Comtorgage Expansion Plug Prices

Comtorgage expansion plugs are custom made for a wide variety of applications.

Some sample internal applications:

  • 2-point and 3-point diameter, including very deep bores and diameters at specific depths
  • Diameter of thin-walled flexible parts that do not stretch
  • Interrupted diameters (evenly or unevenly spaced)
  • Groove diameter
  • Tapered bore diameter
  • Spherical diameter
  • Trepan diameter (outer ID), or a diameter with an obstruction in the center
  • Thread minor diameter or pitch diameter
  • Spline or gear major diameter, minor diameter, or pitch diameter (even or odd numbers of teeth)
  • Internal widths between parallel planes, such as keyways
  • Internal widths of square or hex shapes

Some sample external applications:

  • Pilot diameter, hub diameter, or shaft diameter
  • Groove diameter
  • Trepan diameter (center OD)
  • Thread major or pitch diameter
  • Spline or gear major diameter, minor diameter, or pitch diameter

Most of these applications must be specifically quoted to your prints. Please contact us for a quote.

However, the simplest application, which is an internal bore, may not require a specific quote. Comtorgage makes 2-point contact expansion plugs per their standard design, which are priced below. Note that although they are built to a standard design, these expansion plugs are not off-the-shelf. Each one is built to a specific diameter and tolerance requirement, and there are many alterations available to meet specific requirements.

Standard Two-Point Contact Bore Diameter Expansion Plug Prices1

Nominal Bore Diameter
Minimum Bore Length2
Standard Inreach3
For Use with Amplifier or Electronic Coupler Models:
1CM1

1CM1M

CM1

CM1M

CM2

CM2M

CEM-410

CEM-420

CM3

CM3M

CM4

CM4M

CEM-430

CEM-440

CM6

CM6M

CEM-460

CM8

CM8M

CEM-480

CM10

CM10M

CEM-4100

Qty. 1
Qty. 24
Qty. 1
Qty. 24
Qty. 1
Qty. 24
Qty. 1
Qty. 24
Qty. 1
Qty. 24
.0930" to .1099"

2.362mm to 2.792mm

Same as Bore Diameter
.37"
$659.00
$593.10 ea.
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.1100" to .1199"

2.793mm to 3.046mm

Same as Bore Diameter
.37"
$611.00
$549.90 ea.
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- - -
- - -
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.1200" to .1249"

3.047mm to 3.173mm

Same as Bore Diameter
.37"
$660.00
$594.00 ea.
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.1250" to .1699"

3.174mm to 4.316mm

.15"
.37"
$684.00
$615.60 ea.
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.1700" to .2809"

4.317mm to 7.136mm

.22"
.50"
$580.00
$522.00 ea.
$580.00
$522.00 ea.
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.2810" to .3439"

7.137mm to 8.736mm

.31"
1.0"
$575.00
$517.50 ea.
$575.00
$517.50 ea.
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.3440" to .5349"

8.737mm to 13.587mm

.40"
1.0"
$480.00
$432.00 ea.
$480.00
$432.00 ea.
$480.00
$432.00 ea.
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- - -
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.5350" to .8699"

13.588mm to 22.096mm

.50"
1.69"
$493.00
$443.70 ea.
$493.00
$443.70 ea.
$493.00
$443.70 ea.
$533.00
$479.70 ea.
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.8700" to 1.7499"

22.097mm to 44.448mm

.50"
1.69"
$426.00
$383.40 ea.
$426.00
$383.40 ea.
$491.00
$441.90 ea.
$521.00
$468.90 ea.
$551.00
$495.90 ea.
1.7500" to 2.9999"

44.449mm to 76.198mm

.50"
1.69"
$452.00
$406.80 ea.
$452.00
$406.80 ea.
$517.00
$465.30 ea.
$547.00
$492.30 ea.
$577.00
$519.30 ea.
3.0000" to 4.4999"

76.199mm to 114.297mm

.50"
2.19"
$617.00
$555.30 ea.
$617.00
$555.30 ea.
$682.00
$613.80 ea.
$712.00
$640.80 ea.
$742.00
$667.80 ea.
4.5000" to 5.9999"

114.298mm to 152.398mm

.62"
2.19"
$725.00
$652.50 ea.
$725.00
$652.50 ea.
$790.00
$711.00 ea.
$820.00
$738.00 ea.
$850.00
$765.00 ea.
6.0000" to 6.9999"

152.399mm to 177.798mm

.62"
2.19"
$823.00
$740.70 ea.
$823.00
$740.70 ea.
$888.00
$799.20 ea.
$918.00
$826.20 ea.
$948.00
$853.20 ea.
7.0000" to 7.9999"

177.799mm to 203.198mm

.75"
2.19"
$870.00
$783.00 ea.
$870.00
$783.00 ea.
$935.00
$841.50 ea.
$965.00
$868.50 ea.
$995.00
$895.50 ea.
8.0000" to 8.9999"

203.199mm to 228.598mm

.75"
2.19"
$947.00
$852.30 ea.
$947.00
$852.30 ea.
$1,012.00
$910.80 ea.
$1,042.00
$937.80 ea.
$1,072.00
$964.80 ea.
9.0000" to 9.9999"

228.599mm to 253.998mm

.75"
2.19"
$992.00
$892.80 ea.
$992.00
$892.80 ea.
$1,057.00
$951.30 ea.
$1,087.00
$978.30 ea.
$1,117.00
$1,005.30 ea.
10.0000" to 10.9999"

253.999mm to 279.398mm

.75"
2.19"
$1,131.00
$1,017.90 ea.
$1,131.00
$1,017.90 ea.
$1,196.00
$1,076.40 ea.
$1,226.00
$1,103.40 ea.
$1,256.00
$1,130.40 ea.
11.0000" to 11.9999"

279.399mm to 304.798mm

.75"
2.19"
$1,275.00
$1,147.50 ea.
$1,275.00
$1,147.50 ea.
$1,340.00
$1,206.00 ea.
$1,370.00
$1,233.00 ea.
$1,400.00
$1,260.00 ea.
12.0000" to 12.9999"

304.799mm to 330.198mm

.75"
2.19"
$1,321.00
$1,188.90 ea.
$1,321.00
$1,188.90 ea.
$1,386.00
$1,247.40 ea.
$1,416.00
$1,274.40 ea.
$1,446.00
$1,301.40 ea.
1 Expansion plugs for many special applications are also available - contact us with your application

2 Bores that are shorter require an optional back-of-head relief - contact us for a quotation

3 Additional inreach is available for most expansion plugs - contact us with your requirements

4 Quantity three or more of the same size, subtract 15% from the quantity 1 price

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