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Distributor's Link Magazine Spring 2019 / Vol 42 No2

60 THE DISTRIBUTOR’S

60 THE DISTRIBUTOR’S LINK Larry Borowski President GREENSLADE & COMPANY INC. 2234 Wenneca Avenue, Fort Worth, TX 76102 TEL 817-870-8888 FAX 817-870-9199 EMAIL sales1@greensladeandcompany.com WEB www.greensladeandcompany.com RING GAGES PART 2: ADJUSTABLE THREAD RING SETTING – HOW IT IS DONE In the last issue we laid the groundwork as to what the thread standards require for calibration or setting of adjustable thread ring gages. In this issue, we will get into the “nuts and bolts” of the calibration/setting procedure. The first thing you want to do is either choose a set plug style or familiarize yourself with what you are currently using. There are (2) main types, truncated and progressive. has a Hi pitch diameter section and a Lo pitch diameter section separated by an interruption in the thread form. The basic concept is to set on the Lo (front) end, and the ring should not go onto the Hi (back) end. Next, you want to either choose a style of adjustable ring or familiarize yourself with what you are currently using. There are (2) normal types, and both have locking screws and adjustment screws. These are called AGD or American Gage Design as defined in the ASME B47 standard on Gage Blanks, and there is the Southern Style. Since the American Gage Design (AGD) is the most popular style, this is what we will be covering. TRUNCATED SETTING PLUG AMERICAN GAGE DESIGN (AGD) “SOUTHERN STYLE” PROGRESSIVE SETTING PLUG Truncated setting plugs have a full form and a truncated section with a continuous thread and Pitch Diameter across both. Truncated set plugs are the most common, so we will be focusing on how they are used. As a point of information, a Progressive setting plug TECHNICAL ARTICLE Before starting any calibration, make sure your rings and setting plugs are cleaned and have a fresh coat of light gage oil. Although there are some differences in opinion on how to go about the next step, we are going to approach it with the “if it aint broke, don’t fix it” attitude. First thing is first, you have to thread the ring gage onto the set plug. The variation in approach is that some may remove the sealing wax and loosen the ring before this step, while others will try it on the plug first. CONTINUED ON PAGE 166

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