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Lead Screw Engineering Calculators
Torque-Forward Drive Calculator
Torque (in lbs.)
Load (in lbs.)
Lead (in/rev)
Efficiency
Torque =
in.lbs.
Torque Backdrive Calculator
Torque (in lbs.)
Load (in lbs.)
Lead (in/rev)
Backdrive Efficiency
Torque =
in.lbs.
Key Torque-Forward Drive Calculator
Torque (in lbs.)
Load (in lbs.)
Lead (in/rev)
Forward drive Efficiency
Torque =
in.lbs.
Key Torque-Backdrive Calculator
Torque (in lbs.)
Load (in lbs.)
Lead (in/rev)
Backdrive Efficiency
Torque =
in.lbs.
Speed Calculator
Speed (in./min.)
Lead (in/rev)
Rotational Speed (rpm)
Speed =
in./min.
Drive Horsepower-Rotary Calculator
Drive Horsepower-Rotary (hp)
Drive Torque (in lbs.)
Rotational Speed (rpm)
Drive Horsepower-Rotary =
hp
Drive Horsepower-Linear Calculator
Drive Horsepower-Linear (hp)
Load (lbs.)
Speed linear (in/min)
Drive Horsepower-Linear =
hp
Critical Speed Calculator
Critical Speed (rev/min)
Minor Diameter (in)
Factor of safety
Unsupported Length (in)
End Fixity Factor
Fixed-free: 0.32
Supported-supported: 1.00
Fixed-supported: 1.55
Fixed-fixed: 2.24
Critical Speed =
rev/min
Column Loading Calculator
Column Loading (lbs)
Maximum safe column load (lbs)
Factor of safety
End Fixity Factor
Fixed-free: 0.25
Supported-supported: 1.00
Fixed-supported: 2.00
Fixed-fixed: 4.00
Column Loading =
lbs
Efficiency – Power Screws – Forward Drive Calculator
Forward Drive Efficiency
Lead Angle (degrees)
Thread angle in normal plane (degrees)
Coefficient of friction
Forward Drive Efficiency =
Efficiency – Power Screws – Backdrive Calculator
Backdrive Efficiency
Lead Angle (degrees)
Thread angle in normal plane (degrees)
Coefficient of friction
Backdrive Efficiency =
Lead Angle Calculator
Lead Angle (degrees)
Lead (in/rev)
Screw pitch diameter (in)
Lead Angle =
degrees
Wear Life for Ball Screws Calculator
Wear Life for Ball Screws (in)
Operating load rating (lbs)
Actual load (lbs)
Wear Life for Ball Screws =
in
Acceleration Force Objects in Linear Motion Calculator
Acceleration Force, Linear Motion (lbs)
Weight of object (lbs)
Change in linear speed (ft/min)
Time period to accelerate (sec)
Acceleration Force, Linear Motion =
lbs
Acceleration Torque Objects in Rotary Motion Calculator
Acceleration Torque, Rotary Motion (ft lbs)
Rotational inertia of object (lbs ft2)
Change in rot. speed (rpm)
Time period to accelerate (sec)
Acceleration Force, Rotary Motion =
ft lbs