PRESS2010_EN

1028/1208

H1ttHHttD234HH5D＝hgnel tcanoCD＝hgnel tcanoC1026The ball bearing cage between guide bushing and guide post drives the set to move along the stroke of mold, so the position of ball bearing cage at bottom dead centre has to be considered when choosing the length of post.Recommended heightUpper limit of heightLower limit of heightAt this height, the max. contact length of post, bushing and ball bearing cage is maintained and the highest rigidity is achieved. It should be considered during die design.The height at the contact length of post, bushing and ball bearing cage is the same as the diameter of guide post. Upper contact limit is achieved in this position when taking rigidity into consideration, and operation below this height is recommended.For long guide post, shorten the contact length to the post diameter D according to the stroke of die. Operation below this height is not recommended when taking rigidity into consideration.For short guide post, the height of ball bearing cage is the same as the spring solid height before reaching stage ③. And the safety value must be considered during die design.For short guide post, it is the height when guide bushing reaches the holder before ball bearing cage reaches stage ③,and the safety value must be considered during die design.Main pointConditionSpring solid heightContactNo.The consideration for position of bottom dead centreThe position of bottom dead centreHow to Select the Length of Ball Bearing Guide Post