Selection of the coupling series

Обзор

The coupling series is frequently determined by the driven machine and the design of the drive train. Common selection criteria are listed below and assigned to coupling properties, which are used to select the coupling series. Additionally, the price of the coupling and availability are important criteria for determining the coupling series to be used.

The FLUDEX series operates positively and transmits the torque with the aid of a flowing oil or water filling. FLUDEX couplings are used to reduce starting and/or overload torques. During starting, the motor may, for example, run up within a very short time; because of the FLUDEX coupling, the drive train with the driven machine may accelerate after a delay and without increased torque load.

The FLUDEX coupling cannot compensate for shaft misalignment and is therefore designed in combination with a displacement coupling, a cardan shaft or a belt drive. The displacement coupling may be selected in accordance with the criteria described below.

Selection criterion		ZAPEX	ARPEX	N-EUPEX	N-EUPEX DS	RUPEX	BIPEX	ELPEX-B	ELPEX-S	ELPEX
Torque range	Rated coupling torqueT_KN in Nm	850 ... 7200000	92 ... 1450000	19 ... 62000	19 ... 21200	200 ... 1300000	13.5 ... 3700	24 ... 14500	330 ... 63000	1600 ... 90000
Speed range	Peripheral speed vmax = DA · n_max/19100	60	100	36	36	60	36	35	66	60
Torque load	uniform	✓	✓	✓	✓	✓	✓	✓	✓	✓
	non uniform	✓	✓	✓	✓	✓	☺	✓	✓	✓
	rough	✓	✓	–	–	✓	–	✓	✓	✓
	very rough	✓	✓	–	–	–	–	✓	✓	✓
Installation and alignment	Rigid installation, well aligned	✓	✓	✓	✓	✓	✓	✓	✓	✓
	Rigid installation, roughly aligned	✓	✓	–	–	–	–	✓	–	✓
	Flexible installation	✓	✓	–	–	–	–	✓	–	☺
Torsional stiffness	Torsionally rigid	✓	✓	–	–	–	–	–	–	–
	Torsionally flexible	–	☺	✓	✓	✓	✓	–	–	–
	Highly flexible	–	–	–	–	–	–	✓	✓	✓
Torque transmission	Free of torsional backlash	–	✓	–	–	☺	–	✓	–	✓
	Low torsional backlash	✓	–	–	–	✓	✓	–	✓	–
	Overload withstand capability	✓	✓	✓	–	✓	✓	–	☺	✓
Assembly	Plug-in assembly	☺	–	✓	✓	✓	✓	–	✓	–
Assembly	with Taper clamping bushes	–	☺	☺	–	–	✓	✓	✓	–
Maintenance	Wear parts easily dismountable	✓	✓	✓	✓	✓	–	✓	✓	✓
	Maintenance-free	–	✓	–	☺	–	–	–	–	–
	Low-maintenance - interval 1 year	✓	–	✓	✓	✓	✓	✓	✓	✓
Environment	ATEX 94/9/EC Approval	✓	✓	✓	✓	✓	–	–	✓	–
	Operating temperature range	–20 ... +80 °C	–40 ... +280 °C	–50 ... +100 °C	–30 ... +80 °C	–50 ... +100 °C	–30 ... +80 °C	–50 ... +70 °C	–40 ... +120 °C	–40 ... +80 °C
	Chemically aggressive	☺	☺	☺	☺	☺	☺	☺	☺	☺
Coupling material	Cast iron	–	–	✓	✓	✓	✓	✓	✓	✓
	Steel	✓	✓	–	–	✓	–	✓	✓	✓
	Stainless steel	–	☺	–	–	☺	–	☺	–	–
Add-on parts / types	Adapter	✓	✓	✓	✓	☺	–	✓	☺	☺
	Brake disk	✓	☺	✓	–	✓	–	☺	☺	☺
	Brake drum	✓	☺	✓	–	✓	–	☺	☺	☺
	Axial backlash limiter	✓	✓	–	–	☺	–	–	☺	☺
	Shiftgear	✓	☺	–	–	☺	–	–	☺	☺
	Flange type	☺	✓	✓	–	✓	–	☺	✓	✓
	Flange to SAE J620d	☺	☺	☺	–	☺	–	☺	✓	✓

✓ Standard

☺ On request

– Not possible

Typical coupling solutions for different example applications

The specified application factors are recommendations; regulations, rules and practical experience take priority as assessment criteria.

No application factor need be taken into account with FLUDEX couplings. In the case of highly flexible couplings of the ELPEX, ELPEX-S and ELPEX-B series, deviating application factors are stated in the product descriptions.

Example applications	Application factor FB	FLUDEX	ZAPEX	ARPEX	N-EUPEX	RUPEX	BIPEX	ELPEX-B	ELPEX-S	ELPEX
Electric motor without gear unit
Centrifugal pumps	1.0 ... 1.5	☺	☺	☺	☺	❑	❑	☺	–	–
Piston pumps	1.5 ... 2.0	☺	☺	☺	–	❑	–	☺	☺	☺
Vacuum pumps	1.5 ... 1.75	☺	☺	☺	❑	❑	–	☺	☺	☺
Fans with T_N < 75 Nm	1.5 ... 1.75	☺	❑	☺	☺	❑	–	☺	❑	❑
Fans with T_N 75 ... 750 Nm	1.75 ... 2.0	☺	❑	☺	☺	☺	–	☺	❑	❑
Fans with T_N > 750 Nm	1.75 ... 2.0	☺	❑	☺	❑	☺	–	☺	❑	❑
Blowers	1.5 ... 2.0	☺	❑	☺	☺	☺	–	☺	❑	❑
Frequency converters / generators	1.25 ... 1.75	☺	❑	☺	❑	☺	–	☺	–	❑
Reciprocating compressors	1.75 ... 2.5	☺	❑	☺	–	❑	–	☺	☺	☺
Screw-type compressors	1.5 ... 1.75	❑	❑	☺	❑	☺	–	☺	☺	☺
Internal-combustion engine without gear unit
Generators	1.75 ... 2.5	☺	–	–	❑	❑	–	☺	☺	☺
Pumps	1.5 ... 1.75	☺	–	❑	☺	❑	–	❑	☺	☺
Fans	1.75 ... 2.5	☺	–	❑	–	❑	–	❑	☺	☺
Hydraulic pumps, excavators, construction machines	1.5 ... 1.75	❑	❑	❑	❑	☺	☺	❑	☺	–
Compressors / screw-type compressors	1.5 ... 1.75	❑	❑	❑	❑	☺	–	❑	☺	☺
Agricultural machinery	1.75 ... 2.5	❑	❑	☺	☺	☺	–	❑	☺	❑
Other
Turbine gear units	1.5 ... 1.75	❑	☺	☺	–	–	–	–	–	–
Hydraulic motor - gear unit	1.25 ... 1.5	–	❑	❑	❑	☺	☺	❑	❑	❑
Electric motor with gear unit
Chemical industry
Extruders	1.5 ... 2.0	–	☺	☺	❑	☺	–	☺	❑	–
Pumps - centrifugal pumps	1.0 ... 1.5	☺	☺	☺	☺	☺	❑	☺	–	–
Pumps - piston pumps	1.75 ... 2.5	☺	☺	☺	☺	☺	–	☺	☺	☺
Pumps - plunger pumps	1.5 ... 1.75	☺	☺	☺	☺	☺	–	☺	☺	☺
Reciprocating compressors	1.75 ... 2.5	❑	☺	☺	❑	☺	–	☺	☺	☺
Calenders	1.5 ... 1.75	❑	☺	☺	☺	☺	–	☺	☺	–
Kneaders	1.75 ... 2.5	❑	☺	☺	❑	☺	–	☺	☺	☺
Cooling drums	1.25 ... 1.5	☺	☺	☺	☺	☺	❑	–	–	–
Mixers	1.25 ... 1.5	☺	☺	☺	☺	☺	❑	–	–	–
Stirrers	1.25 ... 1.5	☺	☺	☺	☺	☺	☺	☺	–	–
Toasters	1.25 ... 1.5	–	☺	☺	☺	☺	–	☺	–	–
Drying drums	1.25 ... 1.5	☺	☺	☺	☺	☺	–	☺	–	–
Centrifuges	1.25 ... 1.5	☺	☺	☺	☺	☺	☺	☺	–	–
Crushers	1.5 ... 2.5	☺	☺	☺	❑	☺	–	☺	–	☺
Power generation and conversion
Compressed air, reciprocating compressors	1.75 ... 2.5	❑	☺	☺	–	☺	–	☺	☺	☺
Compressed air, screw-type compressors	1.25 ... 1.5	–	☺	☺	☺	☺	❑	–	☺	❑
Air - Blowers	1.5 ... 1.75	☺	☺	☺	☺	☺	❑	☺	❑	❑
Air - Cooling tower fans	1.5 ... 1.75	☺	☺	☺	❑	☺	–	☺	❑	❑
Air - Turbine blowers	1.5 ... 1.75	–	☺	☺	–	❑	–	–	–	–
Generators, converters	1.25 ... 1.5	☺	☺	❑	–	☺	–	–	–	–
Welding generators	1.25 ... 1.5	–	☺	❑	–	☺	–	–	–	–
Metal production, iron and steel works
Plate tilters	1.5 ... 2.0	–	☺	❑	–	☺	–	☺	–	☺
Ingot pushers	1.75 ... 2.5	–	☺	❑	–	☺	–	☺	–	☺
Slabbing mill	1.75 ... 2.5	–	☺	❑	–	☺	–	☺	–	☺
Coiling machines	1.5 ... 2.0	–	☺	❑	–	☺	–	☺	–	☺
Roller straightening machines	1.5 ... 2.0	–	☺	❑	–	☺	–	☺	–	☺
Roller tables	1.75 ... 2.5	–	☺	❑	–	☺	–	☺	–	☺
Shears	1.75 ... 2.0	–	☺	❑	–	☺	–	☺	–	☺
Rollers	1.75 ... 2.0	–	☺	❑	–	☺	–	☺	–	☺
Metal working machines
Plate bending machines	1.5 ... 2.0	–	☺	❑	–	☺	–	☺	–	☺
Plate straightening machines	1.5 ... 2.0	–	☺	❑	–	☺	–	☺	–	☺
Hammers	1.75 ... 2.5	–	☺	❑	–	☺	–	☺	–	☺
Planing machines	1.75 ... 2.5	–	☺	❑	–	☺	–	☺	–	☺
Presses, forging presses	1.75 ... 2.0	–	☺	❑	–	☺	–	☺	–	☺
Shears	1.5 ... 2.0	–	☺	❑	–	☺	–	☺	–	☺
Grinding machines	1.25 ... 1.75	–	☺	☺	–	☺	–	☺	–	☺
Punches	1.5 ... 2.0	–	☺	❑	–	☺	–	☺	–	☺
Machine tools: Main drives	1.5 ... 1.75	–	❑	☺	–	–	–	–	–	–
Machine tools: Auxiliary drives	1.25 ... 1.5	–	❑	☺	–	–	❑	–	–	–
Food industry
Filling machines	1.25 ... 1.5	–	❑	☺	–	–	–	–	–	–
Kneading machines	1.5 ... 2.0	☺	❑	☺	–	☺	–	–	–	–
Mashers	1.5 ... 2.0	☺	❑	☺	–	☺	–	–	–	–
Sugar cane production	1.5 ... 2.0	☺	☺	☺	❑	☺	–	–	–	–
Production machines
Construction machines, hydraulic pumps	1.25 ... 1.5	–	☺	☺	–	☺	☺	–	–	–
Construction machines, traversing gears	1.5 ... 1.75	❑	☺	☺	❑	☺	❑	☺	☺	☺
Construction machines, suction pumps	1.5 ... 1.75	–	☺	☺	☺	☺	–	❑	–	–
Construction machines, concrete mixers	1.5 ... 1.75	☺	☺	–	–	☺	–	☺	☺	❑
Printing machines	1.25 ... 1.5	–	❑	☺	❑	☺	–	–	–	–
Woodworking - barking drums	1.5 ... 2.0	☺	❑	☺	❑	☺	–	☺	❑	❑
Woodworking - planing machines	1.5 ... 2.0	–	❑	☺	❑	☺	–	☺	❑	❑
Woodworking - reciprocating saws	1.5 ... 1.75	–	❑	☺	❑	☺	–	❑	❑	❑
Grinding machines	1.5 ... 1.75	–	❑	☺	❑	☺	–	❑	–	–
Textile machines - winders	1.5 ... 1.75	–	❑	☺	❑	☺	–	❑	–	–
Textile machines - printing machines	1.5 ... 1.75	–	❑	☺	❑	☺	–	❑	–	–
Textile machines - tanning vats	1.5 ... 1.75	–	❑	☺	❑	☺	–	❑	–	–
Textile machines - shredders	1.5 ... 1.75	–	❑	☺	–	☺	–	❑	–	❑
Textile machines - looms	1.5 ... 1.75	–	❑	☺	–	☺	–	–	–	–
Packaging machines	1.5 ... 1.75	–	❑	☺	❑	☺	❑	–	–	–
Brick molding machines	1.75 ... 2.0	–	❑	☺	–	☺	–	❑	–	❑
Transport and logistics
Passenger transport - elevators	1.5 ... 2.0	–	☺	☺	–	☺	–	–	–	–
Passenger transport - escalators	1.5 ... 2.0	–	☺	☺	–	☺	–	–	–	–
Conveyor systems - bucket elevators	1.5 ... 2.0	☺	☺	☺	❑	☺	–	–	–	–
Conveyor systems - hauling winches	1.5 ... 2.0	☺	☺	☺	❑	☺	–	–	–	–
Conveyor systems - belt conveyors	1.5 ... 2.0	☺	☺	☺	☺	☺	–	–	–	–
Conveyor systems - endless-chain conveyors	1.5 ... 2.0	☺	☺	☺	–	☺	–	–	–	–
Conveyor systems - circular conveyors	1.5 ... 2.0	☺	☺	☺	❑	☺	–	–	–	–
Conveyor systems - screw conveyors	1.5 ... 2.0	☺	☺	☺	❑	☺	–	–	–	–
Conveyor systems - inclined hoists	1.5 ... 2.0	☺	☺	☺	–	☺	–	–	–	–
Crane traversing gear	1.5 ... 2.0	–	☺	☺	☺	☺	–	–	–	–
Hoisting gear	1.5 ... 2.0	–	☺	☺	–	☺	–	–	–	–
Crane lifting gear	2.0 ... 2.5	–	☺	☺	–	☺	–	–	–	–
Crane traveling gear	1.5 ... 1.75	–	☺	☺	☺	☺	–	–	–	–
Crane slewing gear	1.5 ... 1.75	–	☺	☺	☺	☺	–	–	–	–
Crane fly jib hoists	1.5 ... 2.0	–	☺	☺	–	☺	–	–	–	–
Cable railways	1.5 ... 2.0	–	☺	☺	–	☺	–	–	–	–
Drag lifts	1.5 ... 2.0	–	☺	☺	–	☺	–	–	–	–
Winches	1.5 ... 2.0	–	☺	☺	–	☺	–	–	–	–
Cellulose and paper
Paper-making machines, all	1.5 ... 1.75	–	❑	☺	❑	❑	–	–	–	–
Pulper drives	1.5 ... 1.75	☺	❑	☺	❑	☺	–	–	–	–
Cement industry
Crushers	1.75 ... 2.5	☺	☺	☺	❑	☺	–	❑	–	–
Rotary furnaces	1.5 ... 2.0	☺	☺	☺	–	☺	–	❑	–	❑
Hammer mills	1.75 ... 2.5	☺	☺	❑	–	☺	–	–	–	❑
Ball mills	1.75 ... 2.0	☺	☺	❑	❑	☺	–	❑	–	❑
Pug mills	1.75 ... 2.0	☺	☺	❑	❑	☺	–	☺	–	–
Mixers	1.5 ... 1.75	☺	☺	❑	☺	☺	–	❑	–	–
Pipe mills	1.5 ... 1.75	☺	☺	☺	☺	☺	–	❑	–	–
Beater mills	1.75 ... 2.5	☺	☺	☺	❑	☺	–	❑	–	–
Separators	1.5 ... 1.75	☺	☺	☺	☺	☺	–	❑	–	–
Roller presses	1.75 ... 2.5	☺	☺	☺	❑	☺	–	–	–	–

☺ Preferred solution

❑ Possible, less common

– Uncommon

FLUDEX couplings are mostly mounted on the high-speed gear shaft.