Transcription of INDEX [www.servomech.com]
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INDEX [www.servomech.com]
INDEX1. DESIGN Introduction .. page 1 ball track profi le .. page 1 ball recirculating .. page 2 Backlash or preload .. page 3 Accuracy grade .. page 5 Thread lead accuracy .. page 52. SELECTION OF ball SCREWS Introduction .. page 8 Basic rating life .. page 10 Basic dynamic axial load rating.
2 D w R s D w R R s s α α 2 w s D R = 2 w s D R < BALL SCREWS AND NUTS Dw - ball diameter Rs - ball track radius α - contact angle The round profi le (see Figure 2.a): the zone of contact between the ball and the ball track, where signifi - cant effects of sliding are present, is quite wide; consequences of sliding are a high wear of bodies in
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