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The Starrett 440, 445 Vernier Depth Gauges, Ratchet Stop, Lock Nut, Micrometer Type, Inch, depending on the model, have a measurement range of 0 to 3", 0 to 6", 0 to 9", or 0 to 12"; a resolution (or smallest graduation interval) of 0.001"; with + or – 0.0001" of accuracy. The vernier scale enables precise measurements in fine units. These gauges include 1/8" diameter measuring rods to cover the intended range. The bases are available in a choice of 2.5", 3", 4", or 6" long, and all measuring surfaces of these units are hardened, ground, and lapped for durability and accuracy. These gauges have a ring-type knurled lock nut, ratchet, and speeder for stability and to apply uniform pressure and make quick adjustments for precise measurements. These units include a protective case. Depth gauges are typically used in manufacturing, machining, and mechanical engineering.
Depth gauges are precision measuring instruments used to determine the depth of any shape that has a step, groove, or slot. These gauges often take the form of sliders that travel on a measuring beam or rods, are moved to position by hand, and then adjusted with a calibrated screw. The base of the gauge rests at the top of the shape whose recession is to be measured, while the beam or rods extend to the bottom of the recession to determine the measurement. Gauge position is read from a graduated scale, dial, counters, or an electronic display.
The L.S. Starrett Company manufactures precision measuring tools, metrology and testing equipment, and saw blade products. The company, founded in 1880, is headquartered in Athol, MA.
From the Manufacturer
The purpose of this tool is to measure the depth of holes, slots, shoulders, and projections quickly and easily.
Tony Benavides
Reviewed in the United States on July 31, 2023
This is an excellent set that I've already used a few times for my gunsmithing business. It's an invaluable tool. I highly recommend.Tony.
Clayton
Reviewed in the United States on February 12, 2022
The lock seems to randomly rub the stem. This leads to inaccurate measurements at times. Seems like a second or less quality version. My other Sterrett micrometers are of a much better quality.
Robert Mitchell
Reviewed in the United States on December 7, 2022
The product was in excellent condition, and it arrived in a matter of days
Christopher England
Reviewed in the United States on April 8, 2020
What can I say? When you buy something and immediately put it to use without anything remarkable or noticeable happening, that may seem a bit dull and not worth commentary. But with measuring tools, I think that's exactly what you want. Expectations met. 5 Stars.
Donald Ivemeyer
Reviewed in the United States on August 4, 2015
Great product of precision quality1
La monte
Reviewed in the United States on May 15, 2015
Excellent deal!!!!!
Kyle K.
Reviewed in the United States on October 12, 2014
After using it every day for 4 year is still as accurate as the day it was first used.
David Knuth
Reviewed in the United States on February 22, 2013
Works flawlessly, high quality, and precise, living up to the quality and history that Starrett carries in the machining industry.
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