Abstract

As machines become smaller, friction plays an increasingly important role in their performance. Although friction is a well-studied phenomenon, few studies have been performed on bushings and shafts with loads of a few tens of mN and dimensions of a few mm. In this work, the static friction coefficient is investigated for a miniature steel shaft rotating in bronze SAE 40 bushings. A new approach is presented to measure the static friction coefficient of a miniature bushing. The coefficient was evaluated without lubrication. It shows a linear dependence at loads higher than 152 mN and a nonlinear dependence at loads smaller than 152 mN.

Issue Section:
Research Papers
Keywords:
micromechanics, miniaturization, bushing, static friction coefficient, micro friction, low loads

References

1.
Trimmer
,
W. S.
,
Micromechanics and MEMS Classic and Seminal Papers to 1990
,
IEEE Press
,
New York
,
1996
.
2.
Kussul
,
E. M.
,
Rachkovskij
,
D. A.
,
Baidyk
,
T. N.
, and
Talayev
,
S. A.
, “
Micromechanical Engineering: A Basis of the low Cost Manufacturing of Mechanical Microdevices Using Microequipment
,”
J. Micromech. Microeng.
, Vol.
6
, No.
4
,
1996
, pp.
410
–
425
. https://doi.org/10.1088/0960-1317/6/4/008
Google Scholar
Crossref
Search ADS
 
3.
Kussul
,
E.
,
Baidyk
,
T.
,
Ruiz-Huerta
,
L.
,
Caballero
,
A.
,
Velasco
,
G.
, and
Kasatkina
,
L.
, “
Development of Micromachine Tool Prototypes for Microfactories
,”
J. Micromech. Microeng.
, Vol.
12
, No.
6
,
2002
, pp.
795
–
812
. https://doi.org/10.1088/0960-1317/12/6/311
Google Scholar
Crossref
Search ADS
 
4.
Feynman
,
R.
, “
There is Plenty of Room at the Bottom, In Micromechanics and MEMS
,”
Classic and Seminal Papers to 1990
,
Trimmer
 
W. S.
, Ed.,
IEEE Press
,
New York
,
1996
, pp.
3
–
9
.
5.
Bharat
,
B.
 and
Kilkarni
,
A. V.
, “
Effect of Normal Load Microscale Friction Measurements
,”
Thin Solid Films
, Vol.
278
, Nos.
1–2
,
1996
, pp.
49
–
56
.
6.
Beerschwinger
,
U.
,
Reuben
,
R. L.
, and
Yang
,
S. J.
, “
Friction Study of Micromotor Bearing
,”
Sens. Actuators
, Vol.
63
, No.
3
,
1997
, pp.
229
–
241
. https://doi.org/10.1016/S0924-4247(97)80510-9
Google Scholar
Crossref
Search ADS
 
7.
Kim
,
D.
,
Cao
,
D.
,
Bryant
,
M. D.
,
Meng
,
W.
, and
Ling
,
F. F.
, “
Tribological Study of Microbearing for MEMS Applications
,”
J. Tribol.
, Vol.
127
, No.
3
,
2005
, pp.
537
–
547
. https://doi.org/10.1115/1.1924428
Google Scholar
Crossref
Search ADS
 
8.
Yoon
,
E.-S.
,
Arvind Singh
,
R.
,
Oh
,
H.-J.
, and
Kong
,
H.
, “
The Effect of Contact Area on Nano/Micro-Scale Friction
,”
Wear
, Vol.
259
, Nos.
7–12
,
2005
, pp.
1424
–
1431
. https://doi.org/10.1016/j.wear.2005.01.033
9.
Tambe
,
N. S.
 and
Bhushan
,
B.
, “
Scale Dependence of Micro/Nano-Friction and Adhesion of MEMS/NEMS Materials, Coating and Lubricants
,”
Nanotechnology
, Vol.
15
, No.
11
,
2004
, pp.
1561
–
1570
. https://doi.org/10.1088/0957-4484/15/11/033
Google Scholar
Crossref
Search ADS
 
10.
Neiderberger
,
S.
 and
Gracias
,
D. H.
, “
Transitions From Nanoscale to Microscale Dynamic Friction Mechanisms on Polyethylene and Silicon Surfaces
,”
J. Appl. Phys.
, Vol.
87
, No.
6
,
2000
, pp.
3143
–
3150
. https://doi.org/10.1063/1.372312
Google Scholar
Crossref
Search ADS
 
11.
Ünlü
,
B. S.
, “
Determination of Friction Coefficient in Journal Bearing
,”
Mater. Des.
, Vol.
28
,
2005
, pp.
973
–
977
.
Google Scholar
Crossref
Search ADS
 
12.
Colbert
,
R. S.
,
Alvarez
,
L. A.
,
Hamilton
,
M. A.
,
Steffens
,
J. G.
,
Ziegert
,
J. C.
,
Burris
,
D. L.
, and
Sawyer
,
W. G.
, “
Edges, Clearances, and Wear: Little Things That Make Big Differences in Bushing Friction
,”
Wear
, Vol.
268
, Nos.
1–2
,
2010
, pp.
41
–
49
. https://doi.org/10.1016/j.wear.2009.06.030
13.
Dickrell
,
D. J.
, and
Sawyer
,
W. G.
, “
Evolution of Wear in a Two-Dimensional Bushing
,”
Tribol. Trans.
, Vol.
47
, No.
2
,
2004
, pp.
257
–
262
. https://doi.org/10.1080/05698190490439175
Google Scholar
Crossref
Search ADS
 
14.
Gao
,
F.
,
Liu
,
R.
, and
Wu
,
X. J.
, “
Tribological Behavior of T-401/Tin–Bronze Composite Coating Deposited by HVOF on the Bushing of Planet Journals
,”
Wear
, Vol.
269
, Nos.
11–12
,
2010
, pp.
724
–
732
. https://doi.org/10.1016/j.wear.2010.07.009
15.
Mosleh
,
M.
,
Saka
,
N.
, and
Suh
,
N. P.
, “
A Mechanism of High Friction in Dry Sliding Bearing
,”
Wear
, Vol.
252
,
2002
, No.
1–2
, pp.
2
–
8
. https://doi.org/10.1016/S0043-1648(01)00583-X
16.
Kim
,
K.
, “
Design and Development of a High-Speed Bearing Test Appratus
,”
ASTM J. Test. Eval.
, Vol.
26
, No.
4
, pp
301
–
305
.
17.
Tevrüz
,
T.
, “
Tribological Behaviours of Bronze-Filled Polytetrafluoroethylene Dry Journal Bearing
,”
Wear
, Vol.
230
, No.
1
,
1999
, pp
66
–
69
. https://doi.org/10.1016/S0043-1648(99)00091-5
Google Scholar
Crossref
Search ADS
 
18.
Bouyer
,
J.
 and
Fillon
,
M.
, “
Experimental Measurement of the Friction Torque on Hydrodynamic Plain Journal Bearing During Start-Up
,”
Tribol. Int.
, Vol.
44
, Nos.
7–8
,
2011
, pp.
772
–
781
. https://doi.org/10.1016/j.triboint.2011.01.008
19.
Kim
,
H. J.
,
Park
,
I. K.
,
Young
,
H. S.
,
Kim
,
B. H.
, and
Hong
,
N. P.
, “
Wire Tension Method for Coefficient of Friction Measurement of Micro Bearing
,”
Int. J. Precis. Eng. Manuf.
, Vol.
15
, No.
2
, pp.
267
–
273
.
Crossref
Search ADS
 
20.
Rha
,
J. J.
,
Know
,
S. C.
,
Cho
,
J. R.
,
Yim
,
S.
, and
Saka
,
N.
, “
Creation of Ultra-Low Friction and Wear Surface for Micro-Devices Using Carbon Films
,”
Wear
, Vol.
259
, Nos.
1–6
,
2005
, pp.
765
–
770
. https://doi.org/10.1016/j.wear.2005.02.084
21.
Ku
,
I. S. Y.
,
Reddyhoff
,
T.
,
Choo
,
J. H.
,
Holmes
,
A. S.
, and
Spikes
,
H. A.
, “
A Novel Tribometer for the Measurement of Friction in MEMS
,”
Tribol. Int.
, Vol.
43
, Nos.
5–6
,
2010
, pp.
1087
–
1090
. https://doi.org/10.1016/j.triboint.2009.12.029
22.
Xu
,
Y.
,
Wang
,
J.
,
Yu
,
H.
,
Li
,
Y.
, and
Lv
,
H.
, “
Design and Analysis of the Apparatus for Meso-Scale Friction Force Testing
,”
Proceedings of the 2009 IEEE International Conference on Mechatronics and Automation
, Aug 9–12,
Changchun, China
,
2009
.
23.
Achata
,
S.
,
Liskiewics
,
T.
, and
Celis
,
J. P.
, “
Friction Mechanisms at the Micro-Scale
,”
Tribol. Int.
, Vol.
42
, Nos.
11–12
,
2009
, pp.
1792
–
1799
. https://doi.org/10.1016/j.triboint.2009.04.018
24.
Xu
,
Y.
,
Yu
,
H.
,
Yu
,
Z.
,
Xu
,
J.
, and
Shi
,
Q.
, “
Micro Friction Experimental Study Based on Parallel Cantilever
,”
Proc. Eng.
, Vol.
24
,
2011
, pp.
778
–
782
. https://doi.org/10.1016/j.proeng.2011.11.2736
Google Scholar
Crossref
Search ADS
 
25.
ASTM B505-89
:
Standard Specification for Copper-Based Alloy Continuous Casting
,
ASTM International
,
West Conshohocken, PA
,
1989
, http://www.astm.org.
26.
ASTM G115-93
:
Standard Guide for Measuring and Reporting Friction Coefficients
,
ASTM International
,
West Conshohocken, PA
,
1993
, http://www.astm.org.
27.
Yao
,
Z.
,
Zhang
,
Q.
,
Tao
,
Y.
, and
Zhang
,
X.
, “
A New Approach to Measure the Friction Coefficient of Micro Journal Bearing
,”
Tribol. Int.
, Vol.
33
, No.
7
,
2000
, pp.
485
–
489
. https://doi.org/10.1016/S0301-679X(00)00089-X
Google Scholar
Crossref
Search ADS
 
28.
Johnson
,
K. J.
,
Contact Mechanics
,
Cambridge University Press
,
Cambridge, UK
,
1985
.
Google Scholar
Crossref
Search ADS
 
29.
Whitehead
,
J. R.
, “
Surface Deformation and Friction of Metals at Light Loads
,”
Proc. R. Soc. Lond. Ser. A, Math. Phys. Sci.
, Vol.
201
, No.
1064
,
1950
, pp.
109
–
124
. https://doi.org/10.1098/rspa.1950.0046
30.
McFarlane
,
J. S.
 and
Tabor
,
D.
, “
Relation Between Friction and Adhesion
,”
Proc. R. Soc. Lond. Ser. A, Math. Phys. Sci.
, Vol.
202
, No.
1069
,
1950
, pp.
244
–
253
. https://doi.org/10.1098/rspa.1950.0097
31.
Ando
,
Y.
,
Ishikawa
,
Y.
, and
Kitahara
,
T.
, “
Friction Characteristics and Adhesion Force Under Low Normal Load
,”
J. Tribol.
, Vol.
117
, No.
4
,
1995
, pp.
569
–
574
. https://doi.org/10.1115/1.2831515
Google Scholar
Crossref
Search ADS
 
32.
Rymuza
,
Z.
 and
Pytko
,
S.
, “
The Effect of Scale in Tribological Testing
,”
J. Mater. Res. Technol.
, Vol.
1
, No.
1
,
2012
, pp.
13
–
20
. https://doi.org/10.1016/S2238-7854(12)70004-2
Google Scholar
Crossref
Search ADS
 
33.
Etsion
,
I.
 and
Amit
,
M.
, “
The Effect of Small Normal Loads on the Static Friction Coefficient for Very Smooth Surfaces
,”
J. Tribol.
, Vol.
115
, No.
3
,
1993
, pp.
406
–
410
. https://doi.org/10.1115/1.2921651
Google Scholar
Crossref
Search ADS
 
34.
Bowden
,
F.
 and
Tabor
,
D.
,
The Friction and Lubrication of Solids, Part II
,
Oxford University Press
,
Oxford, UK
,
1964
.
35.
Miyoshi
,
K.
, “
Solid Lubrication Fundamentals and Application
,”
NASA/TM-2000-107249
,
NASA, NASA Glenn Research Center
,
Cleveland, OH
,
2001
.
36.
Johnson
,
K. L.
,
Kendall
,
K.
, and
Roberts
,
A. D.
, “
Surface Energy and the Contact of Elastic Solids
,”
Proc. R. Soc. Lond. A
, Vol.
324
,
1971
, pp.
301
–
313
. https://doi.org/10.1098/rspa.1971.0141
37.
Rabinowicz
,
E.
, “
Influence of Surface Energy on Friction and Wear Phenomena
,”
J. Appl. Phys.
, Vol.
32
, No.
8
,
1961
, pp.
1440
–
1444
. https://doi.org/10.1063/1.1728375
Google Scholar
Crossref
Search ADS
 
38.
Rabinowicz
,
E.
,
Friction and Wear of Materials
, 2nd ed.,
Wiley
,
New York
,
1995
.
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