Grid pulleys / bar drums

Grid pulleys, also called bar drums, are mainly used as base pulley for bucket elevators and conveyor belts. We manufacture these components in different diameters (355 to 1,000 mm) and crown widths (140 to 500 mm). By combining several grid pulleys on one shaft, which are ball-shaped or spherically shaped, crown widths of over 2,000 mm can also be realised.

The bar-shaped running surface prevents bulk or transported material from getting between the pulley and the belt, where it is crushed and causes the belt to slip. Damage or wear to the drive belt is reduced. All types are manufactured by us as a version with only one stable plate. Deflector cones are therefore not necessary.

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Pre-produced blanks are available up to up to a diameter of 630 mm are available from stock and can be delivered at short notice.   
Pre-produced blanks are available up to up to a diameter of 630 mm are available from stock and can be delivered at short notice.
Several grating pulleys are designed as a unit on a shaft crowned or spherical shape. The multi-part design facilitates assembly 
Several grating pulleys are designed as a unit on a shaft crowned or spherical shape. The multi-part design facilitates assembly
The delivery is also available as a ready-assembled assembly including a precisely fitting shaft to minimise the assembly effort and reduces the costs. 
The delivery is also available as a ready-assembled assembly including a precisely fitting shaft to minimise the assembly effort and reduces the costs.
 

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

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
  • Tread crowned according to DIN 111 or camber height according to requirements
  • Adaptation of the geometry to the respective drive situation
  • Common designs available from stock Flange widths: 140 | 160 | 180 | 200 224 | 250 | 280 300 | 315 | 355 | 400 | 450 | 500 mm
  • Short-term production and delivery possible
  • Delivery as ready-assembled assembly incl. precisely fitting shaft possible

Materials

  • Standard: Cast iron with lamellar graphite EN-GJL-200 to EN-GJL-300 (GG-20 to GG-30), DIN EN 1561

Shaft-hub connection

  • Finish bore with keyway and set screw
  • Prepared for Taper-Lock clamping bush connections

Possible designs

  • Arm or plate disc
  • Reinforced versions for higher belt speeds

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
  • Preservation of the functional surfaces with spray wax/oil
  • Individual surface treatment and special painting possible
 
 
 
 

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
 
 
 

Individual geometry selection due to a high number of variants

Outside- Ø [mm] Number of bars Rim width min [mm] Rim width max [mm]
315 - 140 500
355 18 140 500
400 20 140 500
450 18 140 500
500 18 140 500
520 18 140 500
560 24 140 500
630 30 140 500
710 30 140 500
800 30 140 500
900 36 140 500
1.000 40 140 500

© Copyright Lütgert & Co. GmbH | Friedrichsdorfer Straße 48 | 33335 Gütersloh (Germany) | Phone: +49 52 41 / 74 07 0  info@luetgert-antriebe.de | Sitemap | Legal Notice | Privacy policy | Privacy policy E-mails

 

© 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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