Ball screw cylindrical single nut ZEM-E-S 20x20Rx3.5-3 - Bosch Rexroth R151217052

On a ball screw assembly with a nominal screw diameter of 20 mm and a 20 mm lead (right-hand), this cylindrical single nut ZEM-E-S is the driven nut: every turn of the screw moves the attached machine part by 20 mm, with a dynamic load capacity of 16000 N. The cylindrical body is fitted into a holder, for example the aluminium nut housing MGA intended for ZEM-E-S, ZEM-E-K and ZEM-E-A nuts.

It belongs to the Bosch Rexroth standard series. Permissible values are up to 120 m/min linear speed and operating temperatures from -10 °C to +80 °C.

Benefits

• Load capacities: dynamic C = 16000 N, static C0 = 18800 N (valid for tolerance grades T3 and T5)
• 20 mm lead, right-hand: 20 mm travel per screw revolution
• 3 ball track turns with 3.5 mm balls
• Standard seal fitted at the factory keeps dirt off the ball track
• Matches the MGA nut housing made of aluminium
• Linear speed up to 120 m/min, operation from -10 °C to +80 °C

Installation note

The nut only runs on a screw of the same nominal size 20 x 20R x 3.5 - 3. 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.