Product Description
The CMT Digital Height Gauge (DHG-001) is a precision measuring tool designed for woodworkers who need fast, reliable height and depth readings at the router table, table saw, or drill press. Supporting three display modes - mm, inch, and fractional inch - this gauge eliminates guesswork when setting router bit height, saw blade height, or hole depth, letting you dial in exact measurements without swapping tools. Its self-standing magnetic base holds the unit upright on steel surfaces so both hands stay free during setup, while the included depth pin reaches into narrow holes and channels that a standard gauge jaw cannot access. The 0-80mm (0-3 1/8 inch) measuring range and 0.05mm (0.002 inch) resolution make it equally useful for fine finish work and production routing.
Key Features
- Three Display Modes (mm, inch, fraction) - switch instantly between metric, decimal inch, and fractional inch readouts so you can match any plan, drawing, or shop standard without manual conversion.
- Measuring Range 0-3 1/8 inch (0-80mm) - covers the full practical range of router bit heights and saw blade projections, handling everything from thin veneers to full-depth cuts.
- Depth Pin Range 0-2 inch (0-52mm) - the slender pin reaches into narrow holes and channels where the main jaw cannot fit, expanding the gauge's usefulness to drill bit depth and mortise depth verification.
- Wide Opening 2.35 inch (60mm) - accommodates large-diameter bits, dado sets, and router bits with big cutting profiles, so you are not limited to small-profile tooling.
- Resolution 0.002 inch (0.05mm) - delivers readings fine enough for precision joinery and furniture work where a fraction of a millimeter changes the fit of a joint.
- Accuracy +/-0.004 inch (+/-0.1mm) - meets the ANSI/US 4200A-2023 standard, giving you a traceable accuracy benchmark for production or quality-control environments.
- Magnetic Self-Standing Base - adheres to cast iron router tables, saw tables, and steel surfaces and stands independently, freeing both hands to position a bit or fence without holding the gauge.
- Horizontal and Vertical Measuring - measures cutting depth in the standard vertical orientation and also lays flat for horizontal tasks such as low-profile backfence adjustment.
- CR2032-3V Lithium Battery - a widely available coin cell keeps the unit compact and lightweight, easy to store in an apron pocket or tool drawer.
- ANSI/US 4200A-2023 Compliant - manufactured to a recognized dimensional measuring instrument standard, supporting confident use in professional and production shop settings.
Why This Product
- Router table setup typically means repeated test cuts to find the right bit height - the 0.002 inch resolution and instant fractional readout let you hit a target dimension on the first try and move straight to production.
- One gauge replaces a separate depth gauge and a height gauge: the wide 2.35 inch jaw handles large-profile bits while the depth pin reaches into holes down to 0-2 inch deep, covering virtually every common shop measuring task.
- The magnetic base is purpose-built for self-standing use on router tables and saw tables, so the gauge stays put on the cast iron surface while you make adjustments - no assistant, no clamp, no third hand needed.
- Horizontal and vertical measuring capability means the same tool that sets bit height can also be laid flat against a fence for backfence height adjustment, reducing the number of tools needed during setup.
Specifications
- Brand: CMT Orange Tools
- Order Number: DHG-001
- Measuring Range: 0-3 1/8 inch (0-80mm)
- Depth Pin Range: 0-2 inch (0-52mm)
- Wide Opening: 2.35 inch (60mm)
- Resolution: 0.002 inch (0.05mm)
- Accuracy: +/-0.004 inch (+/-0.1mm)
- Display Modes: mm, inch, fraction
- Battery: CR2032-3V Lithium (not included)
- Compliance: ANSI/US 4200A-2023
- Country of Origin: Made in Italy
Approved Applications
- Router bit height setting on router tables
- Saw blade height setting on table saws
- Hole depth measurement with the depth pin
- Drill bit height and projection setting
- Low-profile backfence adjustment (horizontal measuring mode)
- Cutting depth setup on router tables
Frequently Asked Questions
Can this gauge measure in both metric and imperial units?
Yes. The gauge supports three display modes - mm, decimal inch, and fractional inch - and you can switch between them on the unit itself. This makes it compatible with metric drawings, imperial shop plans, and fractional woodworking dimensions without any manual conversion.
Does the depth pin work inside narrow holes that the main jaw cannot reach?
Yes. The depth pin has its own measuring range of 0-2 inch (0-52mm) and is designed specifically for narrow holes or channels that are too small for the main 2.35 inch wide jaw. This makes it practical for checking mortise depth, stopped hole depth, and similar precision measurements.
Does the gauge need to be held in place during use, or can it stand on its own?
The gauge is self-standing and includes magnets in the base so it adheres to and stands independently on steel or cast iron surfaces such as router tables and saw tables. It also supports horizontal positioning for backfence adjustment tasks, so it does not need to be held vertically at all times.
What battery does this gauge use and is one included in the box?
The gauge uses a CR2032-3V lithium coin cell battery. A battery is not included and will need to be sourced separately. The CR2032 is a standard size available at most hardware, electronics, and general retail stores.
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