Instruction
Manual
9289A_200-594e-07.21
RoaDyn S5ST
RoaDyn S5MT
Measuring hubs for
tire test stands
Type 9289A253
Type 9289A263
Page 19289A_200-594e-07.21
The information in this manual is subject to change without
notice. To keep pace with technical advancement, Kistler
reserves the right to make improvements and changes
to the product without obligation to notify any person or
organization of such changes.
© 2013 ... 2021 Kistler Group. Kistler Group products are
protected by various intellectual property rights. For more
details visit www.kistler.com. The Kistler Group includes
Kistler Holding AG and all its subsidiaries in Europe, Asia,
the Americas and Australia.
Kistler Group
Eulachstrasse 22
8408 Winterthur
Switzerland
Phone +41 52 224 11 11
info@kistler.com
Kistler Instrumente GmbH
Umberto-Nobile-Str. 14
DE-71063 Sindelngen
Germany
Phone +49 70 31 30 90 0
info.de@kistler.com
www.kistler.com
Foreword
Foreword
S5ST/S5MT Measuring hubs for tire test stands
9289A_200-594e-07.21Page 2
Content
2. Important Notes...........................................................................................................................5
2.2 Warnings .............................................................................................................................5
3. Product description ....................................................................................................................8
3.1 Overview .............................................................................................................................8
3.2 Features .............................................................................................................................8
3.3 Application ..........................................................................................................................9
3.4 Measuring chains .............................................................................................................10
3.4.1 Digital ..................................................................................................................10
3.4.2 Analog .................................................................................................................11
3.5 Technical data ...................................................................................................................12
4. Installation .................................................................................................................................13
4.1 Dimensions .......................................................................................................................14
4.1.1 RoaDyn S5ST, Type 9289A253 (60 kN) ..............................................................14
4.1.2 RoaDyn S5MT, Type 9289A263 (100 kN) ...........................................................15
4.2 Mounting the measuring hub on the test stand ................................................................16
4.2.1 RoaDyn S5ST, Type 9289A253 (60 kN) ..............................................................17
4.2.1.1 Mounting location RoaDyn S5ST .........................................................17
4.2.1.2 Mounting RoaDyn S5ST on the tire test stand.....................................17
4.2.2 RoaDyn S5MT, Type 9289A263 (100 kN) ...........................................................19
4.2.2.1 Mounting location RoaDyn S5MT ........................................................19
4.2.2.2 Mounting RoaDyn S5MT on the tire test stand ....................................19
4.3 Connection and cables for the measuring system ............................................................21
5. Oil lubrication ............................................................................................................................22
5.1 Oil connection ...................................................................................................................22
5.2 Oil circulating lubrications .................................................................................................22
5.3 Oil Lubrication System ......................................................................................................24
5.3.1 RoaDyn S5ST, Type 9289A253 (60 kN) ..............................................................24
5.3.2 RoaDyn S5MT, Type 9289A263 (60 kN) .............................................................25
6. Operation ...................................................................................................................................26
6.1 Permissible Loads on the Measuring Hub ........................................................................26
6.1.1 Denition of Forces, Moments and Oset ...........................................................26
6.1.2 RoaDyn S5ST, Type 9289A253 (60 kN) ..............................................................27
6.1.3 Calculation example for RoaDyn S5ST, Type 9289A253 (60 kN) .......................28
6.1.4 RoaDyn S5MT, Type 9289A263 (100 kN) ...........................................................29
6.1.5 Calculation example for RoaDyn S5MT, Type 9289A263 (100 kN) .....................30
Page 39289A_200-594e-07.21
Total pages 56
6.2 Setup of the measuring ystem ..........................................................................................31
6.2.1 Connection of RoaDyn S5ST, Type 9289A253 (60 kN) .......................................31
6.2.1.1 Necessary information on calibration certicate ..................................31
6.2.1.2 Formula RoaDyn S5ST, Type 9289A253 (matrix notation) ..................33
6.2.1.3 Formula RoaDyn S5ST, Type 9289A253 (expanded notation) ............34
6.2.2 Connection of RoaDyn S5MT (Type 9289A263) ................................................35
6.2.2.1 Necessary information on calibration certicate ..................................36
6.2.2.2 Formula RoaDyn S5MT, Type 9289A263 (matrix notation) .................38
6.2.2.3 Formula RoaDyn S5MT, Type 9289A263 (expanded notation) ...........39
6.3 Mounting adapter ange or wheel assembly on the spindle .............................................40
6.4 Mounting equipment on the rear side of the measuring hub ............................................40
6.4.1 RoaDyn S5ST, Type 9289A253 (60 kN) ..............................................................41
6.4.2 RoaDyn S5MT, Type 9289A263 (100 kN) ...........................................................42
6.5 Service life of bearings .....................................................................................................43
6.5.1 RoaDyn S5MT, Type 9289A263 (100 kN) ...........................................................43
6.5.1.1 Load case 1 .........................................................................................43
6.5.1.2 Load case 2 .........................................................................................44
6.5.1.3 Load case 3 .........................................................................................45
6.6 Running the system ..........................................................................................................46
7. Maintenance ..............................................................................................................................47
7.1 Checking calibration, function test and recalibration ........................................................47
7.2 Maintenance work ............................................................................................................47
8. Troubleshooting ........................................................................................................................48
8.1 Fault location and rectication ..........................................................................................48
8.2 Defective measuring hub ..................................................................................................49
9. Accessories ...............................................................................................................................50
9.1 RoaDyn S5ST, Type 9289A253 (60 kN) – included accessories ......................................50
9.2 RoaDyn S5MT, Type 9289A263 (100 kN) – included accessories ....................................50
9.3 Optional accessories ........................................................................................................50
10. Appendix ....................................................................................................................................51
S5ST/S5MT Measuring hubs for tire test stands
9289A_200-594e-07.21Page 4
1. Introduction
Thank you for choosing a Kistler quality product. Read
this instruction manual carefully so that you can make full
use of your product’s many features.
Where permitted by law, Kistler accepts no liability if this
instruction manual is disregarded or if products other than
those listed under accessories are used.
Kistler oers a wide range of measuring technology
products and complete solutions:
Piezoelectric sensors for the measurement of pressure,
force, torque, strain, acceleration, shock and vibration
Strain gauge sensor systems for the measurement of
force and torque
Piezoresistive pressure sensors and transmitters with
the corresponding ampliers
Corresponding ampliers (charge ampliers,
piezoresistive ampliers, etc.), indicators and charge
calibrators
Devices for electronic control, monitoring and evalu-
ation units as well as application-specic software for
measurement technology
Data transmission modules (telemetry)
Kistler also designs entire measurement systems for
specic purposes, for example, in the automotive industry,
in plastics processing and in biomechanics.
Our complete catalog provides an overview of our product
range. Detailed data sheets are available for nearly all
products.
If you still have any specic questions after studying these
instructions, the Kistler customer service is available
to you around the world and can also provide you with
competent advice on application-specic problems.
Important notes
Page 59289A_200-594e-07.21
2. Important notes
Observe the following remarks before you commission
the device. Kistler accepts no responsibility for damages
that could arise from improper use of this product.
2.1 For your safety
This product has been manufactured in compliance with
current valid safety regulations. It has left the factory in a
perfect, safe condition. In order to maintain this condition
and ensure safe operation, compliance is required with
the instructions and warning notes contained within this
manual or imprinted on the product itself.
Only persons who are familiar with the installation,
commissioning, operation and maintenance of comparable
devices and who possess the qualications necessary for
the given task may work with the device.
If there is evidence that safe operation is no longer pos-
sible, the instrument must be powered o and rendered
safe against accidental start-up. Safe operation is no lon-
ger possible when the product:
shows visible signs of damage
is no longer operating
has been subjected to prolonged storage under unsuit-
able conditions
has been subjected to rough transit conditions
2.2 Warnings
Kistler measuring hubs have been developed and manu-
factured to state-of-the-art standards and ac cording to
the best technical knowledge. However, the high-perfor-
mance components are not designed for unlimited service
life as they are heavily utilized up to the permanent load
and therefore subject to wear.
The following safety measures must be strictly observed.
S5ST/S5MT Measuring hubs for tire test stands
9289A_200-594e-07.21Page 6
Strictly follow the operating instructions during mounting,
in particular concerning tightening torques for screws, the
correct tting of parts, adequate clearance for the xation
arms and safe cable installation.
Loading for the wheel force transducer and its accesso-
ries must not exceed the overload ranges and operating
temperature range specied in the data scheet.
If there is a reason to assume that these overload ranges
have been exceeded, the parts must be tested (e.g. visu-
al inspection, crack analysis, etc.).
All parts must be subjected to an inspection on each
occasion before use.
A crack test must be carried out after the rst 100 hours of
operating time.
After 500 hours of operating time, the instrument wheel
and the accessories must be subjected periodically to a
crack test.
For wheel force measurements, it is important to install
the measuring hub to the test stand correctly!
Secure all parts mounted on the shaft in accordance with
the expected forces!
2.3 How to use the instrument
The measuring hub may only be used under the
specied environmental and operating conditions.
Protect the signal output of the instrument against
contamination and do not touch it with your ngers. Fit
the cover supplied when the connection is not used.
Protect the measuring hub while it is not in use by
keeping it in the supplied transport and storage box.
Important notes
Page 79289A_200-594e-07.21
2.4 What happens after modications?
As a rule, modications to instruments result in alterations
of the operating instructions. In such cases, inquire at
your Kistler distributor about the possibilities of updating
your documentation. The current instruction manuals
are available for download from the Kistler website
(www.kistler.com, registration required) or at your local
Kistler representative.
2.5 Disposal instructions for electrical and electronic equipment
Do not dispose of old electronic instruments in municipal
trash. For disposal when the product has come to the end
of its service life, please return it to an authorized local
electronic waste disposal service or contact the nearest
Kistler Instrument sales oce for return instructions.
2.6 Software upgrades and updates
Kistler may occasionally supply upgrades or updates for
embedded software. Such upgrades or updates must
always be installed.
Kistler declines any liability whatsoever for any direct
or consequential damage caused by products running
on embedded software that has not been upgraded or
updated with the latest available software.
For additional information, please contact Kister – by
phone +49 7031 3090 0 or email: info.de@kistler.com
S5ST/S5MT Measuring hubs for tire test stands
9289A_200-594e-07.21Page 8
3. Product description
3.1 Overview
The 5(6)-component RoaDyn S5MT/S5ST measuring
hubs are ideally suited to measure durability and tire cha-
racteristics of commercial vehicles on tire test stands.
They measure the longitudinal, transverse and vertical
forces Fx, Fy and Fz and the corresponding moments Mx,
My2) and Mz acting at the tire contact area.
RoaDyn S5MT/S5MT measuring hubs are robust, high-
precision measuring tools, equipped with four or ve high-
precision oval strain gage load cells, which are mounted
between base and top plate.
The measuring hub is stationary, i.e. base plate, top
plate and load cells are mounted non-rotating at the tire
test stand. The measuring hub incorporates a rotary axis
(shaft) with predened hub hole patterns on which the test
tire/rim combinations are mounted. This setup guarantees
optimum power ow with minimum cross talk between the
individual force components and a high natural frequency
of the complete measuring system. The shaft end is lead
through the back side of the measuring hub and is pre-
pared for installation of a driving or braking device. The
inlet and outlet ports for the oil circuit on the back of the
measuring hub are intended for lubricating and cooling of
the bearings in order to achieve constant heat conditions
even with large loads and increased rotational speeds.
2) My can only be measured when a brake is installed at the test stand,
otherwise My = 0
3.2 Features
High precision tire characteristics measurements for
commercial vehicle tires
Strain gage load cell technology for static and dynamic
tire measurements
Static measurement of vertical force Fz enables tire
test stand controlling (no additional force sensors nec-
essary)
Modular design
High rigidity
Factory calibrated
Prepared for oil lubrication
Product description
Page 99289A_200-594e-07.21
3.3 Application
Typical areas of use are measurements of tire characte-
ristics on tire test stands in the laboratory as well as on
mobile test vehicles in the elds of durability, non-unifor-
mities, vibrations, braking characteristics, adhesion etc.
Fig. 1: RoaDyn S5ST measuring hub, Type 9289A253
(60 kN)
Fig. 2: RoaDyn S5MT measuring hub, Type 9289A263
(100 kN)
S5ST/S5MT Measuring hubs for tire test stands
9289A_200-594e-07.21Page 10
3.4 Measuring chains
3.4.1 Digital
Fig. 3: Digital measuring chain for RoaDyn S5ST, Type
9289A253 (60 kN)
Fig. 4: Digital measuring chain for RoaDyn S5MT, Type
9289A263 (100 kN)
Product description
Page 119289A_200-594e-07.21
3.4.2 Analog
Fig. 5: Analog measuring chain for RoaDyn S5ST,
Type 9289A253 (60 kN)
Fig. 6: Analog measuring chain for RoaDyn S5MT,
Type 9289A263 (100 kN)
S5ST/S5MT Measuring hubs for tire test stands
9289A_200-594e-07.21Page 12
3.5 Technical data
S5ST, Type
9289A253
S5MT, Type
9289A263
Measuring range1) FxkN –60 ... 60 –100 ... 100
FykN –40 ... 40 –50 ... 50
FzkN 0 ... 60 0 ... 100
MxkN·m –29 ... 29 –40 ... 40
My2) kN·m –15 ... 15 –30 ... 30
MzkN·m –9 ... 9 –15 ... 15
Calibration range3) FxkN 0 ... 60 0 ... 100
FykN 0 ... 40 0 ... 50
FzkN 0 ... 60 0 ... 100
Linearity Fx, Fz, Fy%FSO ≤±0.5
Crosstalk4) Fy –> Fx, Fz%≤±1.0
Fx <–> Fz%≤±1.0
Fx, Fz –> Fy%≤±1.0
Natural frequency fn (x,y, z) Hz ≈800 ≈700
Max. rotational speed min-1 1 850 1 000
Mass m kg 196 243
Operating temperature range °C +5 ... 70
Degree of protection (cable mounted) IP65
1)
It is assumed that the extreme values do not occur simultaneously
2) My can only be measured when a brake is installed at the test stand, otherwise My = 0
3) Standard force application point at tire radius R = 500 mm and press-indepth e = 0 mm
4) In combination with signal post-processing in customer‘s data acquisition and Kistler supplied algorithm
For complete specications please refer to data sheets
000-986e and 000-987e, available on www.kistler.com.
Installation
Page 139289A_200-594e-07.21
4. Installation
Measuring hubs of Type 9289A2x3 are precision instru-
ments and must be handled carefully. Please take note of
the following:
Do not drop the measuring hub or expose it to any
hard knocks! The maximum force of such shocks could
exceed the measuring range of the instrument and
cause severe damage
Do not use a hammer for positioning the rim adapter,
since hammer blows can cause deformation of the
bearings or rim
In the following chapters, you will nd information on ins-
talling the measuring hub and basic details for setting up
the test rig.
S5ST/S5MT Measuring hubs for tire test stands
9289A_200-594e-07.21Page 14
4.1 Dimensions
4.1.1 RoaDyn S5ST, Type 9289A253 (60 kN)
Fig. 7: Dimensions of RoaDyn S5ST, Type 9289A253
(60 kN)
S5ST/S5MT Measuring hubs for tire test stands
9289A_200-594e-07.21Page 16
4.2 Mounting the measuring hub on the test stand
Please comply with the following notes for correct
mounting of the measuring hub:
The measuring hub must be installed only by qualied
persons who are familiar with devices of this type
Before mounting the measuring hub on a test stand or
another test device, check that the mounting surface
is at and clean. Uneven and dirty contact surfaces
cause internal distortions, which will expose the indi-
vidual force sensors to additional high stress, which
could reduce the accuracy
Before mounting the measuring hub on a test stand or
another test device, connect the oil hoses as explained
in chapter 5 and mount all additional equipment on the
shaft rear side such as resolver, slip ring, brake disc…
Depending on the accessibility to the test stand, cables
can also be connected in advance
Ensure accuracy and cleanliness in all work involving
electrical connections. Do not remove the cover caps
from the connections until immediately before connect-
ing a cable
Before connecting the cable to the measuring hub
clean both sides of the connector (measuring hub and
cable) with the cleaning and insulation spray Type
1003. Check orientation and plug in the cable until a
proper contact is made
Installation
Page 179289A_200-594e-07.21
4.2.1 RoaDyn S5ST, Type 9289A253 (60 kN)
4.2.1.1 Mounting location RoaDyn S5ST
The measuring hub can be mounted either on the left, the
right or on the top side of the drum (Fig. 9).
Fig. 9: Horizontal drum axle with dierent positions of
the measuring hub RoaDyn S5ST and corres-
ponding coordinate system
4.2.1.2 Mounting RoaDyn S5ST on the tire test stand
Stand clear while heavy loads are moving!
Mind your hands and never place yourself between two
moving loads!
For easy handling a special mounting bracket including
screws is delivered together with the measuring hub.
Mount this tool onto the measuring hub (Fig. 10).
S5ST/S5MT Measuring hubs for tire test stands
9289A_200-594e-07.21Page 18
Fig. 10: Mounting bracket
Type label
Area for spirit level
M16x30
(100 N∙m)
Mount both of the two M16x80 set screws (included in
the scope of delivery) onto the test stand interface for
guidance.
Fig. 11: Mounting set screws for guidance (schematic)
Move the measuring hub carefully by crane to the test
stand.
Standard mounting of the measuring hub is done by using
the twelve delivered M16x60 mm screws and washers.
These screws are on a 410 mm pitch circle diameter and
must be tightened with a torque of 190 … 200 N∙m.
In order to mount screws number eleven and twelve, the
M16x80 set screw has to be removed in advance.
Installation
Page 199289A_200-594e-07.21
Use a spirit levelt to adjust the measuring hub.
Wherever possible, the connecting cable should
remain permanently connected to the measuring hub
Fit the connecting cable and the oil hoses in such a
way as to prevent the cable from shearing o or being
ripped out
4.2.2 RoaDyn S5MT, Type 9289A263 (100 kN)
4.2.2.1 Mounting location RoaDyn S5MT
The measuring hub can be mounted either on the left, the
right or on the top side of the drum (Fig. 12).
Fig. 12: Horizontal drum axle with dierent positions of
the measuring hub RoaDyn S5MT and corres-
ponding coordinate system
4.2.2.2 Mounting RoaDyn S5MT on the tire test stand
Stand clear while heavy loads are moving!
Mind your hands and never place yourself between two
moving loads!
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