ASTM D3474-90(1997)

Standard Practice for The Calibration and Use of Torque Meters Used in Packaging Applications

SCOPE
1.1 This practice covers the calibration and use of torque meters of the type normally used in packaging applications.
1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-1998
• Technical Committee: D10 - Packaging

Relations

• Replaced By: ASTM D3474-90(2002) - Standard Practice for The Calibration and Use of Torque Meters Used in Packaging Applications
• Effective Date: 10-Jan-1990

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: D 3474 – 90 (Reapproved 1997)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Practice for
The Calibration and Use of Torque Meters Used in
Packaging Applications
This standard is issued under the fixed designation D 3474; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope trically on the platform of the tester. If the platform itself is
suitable, an adapter is not necessary. The adapter should be of
1.1 This practice covers the calibration and use of torque
such diameter that its radius multiplied by appropriate weights
meters of the type normally used in packaging applications.
1 1
will give torque values equal to ⁄4, ⁄2, and full-scale meter
1.2 This standard does not purport to address all of the
readings. (Typical devices for packaging applications have
safety concerns, if any, associated with its use. It is the
ranges from: 0 to 10, 0 to 25, 0 to 50, and 0 to 100 lbf-in. (0
responsibility of the user of this standard to establish appro-
to 1.13, 0 to 2.8, 0 to 5.7, and 0 to 11.3 N/m, respectively).
priate safety and health practices and determine the applica-
6.2 Connecting Means—A very flexible, thin filament, such
bility of regulatory limitations prior to use.
as a wire or fishing line that transmits the force of hanging
2. Referenced Documents
weights to the circumference of the adapter.
6.3 Pulley, low friction, used to change the direction of the
2.1 ASTM Standards:
connecting means from horizontal to vertical.
D 3198 Test Method for Application and Removal Torque
6.4 Appropriate Dead Weights, for example: 2, 4, and 7-lb
of Threaded or Lug-Style Closures
(0.9, 1.8, and 3.2-kg) for a torque meter with a 7 in. (178 mm)
3. Terminology
diameter plate or platform and a range of 0 to 25 in-lbs (0 to 2.8
N-m).
3.1 Definitions—For definitions of application torque and
removal torque, see Test Method D 3198.
3.2 stripping torque—a force or system of forces acting in a 7. Calibration Procedures
tightening direction that causes overrunning of the threads or
7.1 Spring-Loaded Type Testers (See Fig. 1) :
rotation of an overshell with respect to its supporting member.
7.1.1 Verify that the meter needle moves freely throughout
its entire range and rests on zero when not loaded. Adjust if
4. Summary of Practices
necessary.
4.1 Calibration—Reference torque values are obtained by
7.1.2 If an adapter is used, fasten it securely and concentri-
means of vertically suspended dead weights acting at specific
cally to the tester platform or spindle.
distances from the axis of the mounting platform of the tester.
7.1.3 Secure the torque meter to a table or work surface.
4.2 Use—Torque values to apply or remove closures are
7.1.4 Secure one end of the connecting means to a point on
obtained by mounting containers on the platform and either
the circumference of the adapter or rotating platform and wrap
applying or removing the closures. In some applications, the
it at least halfway around the circumference.
closure is mounted on the platform and the container is rotated.
7.1.5 Run the connecting means over a low friction pulley
located near the edge of a bench or table, and let it hang
5. Significance and Use
vertically for the attachment of weights.
5.1 This practice can be used to check devices used to
7.1.6 Sequentially, attach dead weights appropriately to give
measure the application and removal torques of continuous or
1 1
torque values equal to ⁄4, ⁄2, and full-scale meter readings.
intermittent thread and lug closures.
Make certain that the weights are hanging freely. Record the
5.2 This practice can be used to determine the amount of
weight, radius and the meter reading at each test point, making
torque to either apply or remove a closure.
certain that the needle returns to zero when the weights are
removed.
6. Apparatus
7.1.7 If the difference between the measured and indicated
6.1 Adapter—A circular plate that can be mounted concen-
readings differ from the manufacturers’ specification (usually
64 % of full scale), the user will need to generate a calibration
This practice is under the jurisdiction of ASTM Committee D-10 on Packaging
chart or have the instrument repaired.
and is the direct responsibility of Subcommittee D10.32 on Consumer Packages.
7.1.8 For torque meters that measure both clockwise and
Current edition approved Jan. 10, 1990. Published March 1990. Originally
counterclockwise, repeat 7.1.6, but with the platform rotation
published as D 3474 – 76. Last previous edition D 3474 – 80e .
Annual Book of ASTM Standards, Vol 15.09. in the opposite direction.
NOTICE:¬This¬standard¬has¬either¬been¬superseded¬and¬replaced¬by¬a¬new¬version¬or
discontinued.¬Contact¬ASTM¬International¬(www.astm.org)¬for¬the¬latest¬information.¬
D 3474
FIG. 1 Torque Meter Calibration Set Up
7.2 Automatic Type Testers: smoothly at a constant rate in a tightening direction to a
7.2.1 Attach a small flexible string at least halfway around predetermined level and then releasing the component gripping
the circumference of the platform and over a low friction device immediately upon reaching the predetermined torque.
pulley so that calibration we
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