Balancing FLUDEX couplings

In deviation from the balancing specifications in catalog section 2, all FLUDEX couplings complying with DIN ISO 1940 are balanced to balancing quality G6.3 for 1800 rpm. For operating speeds higher than 1800 rpm micro-balancing, based on operating speed, can be requested (order code +W03 required).

Balancing is a two-level balancing with the specified oil quantity or a 75 % filling.

FLUDEX couplings are balanced in accordance with the half parallel key standard. Other balancing standards must be specified in the order, using the product code key (see catalog section 2).

Add-on couplings are subject to the standards as set out in catalog section 2.

Oil filling

FLUDEX couplings can be delivered with or without oil filling.

• Delivery without oil filling:
  without order code
• Delivery with oil filling:
  product code with -Z and order code F16 and Y90 with plain text specification of the oil filling quantity in liters.
• Delivery without oil filling but with oil filling quantity specification: Product code with -Z and order code Y90 with plain text specification of the oil filling quantity in liters.

Hollow shafts of the FA, FG and FV series

Variant of FLUDEX hollow shafts only with finished bore:
Order code for bore diameter is required.

Operating temperature range of FLUDEX couplings

FLUDEX couplings are suitable for ambient temperatures of between -40 °C and +40 °C. For use at temperatures below -15 °C, FLUDEX couplings are generally delivered without oil filling. For the selection of the operating oil for low temperatures, attention must be paid to a sufficient low freezing point of the oil and his compatibility to sealing elements. The temperature limits of the N-EUPEX add-on coupling are shown in part 7 of this cataloge. If other displacement coupling are combinded with a FLUDEX coupling, their respective temperature limits must be taken into account.

Operating conditions for FLUDEX couplings in potentially explosive environments

The coupling with fusible safety plugs with identity marking

T3 is suitable for the operating conditions set out in Directive 94/9/EC:

• Equipment group II (above-ground applications) temperature class T3 of categories 2 and 3 for environments where there are potentially explosive gas, vapors, mist and air mixtures and for environments where dust can form potentially explosive atmospheres.
• Equipment group I (below-ground applications) of category M2

If used in potentially explosive environments under ground, aluminum couplings must be provided with a robust enclo­sure to preclude the risk of ignition caused by e.g. friction, impact or friction sparks. The deposit of heavy-metal oxides (rust) on the coupling housing must be prevented by the enclosure or other suitable means.

FLUDEX couplings can be delivered with fitted brake disk or V-belt pulley. Designing the belt drive or the brake disk to conform with the guidelines is the responsibility of the subassembly supplier. It should be noted that there is a risk from, amongst other things, electrostatic charges and hot surfaces. Under BGR 132 (regulations of German Institute for Occupational Safety) the use of V-belts in conjunction with IIC gases is not permitted.

Axial retention

Axial retention is provided by a set screw or end washer with a retaining screw for shaft ends to DIN 748/1 with a centering thread to DIN 332/2. Other methods must be specified in the order, using the product code with -Z and order code Y99 with plain text specification, unless ordering options are available.

Bore and keyway width tolerances are specified in catalog section 15.

Weights specified in the dimension order tables apply to maximum bore diameters without oil filling.