SIZING AND SELECTION PRECISION COUPLINGS LINE SHAFTS ZA l EZ

Symbols

A
     Total length (mm)
AB
     Distance between flextures (mm)
     AB = (A - 2xN)
Z
     Tube length (mm)
     Z = (A – 2xH)
H
     Length of coupling ends (mm)
N
     Length to flexture (mm)
TAS
     Peak torque of the drive (Nm)
φ
     Torsional deflection (degree)
CTB
     Torsional stiffness of both flexible elements (Nm/rad)
CTZWR
     Torsional stiffness per 1m of tubing (Nm/rad)
CTZA
     Total torsional stiffness (Nm/rad)
nk
     Critical speed (1/min.)
CTdynE
     Dynamic torsional stiffness of both elastomer inserts (Nm/rad)

CTdynEZ

 

     Total torsional stiffness (Nm/rad)

 

Table 1
Table 2

R+W Calculation Program

Using proprietary software, R+W will calculate the specific mechanical details of exactly the model you plan to use. Overall length, tube materials (e.g. steel, aluminum, CFK), and other factors are used to determine a number of performance values unique to your line shaft coupling.

Critical Speed     nK = 1/min.
Torsional stiffness of tubing     CTZWR = Nm/rad
Overall stiffness     CTZA = Nm/rad
Torsional Deflection     φ = Grad-Min-Sec
Total weight     m = kg
Moment of inertia     J = kgm²
Maximum misalignment     Δ Kr = mm