Development and manufacturing of planetary gears, rope winches, slew and swing drives as well as travel drives for heavy-duty applications.
Siebenhaar Antriebstechnik GmbH
Hofgeismar (DE) · Made (NL) · West Bend, WI (US) · Tianjin (CN) · Moscow (RU)New on Amplifa
About Siebenhaar Antriebstechnik
Siebenhaar Antriebstechnik GmbH in Hofgeismar develops, manufactures and assembles planetary gears, rope winches, free-fall winches, slew and swing drive gears, travel drives, safety brakes and customer-specific special gears. Around 25 engineers, designers and product designers carry out the design work from concept to manufacturing drawing, supported by gear design software, 3D construction and finite element analysis. The high level of vertical integration includes in-house machining of all torque-transmitting parts made of steel and cast iron, gear manufacturing by gear shaping, gear hobbing and gear grinding, heat treatment, assembly as well as painting according to customer requirements or standards such as NORSOK. Customers come from construction machinery/mining, crane construction, marine and offshore, shipbuilding, port technology, tunnelling, energy, chemicals, the cement industry and open-cast mining technology. The family-owned company, founded in 1965 and employing 200 people, supplies applications worldwide and additionally offers repair, conversion, performance testing and on-site service.
- Site
- Hofgeismar
- Processes
- Machining (turning, milling, drilling) of torque-transmitting parts, Gear manufacturing (gear shaping, gear hobbing, gear grinding), Hardening of pinions (hardened pinions), Grinding of pinions (pinions ground on request), Assembly of gears and winches (customer-specific assembly, test runs, spooling of rope drums), Painting according to customer requirements or standard norms (e.g. NORSOK), Manufacture of rope drums (cast or welded, without grooving, normal grooving or, Repair, reconditioning, conversion and modification of gears (e.g. ratio changes)
- Materials
- Steel, Cast Iron, Metals
- Certificates
- ISO 9001:2015, TOP 100 – The Innovative SME, ISO 9001:2015 (DNV, cert. no. 10000406327-MSC-RvA-DEU)
- Founded
- 1965
- Employees
- 200
- Industries
- Construction Machinery/Mining, Mobile and Construction Cranes, Marine and Offshore, Shipbuilding, Port Technology, Power Generation and Chemical Plants
- 01
Design & Development
- 02
Purchasing/Incoming Goods
- 03
Machining
- 04
Gear Manufacturing
- 05
Heat Treatment
- 06
Assembly & Test Runs
- 07
Painting
- 08
Shipping & Service
Materials & Processes
Steel
Main material for torque-transmitting parts, gears and pinions, also processed as cast iron.
Cast Iron
Processed in the company's own certified machining operation (FTH), among other things for gear components and rope drums.
Sites
Hofgeismar (Max-Eyth-Straße 5)
DEHeadquarters, Development, Manufacturing, Sales
- Part weight / size
- Output torques up to 7,500,000 Nm (static)
- Materials
- Steel, Cast Iron
- 2 gear skiving machines Liebherr LK 500
- Computer-controlled lathes
- Milling machines
- Machining centres
- Gear shaping machines
- Gear hobbing machines
- Gear grinding machines
- Measuring machines with 3D scanning function
- Computer-controlled paternoster system
- Paint shop
Hofgeismar (Assendorfer Weg 3)
DEManufacturing site FTH Fertigungstechnik Hofgeismar GmbH
- Materials
- Metals, Steel, Cast Iron
- Machining: milling, turning, drilling
Made
NLSales office BeNeLux
West Bend, WI
USSales Representative
Tianjin
CNSiebenhaar Transmission Technology
Moscow
RUSales office Siebenhaar Russia
Products & Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Machining (turning, milling, drilling) of torque-transmitting partsMachining | – | – | – | – | Metals, Steel, Cast Iron |
| Gear manufacturing (gear shaping, gear hobbing, gear grinding)Machining | – | – | – | – | Steel |
| Hardening of pinions (hardened pinions)Heat Treatment | – | – | – | – | Steel |
| Grinding of pinions (pinions ground on request)Machining | – | – | – | – | Steel |
| Assembly of gears and winches (customer-specific assembly, test runs, spooling of rope drums)Assembly | – | – | – | – | – |
| Painting according to customer requirements or standard norms (e.g. NORSOK)Surface | – | – | – | – | – |
| Manufacture of rope drums (cast or welded, without grooving, normal grooving orCasting | – | – | – | – | – |
| Repair, reconditioning, conversion and modification of gears (e.g. ratio changes)Engineering | – | – | – | – | – |
| Performance testing of gearsTesting | – | – | – | – | – |
| Oil analysesTesting | – | – | – | – | – |
| Design and development of drive solutions (3D construction, gear design,Engineering | – | – | – | – | – |
| Measurement with modern measuring machines, some with 3D scanning function (process control)Testing | – | – | – | – | – |
10 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Gear skiving machine | Liebherr LK 500 | 2 | – | – | Hofgeismar |
| computer-controlled lathes | – | – | – | – | Hofgeismar |
| milling machines | – | – | – | – | Hofgeismar |
| machining centres | – | – | – | – | Hofgeismar |
| gear shaping machines | – | – | – | – | Hofgeismar |
| gear hobbing machines | – | – | – | – | Hofgeismar |
| gear grinding machines | – | – | – | – | Hofgeismar |
| measuring machines (some with 3D scanning function) | – | – | – | – | Hofgeismar |
| computer-controlled paternoster system | – | – | – | – | Hofgeismar |
| paint shop | – | – | – | – | Hofgeismar |
Additional services
Reference customers
Quality & Certification
Several modern measuring machines, some with 3D scanning function, ensure process control; individually agreed test runs and acceptance inspections by classification societies such as ABS, DNV-GL and Lloyd's Register are possible.
| Evidence | Hofgeismar | Hofgeismar (FTH) |
|---|---|---|
| ISO 9001:2015 (DNV, cert. no. 10000406327-MSC-RvA-DEU) | ||
| TOP 100 – The Innovative SME |
Company History
- 1965
Founded by Dipl.-Ing. Ted Siebenhaar; pioneer in introducing planetary gears into rope winches.
- 1986
Sale of Siebenhaar to the Krupp Group.
- 1989
Sale by Krupp to Dr. Jamshid Yektai.
- 1990
New beginning as an independent family-owned company with around 30 employees and annual revenue of DM 5 million.
- 1998
First certification according to ISO 9001 (05.10.1998).
- 2008
Expansion of the leading market position; start of an investment and growth phase.
- 2010
Headcount rises to 200; revenue more than fifteen-fold compared to 1990.
- 2015
50th company anniversary.