Table of Contents
Advertisement
Table 16. Typical sheave diameter and deflection force
Smallest sheave
Cross section
diameter range (in.) Speed (rpm) range
3.0–3.6
A, AX
3.8–4.8
5.0–7.0
3.4–4.2
B, BX
4.4–5.6
5.8–8.6
7.0–9.0
C, CX
9.5–16.0
12.0–16.0
D
18.0–20.0
2.2–2.4
3V, 3VX
2.65–3.65
4.12–6.90
4.4–6.7
5V, 5VX
7.1–10.9
11.8–16.0
12.5–17.0
8V
18.0–22.4
Determine Fan Speed
WARNING
Live Electrical Components!
Failure to follow all safety precautions when exposed to
rotating components could result in death or serious
injury. During installation, testing, servicing and
troubleshooting of this product, it may be necessary to
measure the speed of rotating components. Have a
qualified licensed service individual who has been
properly trained in handling exposed rotating
components perform these tasks.
Fan speed can be determined using a strobe-type tachometer,
or revolution counter.
CLCH-SVX009L-EN
Super gripbelts and unnotched gripbands Gripnotch belts and notched gripbands
Used belt
1,000–2,500
3.7
2,501–4,000
2.8
1,000–2,500
4.5
2,501–4,000
3.8
1,000–2,500
5.4
2,501–4,000
4.7
860–2,500
n/a
2,501–4,000
n/a
860–2,500
5.3
2,501–4,000
4.5
860–2,500
6.3
2,501–4,000
6.0
500–1,740
11.5
1,741–3,000
9.4
500–1,740
14.1
1,741–3,000
12.5
200–850
24.9
851–1,500
21.2
200–850
30.4
851–1,500
25.6
1,000–2,500
n/a
2,501–4,000
n/a
1,000–2,500
3.6
2,501–4,000
3.0
1,000–2,500
4.9
2,501–4,000
4.4
500–1,749
n/a
1,750–3,000
n/a
3,001–4,000
n/a
500–1,749
12.7
1,750–3,000
11.2
500–1,749
15.5
1,750–3,000
14.6
200–850
33.0
851–1,500
26.8
200–850
39.6
851–1,500
35.3
Belt Deflection Force (lbs)
New belt
5.5
4.2
6.8
5.7
8.0
7.0
n/a
n/a
7.9
6.7
9.4
8.9
17.0
13.8
21.0
18.5
37.0
31.3
45.2
38.0
n/a
n/a
5.1
4.4
7.3
6.6
n/a
n/a
n/a
18.9
16.7
23.4
21.8
49.3
39.9
59.2
52.7
Check unit vibration if the fan speed is changed more than
five percent from the original designed speed, or if parts such
as shafts, fan wheels, bearings, or other drive components are
replaced. Do not exceed the maximum fan speed.
Pay particular attention to any vibration, noise, or overheating
of the motor and fan bearings; however, note that bearings
may run warm during break in.
Start-Up
Used belt
New belt
4.1
6.4
3.4
5.0
5.0
7.4
4.3
6.4
5.7
9.4
5.1
7.6
4.9
7.2
4.2
6.2
7.1
10.5
7.1
9.1
8.5
12.6
7.3
10.9
14.7
21.8
11.9
17.5
15.9
23.5
14.6
21.6
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
3.3
4.9
2.9
4.3
4.2
6.2
3.8
5.6
5.3
7.9
4.9
7.3
10.2
15.2
8.8
13.2
5.6
8.5
14.8
22.1
13.7
20.1
17.1
25.5
16.8
25.0
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
63
Advertisement
Table of Contents
