Split pulleys and clamping hubs

The optimal facilitation for assembly and disassembly

In many cases the whole drive with all components needs to be elaborately dismantled and afterwards reinstalled when exchanging or replacing drive pulleys. To simplify this process we offer split pulleys which can be disassembled in two halves and perfectly put together again at the shaft.

We produce all sorts of split pulleys (v-belt pulleys, flat belt pulleys, band wheels etc.) as exclusive custom-made products. Depending on the requirement the pulley will be implemented as arm or plate pulley.

All geometries can be easily produced in a flexible, model-free moulding process. Split pulleys are produced from batch sizes larger than 1 piece for urgently needed spare parts , prototypes, zero-series models or series according to individual requests or drawings. In close cooperation with the customer we develop the optimal solution for individual drives.

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To produce split pulleys, the raw casting is blasted into two halves in a controlled manner - using predetermined breaking points - and immediately rejoined and fixed. The structure of the grey cast iron, which hardly deforms elastically at all before breaking, is used to achieve a perfect fit at the breaking point for seamless rejoining. Designs in alternative materials (ductile iron, steel, aluminium) are NOT possible.

Many decades of experience in casting with a predetermined breaking point, blasting and subsequent mechanical processing of the split discs result in a customised, highly sophisticated drive unit.


Clamping hubs

Drive pulleys with clamping hubs are characterised by their relatively easy installation on the shaft. Thanks to the slotted design, they can be quickly and easily fitted to the shaft, adjusted and clamped / fixed in the optimum position. They are secured axially using cylinder or hexagon head screws. Fastening elements such as bushes or clamping sets are no longer required, reducing the assembly effort. The tolerances of the shaft bores in clamping hubs always correspond to an interference fit. Clamping hubs can also be supplied with a keyway for transmitting very high torques. Dismantling is also made easier and fretting corrosion is no longer a problem.


At a glance


  • Special production according to customers individual specifications or drawings
  • Standard for peripheral speeds up to 30 m/s
  • Maximum pulley diameter 2,500 mm
  • Maximum pulley weight approx. 6,000 kg

Flexible moulding process | Fast delivery

  • Individual model setups are not required – there are no model costs!
  • Produced on the basis of DIN 2211 / 2217 or individually deviating
  • 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

Shaft-hub connection

  • Cylindrical bore with or without keyway, tolerance zone for interference fits.
  • Also, version with clamping hub only (only the hub is split, not the rim)
  • Prepared to accept couplings, flanges or brake discs

Possible versions

  • V-belt pulleys, flat belt pulleys, toothed belt and toothed pulleys, belt drums.
  • All common flat and V-belt profiles: SPZ, SPA, SPB, SPC, 20, 25, 32, 40, 3V, 5V, 8V, Poly-V etc., all V-belt special profiles
  • Arm or base pulley

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
  • Processed functional surfaces are preserved with spray wax / oils

Why Lütgert?

  • 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

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© Copyright Lütgert & Co. GmbH
Friedrichsdorfer Straße 48
33335 Gütersloh

Phone: +49 52 41 / 74 07 0
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