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The YMPG Series Planetary reducers have been designed to cover a wide variety of applications in many fields. After many successful applications for many years in the Heavy Industrial
Field, they are now available in a complete range from 1500 Nm to 500,000 Nm and in a variety of version to fit almost every possible application in the Mobile, Farming, Marine and mining field.

This series has been designed by some of the most Experienced European engineers in the Planetary field with in mind the most efficient and smallest size for any given torque outputs. Most of our planetary have four (4) planets and the gear designed to withstand the most rigorous applications, The “Modular System” permits the combination of all sub-assemblies to meet the exact requirements by any application.

Manufactured in one of the most modern facilities under the constant supervision of quality minded expert and tested to meet the strictest controls, we are confident to meet or exceed any standard required by today ever demanding customers.

YMPG - IN-LINE MALE SPLINE OUTPUT
YMPG-A - ANGLE DRIVE MALE SPLINE OUTPUT
YMPG-F - IN-LINE FEMALE SPLINE OUTPUT
YMPG-FA - ANGLE DRIVE FEMALE SPLINE OUTPUT
YMPG-SD - IN-LINE SHRINK DISC OUTPUT
YMPG-SDA - ANGLE DRIVE SHRINK DISC OUTPUT
YMPG-SCI - SPECIAL INTERCHANGEABLE
YMPG-FM - IN-LINE FOOT MOUNTED SPLINE OUTPUT
YMPG-FMA - ANGLE DRIVE FOOT MOUNTED SPLINE OUTP
YMPG-FMSD - IN-LINE SHRINK DISC SHAFT MOUNTED
YMPG-FMSDA - ANGLE DRIVE SHRINK DISC SHAFT MOUNT

Introduction
Production Program


For the correct selection of a Young Powertech Inc Planetary reducer is necessary to take into consideration a number of factors. The correct use of the information in this catalogue will help the customer to choose the best possible unit.

MOTOR-input power
The motor or device that will transmit the rotating motion to the speed reducer and the torque is a determinant factor in the life of the reducer especially if this cannot be closely controlled. Please consult our technical department REDUCTION To achieve the correct output speed or torque, a proper reduction related to the motor speed and torque and the application speed is necessary.

MAXIMUM INPUT SPEED RPM
This is the maximum INTERMITTENT speed the unit can be run at without damaging gears and other components. For continuous duty or speed higher than those permitted, please contact Young Powertech Inc.

EFFICIENCY
The efficiency of a planetary reducer is very high. The average efficiency if 98% per stage. Only when in very high speed or with the use of bevel gear the efficiency drops a little.

CONTINUOUS TORQUE Mc
This is the highest torque according to ISO standard 6336. This value corresponds to and “Unlimited” gear life taking into consideration the bending and surface stresses of the teeth. When selecting the reducer, this value is found in each reducer pages and rated depending on the input speed. For different life at different condition, please refer to diagram on page page 9 Table 3

MAXIMUM TORQUE Mmax
This is the maximum torque the reducer can transmit for a limited period of time without causing damages to internal components. This value MUST be considered as the MAXIMUM output torque during starting, reversing or working time. It cannot be considered as CONTINUOUS working torque. This value must also be carefully evaluated in application with starts, stops and reversing actions

Technical Data

THERMAL RATING HP/KW

This is the maximum power the reducer can transmit continuously without damages to the components in normal operating condition and ambient temperature without external cooling system. In this condition oil temperature should not exceed 90 degrees without external cooling. These conditions are: Input speed 1500 RPM; Ambient temperature 20C; Oil ISO VG 150; mounting position Horizontal; free air flow around unit. If the application required power is higher than the reducer Thermal Rating an external cooling system must be installed. If ambient temperature, input speed and torque output varies from the standard, a “CORRECTION” factor must be used to calculate the proper cooling requirements. Please see table 4 page 10.

OPERATING TEMPERATURE
Normal operating temperature should be between -20 to +90. Other working temperature is possible with special lubricants and seals. Please refer to Young Powertech Inc Engineering deptm. for approval.

PLEASE NOTE: The Thermal capacity of the reducer must be related to the actual requirement of the application and not the power of the motor installed which could be greater than the power required by the application.

SERVICE FACTOR
The “SF” is a coefficient used with the formula for the selection of the correct unit. The formula takes into account load conditions.

LIFE CALCULATION
Life calculation is based on cycles and on the working conditions of the reducer. With the diagram Table 3, Page 9 an almost exact life calculation is possible.

VARIABLE TORQUE AND SERVICE FACTOR “FS”
To calculate the gear life of the reducer, the “FS” factor is important. This relate to the number of starts, stops and reversal within a period of time. The following data will apply to the reducer torque output reducing it to bring the life rating in line with requirements

To insure proper reducer selection for a given application a number of factors need to be taken into consideration.

The Torque rating T ISO has been calculated using the ISO DP 6336. This “torque” is based on an “unlimited” life (cycles) of the weakest part of the reducer.T. cont. is the “transmitted torque” on a continuous basis that guaranty a life of “hours” at a given output speed RPM n2, This is given in each individual reducer and ratio based on 5000 hours at different input speed. Other life calculation can be achieved by using the “Life Calculation Diagram Table 3 Page 9”.

FACTORS TO BE CONSIDERED
1 - Input Speed
2 - Input Torque
3 - Type of input
4 - Input HP
5 - Ratio
6 - Service factor
7 - Safety factor based on F.E.M. requirement
8 - Thermal capacity
9 - Ambient temperature
10 - Number of start - stop - reversal

With the above data, it will be easy to choose the best possible reducer configuration. Young Powertech Inc engineers would be happy to select the proper unit. Please fill in the “Application data sheet” in the catalogue or on-line for a quick response. To choose the proper output selection to meet application requirement, please use the following factors.
1 - Output torque
2 - Radial load
3 - Distance from mounting flange to center of load
4 - Diameter of Pinion, sprocket,
5 - Output speed RPM
6 - Life required Number of cycles expected

Reducers Selection
Output Selection


In any mechanical transmission, the selection of the correct planetary reducer is of the outmost importance. Every component is subjected to variable stresses, load, speed and working cycles and the following information is necessary for such selection.
input Mover
1. Tipe of the prime mover. Hydraulics, electric, mechanical etc.
2. Power of prime mover
3. Speed of the input mover
4. Torque input

Driven equipment
1. Power required by the equipment
2. Speed required
3. Type of operation
4. Working cicle


White the above information, the following data will become available
1. Reduction ratio required
2. Actual working torque and speed
3. Actual loads on input and output shafts

Now we have to check if the reducerr chosen can accept the required loads and speed
1. Input and output speed
2. Actual working torque
3. Loads on input and output shafts
4. Horsepower to be transmitted
5. Ambient temperature

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