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Extremely handy for use in grinding and setting screw cutting tools, these gages meet the following standards: American National or U.S. 60°, Whitworth or English 55°, and Metric 60°.
They also have a very useful scale for finding the number of threads per inch through graduations in 14ths, 20ths, 24ths and 32nds of an inch on No. C391 and No. C396. Graduations on No. C398M are in mm and 1/2 mm. The No. C391 Gage also has a table of double depths of threads for determining size of tap drills.
Made of spring-tempered steel with satin chrome finish. Gaging surfaces ground.
Center Gage Attachment
No. 392
This attachment is useful for holding Starrett center gages firmly against the lathe arbor or faceplate when setting both internal and external screw cutting tools. A slot containing a flat spring holds the gage and a V groove in the other side permits locating the attachment against the lathe arbor.
Center GagesNo.
C391 60° American NationalNo.
C396 55° Whitworth or EnglishNo.
C398M 60° Metric
| Catalog No. |
EDP No. |
Description |
List
|
| C391 |
51475 |
American Unified National Standard, 60° |
17.00
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| C396 |
51477 |
Whitworth or English Standard, 55° |
20.00
|
| C398M |
51478 |
Metric Standard, 60° |
19.00
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J.W. Donchin Co.
 Ph: 773-261-2182 • Fax: 773-261-2867 • Email: sales@jwdonchin.com
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