Quantcast TYPES OF MICROMETER CALIPERS - 14001_66

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
Figure 2-21.—Common types of micrometers. the point of contact of the two lower caliper legs. In this figure the inside caliper is being adjusted to the size of the outside caliper. As careful measurements with calipers depend on one’s sense of touch, which is spoken of as “feel,” calipers are best held lightly. When you notice a slight drag, the caliper is at the proper setting. CARE Keep calipers clean and lightly oiled, but do not over oil the joint of firm-joint calipers or you may have difficulty in keeping them tight. Do not throw them around or use them for screwdrivers or pry bars. Even a slight force may spring the legs of a caliper so that other measurements made with it are never accurate. Remember, calipers are measuring instruments and must be used only for the purpose for which they are intended. PRECISION MEASURING EQUIPMENT In much wider use by ABEs than even common calipers are the various types of micrometer calipers. As was stated earlier, you can use micrometer calipers to take accurate measurements to the nearest one ten-thousandth of an inch. However, in most applications a measurement to the nearest one-thousandth of an inch is considered acceptable accuracy. These measurements are expressed or written as a decimal (0.0001, 0.001, 0.01), so you must know how to read and write decimals. TYPES OF MICROMETER CALIPERS There are three types of micrometer calipers, commonly called micrometers or simply mikes, used throughout the Navy: the outside micrometer, including the screw thread micrometer; the inside micrometer; and the depth micrometer. (See fig. 2-21.) The outside micrometer is used for measuring outside dimensions, such as the outside diameter of a piece of round stock or the thickness of a piece of flat stock. The screw thread micrometer is used to determine the pitch diameter of screws. The inside micrometer is used to measure the inside diameter of a cylinder or hole. The depth micrometer is used for measuring the depth of a hole or recess. Outside Micrometer The nomenclature of an outside micrometer is illustrated in figure 2-22. The sleeve and thimble scales of a micrometer (fig. 2-23) have been enlarged and laid out for demonstration. To understand these scales, you need to know that the threaded section on the spindle, which revolves, has 40 threads per inch. Therefore, every time the thimble completes a revolution, the spindle advances or recedes 1/40 inch, or 0.025 inch. Note the horizontal line on the sleeve is divided into 40 equal parts per inch. Every fourth graduation is 2-8



Aviation News
FAA Statement-Update on Chicago Air Traffic Facility
FAA continues to manage high levels of air traffic in...
faa.gov
First A350 XWB for Vietnam Airlines enters final assembly
Final assembly of the first A350 XWB for Vietnam Airlines...
airbus.com
Airbus A350-900 receives EASA Type Certification
Major milestone achieved on time, on cost and on quality...
airbus.com
Israel Air Force Emphasizes Ground-Based Training at New Training Center for M-346
The M-346 trainer aircraft in flight. Photo: Wikipedia [Avionics Today...
aviationtoday.com
Made in the USA: Embraer, Sierra Nevada Unveil First A-29 Super Tucano
The first US built A-29 Super Tucano aircraft. Photo: Embraer...
aviationtoday.com
Exelis Reports NextGen ADS-B Program ‘On Budget and On Schedule’
Diagram of ADS-B airspace. Photo: FAA [Avionics Today 09-30-2014] Exelis,...
aviationtoday.com
FAA Statement-Update on Chicago Air Traffic Facility
Flights continue to increase into and out of Chicago-area airports...
faa.gov
FAA Announces 30-day Review
Huerta calls for full review of FAA contingency plans and...
faa.gov
Brazil Looks to Modernize ATM with Indra Radio Navigation DVOR/DME Stations
Indra headquarters in Madrid, Spain. Photo: Indra [Avionics Today 09-29-2014]...
aviationtoday.com
Republic Of Korea to Procure 40 Lockheed Martin F-35A Lightning II’s
Lockheed Martin’s Lightning II aircraft. Photo: Wikipedia [Avionics Today 09-29-2014]...
aviationtoday.com
Air Force Military Training Center Students Complete Training on Ansat-U
The first group of third-year students at the Syzran campus...
aviationtoday.com
Lockheed Martin CEO Highlights Tech Initiatives in Difficult Times
Lockheed Martin Chairman, President and CEO Marillyn Hewson. Photo: Lockheed...
aviationtoday.com
FAA Statement-Update on Chicago Air Traffic Facility
FAA is working around the clock to continue taking travelers...
faa.gov
FAA Statement-10:45 PM Update on Chicago Air Traffic Facility
FAA is working to safely accommodate flights to and from...
faa.gov
FAA Statement-Update on Chicago Air Traffic Facility
FAA Conducting cleanup and damage assessment. Working closely with airlines...
faa.gov
Updated FAA Statement-Event at Chicago Air Traffic Facility
Travelers are encouraged to contact their airlines for further information...
faa.gov
FAA Statement-Event at Chicago Air Traffic Facility
Air travel may be affected-passengers should check with their airlines....
faa.gov
A380 ‎first aircraft in Etihad Airways’ fleet to display new livery
For the first time, Etihad Airways unveiled its all-new livery...
airbus.com
FAA Grants UAS Exemptions for Movie and TV
FAA action marks first step toward allowing the film and...
faa.gov
Already “at home in the sky” – the A320neo continues Airbus’ single-aisle jetliner leadership
Maintaining its reputation for non-stop innovation, Airbus marked a new...
airbus.com


Privacy Statement - Copyright Information. - Contact Us

comments powered by Disqus

Integrated Publishing, Inc.
9438 US Hwy 19N #311 Port Richey, FL 34668

Phone For Parts Inquiries: (727) 755-3260
Google +