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Small Hole Gages The No. 829 Series, full-ball gages are used for general work. Small Hole Gages These small hole gages are well balanced tools that are ideal for accurately measuring small holes, slots, grooves, and recesses in all kinds of work. They all feature: Hardened-ball measuring surface with two-point contact Radius on each gage is less than the minimum diameter to be measured, which provides the two-point contact necessary for maximum accuracy Smooth, sensitive adjustment for better feel, giving more accurate measurements The adjustment of the gage beyond their range is restricted by a safety stop that prevents breakage Accurate measurements are obtained by slightly "rocking" these gages in the hole to be measured. This will guarantee contact at the true diameter. The final size is then obtained by measuring over the ball contacts with a micrometer. |
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Small Hole Gages These gages are exactly the same as the No. 829 Series except that the gaging surface is a half-ball with a flat bottom. This permits use in even the most shallow holes, slots, and recesses. |
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Small Hole Gages These gages are exactly the same as the No. 831 Series except that all gages are only 2" (50 mm) long, making them convenient to use in close quarters. |
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Telescoping Gages Starrett telescoping gages are used for determining the true size of holes, slots, and recesses up to 6" (150 mm). The ends of both contacts are hardened and ground to a radius to allow proper clearance on the smallest hole the gage will enter. These tools must be slightly "rocked" in the hole being measured to ensure that the tool is on the proper diameter before it is locked and withdrawn. The final hole size is obtained by measuring over the gage contacts with a micrometer. Each of these gages feature a handle, one rigid contact arm and one spring-tensioned telescoping contact arm. |
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Telescoping Gages The No. 579 Series is similar to the No. 229 Series except that is has a slightly greater range, and the handles are rigidly attached to the contact plungers and are automatically self-centering. Also, the No. 579 gages have two telescoping contacts. Constant spring tension gives uniform contact pressure and both plungers are easily locked at any desired setting. |
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Taper Gages These are named "taper" gages only because of their shape. They do not measure taper, but they do measure hole and slot sizes. They are quick to use, very accurate, and are a convenient size. The No. 267 is specially designed for rapid, accurate checking of inside diameters of tubing. Also very useful for general gaging of slot widths, hole sizes, setting calipers, etc. This gage has thin, tapered leaves graduated to measure inside diameters or widths from 1/16" to 1 1/16" in 64ths of an inch. They are made of nicely finished spring-tempered steel, approximately 1" wide by 5 1/4" long. |
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Taper Gages These gages are for determining hole sizes in dies and all kinds of other work. They are read in thousandths of an inch or 0.02 mm. Made of tempered steel, with a locking device for fixing any leaf in position for use. |
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Taper Gages The Starrett No. 270 Taper Gage is a very useful tool, especially for bearing work and for gaging slots. The gage is made of quality tool steel 7/16" (11 mm) wide by 6 1/4" (160 mm) long and is accurately tapered throughout its entire length for quick and convenient measuring of slot widths, etc. Although a bit expensive, this tool can and has been used as a precision shim. One side is graduated from .010" to .150" in thousandths of an inch and the reverse side from 0.3 mm to 4 mm in one-twentieth of a mm (0.05 mm). |