AIR PLUG GAUGES

Miniature Air Plug Gauges


These are designed to be held in the hand and although they have a restricted measuring range they are ideal for measuring small precision bores.

Plugs up to 2,29mm/0.090in are made from solid tungsten carbide as blind bore versions only. Larger sizes are of tool steel.
Miniature Air Plug Gauges
Miniature APG Diagram
  SIZE RANGE Ø A C D * E * F * Measure range*
(Max)
Through Blind
mm 1.30-2.29 9.6 - 1.5 0.25 1.02 2.3 0.01
2.29-2.64 15.9 6.4 1.5 0.46 1.32 2.4 0.02
2.64-3.00 15.9 6.4 1.5 0.64 1.63 2.5 0.03
inch 0.051-0.090 0.377 - 0.060 0.010 0.040 0.090 0.0004
0.090-0.104 0.625 0.250 0.060 0.018 0.052 0.095 0.0008
0.104-0.118 0.625 0.250 0.060 0.025 0.064 0.100 0.0012
* The use of smaller jets will affect these dimensions and reduce the measuring range.

S-Type Air Plug Gauges


These can be connected direct to the gauge unit or used with a Universal Adaptor Handle or 90° Adaptor. Due to their restricted measuring range, these gauges are normally made as Tolerance plugs but the Pre-size type can be made on request.
S-Type APG


Extensions


For gauging deep holes, extensions of 25 to 375mm in 25mm steps (1in to 15in. in 1inch steps) may be fitted. Extensions for plugs below 14mm/0.55in diameter are factory fitted and must be requested when ordering (max 200mm extension).

S-Type APG Diagram
  SIZE RANGE Ø A Through & Blind B
Through & Blind
C D* E* F* Measure range* (Max)
Through Blind
mm 3.10-4.10 9.6 9.6 - 1.5 0.25 1.02 2.3 0.01
4.20-6.30 15.9 15.9 6.4 1.5 0.46 1.32 2.4 0.02
inch 0.120-0.160 0.377 0.377 - 0.060 0.010 0.040 0.090 0.0004
0.160-0.250 0.625 0.625 0.250 0.060 0.018 0.052 0.095 0.0008
* The use of smaller jets will affect these dimensions and reduce the measuring range.


A&E Gauges is also able to supply tooling for use with other gauging systems. Please refer to our 'Other gauging' section.

M-Type Air Plug Gauges


Available in any of the measuring ranges described below. Unless otherwise stated they are supplied Full Scale. Complete stocks of Tool Steel blanks ensure quick delivery. Other materials or coatings and quick entry leads can be supplied to order, 3-jet plugs are available as standard on diameters exceeding 4mm/0.157in. Special designs for smaller sizes are also available. Ask for details.
M-Type Air Plug
M-Type APG Diagram
  SIZE RANGE Ø A
Through
& Blind
B
Through
& Blind
C D * E* F* Measure range*
(Max)
Through Blind
mm 6.30-8.00 61.1 38.0 13.0 3.0 1.5 3.0 4.5 0.10
8.00-14.00 61.1 38.0 13.0 3.0 1.5 3.0 4.5 0.10
14.00-62.00 64.1 40.0 13.0 3.0 1.5 3.0 4.5 0.10
inch 0.250-0.320 2.41 1.5 0.510 0.120 0.06 0.120 0.180 0.004
0.320/0.550 2.41 1.5 0.510 0.120 0.06 0.120 0.180 0.004
0.550-2.500 2.52 1.57 0.510 0.120 0.06 0.120 0.180 0.004
* The use of smaller jets will affect these dimensions and reduce the measuring range.

L-Type Air Plug Gauges


These are made from Tool Steel or hard chrome plated and are available in both through bore and blind bore versions. It is recommended that these plugs be used on units with a measuring range of 0,1mm/0.004in.
Unless otherwise stated when ordering, 'L' type plugs will be supplied in the Full Scale version although Half Range, Tolerance or Pre-size can be supplied if required.

Quick entry leads are ground on as standard and in order to reduce weight, the larger sizes are made in a 'cruciform' shape. 3 jet plugs are available on all diameters. Gauges larger than 150mm/5.9in can be supplied to special order and are designed to suit the application.
L-Type Air Plug Gauge
L-Type APG Diagram
  SIZE RANGE Ø B C D * E* F* Measure range*
(Max)
Through Blind Through Blind
mm 62.0-150.0 24.0 34.0 13.0 3.0 1.5 3.0 4.5 0.1
inch 2.440-5.900 0.95 1.34 0.51 0.12 0.06 0.12 0.18 0.004
* The use of smaller jets will affect these dimensions and reduce the measuring range.

Universal Adaptor Handle


The handle is supplied with 1,3m/4ft of flexible hose. Bayonet fittings on the handle and hose end provide a rapid and convenient means of applying gauges direct to the work.

NOTE: Flexible Hose upto 2m/6ft can be supplied to order.
APG with Universal Adapter Handle

90º Adaptors


These are designed to assist with the gauging of bores during machining operations. 'S' and 'M' type plugs and adaptors are used in conjunction with the Universal Adaptor Handle, while on 'L' type adaptors the 200mm/8in long hand grip is screw connected. 90º adaptors may also be used in conjunction with air rings.
90º Adaptors

Special Coatings


Standard Air Plug Gauges are made from Tool Steel which gives good wear life. It is possible to specify, at extra cost, Titanium Nitride coating, Tungsten Carbide impregnated plugs or Hard Chromium plated plugs.
Special Coatings