Logan CH Clutches and Brakes

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

I. Hydraulic Actuation Wet or Dry Operation

Schematic # 1: Displays a typical circuit diagram for a hydraulically actu-
ated wet or dry-running disc clutch. The pump (C) draws the oil through
the filter (D) from the reservoir (H) and passes it under pressure to the
operating pipeline. The operating pressure is adjusted by the limiting valve
(E). Any excess oil flows back to the reservoir. The clutch (A) is operated
when the “ON” position of the control valve (B) is selected.

A. Clutch
B. 3/2 Control Valve
C. Fixed Displacement Pump
D. Filter
E. Pressure Limiting Valve
F. Rotary Connection
G. Non-Return Valve
H. Oil Reservoir

II. Pneumatic / Air Actuation Dry Operation

III. Hydraulic Actuation Wet operation with through shaft oil lubrication

Schematic # 3: Displays a typical circuit diagram for a hydrauli-
cally actuated clutch with through shaft lubrication directed at
the disc pack. During engagement, the excess oil flows through
a cross drilled port through the shaft of the clutch. The throttle
valve (E2) acts as the regulator of coolant flow.

A. Clutch
B. 3/2 Control Valve
C. Fixed Displacement Pump
D. Filter
E1. and E2. Throttle Valve
F. Pressure Limiting Valve
G. Non-Return Valve
H. Accumulator
I. Oil Reservoir

IV. Hydraulic Actuation Wet operation with intensive through shaft oil lubrication

Z-Drive Type Applications for Main Propulsion

Ports worldwide are requiring Tugs and Escort Vessels to handle larger ships within smaller, less maneuverable areas.

Logan CH Series clutches are ideal for stern drive tugs and work boats that require high torque transmission from a multiple disc wet or dry clutch - within a small envelope.

Dependability, reliability, ease of operation and maintenance are what make the Logan CH Series clutch an ideal choice

CH Clutches for Draw Works on Marine Oil Drilling Platforms

Logan CH clutches are used in single and multi-speed transmissions, gear boxes, and draw works for maximum torque transfer.

CH1640 CH 1440

 Marine Towing and Mooring Winches

Logan CH Series clutches provide a wide range of power options. From main propulsion drive systems in workboats, tugs and cargo ships to ferries and transport vessels.