HBM Z4A, Mounting Instructions, Page: 37 / 76

37
Z4A
HBM A0697-7.0 de/en/fr
Installing knuckle eye, ZKM and threaded adapters:
• Screw the knuckle eye thread into the transducer’s inside thread until it
reaches the stop, then loosen it by one turn.
• With Z4A/500kN in addition: turn the knuckle eye to align the bushing holes
with the knuckle eye apertures.
a
f
∅ B
W
M
A
M
A
ZGOW/ZGUW knuckle eye accessories
Bushing
Type
upper knuckle eye
lower knuckle eye
Order number
Weight
(kg)
a f
W ∅ B
M
A
(N
V
m)
min max min max
Z4A/20kN
Z4/20kN/ZGOW
Z4/20kN/ZGUW
0.2
aprox.
158
aprox.
170
aprox.
198
aprox.
210
21 16
H7
120
Z4A/50kN
U2A/2t/ZGOW
U2A/2t/ZGUW
0.8
0.4
aprox.
190
aprox.
199
aprox.
245
aprox.
254
25 20
H7
350
Z4A/100kN
Z4/100kN/ZGOW
Z4/100kN/ZGUW
1.1
aprox.
261
aprox.
269
aprox.
331
aprox.
339
37 30
H7
950
Z4A/200kN
U2A/10t/ZGOW
U2A/10t/ZGUW
3.2
1.1
aprox.
352
aprox.
357
aprox.
475
aprox.
480
35 50
+0,001
+0,014
2000
Z4A/500kN
Z4/500kN/ZGOW
Z4/500kN/ZGUW
17.3
12.0
aprox.
570
aprox.
590
aprox.
764
aprox.
784
44 60
+0,003
+0,018
4000
1)
1)
underside secured with 2 screws to prevent rotation; transducer side with internal thread
For dynamic loading , Z4A transducers must be installed without play.
Knuckle eyes only have limited applicability for dynamic loading, as with
dynamic alternating stress, the pivoting bearings increase their bearing
clearance, thus falsifying the measured value. With the increased load cycle,
there is a risk that the knuckle eyes could be destroyed. For this type of
loading, we recommend using flexible tension bars or pressure bars.
To install the transducers without play, they must be sufficiently prestressed
and locked with the mounting accessories (knuckle eyes, tension bars or
pressure bars).