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NSK Technology for Machine Tools

High-Speed and Low-Noise Ball Screws BSS Series

The ideal next-generation ball screws for light-load machine tools >> CAT. No.E3229
achieving high speed, low noise and compact size.

Redesigned ball circulation mechanism meets demand for even higher speeds Noise level comparison (Microphone located at a distance of 400 mm)
than the HMD Series; BSS Series offers outstanding low-noise performance in
machine tools and other machinery incorporating ball screws. 90

1. Low noise Noise level, dB 85 Average value,
NSK conventional models
New ball circulation method ensures low-noise performance by reducing noise level by
6 dB, corresponding to an approximately 50% reduction in audible noise. 80

2. High speed 75

BSS Series ball screws can operate at super high speeds of 200 m/min, an outstanding
performance compared to other ball screws.

3. Compact design

Ball nut outer diameter is 30% smaller than NSK’s conventional models. Compact body
allows low-profile table driving.

70 High-Speed and
Low-Noise Ball Screws
65
1.E+06
60
1.E+05

Dw·dm·N

High-Accuracy and High-Rigidity NSK Linear Guides High-Accuracy Series

Optimally designed ball circulation mechanism reduces vibration >> CAT. No.E3329
generated by the passage of steel balls to 1/3. Ball guides
specifically designed for super high-speed machine tools or
measuring equipment.

NSK’s High-Accuracy Series linear guides were developed to provide rolling
guides with motion accuracy equal to or better than that achieved by hydrostatic
guides and sliding guides currently in vogue for high-speed machine tools. High
motion accuracy and rigidity are realized by providing an extra long bearing to
improve machinery motion accuracy.

1. High-accuracy rail

Pitch of mounting holes is 1/2 that of conventional models to reduce rail deformation, and
NSK’s ingenuity is evident in mounting holes that prevent rail deformation.

2. High rigidity

Rigidity is further improved by increasing the number of steel balls while maintaining
low friction.

3. Compact design

Downsizing of machine tools and equipment can be realized while maintaining high-load
capacity. Further downsizing is made possible by combining with BSS Series
ball screws.

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