Notes:

Dynamic torque shown. Static torque 25% greater.

Based upon an ambient air temperature of 100°F (38°C). Speeds are at friction disc outside diameter.

Coolant to be type C3 approved orEP oils suitable for CC or SE service within a viscosity range of SAE10 to SAE50W with no free chlorine or free sulphur. Thermal capacities based on 100°F (38°C) sump temperature and a maximum temperature rise of 100°F (55°C).

Based on maximum bore.

Absolute cylinder volume with new or worn friction linings.

Weight based on cylinder piston arrangements made from either Aluminum or Steel.

Modified Standards Available

 Suggested Service Factor Table

 SF

*  Data shown is subject to change. 
Please consult factory for current 
dimensional data. 

Selection Procedures

I Calculate the torque requirement for the ap-
plication using one of the following formula

Torque (Lb./In.) = HP* 63025/RPM
or
Tc (Nm.) = HP* 9550/RPM

II Identify the service factor which best identifies
your application from the suggested service
factor table.

III Adjust the torque requirement using the
selected service factor.

Gross Torque Capacity (T) / Safety Factor (SF)

T= Tc x SF or T=Tb x SF

IV. Determine if the model will:
1) Accommodate the shaft and key
2) Operate at the required speed
3) Fit within the available space

V. Determine the Drive Ring Mounting

Vl. Complete the Application Fact Sheet
provided in this brochure or complete online
at www.loganclutch.com. Call, e-mail, or
Fax your application and place your order.

HP = Horsepower
RPM = Clutch or Brake shaft speed
WR2 = Total inertia to be stopped (Ib.ft.2)
T = Required Torque (Lb./ Ft., Nm, Lb./in)
Tc = Clutch Torque (Lb./ Ft., Nm, Lb./in)
Tb = Brake Torque (Lb./ Ft., Nm, Lb./in)
t = Time to stop (seconds)
SF = Service Factor

Torque & Horsepower Formulas

HP = T(Lb./Ft.)*RPM /5250
Torque (Lb./Ft.) = HP*5250/RPM

HP = T(Lb./Ft.)* RPM / 63025
Torque (Lb./In.) = HP * 63025 / RPM

HP = T(Nm..) x RPM /9950
Torque (Nm.) = HP*9950/RPM

Torque Conversion Calculators
Newton meters (Nm.) to Pound inches (lb.ft.in.)
Pound inches (lb.ft.in.) to Newton meters (Nm.)
Newton meters (Nm.) to Pounds feet (lb. ft.)
Pounds feet (lb.ft.) to Newton meters (Nm)

Horsepower Conversion Calculators
Horsepower (HP) to kW (Kilowatt)
Kilowatt (kW) to Horsepower (HP)

Pressure Conversion Calculators
Bar to pounds per square inch (psi)
Pounds per square inch (psi) to Bar

Measurement Conversion Table
Millimeters (mm) to Inches (in)
Inches (in) to Millimeters (mm)

Weight Conversion Table
Pounds (lbs.) to Kilograms (Kg.)
Kilograms (Kg.) to Pounds (lbs.)

Multiplier
8.851
0.113
0.738
1.356

Multiplier
.7457
1.341

Multiplier
14.5
0.068

Multiplier
.03937
25.4

Multiplier
0.453
2.205