5
Material Gauges
Shaft
Size
Max
Motor
Frame
Size
Approx.
Weight
(lbs.)
Models
Fan
Size
Fan
Panel
Drive
Frame
Propeller
Hub Blade
L H L H
Level 1 Model SB-1H
20 18 14 14 16 18 3/4 56 60
24 18 14 14 16 18 3/4 56 70
30 18 12 14 12 16 3/4 56 95
36 18 12 14 12 16 3/4 145T 110
42 16 12 12 10 14 1 145T 150
48 16 12 12 10 14 1 145T 175
54 14 12 12 10 14 1 145T 205
Level 2 Model SB-2L
20 18 14 14 16 18 3/4 143T 65
24 18 14 14 16 18 3/4 145T 75
30 18 12 14 12 16 1 184T 100
36 18 12 14 12 16 1 184T 115
42 16 12 12 10 14 1
1
⁄4 184T 160
48 16 12 12 10 14 1
1
⁄4 184T 260
54 16 12 12 10 14 1
1
⁄4 184T 315
60 14 12 10 12 1
1
⁄2 215T 370
Level 3 and Reversible Model SB-3L Model SBCR
24 18 14 12 *16 3/4 145T 90
30 16 12 12 *16 1 184T 140
36 16 12 12 *16 1
1
⁄4 184T 260
42 14 12 10 *14 1
1
⁄2 215T 320
48 14 12 10 *14 1
1
⁄2 215T 420
54 14 10 10 *14 1
1
⁄2 254T 590
60 14 10 3/16 in. *12 1
3
⁄4 256T 755
72 12 10 3/16 in. *12 2 256T 1050
Note: Approximate weight does not include accessories.
* SBCR uses cast aluminum propeller. Propeller blade gauge column does not apply.
Level 1 Level 2 Level 3 and Reversible
Model Sizes
20 - 54 20 - 60 24 - 36 42 - 72
Panel/Drive
Frame
Galvanized steel with one-piece drawn venturi, bolted structural steel
channels and one-piece motor/bearing plate
Galvanized steel with one-piece drawn venturi,
bolted structural steel channels and two piece
motor/bearing plate
(paint optional) (all-welded panel/drive frame optional, paint optional)
Propeller
Galvanized steel, riveted
blades (aluminum optional)
Reinforced
galvanized steel,
riveted blades,
keyed hub
(excluding the 2L)
SB - Heavy duty,
welded, reinforced,
powder-coated steel
blades. All with keyed
hubs.
SB - Heavy duty, welded, reinforced, powder-
coated steel blades. All with keyed hubs.
SBC - Heavy duty, cast aluminum blades. All
with keyed hubs.
Bearings
Stamped steel pillow blocks
up to size 36 and cast pillow
blocks for size 42 and larger
Cast iron pillow blocks with grease fittings
Belt Drive
Construction and Material Data