A new method of reducing the noise of the linear guideway type recirculating linear ball bearing (linear bearing) was studied. In the experiments, the overall sound pressure levels of linear bearings with steel balls or ceramic Si3N4 balls were measured, and sound frequency analyses were carried out. Moreover, based on the assumption that the main cause of the noise may be the collision between the ball and the carriage, the overall sound pressure levels of the linear bearings were analyzed combining the Hertzian theory and the results of previous studies on collision sound. From the results of experiments and analyses, the conclusions were obtained as follows: (1) The overall sound pressure level of the linear bearing with steel balls can be reduced by about 4.5 dB by using Si3N4 balls having the same diameter; (2) The overall sound pressure levels of linear bearings with steel balls or ceramic Si3N4 balls were both increased by about 9.8 dB as the linear velocity increased an octave; and (3) The analytical results, based on the assumption that the main cause of the noise emitted from the linear bearings is the collision between the ball and the carriage, match the experimental results well.

1.
Otsuka, J., 2000, Present and Future Technology of Ultraprecision Positioning, Fuji Technosystem, Tokyo.
2.
Kasai
,
S.
,
Tsukada
,
T.
,
Osawa
,
N.
, and
Kato
,
S.
,
1985
, “
Precision Linear Guides
,”
NSK Technical Journal
,
645
, pp.
49
59
, ISSN 0911–4920.
3.
Teramachi, A., 2000, Introduction to Linear Systems, The Nikkan Kogyo Shimbun, Tokyo.
4.
Yamaguchi
,
H.
, and
Ohkubo
,
T.
,
2001
, “
Development of NSK S1 Series™ Ball Screws and Linear Guides
,”
Motion & Control
,
11
, pp.
27
34
, ISSN 1342–3630.
5.
Yamada, S., Hamano, M., and Ooshima, N., 1986, “A Study on the Noise Emission from a Linear Motion Bearing,” Proceedings of the Meeting, the Inst. of Noise Control Engineering of Japan, pp. 5–8.
6.
Ohta
,
H.
,
1999
, “
Sound of Linear Guideway Type Recirculating Linear Ball Bearings
,”
ASME J. Tribol.
,
121
, pp.
678
685
.
7.
Ohta, H., and Kajita, T., 1996, “Drive Unit for Measurement of Vibration and Sound of Linear Motion Rolling Bearings,” An Examined Patent Publication (Japan), Publication No, 1996-101059.
8.
Fukuda, M., 1991, Handbook of Machine Noise, Sangyo Tosho Publishing, Tokyo.
9.
Okamoto, J., Nakayama, K., and Sato, M., 1996, Introduction to Tribology, Third Edition, Saiwai Shobo, Tokyo.
10.
Timoshenko, S. P., and Goodier, J. N., 1982, Theory of Elasticity, Third Edition, McGraw-Hill Book, Singapore.
11.
Bra¨ndlein, J., Eschmann, P., Hasbargen, L., and Weigand, K., 1999, Ball and Roller Bearings: Theory, Design and Application, 3rd ed., John Wiley & Sons, Chichester.
12.
Igarashi
,
T.
,
Goto
,
M.
, and
Kawasaki
,
A.
,
1985
, “
Studies on Impact Sound (1st Report, The Sound Generated by a Ball Colliding with a Plate)
,”
Bull. JSME
,
28
(
235
), pp.
148
154
.
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