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ElasTek™ ASTM D3767 Digital Thickness Gauge: Description
ElasTek™ ASTM D3767 Digital Thickness Gauge
ASTM D3767 Thickness Gauge
ElasTek™ Testing Instruments by CCSi
The ElasTek™ ASTM D3767 Digital Thickness Gauge is specifically engineered for measuring the thickness of all types of test specimens, where conformance to ASTM D3767 Procedures A, A1, or A2 is necessitated. Although configured for D3767 dimensional measurements, the gauges may also be used for “standard measurements” ... virtually eliminating the need for multiple or dedicated gauges.
Each ElasTek™ ASTM D3767 Digital Thickness Gauge is individually assembled and calibrated to assure that the inherent frictional resistance of the mechanism, as well as the force introduced by the mass of the movement assembly, are ultimately considered.
Additionally, each mass is matched to the selected stem and contact combinations to attain an optimal “pressure” profile.
Supplemental stem, mass, and contact sets are available to allow this digital gauge to be easily modified to measure virtually any size and hardness combinations of test specimens. Simply replace the exchangeable mass, contact, or stem to suite the application!
The granite base provides an accurate reference plane as well as a stable support, the mass being sufficient to prevent unintended movement. It is a hard, smooth contact surface, which is easily cleaned and impervious to most environmental effects.
ElasTek™ ASTM D3767 Digital Thickness Gauge: Features
Digital Indicator:
  1. LCD Readout: character height 7.75 mm (.305 in);
  2. Switchable Metric / Inch Display;
  3. Indicator Resolution: .01 mm / .0005 in;
  4. Peak Read Hold;
  5. Hi / Lo Tolerance Settings;
  6. Floating Zero, allows the setting of Zero at any position of the spindle;
  7. 25.4 mm (1 inch) Stem Travel (lifting lever included);
  8. 5.6 and 9.525 mm (0.250 and 0.375 in) diameter contacts included;
  9. NIST Traceable Certified Mass (matched to 9.525 mm contact foot).
SPC Output:
  1. RS232;
  2. BCD;
  3. MTI;
Power Sources:
  1. Replaceable 3 VDC Lithium CR2450 Batteries (included);
  2. VAC/VDC Adapter, 110 or 220 VAC 50/60 Hz, (optional);
  3. Regulated 5 VDC through the Data Port.
Gauge Support:
  1. Granite Base:
  2. Laboratory Grade AA;
  3. NIST traceable Certificate of Accuracy;
  4. 152.4 x 152.4 x 50.8 mm (6 x 6 x 2 inch).
Support Column:
  1. Diameter: 31.75 mm (1.25 inch) Ø;
  2. Height: 203.2 mm (8 inch) ;
  3. Throat Depth: 1.75 inches (44.45 mm);
  4. Maximum Height: 152.4 mm (6 inch), less indicator;
  5. Fine height adjustment knob.
ElasTek™ ASTM D3767 Digital Thickness Gauges: Electronic Remote Readout
ElasTek™ Electronic Remote Readout
ERR—20 Digital Readout
The optional Electronic Remote Readout option allows the measurement determination to be viewed from virtually any angle. It is ideally suited for high—volume applications.
The push—button controls, located on the face of the standard digital gauge, are incorporated as toggle—switch controls on the face of the ERR—20.
The SPC output is located on the rear panel. A 115 VAC / 6 VDC transformer is also included.
ElasTek™ ASTM D3767 Digital Thickness Gauges: Contact Foot / Mass Selection
It is widely recognized that the hardness of many materials is not routinely determined employing ASTM D1415 Standard Test Method for Rubber Property — International Hardness or International Rubber Hardness Degrees (IRHD).
As a matter of practicality, the value of 35 IRHD may be supplanted with a value of D2240 Type A 40/1. However, it is imperative that materials be tested to determine their actual IRHD value, and that any correlation between the two values shall be ascertained on a material specific basis in an empirical fashion.
Note Please note that the contact / optimal mass selection given below, and in ASTM D3767, is intended as a guide. Any appropriate combination, in that the proper pressure is applied to the test specimen, may be used to suite a particular application. Commercially available contacts may also vary from the stated diameters, hence the mass used with them will change accordingly.
The “Optimal Mass” may be considered that which would cause the pressure (kPa / psi) to be applied by a “contact” of the stated diameter with no gauge or mechanism involved, as if by gravity, as given below (ASTM D3767 Table 1):
Materials Above 35 IRHD: Application of 22 kPa (3.2 psi)
Contact Diameter Ø Optimal Mass Maximum Mass Minimum Mass
10.0 mm 176 g 215 g 138 g
8.0 mm 113 g 138 g 88 g
6.3 mm 70 g 85 g 55 g
6.0 mm 63 g 77 g 50 g
5.0 mm 44 g 54 g 34 g
4.0 mm 28 g 34 g 22 g
3.2 mm 18 g 22 g 14 g
Materials Below 35 IRHD: Application of 10 kPa (1.5 psi)
Contact Diameter Ø Optimal Mass Maximum Mass Minimum Mass
10.0 mm 80 g 97 g 64 g
8.0 mm 52 g 62 g 41 g
6.3 mm 32 g 38 g 25 g
6.0 mm 29 g 35 g 23 g
5.0 mm 20 g 24 g 16 g
4.0 mm 13 g 15 g 10 g
3.2 mm 8 g 10 g 7 g
ElasTek™ D3767 Digital Thickness Gauges: Bradnick—Warner Specimen Support Fixture
Bradnick—Warner Specimen Support Fixture
Bradnick—Warner Specimen Support Fixture
The optional Bradnick—Warner Specimen Support Fixture, as described in ASTM D3767 (refer to Figure 3 of the method), is designed for use with the dimensional measuring instruments described Procedures A, A1, and A2.
This device is designed to accommodate specimens which are small, thin, or irregularly shaped. It is placed over the instrument platform and is secured with a standard ¼—20 hexagonal bolt.
The fixture's base has a centrally located orifice to accept various inserts, either the 3 standard inserts (included), those which are designed for special use (available on request), or those designed for use with other instruments, such as the Shore® Type M MicroHardness Durometer, also available from CCSi.
Support Fixture: Standard Base Insert
Standard Base Insert
Support Fixture: Standard Cylindrical Insert
Standard Cylindrical Insert
Support Fixture: Standard Domed Insert
Standard Domed Insert

Index Terms: ASTM, ASTM D3767, D3767, thickness gage, thickness gauge, dimensional measurement, Bradnick-Warner, dial indicators, analogue, analog, digital, indicators, thickness gauges, thickness gages, snap gauge, snap gage, rubber thickness, elastomer, measurement of dimensions, Standard Practice for Rubber - Measurement of Dimensions, 83.060.
Copyright © 2006 CCSi, Inc. • All Rights Reserved • Published August, 2006
Corporate Consulting, Service & Instruments, Incorporated
221 Beaver Street • Akron, Ohio 44304 USA
Telephone: 800.742.8535 / 330.376.3600 • Facsimile: 800.229.9329 / 330.376.8500