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Steel / welded constructions

For decades, we have established ourselves on the market as a reliable manufacturer and supplier of rotationally symmetrical drive components made of durable cast iron. Our product range includes standard pulleys available from stock as well as customised pulleys for special customer requirements.

With our flexible and economical moulding process, we are able to meet almost all requirements in terms of geometry and shape. As a rule, individual pattern equipment is not necessary. This means that there are no additional model costs for our customised cast iron products.

Since in some applications it is not possible to use drive elements made of grey, spheroidal or cast steel, we also produce drive and flywheel pulleys as steel/welded constructions. These are either manufactured from standardised semi-finished steel products or adapted to individual wishes and requirements as customised special pulleys. Steel/welded constructions are better due to their increased stability despite their lower mass and are mainly used for large drive pulleys with high working loads.

Our V-belt, flat belt and flywheel pulleys are characterised by high quality, functionality, sustainability and durability.

Downloads

Steel / welded constructions(1239 KB)

Accessories

Industrial belts

Measurement

TaperLock bushes

Features

Special production according to customers individual specifications or drawings
Maximum pulley diameter 2,500 mm
Maximum pulley weight approx. 6,000 kg

Flexible moulding process | Fast delivery

Production according to DIN 2211 / DIN 2217
Designed according to moment of inertia or moment of swing
Short term production and delivery possible

Materials

All common, weldable materials

Shaft-hub connection

Ready drilled with groove and set screw
Prepared for clamping sets or Taper-Lock bushing

Possible designs

V-belt, flat belt and flywheel pulleys

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

Why Lütgert?

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...) acc. to customer specifications

Documentation of residual imbalances and surface treatments

Documentation to prove material properties, balancing grades and surface treatments

Full transparency through creation of released drawings

Ideal for prototypes, as well as individual or series parts

Frequently Asked Questions (FAQ)

When is a drive pulley made of steel or a welded construction a better choice than one made of grey cast iron?

Steel and welded structures are typically used for large disc diameters, high torques or drives subject to high dynamic loads. They offer greater structural strength whilst reducing mass, and are particularly suitable where grey cast iron reaches its limits due to load, geometry or operating conditions.

Which technical standards and design principles are taken into account in steel and welded structures?

The design is generally carried out in accordance with current standards such as DIN 2211 / DIN 2217. In addition, the dimensions may be determined on the basis of moments of inertia in order to optimally meet the requirements for smooth running, start-up behaviour and energy storage within the system.

What types of connections and shaft-hub joints are possible in steel/welded structures?

Depending on the application, various connection options are available, e.g. pre-drilled hubs with keyways and threaded locking mechanisms, as well as versions for Taper-Lock sleeves or clamping sets. This allows for flexible integration into existing drive systems.

Can steel and welded structures be manufactured to customer-specific drawings?

Production is always carried out in accordance with individual customer drawings or specifications. Geometry, drilling patterns, shaft connections, choice of material and surface treatment can be designed and implemented to suit specific projects – even for one-off items or prototypes.

Which manufacturing and quality characteristics are verified?

The components are manufactured, including mechanical machining. This includes, amongst other things, balancing in accordance with standard quality grades (e.g. DIN 21940), documentation of material properties, surface treatment and, optionally, test and acceptance reports.

What are the typical applications for steel and welded structures in the drive sector?

Typical applications include conveyor systems, crushing equipment, pump and compressor drives, and systems with high moments of inertia or large pulleys. These designs are used particularly in applications where a high level of operational reliability and adaptability are required.

Balancing according to DIN 21940 standard quality G16

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