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15.2 Tightening torques
− All the tightening torques are intended in Nm.
− Tightening torque tolerance: ±10%.
− The tightening torques are based on a friction coefficient of 0.12 with a lubricated fixing elements (bolts or nuts) threads.
− After long operating times or use at temperatures above 80°C, the breakaway torque may be significantly higher.
Table 15-1: End cap screws (13)
ACTUATOR MODEL
THREAD
AT045U
M5
AT051U
AT101U
AT201U
M6
AT251U
AT301U
M8
AT351U
AT401U
M10
AT451U
AT501U
M12
AT551U
AT601U
M14
AT651U
M16
AT701U
M14
AT751U
M16
AT801U
Table 15-3: Stop screws nuts (04)
ACTUATOR MODEL
THREAD
AT051U
M6
AT101U
AT201U
M8
AT251U
AT301U
M10
AT351U
M12
AT401U
AT451U
M14
AT501U
AT551U
M16
AT601U
M20
AT651U
AT701U
M24
AT751U
M30
AT801U
EB 8325 EN
TIGHTENING TORQUE (Nm)
4 ÷ 5
7 ÷ 8
18 ÷ 20
34 ÷ 36
60 ÷ 64
96 ÷ 102
150 ÷ 160
96 ÷ 102
150 ÷ 160
TIGHTENING TORQUE (Nm)
8 ÷ 9
18 ÷ 20
34 ÷ 36
60 ÷ 64
96 ÷ 102
150 ÷ 160
290 ÷ 310
235 ÷ 250
470 ÷ 500
Table 15-2: Extra travel stop adjustment nuts (04R)
ACTUATOR MODEL
THREAD
AT051U
M6
AT101U
AT201U
M8
AT251U
AT301U
M10
AT351U
M12
AT401U
AT451U
M14
AT501U
AT551U
M16
AT601U
M20
AT651U
AT701U
M24
AT751U
M30
AT801U
Table 15-4: Pressure connection
ACTUATOR MODEL
THREAD
AT045U
AT051U
AT101U
AT201U
AT251U
AT301U
M5
AT351U
AT401U
AT451U
AT501U
AT551U
AT601U
AT651U
AT701U
M6
AT751U
AT801U
Annex
TIGHTENING TORQUE (Nm)
8 ÷ 9
18 ÷ 20
34 ÷ 36
60 ÷ 64
96 ÷ 102
80 ÷ 86
160 ÷ 170
270 ÷ 290
540 ÷ 570
TIGHTENING TORQUE (Nm)
4 ÷ 5
8 ÷ 9
15-3
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