Gear couplings

Gear couplings are positive locking and torsional stiff couplings for the torque transmission. The hubs are linked by fitting keys, toothed shafts or interference fit assemblies with the work machines. The toothing of hubs is achieved by crowned toothing. The thickness of the teeth decreases with increasing tooth width. Thanks to the crowned toothing, the swivel range is implemented with a small tooth flank clearance. The combination of small tooth flank clearance and centering in the toothing allows a smooth running over the entire speed and torque range.
The couplings in a double cardanic design (two hinge planes) are able to compensate radial, angular and axial shaft displacements. The grease lubrication ensures a low maintenance effort and a long durability. O-rings or double lip seals are inserted to seal the coupling space filled with grease.

Kupplungswerk Dresden has many years of experience in the sector of development and manufacturing of special gear couplings for many different applications.

Models:
model A: standard design;
model B: design for holding disc;
model C: design axial clearance limited;
model S: design with centrally located brake disc;
model H: design with spacer;
model U: design with undivided sleeve.

 

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Description

Technical characteristics:

Size range: from 1250 to 125000;

Nominal torque: from 12500 to 1250000 Nm.

Materials:
Hub: Tempering steel Re ≥ 380 MPa;
Sleeve: Tempering steel Re ≥ 350 MPa;
Body-fit bolts: Strength class 8.8.

Lubrication.
We recommend EP rolling bearing and/or EP gear grease as lubricant:

• Consistency according to DIN 51 818:
NLGI class 0 and/or 1;

• Designation according to DIN 51 502:
KP 0, (1) and/or GP 0, (1).

Balancing.
Balancing quality: grade Q16 for the components without keyway The reference speed for the balancing quality 1500 min-1.
Finer balancing qualities are available on request.
The balancing on finer balancing qualities requires a declaration of the operating speed and the balancing agreement to keyway according DIN ISO 8821 (half keyway agreement preferred).

Nominal values apply to the following operating conditions:

• impact free operation;

• number of start up processes: up to 30 times per hour with maximum torque;

• ambient temperatures from -20 °C to +80 °C;

• angular displacements up to 0.2° per hinge plane.

The line ZAKU-N is distinguished by:

• high power density;

• torque range from 12 500 to 1 250 000 Nm;

• permissible angular displacement up to ΔKw = 1.25°;

• realisation of three different hub distances by shifting one or both hubs;

• low maintenance effort;

• simple design.

We also offer special models:

• design with spacer or floating shaft;

• design with brake disc or brake drum;

• design with axial clearance limitation;

• design with safety elements;

• design with radially replaceable seal (model WD);

• design with toothing on one side;

• design for explosive surroundings

II 2 GD 120 °C (T4) -20 °C ≤ Ta ≤ +60 °C;

• special designs for highest speeds with oil injection lubrication;

• special designs for the vertical fitting;

• heavy design for increased torques;

• design of gear couplings according to KWN 21006 and 21007;

• other designs on request.

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