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
11⁄4
184T
160
48
16
12
12 10
14
11⁄4
184T
260
54
16
12
12 10
14
11⁄4
184T
315
60
14
12
10
12
11⁄2
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
11⁄4
184T
260
42
14
12
10
*14
11⁄2
215T
320
48
14
12
10
*14
11⁄2
215T
420
54
14
10
10
*14
11⁄2
254T
590
60
14
10
3/16 in.
*12
13⁄4
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
