Acme Screw Engineering Resources
Helpful acme screw related technical resources.
Engineering Calculators
PV Value
Inch Plastic
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 both Nook BronzAC and PlastAC materials in inch and metric units are available.
PV Value
Metric Plastic
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 both Nook BronzAC and PlastAC materials in inch and metric units are available.
All Calculators
Critical Speed, Horsepower, etc...
A link to all Engineering Calculators including critical speed, horsepower, column strength, and unit conversion.
Technical Information
Screw Alignment
Detailed instructions on how to properly align a ball screw or acme screw carriage assembly including end support blocks.
Temperature/Materials
Detailed temperature and material characteristics for all of of Nook product lines.
Boot Templates
Use the following boot template forms to help define the boot requirements of your application. Then submit it to one of our experts for their assistance in selecting the ideal boot solution for your application.
Thread Forms
Detailed technical descriptions of common acme screw thread form terms including types, pitch, lead, and accuracy.
Load Definitions
Technical information regarding the basics of acme screw load terminology including static loading, dynamic loading, tension loading, compression loading, etc...
Quick Reference
EZZE Mounts
A quick reference guide for mating acme screws to EZZE Mount support bearings.
Design Considerations
Technical information regarding some common acme design considerations used during the selection process.
Wear Indicator Nut
Wear-indicator nuts can be added in retrofit in some applications and are ideal for new system designs. Overall, wear-indicator nuts are designed so that operators and maintenance staff can detect wear before the nut has potential to cause damage or injury from stripping.