ASTM F1046-01

Standard Guide for Preparing Artificially Worn Passenger and Light Truck Tires for Testing

SIGNIFICANCE AND USE
Tires having reduced groove depth are required in some tire tests to determine changes in performance as a tire wears in service. This guide describes the preparation of artificially worn tires. This guide is not meant to replace the development of worn tires through over-the-road travel when naturally worn tires are required. Further refinements of these techniques may be made with increased field experience.
The amount of tread rubber to be removed (groove depth reduction) and the final surface texture are selected according to the requirements of a particular testing program.
The type of test program determines the actual tolerance necessary on the final groove depth. For example, snow traction will require very close control of the final groove depth while vehicle handling tests can accommodate a wider tolerance on the final groove depth.
SCOPE
1.1 This guide outlines the preparation of artificially worn tires by tread rubber removal (cutting or grinding, or both) for subsequent performance testing. The purpose is to permit the preparation of test tires with a uniformly reduced tread groove depth and tread geometry that will yield repeatable test results while avoiding the time-consuming and costly over-the-road natural wearing of tires.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 This standard does not purport to address all of the safety concerns, 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: 09-Oct-2001
• ICS: 83.160.10 - Road vehicle tyres
• Technical Committee: F09 - Tires
• Drafting Committee: F09.20 - Vehicular Testing

Relations

• Replaces: ASTM F1046-93(1997)e1 - Standard Guide for Preparing Artificially Worn Passenger and Light Truck Tires for Testing
• Effective Date: 10-Oct-2001
• Replaced By: ASTM F1046-01(2008) - Standard Guide for Preparing Artificially Worn Passenger and Light Truck Tires for Testing
• Effective Date: 01-Oct-2008
• Referred By: ASTM F1649-20 - Standard Test Methods for Evaluating Wet Braking Traction Performance of Passenger Car Tires on Vehicles Equipped with Anti-Lock Braking Systems
• Effective Date: 10-Oct-2001
• Referred By: ASTM F1805-20 - Standard Test Method for Single Wheel Driving Traction in a Straight Line on Snow- and Ice-Covered Surfaces
• Effective Date: 10-Oct-2001
• Referred By: ASTM F1572-21 - Standard Test Methods for Tire Performance Testing on Snow and Ice Surfaces
• Effective Date: 10-Oct-2001

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: F 1046 – 01
Standard Guide for
Preparing Artificially Worn Passenger and Light Truck Tires
1
for Testing
This standard is issued under the fixed designation F 1046; 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 intervals around the circumference to provide a visual indica-
tion that most of a tread has been worn away.
1.1 This guide outlines the preparation of artificially worn
3.1.5 void, n—a volume (in the tread band) defined by the
tires by tread rubber removal (cutting or grinding, or both) for
lack of rubber; the depth dimension of this volume may vary
subsequent performance testing. The purpose is to permit the
from point to point in on the tread band.
preparation of test tires with a uniformly reduced tread groove
depth and tread geometry that will yield repeatable test results
4. Summary of Guide
while avoiding the time-consuming and costly over-the-road
4.1 This guide outlines a method for groove depth measure-
natural wearing of tires.
ment and for reduced groove depth calculation followed by
1.2 The values stated in SI units are to be regarded as the
removal of a calculated amount of tread rubber and for final
standard. The values given in parentheses are for information
surface grinding to obtain a smooth finish. An optional tire
only.
break-in period to follow this operation is described. Tech-
1.3 This standard does not purport to address all of the
niques for photography and measurements to document the
safety concerns, if any, associated with its use. It is the
final tread characteristics are described.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use.
5.1 Tires having reduced groove depth are required in some
tire tests to determine changes in performance as a tire wears
2. Referenced Documents
in service. This guide describes the preparation of artificially
2.1 ASTM Standards:
worn tires. This guide is not meant to replace the development
F 421 Test Method for Measuring Groove and Void Depth
2 of worn tires through over-the-road travel when naturally worn
in Passenger Car Tires
tires are required. Further refinements of these techniques may
F 762 Test Method for Determining Change in Groove (or
be made with increased field experience.
Void) Depth With Distance Traveled for Passenger Car
2 5.2 The amount of tread rubber to be removed (groove
Tires
depth reduction) and the final surface texture are selected
3. Terminology according to the requirements of a particular testing program.
5.3 The type of test program determines the actual tolerance
3.1 Definitions:
necessary on the final groove depth. For example, snow
3.1.1 groove, n—a void that is relatively narrow (compared
tractionwillrequireveryclosecontrolofthefinalgroovedepth
to its length).
while vehicle handling tests can accommodate a wider toler-
3.1.2 groove average depth [L], n—the average of all tire
ance on the final groove depth.
groove depth measurements in a single groove.
3.1.3 groove (void) depth, [L], n—a measurement of the
6. Apparatus
perpendiculardistancefromarealorcalculatedreferenceplane
6.1 Tread Depth Gage, meeting the requirements of Test
defined by edges of two adjacent ribs (lugs) to the lowest point
Method F 421.
of contact in the groove (void).
6.2 Equipment, for determining tread radius.
3.1.4 treadwear indicator, n—a raised portion of a groove
6.3 Tire Tread Removal Machine, with accessories to re-
bottomoravoidbottomthatismoldedinatireatfairlyregular
move tread rubber in a predetermined manner.
1
7. Procedure
This guide is under the jurisdiction of ASTM Committee F09 on Tires and is
the direct responsibility of Subcommittee F 09.20 on Vehicular Testing.
7.1 Method Selection—The actual method utilized deter-
Current edition approved Oct. 10, 2001. Published December 2001. Originally
e1 mines the accuracy and uniformity of the final groove depth.
published as F 1046 - 87. Last previous edition F 1046 - 93 (1997) .
2
Annual Book of ASTM Standards, Vol 09.02. With equipment monitoring the tread surface relative to the
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F1046–01
axis of wheel rotation, a tolerance of 60.51 mm (60.020 in.) left by the finish grinder and simulate, as closely as possible,
is obtainable with most existing equipment. For other equip- the surface texture of a naturally worn tire. If it is known that
ment th
...