With over 100 years of experience in the design and manufacture of belt drives, we are a powerful partner for your drive solution. We manufacture individual flywheels in all common profiles up to a diameter of 2,500 mm.

We manufacture flywheels for machines that require high torque and great power delivery. Flywheel masses and moments of inertia are adapted to the respective drive situation.

The production of individual geometries according to specifications or drawings - including drilling patterns for flanges, couplings, brake discs or counterweights - is a matter of course for us. All geometries can be easily manufactured using a flexible, model-less molding process.


From a lot size of 1 piece - for urgent spare parts, prototypes, pilot series models or small series - flywheels we can produce for you according to customer specifications or drawings with the highest precision. The best solution for individual drives is developed in close cooperation with the customer. The design is also possible in alternative materials (EN-GJS, steel, aluminum, plastic, etc. without any problems.


Flywheel with cylindrical bore


Flywheel with V-grooves


Flywheel with counterweight


Flywheel with arms


At a glance


  • Special production according to customers individual specifications or drawings
  • Standard for peripheral speeds up to 42 m/s 
  • Maximum pulley diameter 2,500 mm
  • Maximum crown width 750 mm 
  • Maximum pulley weight approx. 6,000 kg

Flexible moulding process | Fast delivery

  • Individual model setups are not required – there are no model costs!
  • Change requests or adaptations can be accommodated without costs
  • Short term production and delivery possible


  • Standard: Cast iron with lamellar graphite EN-GJL-200 to EN-GJL-300 (GG-20 to GG-30), DIN EN 1561 
  • Alternative: Nodular cast iron (EN-GJS-400 to EN-GJS-700), cast steel (GS) or welded steel design

Shaft-hub connection

  • Cylindrical bore, with and without keyway
  • Prepared for couplings, flanges, clamping sets or Taper-Lock clamping bush connections

Possible designs

  • Arm, plate or solid pulley.
  • Double arm / double bottom pulley with stiffening ribs
  • Integrated V-grooves for all belt profiles
  • Two-piece drive pulley 
  • Steel / welded constructions

Balancing standards

  • Standard according to DIN 21940-11 in quality grade G16
  • Available in quality grades G6.3 or G2.5 on request

Surface treatment

  • Primed / black oxide finish as standard
  • Individual surface treatment and special painting possible


  • Flexible moulding process without individual models and without model cost
  • Special designs according to individual customer specifications or drawings
  • Pulley geometry optimally adapted to the respective drive situation
  • Individual design, control, recalculation and optimization of your drive
  • Individual machining (drilling, grooving, surface treatment...) according to customer specifications
  • Documentation of residual imbalances and surface treatments
  • Detailed documentation to prove material properties, balancing grades and surface treatments possible
  • Full transparency through creation of released drawings
  • Ideal for prototypes, as well as individual or series parts
  • Short-term availability of urgent spare parts during machine downtime
  • Extensive stock

Flohr Industrietechnik GmbH - Im Unteren Tal 1 - D-79761 Waldshut-Tiengen - Phone: +49 (0)7751 / 8731-0 -

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