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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
19.416.716.7
MAX FULL TURNS FROM
CLOSED POSITION
666
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) 36.549.249.2
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 12.912.512.5
Range 11.3-14.4 11.4-14.0 11.2-13.9
Max Allowable Speed (r/s) 20.018.318.3
Change per
1
/
2
Turn of
Moveable Motor Pulley
Flange
0.255 0.218 0.218
MAX FULL TURNS FROM
CLOSED POSITION
666
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.