Repair, rewinding and service of electric motors, pumps, fans and frequency inverters since 1911.
Bühler & Sell Elektromotoren GmbH
63069 Offenbach am MainNew on Amplifa
About Bühler & Sell
Bühler & Sell Elektromotoren GmbH is an electrical machine engineering company based in Offenbach am Main in the Rhine-Main region. The company, with around 30 employees, repairs three-phase asynchronous motors, DC motors, servo and PM motors, gearboxes and geared motors, pumps, booster pump systems, fans, blowers, vacuum pumps and compressors – in its own workshop including a winding shop, and also on-site. The workshop services include complete overhauls including rewinding of the stator winding in round or profile wire, mechanical refurbishment through turning, milling, drilling and welding, sandblasting, balancing and painting according to customer requirements. In addition, the company offers sales and service of Danfoss and Vacon frequency inverters, retrofit projects, belt systems, installation, commissioning, maintenance and a 24/7 emergency service. Its main customers come from building technology and facility management, heating, cooling and ventilation technology, water and wastewater technology, as well as industry and the data center sector.
- Site
- Offenbach am Main
- Processes
- Repair of three-phase/asynchronous motors (complete overhaul), Motor rewinding (stator winding round/profile wire), Repair of DC motors, Repair of gearboxes and geared motors, Repair of centrifugal pumps, Repair of fans/blowers, Turning (mechanical refurbishment, e.g. bearing seats), Milling (mechanical refurbishment)
- Materials
- Rewinding (stator winding), Testing per VDE, BAKER surge voltage measurement, Balancing, Vibration measurement, Laser alignment, Sandblasting, Paint finish
- Certificates
- Danfoss DrivePro Partner (Premium Member, certified), Testing per VDE, BAKER surge voltage measurement, Vibration measurement/Bearing diagnostics, ISO 9001
- Founded
- 1911
- Employees
- 30
- Industries
- Building technology/Facility Management, Heating, cooling and ventilation technology, Water and wastewater technology, Swimming pool technology, Industrial applications, Conveying technology
- 01
Consulting and application consulting
- 02
Data collection and fault analysis
- 03
Disassembly and cleaning
- 04
Rewinding or mechanical refurbishment
- 05
Assembly and reassembly
- 06
Testing per VDE
- 07
Test run and commissioning
- 08
Maintenance and inspection
Processes and Services
Rewinding (stator winding)
Renewal of the stator winding in round or profile wire for asynchronous and DC motors.
Testing per VDE
Electrical tests in the company's own test field according to VDE and to customer specifications.
BAKER surge voltage measurement
Winding inspection for fault diagnosis on motor windings.
Balancing
Balancing of rotating components in the workshop and on-site.
Vibration measurement
Vibration acceleration for bearing diagnostics on motors and systems.
Laser alignment
Laser-guided, electronic alignment of belt-driven systems.
Sandblasting
Cleaning of components prior to repair.
Paint finish
Painting of repaired motors like original or according to customer requirements.
Locations
Offenbach am Main
DEHeadquarters with workshop, winding shop, test field and warehouse
- Lot size
- Single systems and repair orders
- Materials
- Electric motors, pumps, fans, gearboxes, frequency inverters
- Test stand for frequency inverters
- Test field (testing per VDE)
- BAKER surge voltage measuring device
- Laser-guided pulley alignment device
- Own vehicle fleet
Components and Drives
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Repair of three-phase/asynchronous motors (complete overhaul)Assembly | – | – | – | – | – |
| Motor rewinding (stator winding round/profile wire)Assembly | – | – | – | – | – |
| Repair of DC motorsAssembly | – | – | – | – | – |
| Repair of gearboxes and geared motorsAssembly | – | – | – | – | – |
| Repair of centrifugal pumpsAssembly | – | – | – | – | – |
| Repair of fans/blowersAssembly | – | – | – | – | – |
| Turning (mechanical refurbishment, e.g. bearing seats)Machining | – | – | – | – | – |
| Milling (mechanical refurbishment)Machining | – | – | – | – | – |
| Drilling (mechanical refurbishment)Machining | – | – | – | – | – |
| Welding (mechanical refurbishment)Joining | – | – | – | – | – |
| Sandblasting (cleaning of components)Surface | – | – | – | – | – |
| Balancing (workshop and on-site)Testing | – | – | – | – | – |
| Vibration measurement / vibration acceleration for bearing diagnosticsTesting | – | – | – | – | – |
| Winding inspection with BAKER surge voltage measurementTesting | – | – | – | – | – |
| Testing per VDE in the test fieldTesting | – | – | – | – | – |
| Paint finish (painting according to customer requirements)Surface | – | – | – | – | – |
| Manufacture of spare parts in own productionMachining | – | – | – | – | – |
| Laser alignment of belt-driven systemsAssembly | – | – | – | – | – |
| Installation of V-belt, flat belt and timing belt systemsAssembly | – | – | – | – | – |
| Retrofit / conversion of drive systemsEngineering | – | – | – | – | – |
| Service, repair, commissioning of Danfoss/Vacon frequency invertersAssembly | – | – | – | – | – |
4 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Test stand for frequency inverters | – | 1 | – | 2004 | Offenbach am Main |
| Test field (testing per VDE) | – | – | – | – | Offenbach am Main |
| BAKER surge voltage measuring device (winding inspection) | BAKER | – | – | – | Offenbach am Main |
| Laser-guided electronic pulley alignment device | – | – | – | – | Offenbach am Main |
Additional services
Reference customers
Quality and Test Technology
Repairs are carried out with incoming inspection, fault analysis and electrical tests per VDE in the company's own test field. Diagnostics use BAKER surge voltage measurement, vibration measurement for bearing diagnostics, and balancing in the workshop and on-site.
| Evidence | Offenbach am Main |
|---|---|
| Testing per VDE | |
| BAKER surge voltage measurement | |
| Vibration measurement/Bearing diagnostics | |
| ISO 9001 |
Company History
- 1911
Founded by Nikolaus Bühler and Albert J. Sell on 01.10.1911 in Frankfurt am Main, Uhlandstraße 11.
- 1967
Renamed Bühler und Sell Elektromotoren KG and relocated to Vilbeler Landstraße 7, Frankfurt.
- 1999
Frank Hill takes over management; relocation to Offenbach am Main, Sprendlinger Landstraße 180.
- 2004
Start of the system partnership with Danfoss; construction of a test stand for frequency inverters.
- 2011
100th company anniversary.
- 2017
Bianca Vodopija and Marc Jost take over the company from Frank Hill; conversion into a GmbH (limited liability company).
- 2019
Appointed Danfoss Advanced DrivePro Partner.
- 2020
Certification as a Danfoss DrivePro Partner; rated Premium Member in the Danfoss Drives Partner Excellence Program.
- 2021
110th company anniversary.