FLENDER ZAPEX-ZI User Manual

ZAPEX-ZI
®
Zahnkupplungen nach internationalem Standard,
Fettschmierung, O-Ring-Dichtung
Gear Couplings acc. to International Standards,
Grease Lubrication, O-Ring Seal
Accouplements dentés conformes aux normes internationales,
lubrification par graisse, Joint torique

FLENDER ZAPEX-ZI Specifications

General

Type	ZAPEX-ZI
Category	Industrial Equipment
Manufacturer	FLENDER
Design	Double-jointed gear coupling
Backlash	Low
Lubrication	Oil or Grease
Cooling	Natural cooling
Mounting Position	Horizontal

Summary

Characteristic Features

Key Product Advantages

Highlights key benefits such as operational reliability, compact design, low weight, and long service life due to optimal design and materials.

Design and Operation

Coupling Construction and Functionality

Explains the symmetrical design, crowned teeth, lubrication requirements, and sealing mechanisms of the ZAPEX-ZI couplings.

Rough Estimation of Coupling Size by Means of the Service Factor

Load Classification for Machine Type

Assigns load classification symbols (G, M, S) based on the type of driven machine to determine the service factor.

Service Factor f₁ and Operating Conditions

Details how to use the service factor f₁ based on machine type, daily operating hours, and starts per hour for accurate sizing.

Making Allowance for Shaft Displacement

Angular and Radial Misalignment Impact

Explains how angular misalignment (AKw) affects coupling size determination and the use of service factor f₂ from diagram 9.1.

Flange Fitting Dimensions

Flange Connection Standards and Interchangeability

Provides dimensions for flange connections and a substitution table for interchangeability with American manufacturers.

Calculation and Ordering Example

Torque-Based Design Calculation Example

Demonstrates calculating coupling size based on motor power, speed, and starting torque requirements.

Coupling Order Specification Example

Shows how to specify a ZAPEX coupling by type, size, bore dimensions, and included components.

Design Hints for Installation

Coupling Part Arrangement

Guides on correct arrangement of coupling hubs and sleeves on shaft ends according to assembly types A, AB, or B.

Bores and Tolerances

References table 22.1 for tolerance zones of finished bores and their assignment.

Mounting and Fastening Methods

Details standard mounting with keyways/set screws and options for shrink fitting or hydraulic mounting.

Shaft-End Bearing Support

Recommends supporting shaft ends in bearings adjacent to the coupling for easier seal replacement.

Balancing Procedures and Quality

Explains balancing based on the semi-wedge principle and specifies quality grades for different operating speeds.

Parallel Keys and ISO Fits

Shaft and Bore Fit Recommendations

Provides recommended shaft tolerances (h6 to x6) and bore tolerances (P7 to H7) for interference fits.

Parallel Key Connection Standards

Details dimensions for parallel key connections (DIN 6885/1) including keyway widths, heights, and depths.

Possible Special Designs

Couplings with Brake Elements

Illustrates ZAPEX couplings with integrated brake drums or brake discs for enhanced braking capabilities.

Coupling with Directional Segment

Shows a ZAPEX coupling variant with a holding segment to determine rotation direction, useful for specific drive applications.