HBM HLC Montageanleitung Seite 11

See table for bolt
tightening torque.
The base plate should be made from stainless steel, with a Rockwell hardness of 42.
The surfaces "X" must be even and in parallel (0.25 mm).
Load cells are to be clamped in tightly at the mounting bores - like a cantilever
beam. Later, the load will be introduced at the other end. The following table
contains all recommended bolts and torques:
E Thread
max
size
v2 t
M12‐12.9
2.2 t M20‐10.9
4.4 t M20‐10.9
10 t M24‐10.9
1)
Standard value for the property class stated. For bolt design, please note the relevant information
provided by bolt manufacturers.
Important
Missing washers and a base plate strength which is too low, cause most faults
that occur during load cell use. In particular, this applies to the strength of the
base plate which has a direct influence on the "Hysteresis error" stated in the
Specifications.
HLC / HLC-P
Tightening
torque
1)
130 N⋅m
1)
400 N⋅m
1)
400 N⋅m
1)
900 N⋅m
A01130_07_Y00_00 HBM: public
base plate
base plate
Base plate (h)
w 20 mm
w 25 mm
w 25 mm
w 40 mm
Mounting
load direction
x
x
x
x
load direction
Washers
DIN 433‐13‐300 HV‐A2
DIN 433‐21‐300 HV‐A2
DIN 433‐21‐300 HV‐A2
DIN 433‐25‐300HV‐A2
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