Ball screw zero-clearance adjustable single nut SEM-E-S 25x5Rx3-4 - Bosch Rexroth R151221014

On a ball screw assembly with a nominal screw diameter of 25 mm and a 5 mm lead (right-hand), this zero-clearance adjustable single nut SEM-E-S is the driven nut: every turn of the screw moves the attached machine part by 5 mm, with a dynamic load capacity of 19100 N. It is supplied with standard axial clearance; as an adjustable design, the clearance can be set to zero during assembly. The matching housing is the MGS steel housing, hole pattern BB7.

It belongs to the Bosch Rexroth standard series. Permissible values are up to 30 m/min linear speed and operating temperatures from -10 °C to +80 °C.

Benefits

• Load capacities: dynamic C = 19100 N, static C0 = 27200 N (valid for tolerance grades T3 and T5)
• 5 mm lead, right-hand: 5 mm travel per screw revolution
• 4 ball track turns with 3 mm balls
• Standard seal fitted at the factory keeps dirt off the ball track
• Hole pattern BB7, matches the MGS nut housing
• Linear speed up to 30 m/min, operation from -10 °C to +80 °C

Installation note

The nut only runs on a screw of the same nominal size 25 x 5R x 3 - 4. A complete axis also needs fixed and floating bearings for the screw ends in the matching diameter; the fixed bearing is secured with a slotted nut.