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CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

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Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

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A white paper to assist in the evaluation of 3D scanning hardware solutions.

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grain per hour per square foot per inch of mercury (0°C)
Symbol:  grain/hr-ft2-inHg (0 °C) 
Category:  Permeability 
SI Equivalent:  5.72136×10-11 kg/N-s
Dimension L-1
System:  US 
 
Notes
1 grain/hr-ft2-inHg is defined as 1 perm.
Convert     grain/hr-ft2-inHg (0 °C)  
1 grain/hr-ft2-inHg (0 °C) =
Permeability
  Symbol Unit Name
5.72136×10-11  kg/N-s  kilogram per newton per second 
perm (0 °C)  perm (0°C) 
0.995841  perm (23 °C)  perm (23°C) 
Glossary
CNC Machining Design Guide

Optimize your designs, reduce machining time, and lower your costs.

Selecting the Right 3D Printer

Discover how to choose the right 3D printer for your needs and the key performance attributes to consider.

STEM Career Outlook

Wages, employment opportunities, and growth projections for STEM jobs.

3D Scanners

A white paper to assist in the evaluation of 3D scanning hardware solutions.