1-2-3 MicroGage  Zoom

1-2-3 MicroGage

Item #: 37876
Each In Stock
Shipping Restrictions: Ground Transportation Only


Bring machine shop accuracy to your workshop! Align, measure, calibrate and tunea variety of tools including routers, shapers, jointers, planers, drill presses, fences andmore. 1-2-3 block is made of hardened tool steel and ground to 0.0002" for ultraprecision. Dial indicator has 1" travel with 0.001" accuracy. Includes a round tip for useon flat surfaces and a 3/8" diameter flat tip for use on round and sharp surfaces suchas jointer knives. Indicator carriage assembly slides smoothly along the entire block andis secured in position with a lock screw.

Two rare earth magnets hold the dial indicator to the carriage assembly.

Tech Spec

Manufacturer Part Number 115-01
Weight (lbs) 1.7000


Customer Reviews

1 Review(s)

View All


Mark C from Medford, MA Posted June 5, 2010
WHAT PRECISION DO YOU NEED?A house framer once told me there's no such thing as an eighth of an inch. A friend who has a metal shop said that accuracy of 1/100 inch is unusable. What YOU need depends on the work you are doing. My range is 1/8" to 1/128"; what matters is what I can see and feel.With patience, you can achieve a high accuracy in woodworking, but it is limited by your measuring tools more than your cutting tools. You can't achieve 1/32" accuracy with with tools that measure to 1/16".Accuracy is essential for fine cabinetry if you don't want to see gaps; making joints fit well; small scale work; templates and jigs; measuring or maintaining tools; using materials like plastic, metal, hardware.ABOUT THE 123 MICROGAGEThere are three main parts, which can be used together or separately for a variety of purposes. The setup block is a precision 1x2x3" steel block, common in metal shops. Mine measured 1.00005 with a friend's 4 1/2 digital caliper.The dial gauge markings of 0.001" have space to allow interpolation. It includes a round tip for measuring flat things, and a flat tip for measuring things with a round end or point (a bit or blade tip).The third piece is a clever assembly of two aluminum pieces, two tiny but powerful magnets, a set screw to holds in the gauge, and a nylon thumb screw to hold the block and the gauge together. It slides smoothely along the block. It is beautifully made, with the right amount of play to snap onto the setup block. You can position the gauge along the 1-inch wide edges, where it stays because of the magnet, and tighten the thumbscrew to lock it.USESThe 4-page manual presents many uses and positions of use: a depth gauge for table saw blades and router bits; it can check the depth of a hole or groove. It can measure runout, which affects the width of your router groove or drilled hole, and whether you need new bearings. It can check fence and table alignment, or measure thickness of materials or tools (e.g. drill bit). The setup block can square in three dimensions at once or serve as an accurate reference of 1". The gauge can be used in other jigs.I have used it with my table saw, router, and drill press. The manual gives applications for radial arm saw, chop saw, band saw, jointer, and planer. DIGITAL OR ANALOG MEASURINGDigital devices have precise displays, but may not be as accurate as the display. Numbers are rounded to the nearest digit. The Wixey digital caliper, has precision of .001", but the specs say it is accurate to +/- .002".The 123 MicroGage has markings of 0.001" with space between them for interpolation. Once zeroed, it is very accurate. For measuring depth, you can creep up to the marking line, which you can't do with a digital gauge. But an analog gauge does not show you digits or the nearest fraction; you have to read where pointers are pointing, and if you want fractions, convert. An analog gauge needs to be kept clean to run smoothly. Digital gauges do not have gears to get dirty and jam. But assuming this gauge is kept dry, it seems sealed well to stay clean in a woodshop.I use both in my shop.COMPARISON TO A DIGITAL DEPTH GAUGEI tried one of the first digital depth gauges. It was plastic, and had a small magnet to hold it in place. It took some pressure to move the sensor, so when I cranked up the blade, it pushed the gauge out of position. Holding while cranking was inconvenient, so I returned it.The 123 block is metal, heavy enough to stay in place. The dial gauge does not require much pressure to change. I can place it over the blade, then go to the front of the saw and crank; the gauge stays in place, and it is easy to read the dial.BOTTOM LINE: This tool is a pleasure to use and brings new measurement capabilities to my shop.

Write Your Own Review

Only registered users can write reviews. Please, log in or register


  • 1-2-3 MicroGage Review

What People are Saying:

I have been ordering from Rockler for almost 20 years and have found their products to be very inexpensive and of high quality. Shipping is fast even when an item is back ordered. The best prices I have found anywhere."

- Orval - 08/07/2012

What People are Saying:

I have been ordering from Rockler for almost 20 years and have found their products to be very inexpensive and of high quality. Shipping is fast even when an item is back ordered. The best prices I have found anywhere."

- Orval - 08/07/2012
Feedback X