CLCH-SVX07C-EN 107
Start-Up
Determine Fan Speed
WARNING
Rotating Components!
During installation, testing, servicing and troubleshooting of this product it may be necessary to
measure the speed of rotating components. Have a qualified or licensed service individual who
has been properly trained in handling exposed rotating components, perform these tasks.
Failure to follow all safety precautions when exposed to rotating components could result in
death or serious injury.
Fan speed can be determined using a strobe-type tachometer, or revolution counter.
Table 25. Typical sheave diameter and deflection force
Cross
section
Smallest sheave
diameter range
(in.)
Speed (rpm)
range
Belt Deflection Force (lbs)
Super gripbelts and
unnotched gripbands
Gripnotch belts and
notched gripbands
Used belt New belt Used belt New belt
A, AX
3.0–3.6
1,000–2,500 3.7 5.5 4.1 6.4
2,501–4,000 2.8 4.2 3.4 5.0
3.8–4.8
1,000–2,500 4.5 6.8 5.0 7.4
2,501–4,000 3.8 5.7 4.3 6.4
5.0–7.0
1,000–2,500 5.4 8.0 5.7 9.4
2,501–4,000 4.7 7.0 5.1 7.6
B, BX
3.4–4.2
860–2,500 n/a n/a 4.9 7.2
2,501–4,000 n/a n/a 4.2 6.2
4.4–5.6
860–2,500 5.3 7.9 7.1 10.5
2,501–4,000 4.5 6.7 7.1 9.1
5.8–8.6
860–2,500 6.3 9.4 8.5 12.6
2,501–4,000 6.0 8.9 7.3 10.9
C, CX
7.0–9.0
500–1,740 11.5 17.0 14.7 21.8
1,741–3,000 9.4 13.8 11.9 17.5
9.5–16.0
500–1,740 14.1 21.0 15.9 23.5
1,741–3,000 12.5 18.5 14.6 21.6
D
12.0–16.0
200–850 24.9 37.0 n/a n/a
851–1,500 21.2 31.3 n/a n/a
18.0–20.0
200–850 30.4 45.2 n/a n/a
851–1,500 25.6 38.0 n/a n/a
3V, 3VX
2.2–2.4
1,000–2,500 n/a n/a 3.3 4.9
2,501–4,000 n/a n/a 2.9 4.3
2.65–3.65
1,000–2,500 3.6 5.1 4.2 6.2
2,501–4,000 3.0 4.4 3.8 5.6
4.12–6.90
1,000–2,500 4.9 7.3 5.3 7.9
2,501–4,000 4.4 6.6 4.9 7.3
5V, 5VX
4.4–6.7
500–1,749 n/a n/a 10.2 15.2
1,750–3,000 n/a n/a 8.8 13.2
3,001–4,000 n/a n/a 5.6 8.5
7.1–10.9
500–1,749 12.7 18.9 14.8 22.1
1,750–3,000 11.2 16.7 13.7 20.1
11.8–16.0
500–1,749 15.5 23.4 17.1 25.5
1,750–3,000 14.6 21.8 16.8 25.0
8V
12.5–17.0
200–850 33.0 49.3 n/a n/a
851–1,500 26.8 39.9 n/a n/a
18.0–22.4
200–850 39.6 59.2 n/a n/a
851–1,500 35.3 52.7 n/a n/a