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P. 5
HTF-SRC Type
High-speed performance Noise reduced by 6 dB (A)
two times greater than or more compared with
existing products return tube type
Accuracy grade
Ct7 of JIS B 1192 (1997) is applicable as the standard
accuracy grade.
Axial play
Standard axial play: 0.020 mm or less, or 0.050 mm or less
Other
Please consult NSK for special requests.
Examples: • Add a recirculation circuit to increase the load capacity.
• Position all recirculation circuits on the same phase of
ball nut circumference.
2 Design Precautions
1) When designing the shaft ends, one end of the screw shaft must meet one of the
following conditions. If not, we cannot install the ball nut on the screw shaft.
• The ball groove is cut through to the shaft end.
• T he diameters of bearing journals and the gear or pulley seat must be less than
the root diameter of ball groove “dr” specified on the dimension table.
2) Please consult NSK with your special design requirements.
3 Selection of Ball Screw
• P lease refer to pages 33 and 34 for details on the operating life of the ball screw and instructions on
installation and lubrication.
• Please consult NSK in the case of a short stroke operation less than or equal to four times the length of
the ball screw lead.
4 Operating Temperature
• Maximum operating temperature: 70°C (at outside diameter of ball nut)
