Acme and Lead Screw Calculators - Nook Industries, Inc. PowerAc Acme Screws and Nuts

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Nook Industries provides a complete selection of inch and metric Ball Screws, Roller Screws, Acme Screws, Lead Screws, End Bearing Supports, Precision Locknuts, Worm Gear Screw Jacks, Electric Actuators, HRC 60 Linear Shafting, Linear Bearings and Pillow Blocks to the Linear Motion Industry.

ACME & LEAD
SCREW ASSEMBLIES

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ACME AND LEAD SCREW CALCULATORS
Horsepower or Kilowatt PV Value Unit Converter		Critical Speed Column Strength

INCH ACME AND METRIC LEAD SCREW CALCULATORS
HORSEPOWER – The amount of power needed to drive a load. The calculator takes the input shaft speed and the torque required for a given load and derives the amount of horsepower or kilowatts expended. It can also back-calculate either the torque or the speed resulting from a particular power requirement.
HorsePower		Kilowatt

PV VALUE – An acme/trapezoid nut material limitation based on speed and pressure. Unit pressure on the nut (P) and surface velocity at the nut/screw interface (V) limit the use of a particular material in an application because of the resulting heat build up and accelerated wear. All Nook Industries nut materials have a limiting PV value. This calculator compares the actual operating load and speed against the PV rating of the chosen material. Calculations for PlastAC materials in inch and metric units are available.
Inch Plastic PV		Metric Plastic PV

CRITICAL SPEED – The input speed which excites the resonant frequency of a system. The calculator uses the diameter, unsupported length and end fixity to determine the approximate rotational speed at which resonance will occur. It can also back-calculate to determine the diameter or length based on a specific screw rpm. See the Critical Speed Chart to verify the correct screw for the application.
Inch Acme Critical Speed		Metric Lead Critical Speed

COLUMN STRENGTH – The compression load at which a column will fail due to bending or buckling. The calculator uses the diameter, unsupported length and end fixity to determine the approximate minimum diameter required to support a given load. It can also back-calculate to determine the diameter or length based on a specific load. See the Column Strength Chart to verify the correct screw for the application.
Inch Acme Column Strength		Metric Lead Column Strength

UNIT CONVERSION –Conversion between Inch and Metric units. The calculator converts the common unit values used throughout the Nook Industries web site.
Unit Converter
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	Nook Industries awarded a spot on Network World's 2005 Enterprise All-Star list. Nook was selected for its CAD model web tool that lets customers configure and download products instantaneously.
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NOOK INDUSTRIES, INC. - An ISO 9001:2000 Registered Company
4950 East 49th Street | Cleveland, Ohio 44125 | phone: (216) 271-7900 or (800) 321-7800 | fax: (216) 271-7020

Nook Industries provides a complete selection of inch and metric linear, mechanical and electromechanical actuators to the Linear Motion and Power Tarnsmission Industries. Modular Linear Actuators, Precision Profile Rails, Ball Screws, Roller Screws, Acme Screws, Lead Screws, Ball Splines, End Bearing Supports, Precision Locknuts, Worm Gear Screw Jacks, Electric Cylinder Actuators, HRC 60 Linear Shafting, Linear Slides, Bearings and Pillow Blocks.
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