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Boisset & Cie BC SA becomes BCSA GEAR

9 April 2018
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The continuity is there for BCSA GEAR celebrating its 20 years.

M. Boisset hand over to M. Montillet

Left to right, Mr David Montillet and Mr Jacques Boisset

Indeed it was in 1998 when Mr Jacques Boisset took over MAAG France activities establishing Boisset & Cie BC SA. At BCSA GEAR everything accelerates and the last months were eventful.

Last June Boisset & Cie BC SA becomes BCSA GEAR, and the company changes hands. Thus it is with a lot of emotions that Mr Jacques Boisset is getting a well-deserved retirement and hands over the company to Mr David Montillet and Mr Christophe Boisset. Indeed the previous CEO made the choice of a continuity for the company keeping all activities, its organization and dynamism. A page turns but the BCSA GEAR story continues.

Gearbox for balancing machines, 20 000rpm 4 050Nm

7 March 2018
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This is our last gearbox for balancing machines just getting out of our workshop. This speed increaser allows a gear shifting between the coaxial shafts. Thus on the second gear we reach a 10/1 ratio between LS and HS shafts. As the previous balancing machine gearboxes, it is designed to work in a vacuum chamber.

Gearbox for balancing machines




  • Power : 350 kW
  • Input speed :2 000 tr/min
  • Output speed : 7 500/20 000 tr/min
  • Maximum torque : 4 050 Nm
  • Weight : 1 780 Kg


Automotive Testing Expo Europe 2018

26 February 2018
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Image Automotive Testing Expo 2018

Meet us in Germany in Stuttgart on June 5th, 6th and 7th for the Automotive Testing Expo Europe 2018.

We will be presenting in particular the speed increasers we design for formula 1 with the ERS systems: MGU-K (formerly KERS) and MGU-H.

We will also tell you more about our T-shape gearboxes. They allow to similate axle loads and are mainly used on engine test benches.

Our team will be at the booth number 1054 to answer all your questions about our products and help you in your projects.
In the meantime feel free to ask your questions online with this form or by calling us at this number +33 (0)4 72 14 69 00.

Speed increaser for plane turbine balancing machine, 10MW 6,500 rpm

6 January 2017
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BCSA GEAR has designed a high power speed increaser for turbine balancing machine.
This gearbox permits a choice between 3 different output speeds on the same HS shaft.
The step by step rotation of the turbine is possible thanks to an embedded auxiliary drive.

  • Power : 10 MW
  • Input Speed : 1,800 rpm
  • Output Speed: 2,250/4,500/6,500 rpm
  • Maximum Torque : 115,0000 Nm
  • Weight : 17 tons


Gearbox for turbine balancing machine
Gearbox for turbine balancing machine

Test bench for helicopter transmission gearbox, 57,500Nm

6 January 2017
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BCSA GEAR was involved in the realization of a test bench for a helicopter main transmission gearbox (MGB). We provided for an integrator different mechanical components including, the reducers, the speed increaser, the mast force sytem and the couplings.

This bench allows to simulate rotation force and also every forces applied to the mast. The rig permits a maximum torque of 57,000 Nm on the rotor mast at 365 rpm. The loading system is composed of two 2,100W electrical motors. This test bench includes also a rear rotor loaded on the same way.