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