ASTM D3336-97(2002)e1

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
An American National Standard
e1
Designation:D3336–97 (Reapproved 2002)
Standard Test Method for
Life of Lubricating Greases in Ball Bearings at Elevated
Temperatures
This standard is issued under the fixed designation D 3336; 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.
This standard has been approved for use by agencies of the Department of Defense.
e NOTE—Warning notes were editorially moved into the standard text in March 2003.
1. Scope ball bearings operating under light loads at high speeds and
elevated temperatures.
1.1 This test method covers the evaluation of the perfor-
mance of lubricating greases in ball bearings operating under
5. Apparatus
light loads at high speeds and elevated temperatures.
5.1 Test Spindle (see Figs. 1-4 ), capable of operating at
1.2 The values stated in inch-pound units are to be regarded
speeds of 10 000 rpm and temperatures as high as 371°C
as the standard. The metric equivalents of inch-pound units
(700°F). The test bearing seat dimension shall be 19.99 to
may be approximate.
20.00 mm (0.7870 to 0.7874 in.). For spindles having the test
1.3 This standard does not purport to address all of the
bearing and the support bearing in the same housing (CRC
safety concerns, if any, associated with its use. It is the
Type, Figs. 1-3)(Note 2) the internal construction of the
responsibility of the user of this standard to establish appro-
spindle shall be such that the outboard support bearing, or both
priate safety and health practices and determine the applica-
bearings are free to float axially in the housing. In designs
bility of regulatory limitations prior to use. For specific hazard
where both bearings are free to float, the spindle shaft shall
statements, see 8.1.
have a 0.508 to 0.762 mm (0.020 to 0.030 in.) free axial
2. Referenced Documents movement or end play. The outboard bearing seat dimension
should be 19.99 to 20.00 mm (0.7870 to 0.7874 in.).
2.1 ASTM Standards:
5.1.1 The test unit design (Fig. 1 and Fig. 2) should be such
D 235 Specification for Mineral Spirits (Petroleum Spirits)
2 that a finger spring washer produces a 22 to 67 N (5 to 15 lbf)
(Hydrocarbon Dry Cleaning Solvent)
thrust load on the floating outboard support bearing.
2.2 ABMA Standard:
5.2 Bearing Housing:
Standard 4, Tolerance Definitions and Gaging Practices for
5.2.1 For CRC Type Spindles—The bearing housing diam-
Ball and Roller Bearings
eter shall be 47.005 to 47.021 mm (1.8506 to 1.8512 in.) to
3. Summary of Test Method
give proper bearing mounting. Construction shall be such that
the test bearing is equipped with flush spacers or shields to
3.1 A grease lubricated SAE No. 204 size ball bearing is
confine the grease to the bearing. The spacers or shields shall
rotated at 10 000 rpm under light load at a specified elevated
have a clearance between the inside diameter and the shaft of
temperature. Tests are continued until failure or completion of
0.127 to 0.178 mm (0.005 to 0.007 in.) per side.
a specified number of hours of running time.
NOTE 1—This type of spindle is described in CRC Research Technique
4. Significance and Use
4.1 This test method can be used to evaluate the ability of
grease to provide adequate lubrication for extended periods of
Complete apparatus is available from Falex Corp., 1020 Airpark Dr., Sugar
Grove, IL 60554.
Pope Machinery Corporation GreaseTest Spindles No. P-1911 or P-6301A-HT
This test method is under the jurisdiction of ASTM Committee D02 on (Fig. 1) and No. P-7605-B (Fig. 2); and Falex Corp. spindles of the type shown in
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee Fig. 1 and Fig. 2 have been found satisfactory for this purpose.
D02.G0 on Lubricating Grease. Falex Part No. 643-187-070 has been found satisfactory. The sole source of
Current edition approved Dec. 10, 2002. Published April 2003. Originally supply of the apparatus known to the committee at this time is Falex Corp. 1020
approved in 1975. Last previous edition approved in 1997 as D 3336 – 97. AirparkDr.,SugarGrove,IL60554.Ifyouareawareofalternativesuppliers,please
Annual Book of ASTM Standards, Vol 06.04. provide this information to ASTM Headquarters. Your comments will receive
3 1
Available fromAmerican Bearing ManufacturersAssoc., 2025 M St., NW, Ste careful consideration at a meeting of the responsible technical committee, which
800, Washington, DC 20036. you may attend.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
e1
D3336–97 (2002)
FIG. 1 Test Spindle (Both Bearings Floating)
FIG. 2 Test Spindle (with Radial Load)
for the Determination of Performance Characteristics of Lubricating
Athrust load of 22 62N(5 6 0.55 lbf) shall be applied to the
Grease in Antifriction Bearings at Elevated Temperature (CRC Designa-
outerraceofthebearingbymeansofahelicalspringcalibrated
tions L-35-54 and CRC L-35-62).
at room temperature.
5.2.2 For Navy Type Spindles (Test Bearing Mounted Out- 5.3 Motor Drive Assembly—Spindle bracket and constant
belt tension motor drive assembly capable of providing spindle
side Spindle Housing)—The bearing housing shall be con-
speeds up to 10 000 6 200 rpm by means of an endless belt.
structed of material similar to that of the test bearing and shall
The motor shall be mounted so that a belt tension of approxi-
be tempered to retain dimensional stability at temperatures up
mately 67 N (15 lbf) can be maintained on the test spindle
to 371°C (700°F). Internal diameter shall be 47.005 to 47.021
pulley.
mm (1.8506 to 1.8512 in.). The housing cover shall be flush
5.4 Oven, removable, capable of producing a test tempera-
fitting to confine the grease to the bearing. Provision shall be
ture of 371°C (700°F) within 1 ⁄2 h.
made for insertion in the housing of one or two small
thermocouples which shall lightly press on and be in continual 5.5 Control Equipment:
contact with the outer race of the test bearing. The housing
5.5.1 The temperature at the outside diameter of the test
shall be fitted with lugs to accommodate a yoke and added
bearing shall be maintained within 3°C (5°F) of the specified
weight so that a radial load may be applied to the test bearing. test temperature. The temperature control equipment shall be
e1
D3336–97 (2002)
FIG. 3 Test Spindle Thrust Load Design
FIG. 4 G-III-54 Grease Life, Hours to Failure
adequate to maintain the temperature at the outer race of the temperature. The oven temperature shall be controlled by
test bearing within the limits specified by control of the oven means of a thermocouple placed in the oven cavity.
e1
D3336–97 (2002)
5.5.2 Suitable equipment such as adjustable reset relay and makingsurethatthegreasedoesnotextendbeyondthefacetof
overload device for shutting off oven heaters and drive motor the races. For CRC Type spindles the support bearing shall be
and other accessory equipment (timer, recorder, etc.) shall be packed full.
provided. Oven temperature as well as bearing temperature 8.3 Assemblethetestbearing,supportbearing,andZ-spring
should be recorded. (see Fig. 1 and Fig. 2) on the spindle and fix the thermocouples
into position so that it is in contact with the outer race of the
6. Materials
test bearing (CRC Type spindles). For tests at 232°C (450°F)
6.1 Test Bearing, SAE No. 204 size, fabricated from heat-
and above, replace the finger spring washer for each test. For
resistant steel, suitable for temperatures as high as 371°C Navy Type spindles insert the test bearing into the housing and
(700°F).ThebearingshallbemanufacturedtoABEC-3quality,
pressthebearingontothespindlebyapplicationofalightforce
having a radial clearance of from 0.025 to 0.031 mm (0.0010 on the inner race. Place the cover plate in position, fix the
to 0.0012 in.). See Annex A1 which describes ABMA’s
thermocouples into position, and apply the radial and thrust
standard method of measuring radial internal clearances of ball loads.
bearings. The bearing shall be equipped with a ball retainer
9. Procedure
fabricated from suitable material capable of withstanding
temperatures as high as 371°C (700°F). Support bearings of
9.1 Rotate the bearing by hand for approximately 100
CRC Type spindles shall be identical to the test bearings.
revolutions in each direction at a speed not exceeding 200 rpm.
Start the drive motor and heater simultaneously and adjust the
NOTE 2—Bearingsfabricatedfrom18-4-1highspeedorM-10toolsteel
temperature controller to raise the bearing to test temperature
with retainers fabricated from heat-treated silver-plated beryllium copper
have been found satisfactory for this purpose. Alternatively, for testing at within 1 ⁄2 h. After two hours of test operation at speed and
temperaturesof149°C(300°F)andbelow,ASTMTestBearingsSize6204
control temperature, measure the temperature of the outer race
(PCN 12-433360-12)ABEC-3 has been found satisfactory.This bearing is
o
...