Page 20 of catalogue Ball screws of SKF Linearsysteme GmbH

Product information

SX/BX universal Screws

Standard

Recirculation

Customised

Rolled thread ball screw internal recirculation nut with threaded end.
Standard version: composite inserts Special version: steel inserts which can act as a safety device for severe requirements or vertical applications Contact us. • Nominal diameter 20 to 63 mm • Lead: 5 to 10 mm • Cylindrical body of minimum diameter to simplify assembly • Lubrication hole for nipple or automatic SKF system 24, positioned relative to the ISO thread • Handling screw: nut with axial play • Screw shaft can be phosphated on request • Wipers available • Backlash elimination by oversize balls on request (BX designation) • Nut mounting anges available • Screw shaft accessories: FLBU - PLBU & BUF off the shelves. (see pages 40 to 45)

Nominal diameter d0 mm 20 25 25 32 32 40 40 50 63

Right hand lead Ph mm 5 5 10 5 10 5 10 10 10

Maximum length

Basic load ratings dynamic Ca static Coa kN 24,4 37,8 43,7 50,5 55,7 63,2 127,1 189,1 243,5

Number Maximum of circuits axial of balls play

Reduced maximum axial play (on request) mm 0,05 0,05 0,08 0,05 0,08 0,05 0,08 0,08 0,08

Preload torque BX average Tpr Nm 0,10 0,17 0,23 0,25 0,32 0,34 0,64 1,02 1,44

Mass of nut

Mass of screw shaft

Inertia Designation of one metre of screw shaft kgmm2 85 224 255 641 639 1639 1437 3736 9913 SX/BX 20 x 5 R SX/BX 25 x 5 R SX/BX 25 x 10 R SX/BX 32 x 5 R SX/BX 32 x 10 R SX/BX 40 x 5 R SX/BX 40 x 10 R SX/BX 50 x 10 R SX/BX 63 x 10 R

mm 4700 4700 4700 5700 5700 5700 5700 5700 5700

kN 14,5 19,4 25,8 22,1 28,9 24,1 63,6 81,9 91,7

— 4 5 4 5 4 5 5 6 6

mm 0,10 0,10 0,12 0,10 0,12 0,10 0,12 0,12 0,12

kg 0,27 0,49 0,56 0,55 0,79 0,66 1,35 2,10 2,90

kg/m 2,0 3,3 3,2 5,6 5,6 9,0 8,4 13,6 22,0

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