5-125
Maintenance and inspection procedures
(12) Timing belt tension
The following table shows the preset values of the sonic belt tension gauge, the tension value for new belt
installation, and the tension value as the replacement guideline.
Table 5-8 : Belt tension
Axis
Belt type
Preset value
Tension for new belt
installation (N)
Replacement guideline
tension (N)
M(g/m)
W(mm/R)
S(mm)
RH-3FRH series
J3
309-EV3GT-6
2.5
6
96
39 to 48
15
J4 (motor side)
336-EV3GT-6
2.5
6
64
39 to 48
15
J4 (shaft side)
282-EV3GT-12
2.5
12
74
80 to 97
30
RH-6FRH series
J3
264-EV3GT-9
2.5
9
82
59 to 79
22
J4 (motor side)
315-EV3GT-6
2.5
6
64
39 to 48
15
J4 (shaft side)
363-EV3GT-12
2.5
12
95
80 to 97
30
RH-12FRH series
J3
288-EV3GT-12
2.5
12
71
83 to 101
30
J4 (motor side)
417-EV3GT-9
2.5
9
99
60 to 73
22
J4 (shaft side)
456-EV3GT-20
2.5
20
121
138 to 151
49
RH-20FRH series
J3
303-EV3GT-12
2.5
12
71
83 to 101
30
J4 (motor side)
417-EV3GT-9
2.5
9
99
60 to 73
22
J4 (shaft side)
456-EV3GT-20
2.5
20
121
138 to 151
49
RH-3FRHR series
J1
340-5GT-20
4.0
20
84
171 to 209
69
J2
363-3GT-12
2.5
12
103
80 to 97
30
J3
297-3GT-9
2.5
9.0
77
59 to 73
22
J4 (motor side)
345-3GT-6
2.5
6.0
69
39 to 48
15
J4 (shaft side)
312-3GT-12
2.5
12
82
80 to 97
30