ABB IRB 920 Product Manual page 516

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5.6.5 Replacing the ball screw

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Refit the mechanical stopper to the ball screw at

30.5 mm position to the lower of the ball screw.

For robots with protection class IP54 (option 3350-

For robots with protection type Clean Room (op-

tion 3351-1)

For 180 mm ball screw, refit the mechanical

stopper to the ball screw at 65.8 mm position to

the lower of the ball screw.

For 300 mm ball screw, refit the mechanical

stopper to the ball screw at 80.8 mm position to

the lower of the ball screw.

Make sure that the limit block opening gap is

aligned with the ball screw origin point.

If the ball screw nut or ball screw spline nut go

out of the screw shaft, the ball screw is destroyed.

Be careful when you do any work that may cause

Be careful with the orientation of the mechanical

The flat side is on the upper side.

xx1800002861

For robots with protection class

IP30 (option 3350-300)

xx1900000144

For robots with protection class

IP54 (option 3350-540)

For robots with protection type

Clean Room (option 3351-1)

For 180 mm ball screw

xx2100002425

For 300 mm ball screw

Product manual - IRB 920

3HAC075721-001 Revision: C

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