OD Air Ring

Information Required When Ordering

Air Rings for Measurement of Outside Diameters

  • Size and tolerance (including nominal) of diameter to be measured.
  • Type of system and required amplification, magnification or scale, tooling is to be used on. (Federal D-2500, Sheffield 10-M full 15” column, Moore 814 H .0014/. 000020 scale, etc.).
  • Required configuration of air ring (Thru [center jet], close to shoulder, or super close to shoulder). If super close to shoulder, specify required distance from shoulder. Note: length of lands and/or distance from shoulder may determine jet size.
  • Number of jets: 2 jet – roundness, straightness; 3 jet – cloverleaf or lobing condition; 6 jet – average diameter.
  • Clearance required – min., standard, max.
  • Accessories – handles, hose fittings, adapters, etc.
Standard Jet Sizes

Universal, Western, Edmunds, Moore, Standard, Gar, Pratt & Whitney Style Air Probes

  • Size Range

  • Standard Jet Size

  • .060 – .090
    .090 – .125
    .125 – .300
    .300 – 5.000

  • .018
    .025
    .032
    .042

Federal Style Air Probes Model

Standard Jet Size
D-2500 thru D-8000 – .050
EAG-31XXX thru EAG-32XXX – .050
D-10,000 thru D-32,000 – .025
EAG-33XXX thru EAG-XXX – .025

Sheffield Style Air Probes
  • Size Range

  • Standard Jet Size

  • .125 – .300
    .300 – 5.000

  • .047-3/4 Amplification
    .078 Full Amplification

Federal Style Air Probes Model

Probes for Sheffield Column Comparators

Jet Sizes – Capabilities – Technical Information Jet Size Amplification
.078 Full – All Amplifications
.062 Full – 10,000:1 and Lower
.047 3/4
.032 1/2
.025 3/8
.018 1/4
.013 Based on Application

Note: Amplifications listed are standard for corresponding jet sizes. However, all amplifications are obtainable with any jet size. Call for technical assistance.

O.D. Air Ring Quote/Order Request Form

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**Please note pricing under the pricing tab at the top of this page.