NISSEI CORPORATION

Actuator

Notes & Disclaimers
For Beginners
Click here if you want
to know
the selection process
  • Step 1
    Select the Series of High
    Precision Reducer for Servo
    Motor from Product Line Up
  • Step 2
    Select the
    Backlash
  • Step 3
    Select the Linkage Method
    (High Precision Reducer for
    Servo Motor and Device)
  • Step 4
    Enter User Values
  • Step 5
    Enter Driving
    Pattern and Condition
Step1　Select the Series of High Precision Reducer for Servo Motor from product line up

Please select the Series of High Precision Reducer for Servo Motor

Click here for the differences in each series
For Beginners
Click here if you want
to know
the selection process
  • Step 1
    Select the Series of High
    Precision Reducer for Servo
    Motor from Product Line Up
  • Step 2
    Select the
    Backlash
  • Step 3
    Select the Linkage Method
    (High Precision Reducer for
    Servo Motor and Device)
  • Step 4
    Enter User Values
  • Step 5
    Enter Driving
    Pattern and Condition
Step2　Select the Backlash

Select the Backlash of output shaft

If you want to go back to the previous page, click the “Back” button at the bottom left.

<Reference>
Output shaft 1 round(360 deg.)/360=1 deg.
1 deg./60=1 arcmin, 1 deg./20=3 arcmin, 1 deg./4=15 arcmin, 1 deg./2=30 arcmin
* Low Backlash (30 to 60 arcmin) accuracy would be deferent by reduction ratio

For Beginners
Click here if you want
to know
the selection process
  • Step 1
    Select the Series of High
    Precision Reducer for Servo
    Motor from Product Line Up
  • Step 2
    Select the
    Backlash
  • Step 3
    Select the Linkage Method
    (High Precision Reducer for
    Servo Motor and Device)
  • Step 4
    Enter User Values
  • Step 5
    Enter Driving
    Pattern and Condition
Step3　Select the Linkage Method (High Precision Reducer for Servo Motor and Device)

Select Linkage Method (High Precision Reducer for Servo Motor and Device)

If you want to go back to the previous page, click the “Back” button at the bottom left.

For Beginners
Click here if you want
to know
the selection process
  • Step 1
    Select the Series of High
    Precision Reducer for Servo
    Motor from Product Line Up
  • Step 2
    Select the
    Backlash
  • Step 3
    Select the Linkage Method
    (High Precision Reducer for
    Servo Motor and Device)
  • Step 4
    Enter User Values
  • Step 5
    Enter Driving
    Pattern and Condition
※Sample Image
Step4　Enter User Values

If you want to go back to the previous page, click the “Back” button at the bottom left.

Moving Speed　V =
Weight of the Work　M1 = kg
Weight of the Table
(Total Weight
Excluding
Work and Screw)
M2 =
 kg
Weight of the
Screw Shaft
M3 =
 kg
Screw Lead　L = mm
Transmission
Efficiency of Screw
η1 =
Transmission Efficiency of
Screw
Reference example of screw transmission efficiency in actuator.
The transmission efficiency of the screw varies depending on using conditions and screw specifications.
For details, please contact the screw manufacturer.
Mechanism Example of Transmission Efficiency
Actuator (Ball Screw) 0.9
Actuator (Trapezoidal Screw) 0.2-0.3
Outer Diameter
of Screw Shaft
D1 =
 mm
Pitch Circle Diameter
of the Rolling
Element Bearing
D2 =
 mm
P.C.D. of Driven
Side Sprocket
(Timing Pulley, Gear)
D3 =
 mm
P.C.D. of Drive
Side Sprocket
(Timing Pulley, Gear)
D4 =
 mm
Friction Coefficient
of the Guide
μ1 =
Examples of Coefficient of Friction
List of examples of coefficient of friction are shown below.
Coefficient of friction differs depending on using condition such as material and form of connecting parts.
Values shown below do not guarantee the using conditions of customers.
Mechanism Examples of Coefficient of Friction
Chain (Belt) screw Guide 0.2~0.3
Turntable Bearing 0.05~0.1
Rack and Pinion Guide 0.05~0.1
Cart Rolling Friction 0.2~0.3
Lifter (Elevator) Bearing 0.05~0.1
Actuator Guide 0.05~0.1
Bearing 0.05~0.1
Turnover Machine Bearing 0.05~0.1
Rotating Machine (Cylindrical Object) Bearing 0.05~0.1
Hoisting Machine Bearing 0.05~0.1
Roller screw Rolling Friction 0.2~0.3
Bearing 0.05~0.1
Friction Coefficient
of Screw
Shaft Bearing
μ2 =
Screw Shaft
Inclination Angle
θ =
 °
Rated Rotational
Speed of
Servo Motor
N1 =
r/min
Service Factor　Sf =
※Select the coefficient
Service Factor（Sf）
Gearmotors and reducers are designed to run for 10 hours a day under moderate shock loads.When used under conditions that exceed those, load torque should be revised according to the service factors in the table below.
Load Conditions Service Factor(Sf) Example of Use
Run for 3 hours
or less per day		 Run for 3-10
hours per day		 Run for over 10
hours per day
Uniform Loads 1 1 1 screws (uniform loads),
Screens, Mixing machines (alow viscosity),
Water treatment machines (light loads),
Machine tools (feed shafts), Elevators,
Extruding machines, and Distilling machines
Moderate Shock Loads 1 1 1.25 screws (non-uniform loads or heavy loads),
Mixing machines (high viscosity), Vehicular machinery,
Water treatment machines (medium loads),
Hoists (light loads), Papermaking machines,
Feeders, Food machinery, Pumps,
Sugar refining machinery, and Textile machines
Heavy Shock Loads 1 1.25 1.5 Hoists (heavy loads), Hammer mills,
Metalworking machinery, Crushers, and Tumblers
Correction Coefficient
of Moment of Inertia by
Operating Conditions
C=
Correction Coefficient of Inertia Moment according to the operating conditions (C)
Choose the Correction Coefficient of Inertia Moment according to the operating conditions.
Linkage Method Start-Up Frequency Correction Coefficient
Direct Connection
(no slack)		 Up to 70 times per day 1
More than 70 times per day 1.5
By Chain
(with slack)		 Up to 70 times per day 2
More than 70 times per day 3
※ IPM gearmotors are not eligible. (C=1)
Coefficient according
to Linkage Method
K1 =
Coefficient according to Linkage Method（K1）
Choose the Coefficient (K1) according to the linkage method.
Linkage Method K1
Chain / Timing Belt 1.00
Gears 1.25
V-Belt 1.50
Coefficient according to Load Position（K2）
Choose the coefficient (K2) according to the load position.
Load Position K2
Base of the Shaft 0.75
Middle of the Shaft 1.00
End of the Shaft 1.50
※In case of hollow shaft, coefficient (K２) is 1.00.
Coefficient according
to Load Position
K2 =
Output Shaft Direction
Choose the Coefficient（K1）according to the linkage method.
Linkage method K1
Chain / Timing Belt 1.00
Gear 1.25
V-Belt 1.50
Coefficient according to Load Position（K2）
Choose the Coefficient（K2）according to the linkage method.
Load Position K2
Base of the Shaft 0.75
Middle of the Shaft 1.00
End of the Shaft 1.50
※In case of hollow shaft, coefficient (K２) is 1.00.
Coefficient according
to Linkage Method
fb =
Coefficient according to Linkage Method（fb）
Choose the Coefficient (fb) according to the linkage method.
Linkage method fb
Timing Belt 1.2
Gear / Chain 1.3
V-Belt 2
Flat Belt (with tension pulley) 3
Flat Belt 4
Coefficient according to Load Level（fw）
Choose the Coefficient (fw) according to the load level.
Load Level fw
No Impact, Smooth Operation 1.2
Normal Operation 1.3
Operation With Vibration / Impact Load 2
O.H.L. Load Position

Please set Load position
Coefficient according
to Load Level
fw =
O.H.L. Load Position =
For Beginners
Click here if you want
to know
the selection process
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Before using the High Precision Reducer for Servo Motor
Calculation Selection Tool.
Please read carefully before using the High Precision Reducer for Servo Motor Calculation Selection Tool.

When using the High Precision Reducer for Servo Motor Calculation Selection Tool (hereafter referred to as "this Calculation Selection Tool") provided on the website by Nissei Corporation(hereafter referred to as "we"), please be sure to read the notes and disclaimers below and use it only if you agree to all the terms. If you disagree, you may not be able to use this Calculation Selection Tool.

Notes & Disclaimers

  1. The calculation results from this calculation selection tool are all reference values and we do not guarantee the contents. Please use it as a reference when selecting a product. When using the product, be sure to recalculate and check if it meets the conditions of use.
  2. We do not take any responsibility for any damage, disadvantage or trouble caused to users or third parties by using this Calculation Selection Tool or its calculation results.
  3. Contents of the Calculation Selection Tool are subject to change without notice. We take no responsibility for any loss of opportunity due to the changes of the Calculation Selection Tool.