V-Belt Drive.
Calculate belt length, speed ratio, belt linear speed and power capacity for V-belt drives. A/B/C/D/E sections per ISO 4184 / IS 2494. Includes correction factors for arc of contact and length.
Per ISO 4184 / IS 2494 standard sections
mm — pitch diameter of motor/drive pulley
mm — pitch diameter of load pulley
mm — distance between pulley centres
RPM — typical motor: 1440 (4-pole) or 2880 (2-pole)
kW — motor rating
BELT LENGTH (Lp)
—
mm — pitch length
Speed ratio (i)
—
Driven speed (N₂)
—
Belt linear speed
—
Arc of contact (driver)
—
Tight-side tension
—
Slack-side tension
—
Lp = 2C + (π/2)(D₁+D₂) + (D₂−D₁)²/(4C)
v = π·D₁·N₁ / 60000 (m/s)
α = π − 2·sin⁻¹((D₂−D₁)/(2C))
T₁/T₂ = e^(μ·α/sin(β/2)) where β = 38° groove
v = π·D₁·N₁ / 60000 (m/s)
α = π − 2·sin⁻¹((D₂−D₁)/(2C))
T₁/T₂ = e^(μ·α/sin(β/2)) where β = 38° groove
V-belt section reference (IS 2494)
| Section | Top width | Thickness | Min D pulley | Power range (kW) |
|---|---|---|---|---|
| Z | 10 mm | 6 mm | 50 mm | 0.4 – 4 |
| A | 13 mm | 8 mm | 75 mm | 0.75 – 7.5 |
| B | 17 mm | 11 mm | 125 mm | 2 – 25 |
| C | 22 mm | 14 mm | 200 mm | 5 – 75 |
| D | 32 mm | 19 mm | 355 mm | 20 – 250 |
| E | 38 mm | 23 mm | 500 mm | 50 – 500+ |