Design

This portion of the site references material based on machine tolerances, fits, and hole sizes. References can be located at the bottom of page.

Drill & Tap Size Charts

Inch Drill and Tap Sizes
Metric Drill and Tap Sizes

Hole Tolerances and Fits

Tolerances and Engineering Standards
http://www.cobanengineering.com/Tolerances/TolerancesDefinitions.asp

Hole and Shaft Basis Limits and Fits
http://www.cobanengineering.com/Tolerances/ISOHoleandShaftBAsisLimitsAndFits.asp

O-Ring Grooves, Tolerances and Fits

Tolerances
https://www.marcorubber.com/o-ring-tolerance-index.htm

Sizing Charts
https://www.marcorubber.com/o-ring-size-chart-index.htm

Groove Design Guide
https://www.marcorubber.com/o-ring-groove-design-directory.htm

ISO Standards

ISO Tolerance System For Limits and Fits
http://www.cobanengineering.com/Tolerances/ToleranceSystem.asp

ISO Shaft Tolerances (ISO 286-2) (3mm-400mm)
http://www.cobanengineering.com/Tolerances/ISOShaftTolerances3mmTo400mm.asp

ISO Shaft Tolerances (ISO 286-2) (400mm-3150mm)
http://www.cobanengineering.com/Tolerances/ISOShaftTolerances400mmTo3150mm.asp

ISO Hole Tolerances (ISO 286-2) (3mm-400mm):
http://www.cobanengineering.com/Tolerances/ISOHoleTolerances3mmTo400mm.asp

ISO Hole Tolerances (ISO 286-2) (400mm to 3150mm):
http://www.cobanengineering.com/Tolerances/ISOHoleTolerances400mmTo3150mm.asp

ANSI Standards

ANSI Standard Limits and Fits (ANSI B4.1-1967,R1974)
http://www.cobanengineering.com/Tolerances/ANSILimitsAndFits.asp

ANSI B4.1-1967 Running and Sliding Fits
http://www.cobanengineering.com/Tolerances/ANSIRunningSlidingFits.asp

ANSI B4.1-1967 Locational Clearance Fits
http://www.cobanengineering.com/Tolerances/ANSILocationalCleranceFits.asp

ANSI B4.1-1967 Locational Transition Fits
http://www.cobanengineering.com/Tolerances/ANSILocationalTransitionAndInterferenceFits.asp

ANSI B4.1-1967 Locational Interference Fits
http://www.cobanengineering.com/Tolerances/ANSIForceFits.asp

References

  • F. (2016). Tap & Clearance Drill Charts. Retrieved October 14, 2018, from http://www.fbabolt.com.au/tap-clearance-drill-charts.html

  • Coban Engineering. (2017). Tolerancing and Engineering Standards. Retrieved October 14, 2018, from http://www.cobanengineering.com/Tolerances/ANSILimitsAndFits.asp

  • M. (2018). O-Ring Suppliers Kalrez®, Viton®, Silicone, Gaskets, Seals. Retrieved October 30, 2018, from https://www.marcorubber.com/