Special design V-belt pulleys

Customised manufacturing for direct assembly

As a specialised iron foundry focusing on industrial drive technology, we are your expert partner for ready-to-install V-belt pulleys in special designs. We manufacture customised V-belt pulleys in accordance with DIN 2211 / DIN 2217 – in all common profiles such as SPZ, SPA, SPB or SPC – with diameters up to 2,500 mm and unit weights up to 6,000 kg

Thanks to our flexible moulding process, we can respond to your requirements quickly, economically and without model costs. In our own foundry, we manufacture all pulleys to fit perfectly – from one-off production to small series. 

As a complete manufacturer, we take care of the entire production chain – from design and casting to mechanical processing on state-of-the-art CNC machines. 

On our Schenk balancing machines, we ensure that your components are perfectly balanced – on request, also on a contract basis. We also offer various surface treatments, refinements and galvanising to optimally prepare your components for use in industrial environments.

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At a glance

Features

  • 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 pulley weight approx. 6,000 kg
  • Maximum drive power 1,000 kW
 
 

Flexible moulding process | Fast delivery

  • Individual model setups are not required – there are no model costs!
  • Manufactured according to DIN 2211 / DIN 2217
  • Change requests or adaptations can be accommodated without costs
  • Short term production and delivery possible
 
 

Materials

  • Standard: Cast iron with lamellar graphite EN-GJL-200 to EN-GJL-300 (GG-20 to GG-30), DIN EN 1561
  • Alternatively: Ductile iron (EN-GJS-400 to EN-GJS-800) or cast steel (GS), welded steel design or aluminium

Standard-Profiles

  • SPZ, SPA, SPB, SPC
  • XPZ, XPA, XPB, XPC
  • 3V, 5V, 8V
  • 20, 25, 32, 40
  • 10 (Z), 13 (A), 17 (B), 22 (C), 32 (D), 40 (E)

Possible shaft-hub connections

Possible designs

  • Arm, solid or plate pulleys
  • Double arm / double base pulleys
  • Additional stiffening ribs

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 is also possible
 
 
 
 
V-belt pulleys for industrial applications

Further variants

 
 
V-ribbed pulley / Poly-V pulley

V-ribbed pulleys / Poly-V pulleys

In addition to classic V-belt pulleys, we also manufacture ribbed pulleys/Poly-V pulleys (profiles H, J, K, L, M) in special designs according to individual customer specifications. They are ideal solutions for multi-track or particularly compact drive systems.

 
V-belt pulleys as steel/welded construction

V-belt pulleys as steel/welded construction

Since drive elements made of grey cast iron, spheroidal graphite cast iron or cast steel cannot be used in some applications, we also produce drive and flywheels as steel/welded constructions. This design offers increased stability despite its lower mass and is used primarily for large drive wheels with high workloads.

 
 
 
 

Manufacturing process of a V-belt pulley

Thanks to our unique, flexible moulding technology, we are able to produce drive pulleys and other rotationally symmetrical drive elements, such as coupling bodies, flanges or bearing shells, without model costs. For this project, we manufactured a customised V-belt pulley with TaperLock mounting and accompanied the process from the technical drawing to the preparation for dispatch. The pulley, made of grey cast iron (material EN GJL 250), has a diameter of 510 mm and a rim width of 314 mm. The raw weight before mechanical production was 220 kg and the production weight is 150 kg.

 
 

Design, moulding and foundry


Design and work preparation

Design according to customer specifications, technical drawing, creation of the work plan including deadlines

Moulding

    Moulds without exclusive model equipment! Assembling the model with a modular system on a moulding table

    Moulding

    Manufacturing two mould halves

    Moulding

    Adding the moulding sand, mixing with resin and hardener

    Moulding

    Applying mould release agent to half of the mould to optimise the casting surface of the blank

       
       
       
      Moulding

      Composite and clamped mould

      Foundry

      Filling the mould with liquid iron at a temperature of approx. 1,300 °C

      Foundry

      Removing the casting moulds

      Foundry

        Cast blank, already without sprues and risers, on its way to the blasting house

          Beam house

          Blank after blasting, without any sand residue or scale adhering to it

           
           
           

          Mechanical manufacturing


          Cast finish

          Deburring the edges in the finishing department

          Turning

            Pre-turning of the pulley, pre-drilling and grooving of the V-grooves

              Milling and drilling

                Drilling holes and cutting threads to accommodate the TaperLock bushing

                  Milling and drilling

                  V-belt pulley realigned with dial gauge and tapered bore introduced

                  Balancing

                  Balancing in two planes, in accordance with quality grade G 6.3

                   
                   
                   
                  Balancing

                  Attaching counterweights, alternatively drilling opposite holes

                   
                   
                   

                  Quality assurance, painting and preparing for shipping


                  quality control

                    Dimensional inspection of the V-belt pulley, tolerances in accordance with DIN 2211

                    Painting

                    Applying the primer with an electrostatic painting system

                    Corrosion protection

                    Application of wax, corrosion protection for machined surfaces

                    Shipping

                    V-belt pulley sealed in shrink wrap – ready for transport

                     
                     
                     

                    Why Lütgert?

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                    Flexible moulding process without individual models and without model cost

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                    Special designs according to individual customer specifications or drawings

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                    Pulley geometry optimally adapted to the respective drive situation

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                    Individual design, control, recalculation and optimization of your drive

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                    Customised processing (drilling, grooving, surface) acc. to customer specifications

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                    Ideal for prototypes, as well as individual or series parts

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                    Full transparency through creation of released drawings

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                    Documentation of residual imbalances and surface treatments

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                    Documentation to prove material properties, balancing grades and surface treatments

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                    Extensive stock and short-term availability of urgent spare parts

                     

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

                    Phone: +49 52 41 / 74 07 0
                    info@luetgert-antriebe.de
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