ISO/TS 17104:2006

TECHNICAL ISO/TS
SPECIFICATION 17104
First edition
2006-04-15
Rotary tool for threaded fasteners —
Hydraulic impulse tools — Performance
test method
Outils rotatifs pour éléments de fixation filetés — Outils hydraulique à
impulsion — Méthode d'essai des caractéristiques de fonctionnement

Reference number
©
ISO 2006
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ii © ISO 2006 – All rights reserved

Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols. 1
4 Method for measurement of performance . 5
5 Evaluation of test results . 11
6 Presentation of data . 12
Annex A (informative) Explanation and justification of the method . 13
Annex B (informative) Clamp force tester. 15
Annex C (informative) Torque coefficient (K) dependence on speed . 21
Annex D (informative) Example of form for hydraulic impulse tool performance test . 25
Bibliography . 27

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
In other circumstances, particularly when there is an urgent market requirement for such documents, a
technical committee may decide to publish other types of normative document:
⎯ an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in
an ISO working group and is accepted for publication if it is approved by more than 50 % of the members
of the parent committee casting a vote;
⎯ an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical
committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting
a vote.
An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a
further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is
confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an
International Standard or be withdrawn.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO/TS 17104 was prepared by Technical Committee ISO/TC 118, Compressors and pneumatic tools,
machines and equipment, Subcommittee SC 3, Pneumatic tools and machines.
iv © ISO 2006 – All rights reserved

Introduction
The test method specified in this Technical Specification is designed to measure the overall performance and
capability of hydraulic impulse tools.
This ISO/Technical Specification is intended to give users of impulse tools a means for measuring and
comparing the performance of hydraulic impulse tools under controlled conditions.
Every effort has been made to specify all critical characteristics of the test fixtures conforming to this Technical
Specification. However, test results from different test fixtures can be affected by differences in dynamic
characteristics, thereby making direct comparisons difficult.
The ISO/TS can be used for comparing the torque capabilities of impulse tools. It has not so far been possible
to achieve acceptable reproducibility of the correlated torque scatter and it is hoped that data accumulated
through experience of using the ISO/TS enables improvements to be made when it is reviewed three years
after publication. In the meantime, when comparing the performances of different tools, quoted differences in
correlated torque scatter (as a percentage of mean correlated torque) of fewer than ten percentage points
should be viewed with caution/treated as insignificant, until verified by the potential user or purchaser of the
tools.
TECHNICAL SPECIFICATION ISO/TS 17104:2006(E)

Rotary tool for threaded fasteners — Hydraulic impulse tools —
Performance test method
1 Scope
This Technical Specification specifies a laboratory performance test method for hydraulic impulse tools for
installing threaded fasteners. It gives instructions on the procedure, performance parameters to test and how
to evaluate and present the test data.
Justification for the test method is found in Annex A.
The test method is not intended as a routine in-plant inspection method.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 2787, Rotary and percussive pneumatic tools — Performance tests
ISO 5393, Rotary tools for threaded fasteners — Performance test method
3 Terms, definitions and symbols
For the purposes of this document, the following terms, definitions and symbols apply.
3.1
hydraulic impulse tool
powered assembly tool for tightening threaded fasteners, which applies torque to a fastener in discontinuous
increments through a hydraulic impulse unit
3.1.1
automatic shut-off tool
powered assembly tool for tightening threaded fasteners, which is provided with a control mechanism or
system that shuts off or disconnects the power to the motor when a predetermined output level is attained
3.1.2
non shut-off tool
powered assembly tool for tightening threaded fasteners, which continues to apply torque impulses as long as
the throttle remains in the “on” position
3.2
standard deviation
s
measure of the dispersion (scatter) based on the mean-squared deviation from the arithmetic mean derived
from a sample of a statistical population
3.3
six sigma
6s
range of probability, plus and minus three standard deviations from the mean, derived from a sample of a
statistical population
NOTE For a normally distributed statistical population, 99,73 % of all members of that population are encompassed.
3.4
diameter
D
nominal diameter of a bolt
NOTE The diameter is expressed in millimetres.
3.5
angle
measure of the angular displacement through which a fastener is turned
NOTE The angle is expressed in degrees.
3.6
clamp force
F
C
result of the force achieved by turning a bolt in the tightening direction after the bolt head makes contact with
the joint bearing surface
NOTE The clamp force is expressed in newtons.
3.6.1
peak clamp force
F
CP
peak value of the clamp force measured during a tightening cycle
NOTE The peak clamp force is expressed in newtons.
3.6.2
target clamp force
F
CT
clamp force required to achieve the test torque when testing a hydraulic impulse tool on a test joint based on
Equation (1):
F=×TK/ D (1)
( )
CT T
where T is defined in 3.7.10, K is defined in 3.9.1, and D is defined in 3.4.
T
3.7
torque
product of the force turning the fastener and the perpendicular distance between the line of force and the
centre of the fastener
3.7.1
dynamic torque
T
D
torque recorded during the calibration of the test joint as described in 4.2.2 and 4.2.6
NOTE 1 For test joint analysis, dynamic torque is measured with an in-line, rotary torque and angle transducer, placed
between a continuous drive spindle and the socket/driver bit.
NOTE 2 Dynamic torque is expressed in newton-metres.
2 © ISO 2006 – All rights reserved

3.7.2
peak dynamic torque
T
DP
peak value of the dynamic torque recorded during a tightening cycle performed during the test joint calibration
procedure described in 4.2.6
3.7.3
correlated torque
T
C
torque derived from a peak clamp force measurement based on Equation (2):
TK=×D×F (2)
CCP
where K is defined in 3.9, F is defined in 3.6.1 and D is defined in 3.4
CP
NOTE The correlated torque is expressed in newton-metres.
3.7.4
mean correlated torque
T
C
arithmetic mean of a number of correlated torque readings on a specific joint as defined in 3.7.3
3.7.5
6s-correlated torque scatter
S
6s
predictable range of correlated torque over which a tool performs at a given setting using a single torque-rate
joint under controlled conditions
NOTE 1 For the practical purposes of this Technical Specification, 6s correlated torque scatter of a tool is the total
probable range of torque of a tool run on a single joint at the same setting of the tool torque adjustment.
NOTE 2 6s-correlated torque scatter is calculated according to 5.1.
3.7.6
6s-correlated torque scatter as a percentage of the mean correlated torque
S
6s,p
single numerical percentage value designating the correlated torque capability of a tool run on a single torque
rate joint under controlled conditions
NOTE 6s-correlated torque scatter as a percentage of the mean correlated torque is calculated according to 5.1.
3.7.7
combined mean correlated torque
T
C
comb
midpoint between the lowest and highest predictable correlated torque readings of a tool at a given setting
when tested on both test joints
NOTE The combined mean correlated torque is calculated according to 5.2.
3.7.8
combined correlated torque scatter
∆T
Ccomb
predictable range of correlated torque over which a tool performs, encompassing 99,73 % or more of all
possible correlated torque readings, taken on a range of joints of varying torque rates from a defined high
torque rate through a defined low torque rate
NOTE For the practical purposes of this Technical Specification, combined correlated torque scatter of a tool is the
total probable range of torque of a tool run on all joints used in practice at the same setting of the tool torque adjustment. It
is calculated according to 5.2.
3.7.9
correlated torque scatter as a percentage of combined mean correlated torque
single numerical value designating the correlated torque capability of a tool run on joints of varying torque rate,
from a defined high torque rate through a defined low torque rate at the same setting of the tool torque
adjustment
NOTE The correlated torque scatter as a percentage of combined mean correlated torque is calculated according
to 5.2.
3.7.10
test torque
T
T
torque level at which the tool's correlated torque scatter capability is determined, e.g., the torque level at
which the test is carried out
3.7.11
upper test torque
test torque equal to the upper limit of the defined torque adjustment range over which a tool's correlated
torque scatter capability is determined as described in 4.3.3.2
3.7.12
lower test torque
test torque equal to the lower limit of the defined torque adjustment
...