IAI America RCP2W-RA10C - Manual (Page 54)

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5. Installation
(6) Method to Use Tapped Holes on Back
Applicable model : RA3R, RA4R, RA6R, RA8R
There are tapped holes on the back for attachment. Utilize these holes for installation.
The depth of attachment screw is as shown below:
Model name Tapped hole size Effective thread depth
RA3R M3 10mm
RA4R M6 15mm
RA6R M8 16mm
RA8R M8 16mm
For RCP2-RA4R, RA6R, RA8R 50st equipped with the brake, the motor cover/motor-end cover exceed the
datum surface line. Pay attention to the interference of the motor cover when it is installed.
Datum Surface
RA4R, RA6R, RA8R (50st, with brake)
Sticking out of Datum Surface