Load Introduction - HBM HLC Série Instructions De Montage

Wägezelle Load cell
•
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Generally lubricate
washers and bolts with
SAE 30 WT.
See table for screw
torque values.
The base plate should be made from stainless steel 17--4PH (or similar), with a Rockwell
hardness 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:
Nominal load
Bolt size
220kg ... 1.76t M12-12.9
2.2t M20-10.9
4.4t M20-10.9
* Standard value for the strength class stated. For bolt design, please note the relevant information
provided by bolt manufacturers.
Generally lubricate washers and bolts with SAE 30 WT !!!
Note:
Missing washers and a base plate strength which is too low, cause most faults that occur
during weight 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 Technical data.

3 Load introduction

Loads should act as precisely as possibly in load direction. Torsion moments, off--centre loads, as
well as transverse or lateral forces cause measurement errors and may damage the load cell
permanently. Such interferences must be intercepted e.g. by transverse control arms or guide rollers,
with these elements not being permitted to take up any load or force components.
In order to minimize error interference due to load introduction, HBM Wägetechnik offers various
proven load introductions for load cell types HLCB... / BLCB... (B = version complete with
counterbore + thread), depending on the mounting situation:
D HLCB/ZFP/...t
D HLCB/...t/ZEL
D HLCB/ZDP/...t
The load cell type HLCA... (A = version with thread through) is provided for use with threaded bolt and
locknut. Depending on actual use, the threaded bolt can be screwed into the thread through in both
directions. The locknut will secure the threaded bolt on both surfaces. Please note the required
locknut torques from 40 ... 54Nm.
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Capteur de pesage
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Bolt torque *
130 Nm *
400 Nm *
400 Nm *
Load introduction swivel foot
elastomer bearing
elastomer bearing Easy Top
HLC... / BLC...
load direction
arrow for load direction
base plate
base plate
arrow for load direction
load direction
Base plate (h)
≥ 20 mm
≥ 25 mm
≥ 25 mm
x
x
x
x
Washers
DIN 433-13-300 HV-A2
DIN 433-21-300 HV-A2
DIN 433-21-300 HV-A2
MA.HLC/BLC.0def -- 22.10.99
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