Input parameters

Input force: F

Outside diameter: D

Inside diameter: D 0 (for disc and cone brakes only)

Width: b

Cone angle: β (for cone brakes only)

Number of brakes (brake surfaces): N

Brake pressure(Max.): p (Max.)

Brake pressure.Speed(Max.): p.v (Max.)

Start speed: n 0

End speed: n 1

Start energy: E, see Energy Calculation chapter

Calculated Parameters

Friction force

for band brakes

F t = F (e fα - 1)

for others

F t = F n f

where:

	α	Length by angle
	f	Friction factor
	F n	Normal force
	for disc brakes:
	F n = F / sin (β)
	for others:
	F n = F

Brake torque calculation

T = 0.5 D e F t

where:

	D e	equivalent diameter
		for cone and disc brakes
		for other D e = D

Pressure calculation

where:

	A = N b L	brake surface
		b	width
		L = 0.5 D s α	length
			α	angle
			D s	mean diameter, for cone and disc brakes D s = 0.5 (D + D 0 )
				for other D s = D

Rough check of warming a brake

p ≤ p (M ax. )

p v ≤ p v (M ax. )

where:

	v = π D n 0 / 60	start circumferential speed

Calculation of braking time

where:

		reduced moment of inertia
		speed/revolutions [rad/s]

Number of revolutions until stop

Output Force F0

for band brakes only:

F 0 = F + F t = F e fα