Leitech is a famous of thread depth gauge manufacture.

  The GO / NOT GO refers to the inspection of the thread hole against its allowed tolerances. The name derives from the use of the gauge. The gauge represents two tests. The check involves the thread hole having to pass one test (GO) and fail the other (NOT GO).

      The GO / NOT GO test is an integral part of the quality process that is used in the manufacturing industry to ensure interchangeability of parts between processes, or even between different manufacturers.

     Leitech develops, produces, and markets a complete high-end thread gauging system –  the Leitech System.  It is unique as it represents precision measurement of internal threads and thread depths by one single instrument in one single operation. The System Leitech also represents the feature of replaceable inserts. When inserts are worn, they are easily replaced and the gauge is practically renewed.  

The Leitech Digi Gauge is a refined model of the Leitech High-Resolution Gauge. The Digi Gauge reveals the exact measurement on a digital screen. By using the Leitech Digi Gauge you can improve the accuracy of your measurement.

The resolution of the scale on Leitech Digi Gauge System is 0.01 mm/0.0005".

When the requirement for the accuracy is not at this scale, we recommend Leitech Combi gauge, which has a measuring accuracy of 0.5 mm/0.025".

Alternatively, we recommend the Leitech High-Resolution Gauge, which has a measuring accuracy of 0.1 mm/0.005".

Leitech - Digi-COMBI - Thread Depth Gages - (Metric)

Leitech - Digi-COMBI Thread Depth Gages 

• Digital Depth Readout
• Quick reliable check of thread quality and thread depth in one single operation
• RS 232 Opto connection option for statistical data processing wirelessly or by cable
• Quick replacement of worn thread inserts with re-calibration of depth
• Ergonomic operation
• Up to 100% longer inserts, which gives maximum wearability
• Crest of the first full thread on Go in accordance to Federal standard H28/6 which provide
  accurate depth reading

Technical specifications:

• Resolution of 0.01 mm / 0.0005 inches
• Measuring accuracy +/- 0.025 mm / .0001"
• Display switch between mm and inches
• Thread size from 4 mm – 22 mm
• Data output: RS 232 Opto by cable or wireless
• Accuracy of measuring liner is +/-1mμ.
• Repeatability: +/-1mμ due to digital readout.
• Accuracy of depth - Depends on depth calibration of the gage, and operator proficiency.
• Delivery for these run 5-6 weeks

• The COMBI Gage A breakthrough in thread depth control simultaneously measure thread or cylindrical size and depth with the patented Leitech System, the industry's most innovative breakthrough in thread depth control.
• With a direct reading depth scale, the cost effective Leitech COMBI and COMBI HI-RESOLUTION plug gages qualify functional size and depth at the same time.
• Unless otherwise specified, when ordering Handles only furnish the sleeve to accept the largest thread in the handle's range and it will not be marked with a size.
• Standard-Resolution Handle: .025" Division
• High-Resolution Handle: .005" Division

High Resolution Combi Models Now Available

Built-in micrometer eliminates calculation errors. Quicker and more accurate than previous methods.

Above: Standard Combi Thread Gage (.025"/0.5mm Resolution)

• Features vernier scale built right into the gage body. This scale is accurate to a resolution of .005" (inch models) of 0,1mm (metric models).
• Locking device allows user to insert gage into the part being examined, tighten the thumb screw, remove gage and read at users convenience.

Locking Device for Remote Readings or Presetting.

Above: Hi-Resolution Combi: Direct Reading Vernier - 0,1mm increments

Application:

The gage can be user wherever a thread gage with depth steps is currently being utilized. It also eliminates the time consuming method of "counting turns" or using a vernier caliper depth scale - neither of which provide even a close indication of functional depth. The gage can also be provided with plain cylindrical members to check depths of drilled holes. 

Pipe threads, both NPT and NPTF, do not require members with the costly basic step ground in. In addition, 1 pitch lines on the NPT and the 4 step lines for the NPTF are incorporated on the sleeves as a standard feature giving the user total flexibility in usage, and reducing costs. A 6 step plain gage is also available. 

Gaging Procedure:

Gage use is similar to any good quality double ended gage. As the GO member is inserted into the hole, the spring-loaded telescoping sleeve recedes. This provides user with an accurate DEPTH READING GAGE. (NO GO member is used in conventional way.)

  Sowant can offer you  Leitech thread depth gage,  sowant also can offer you HBPV thread gauges, SHARP VEE thread gauge, API BCSG thread gauges, mitutoyo, insize .Mahr more information ,please contact with us