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.

Downloads

Split pulleys(1116 KB)

Accessories

Industrial belts / Timing belts

Belt and chain tensioner

Measurement

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.

Arm pulley split on one side, clamping hub centred

At a glance

Features

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

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

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