CAMCORP HVP with Roots Blower - Manual (Page 59)

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Figure 2 - Allowable Overhung Loads for V-Belt Drives Universal RAI ® /URAI ® -J Units
A 1/4" Max
Belt Pull lbs =
252100 • Motor HP
Blower RPM • Sheave Diameter
Frame Dimension Max Allowable Min Sheave
Size “A” Shaft Load (lb-in.) Diameter
22, 24 0.61 150 4.00
32, 33, 36 0.80 400 5.00
42, 45, 47 1.02 650 5.00
53, 56, 59 1.13 1,325 6.00
65, 68, 615 1.36 2,250 8.00
76, 711, 718 1.16 2,300 9.50
NOTE:
Arc of sheave belt contact on the smaller sheave not to be less than 170°
Driver to be installed on the inlet side for vertical units, and on the drive shaft side for hori-
zontal units.
ROOTS recommends the use of two or more 3V, 5V or 8V belts and sheaves.
Shaft Load (lb.in) = Belt Pull • (A + 1/4” + )
Sheave Width
2
Motor On Inlet Side of Blower (Top Shaft)
Motor On Inlet Side of Blower (Bottom Shaft)
Motor On Discharge Side of Blower (Top Shaft)
Motor On Discharge Side of Blower (Bottom Shaft)
INLET DISCHARGE
Top Shaft
INLET DISCHARGE
Bottom Shaft
Motor On Drive Shaft
Side of Blower
INLET
DISCHARGE
Driven Shaft Drive Shaft
INLET DISCHARGE
Top Shaft
INLET DISCHARGE
Bottom Shaft
Motor On Driven Shaft
Side of Blower
INLET
DISCHARGE
Drive Shaft Driven Shaft
Acceptable Blower Drive Arrangement Options
ACCEPTABLE UNACCEPTABLE