(15) 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
RV-2FR series
J1
210-3GT-6
J2
324-3GT-6
J3
303-3GT-6
J4
186-3GT-4
J5
336-3GT-4
J5 (brake)
174-3GT-4
J6
345-3GT-4
J6 (brake)
174-3GT-4
RV-2FRL series
J1
210-3GT-6
J2
324-3GT-6
J3
324-3GT-6
J4
186-3GT-4
J5
336-3GT-4
J5 (brake)
174-3GT-4
J6
345-3GT-4
J6 (brake)
174-3GT-4
RV-4FR series
J1
315-EV3GT-12
J3
369-EV3GT-6
Note2)
240-EV3GT-6
J4
J5
393-EV3GT-4
J6
270-EV3GT-4
RV-7FR series
J1
405-EV5GT-20
J3
501-3GT-9
J4
237-EV3GT-6
J5
408-EV3GT-6
J6
270-EV3GT-4
RV-7FRLL
J4
252-EV3GT-9
J5
408-EV3GT-6
J6
270-EV3GT-4
RV-13FR/13FRL, RV-20FR series
J4
252-EV3GT-9
J5
495-EV3GT-9
J6
330-EV3GT-6
Note1)The tension of the brake timing belt is automatically adjusted by work of spring installed on the motor plate.
Note2)RV-4FRJL (5-axis type robot) has no J4 axis.
Preset value
M(g/m)
W(mm/R)
2.5
6
2.5
6
2.5
6
2.5
4
2.5
4
2.5
4
2.5
4
2.5
4
2.5
6
2.5
6
2.5
6
2.5
4
2.5
4
2.5
4
2.5
4
2.5
4
2.5
12
2.5
6
2.5
6
2.5
4
2.5
4
4.0
20
2.5
9
2.5
6
2.5
6
2.5
4
2.5
9
2.5
6
2.5
4
2.5
9
2.5
9
2.5
6
5 Maintenance and Inspection
Tension for new belt
installation (N)
S(mm)
61
26 to 32
88
26 to 32
103
26 to 32
52
18 to 22
131
18 to 22
Note1)
42
-
131
18 to 22
42
Note1)
-
61
26 to 32
88
26 to 32
106
26 to 32
52
18 to 22
131
18 to 22
42
Note1)
-
131
18 to 22
42
Note1)
-
85.5
79.7 to 97.4
118.4
39.2 to 47.9
39.2 to 47.9
56.4
149.8
27.0 to 33.0
96.0
27.0 to 33.0
107.5
96 to 118
178.5
59.4 to 72.6
54.9
39.2 to 47.9
150.0
39.2 to 47.9
96.0
27.0 to 33.0
60.0
59.4 to 72.6
150.0
39.2 to 47.9
96.0
27.0 to 33.0
60.0
59.4 to 72.6
181.0
59.4 to 72.6
111.0
39.2 to 47.9
Maintenance and inspection procedures 5-135
Replacement
guideline tension (N)
15
15
15
10
10
10
10
10
15
15
15
10
10
10
10
10
30
15
15
10
10
70
22
15
15
10
22
15
10
22
22
15
