.
Leonhard Breitenbach GmbH
Siegen-Trupbach (Walzenweg 60) · Siegen (Walzenweg 81) · Siegen (Walzenweg 79)New on Amplifa
Roll manufacturer with tradition since 1866
Leonhard Breitenbach GmbH is a roll manufacturer and roll service provider founded in 1866 and based in Siegen-Trupbach. The company manufactures rolls such as calender rolls, mixing rolls, thermo rolls, grooved rolls, smooth rolls and crinkling rolls, refiner rolls, coating and application rolls as well as pistons for hydraulic presses. Production includes an in-house roll foundry with static casting (chilled cast iron, grey cast iron, static casting, steel composite casting) and horizontal centrifugal casting for smaller rolls, forged steel machining and steel welded constructions as well as coating with chrome or WC/Co. The contract machining offering covers deep hole drilling up to 12 m drilling length, rough turning, finish turning, grinding and milling of large rotationally symmetrical workpieces up to 10 m in length and 80 t in weight with precision down to 0.001 mm. Customers come from the food, animal feed, battery foil, rubber and plastics, and paper industries as well as mechanical engineering. With sales representatives, the company is represented in more than 35 countries.
- Site
- Siegen
- Processes
- Deep hole drilling, Rough turning, Finish turning, Turning, Grinding, Milling, Static casting (chilled cast iron, grey cast iron), Horizontal centrifugal casting process
- Materials
- Chilled cast iron Tuk 00 – Tuk 30, Chilled cast iron TF 110, Static casting TR 100 – TR 120, Indefinite chill TM 100 – TM 220, Grey cast iron, 42CrMo4, 34CrNiMo6, 30CrNiMo8
- Certificates
- DIN EN ISO 9001:2015, ISO 9001
- Founded
- 1866
- Industries
- Food industry, Animal feed industry, Battery foil industry, Rubber and plastics industry, Paper industry, Oil milling/cereals
- 01
Design, dimensioning and optimization (CAD/CAM)
- 02
In-house casting: static casting and horizontal centrifugal casting process
- 03
Heat treatment / forged steel and steel welded constructions
- 04
Rough turning, finish turning, deep hole drilling, milling
- 05
Grinding and honing (runout in the micrometer range)
- 06
Coating (chrome, WC/Co)
- 07
Assembly and roll service/refurbishment
Locations and machinery
Siegen-Trupbach
DEHeadquarters, production, foundry
- Part weight / size
- Workpieces up to 10 m length, 80 t; casting approx. 12 t
- Lot size
- Single-part and small-series production
- Materials
- Chilled cast iron, grey cast iron, static casting, forged steel, aluminium casting, non-ferrous metals
- 4 CNC roll grinding machines (up to Ø 2,500 x 15,000 mm)
- 2 5-axis machining centers (2007, 2019)
- 5-axis CNC large turning machine Ø 1,680 x 15,000 mm (2014)
- CNC roll lathe
- Honing machine
- Heavy-duty lathe and large roll lathe
- Boring and milling machine
- 2 peripheral drilling machines
- Deep hole drilling machine (drilling lengths up to 12 m, 2022)
- Rough turning lathe M04 (2024)
- 2 grinding machines M33/M34
- Foundry: 2 flame furnaces approx. 12 t, 2 cupola furnaces of 3.5 t each
- Machining center for surface contours of grooved and crinkle rolls
- Lathe for journal machining
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Deep hole drillingMachining | tight tolerances (drilling lengths up to 12 m, both sides) | 12 m | 80 t | – | Cast, Steel |
| Rough turningMachining | – | 10 m | 80 t | – | Standard and special steels, Non-ferrous metals, Cast |
| Finish turningMachining | down to 0.001 mm | 10 m (internal contours up to 4,200 mm | 80 t | – | Standard and special steels, Non-ferrous metals, Cast |
| TurningMachining | – | 10 m | 80 t | – | Standard and special steels, Non-ferrous metals, Cast |
| GrindingMachining | runout in the micrometer range · Ra ≤ 0.02 mm (calender rolls) | 15,000 mm (grinding machine Ø 2,500 x × Ø 2,500 mm | – | – | Steel, Cast |
| MillingMachining | down to 0.001 mm | 10 m | 80 t | – | Standard and special steels, Non-ferrous metals, Cast (incl. aluminium), Steel construction components, Forged parts |
| Static casting (chilled cast iron, grey cast iron)Casting | – | – | approx. 12 t casting weight | – | Chilled cast iron, Grey cast iron |
| Horizontal centrifugal casting processCasting | – | – | – | – | Chilled cast iron, Grey cast iron |
| Steel welded constructionsJoining | – | – | – | – | Steel |
| Roll coatingSurface | – | – | – | – | Chrome, WC/Co |
| Honing machine machining / honingMachining | – | – | – | – | – |
| Design, dimensioning and optimization of rollsEngineering | – | – | – | – | – |
| Roll service / refurbishment (recoating, regrinding, repairs)Surface | – | – | – | – | Chilled cast iron, Grey cast iron, Forged steel |
| Assembly of turned and milled parts as well as mechanical assembliesAssembly | – | – | – | – | – |
15 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| CNC roll grinding machine | – | 4 | Ø 2,000 x 8,000 mm; Ø 1,100 x 9,000 mm; Ø 600 x 5,000 mm; Ø 2,500 x 15,000 mm | – | Siegen-Trupbach |
| 5-axis machining center | – | 2 | – | 2007 / 201 | Siegen-Trupbach |
| Machining center for creating surface contours of grooved and crinkle rolls | – | 1 | – | 2011 | Siegen-Trupbach |
| 5-axis CNC large turning machine with drilling unit and driven tools | – | 1 | Ø 1,680 x 15,000 mm | 2014 | Siegen-Trupbach |
| CNC roll lathe | – | 1 | – | 2008/2009 | Siegen-Trupbach |
| Honing machine | – | 1 | – | 2008/2009 | Siegen-Trupbach |
| Heavy-duty lathe | – | 1 | – | 1995-1998 | Siegen-Trupbach |
| Large roll lathe | – | 1 | – | 1995-1998 | Siegen-Trupbach |
| Boring and milling machine | – | 1 | – | 1995-1998 | Siegen-Trupbach |
| Peripheral drilling machine | – | 2 | – | 1995-1998 | Siegen-Trupbach |
| Lathe for journal machining | – | 1 | – | 2014 | Siegen-Trupbach |
| Deep hole drilling machine | – | 1 | Drilling lengths up to 12 m | 2022 | Siegen-Trupbach |
| Rough turning lathe | M04 | 1 | – | 2024 | Siegen-Trupbach |
| Grinding machine | M33 / M34 | 2 | – | 2023/2024 | Siegen-Trupbach |
| Foundry (static casting, 2 flame furnaces approx. 12 t, 2 cupola furnaces of 3.5 t each) | – | – | Casting weight approx. 12 t | 1909 | Siegen-Trupbach |
Additional services
Quality
The quality management system is certified to DIN EN ISO 9001:2015 (certificate 210662). Extensive monitoring and measuring procedures, an integrated tool management system and uniform control concepts ensure dimensional and form accuracy down to 0.001 mm as well as runout in the micrometer range.
| Evidence | Siegen-Trupbach |
|---|---|
| ISO 9001 |
History
- 1866
Takeover of the Trupbach ironworks and the grinding and turning works by the Breitenbach brothers
- 1888
Entry in the Siegen commercial register as oHG Leonhard Breitenbach
- 1909
Construction of the in-house roll foundry
- 1947
Resumption of operations after the Second World War with 15 employees
- 1974
Split into Breitenbach Co. KG (ownership) and Leonhard Breitenbach Walzengießerei und Dreherei GmbH (operations)
- 1980/81
New production hall built for the first large CNC roll grinding machine Ø 2,000 x 8,000 mm
- 2001/2002
Expansion of the company premises by 3,000 m² (Walzenweg 81)
- 2007
Expansion by 2,580 m² (Walzenweg 79), first 5-axis machining center
- 2014
5-axis CNC large turning machine Ø 1,680 x 15,000 mm commissioned
- 2016
150th company anniversary
- 2022
Deep hole drilling machine for drilling up to 12 m length commissioned
- 2024
New rough turning lathe M04 installed, grinding machine M33 overhauled
- 2025
New filter system for the foundry and new facade for the foundry tower
- 2026
160th company anniversary