Instruction Manual

Chapter 2 Installation 2.3 How to Install
81
(2) Mounting Method 2 (Installation using flange surface)
• Direct Installation
Actuator
Type
A B
Tightening Torque
[N•m]
RA4C 34 M6, depth 12 5.4
RA6C 50 M8, depth 16 11.5
Regarding attachment screws
• Use of high-tension bolts meeting at least ISO-10.9 is recommended.
• Make sure to have the length of at least 1.8 times to the bolt diameter for the effective length of
screw engagement for the tightening of a bolt and a female screw.
Caution: Pay attention when selecting screws. If a bolt out of the instruction is used, it may
cause damage on tapped holes or unexpected accident or failure due to insufficient
strength on the actuator attachment.
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