28
Table 9C — High-Static Drive Data, 60 Hz — English
Table 9D — Standard Drive Data, 60 Hz — SI
UNIT
40RUA*25
40RUS*25
40RUA*28
40RUS*28
40RUA*30
40RUS*30
MOTOR DRIVE
Motor Pulley Pitch Diameter (in.)
4.3-5.3
4.3-5.3
4.3-5.3
Pulley Factory Setting
Full Turns Open
3.0
3.0
3.0
FAN DRIVE
Pulley Pitch Dia (in.)
7.4
8.6
8.6
Pulley Bore (in.)
1
7
/
16
1
15
/
16
1
15
/
16
Belt No. — Section
2—B
2—B
2—B
Belt Pitch (in.)
36.8
378
37.8
FAN SPEEDS (rpm)
Factory Setting
1118
1024
1024
Range
1014-
1200
†
873-
1075
873-
1075
Max Allowable Speed (rpm)
1200
1100
1100
Change per
1
/
2
Turn of
Moveable Motor Pulley
Flange
19.4
16.7
16.7
MAX FULL TURNS FROM
CLOSED POSITION
6
6
6
SHAFTS CENTER DISTANCE (in.)
8.16-
10.02
6.67-
9.43
6.67-
9.43
†
It is possible to adjust drive so that fan speed exceeds maximum allowable. DO NOT exceed 1200 rpm.
UNIT
40RUA*25
40RUS*25
40RUA*28
40RUS*28
40RUA*30
40RUS*30
MOTOR DRIVE
Motor Pulley Pitch Diameter (mm)
94.0-
119.4
109.2-
134.6
109.2-
134.6
Pulley Factory Setting
Full Turns Open
3.0
3.0
3.0
FAN DRIVE
Pulley Pitch Dia (mm)
239
279
279
Pulley Bore (mm)
36.5
49.2
49.2
Belt No. — Section
2—B
2—B
†
2—B
†
Belt Pitch (mm)
1062
(2) 1987
(2) 1113
(2) 1987
(2) 1113
FAN SPEEDS (r/s)
Factory Setting
12.9
12.5
12.5
Range
11.3-14.4
11.4-14.0
11.2-13.9
Max Allowable Speed (r/s)
20.0
18.3
18.3
Change per
1
/
2
Turn of
Moveable Motor Pulley
Flange
0.255
0.218
0.218
MAX FULL TURNS FROM
CLOSED POSITION
6
6
6
SHAFTS CENTER DISTANCE (mm)
232-279
169-240
169-240
†
Four belts shipped with unit. Use correct set of 2 belts sized according to the pully setting.
