ASTM D2877-70

Methods of Test for Measuring Frictional Properties of Slideway Lubricants (Withdrawn 1974)

General Information

• Status: Withdrawn
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants

Standards Content (Sample)

~~l~ Designation: D 2877 - 70
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\!:!:!:,) Designation: 283/72T
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Standard Method for
MEASURING FRICTIONAL PROPERTIES OF
1
SLIDEWAY LUBRICANTS
This Standard is issued under the fixed designation D 2877; the number immediately following the designa­
tion 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.
1. Scope sliding with stick-slip action, implies poor
performance in slideways.
2
1.1 This method describes a procedure for
making an evaluation of the antifriction
4. Apparatus
characteristics of lubricating oils used on
machine tool slideway bearings by means of
4.1 Stick-Slip Machine,8 as shown in Fig. 1
a stick-slip apparatus.
or 2.
NoTE 1-The values stated in U.S. customary
units are to be regarded as standard.
S. Materials
5.1· Set of Test Blocks, schem11tically shown
2. Summary of Method
in Fig. 3. Materials, manufacturing procedure,
and break-in procedure are covered in Ap­
2.1 The test consists of slowly traversing a
pendix Al.
base block beneath a top block under a
49.5-lb (22.45-kg) total load with the oil 5.2 Oil, with known stick-slip number.
sample between the blocks. Deflection re­
NoTE 3-Fluid TDL-XI-5-1 or TDL-XI-5-2,
used in cooperative testing covered in Table Al,
sulting from kinetic thrust force is observed
is suitable.
while the block is moving from right to left
and from left to right. Deflection resulting
5.3 Alcohol, denatured, conforming to
from static thrust force is observed after this
Formula 30 or 3A of the U.S. Bureau of
movement is terminated. The magnitude of
Internal Revenue.
deflection is determined by dial indicators
5.4 Chlorothene (1,1,J-Trichloroethane), io-
mounted on the apparatus. From the deflec­
dustrial grade.
tion readings, the static coefficient of friction
5.5 Lintless Tissue or absorbent cotton.
( U ), kinetic coefficient of friction ( Uk) and
8 5.6 Medicine Dropper.
stick-slip number (U,JUk) are calculated.
5.7 Timer, graduated in seconds.
NoTE 2-The static friction measured is not
the usual breakaway force, but is the motion­
resisting force 1 min after the motor is turned off.
1
This method is under the jurisdiction of ASTM
Committee D-2 Petroleum Products and Lubri­
cants.
3. Significance
Effective Sept. 11, 1970.
2
Merchant, M. E., "Characteristics of Typical
3.1 The stick-slip test is used to determine
Polar and Non-Polar Lubricant Additives Under
the frictional characteristics of slideway oils.
Stick-Slip Conditions," Lubrication Engineering,
Results obtained by the test method described
LUENA, Vol 2, No. 2, June, 1946, pp. 66-61.
8
Test machines manufactured by Cincinnati
have been found to correlate closely with the
Milling Machine Co., Cincinnati, Ohio (Method A),
performance of lubricants on slides operating
and by Laboratory Equipment Corp., Mooresville,
at speeds of less than 6 in. (152.4 mm)/min.
Ind. (Method B), have been found satisfactory for
In this test, a high stick-slip number, or
this purpose.

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~m~ D 2877 - ® 283/72
METHOD A 30 lb (13.6 kg). Total load = 30 lb + 4.5 lb
tare (13.6 + 2.0 kg).
6. Preparation of Apparatus
6.3.2 Clamp the base block holder to the
table by tightening the base block holder
6.1 Cleaning Test Blocks:
clamping bolts (Fig. 1, Items 8 and 9).
6.1.1 Apply alcohol. Dry with lintless
6.3.3 Run the table to the right by pushing
tissue or absorbent cotton. Repeat.
the "Run Right" button on the control panel.
6.1.2 Apply chlorothene. Dry with lintless
Watch closely the deflection indicator (Fig. 1,
tissue or absorbent cotton (Note 4). Repeat
Item 10) on the right side. When a deflection
until all traces of dirt and oil are removed.
reading corresponding to a kinetic coefficient
Remove any traces of lint with dry compres­
of friction within the range 0.30 to 0.50 is
sed air.
reached, stop the table (Note 6). If a coeffi­
NOTE 4-Do not allow the chorothene to
cient of friction within this range is not
evaporate from the blocks. It should be absorbed
reached, clean the blocks and retest, with the
by the tissue or cotton.
table running in the opposite direction and
6.2 Assembly of Apparatus:
observing the deflection indicator on the left
6.2.1 Place base block (Fig. 1, Item 1) in
side. Repeat until the above range of coeffi­
base block holder (Fig. 1, Item 2) so that it is
cient of friction is obtained, indicating satis­
centered and the stamped arrow is to the
factorily clean test blocks.
front and pointing upward.
6.2.2 Insert the right and left actuating NoTE 6-Kinetic coefficient of friction, Uk =
rods (Fig. 1, Items 3 and 4) in their respec­
spring deflection X spring rate
tive housings.
total load
6.2.3 Place the top block (Fig. 1, Item 5)
on the base block so that the stamped arrow
Using Method A, Uk =
is to the front and pointing down
...