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
Qatar Airways flies into a new era of travel with delivery of its first A380
World’s flagship aircraft takes Gulf airline to new heights with...
airbus.com
Airbus launches new pivoting overhead carry-on stowage bins for A320 Family with order from Delta Air Lines
A320 Family non-stop cabin innovation: offering passengers the greatest overhead...
airbus.com
Airbus and Zodiac Aerospace launch “Space-Flex v2” cabin option
• Providing A320 Family operators with increased galley capacity while...
airbus.com
Human Space Flight Report Promotes Innovation
September 16The Federal Aviation Administration (FAA) has released a compilation...
faa.gov
US Air Force Expands RQ-4 Global Hawk Fleet
A Northrop Grumman RQ-4 Global Hawk. Photo: Wikipedia [Avionics Today...
aviationtoday.com
Pratt & Whitney, US Air Force Complete Qualification for F135 Engine Testing
Pratt and Whitney F135 engine. Photo: Joint Strike Fighter Program...
aviationtoday.com
Human Factors Students Ready to Keep NextGen Avionics Grounded in Reality
[Avionics Today 09-16-2014] As new aviation technology and capabilities such...
aviationtoday.com
Now 20 years “young,” Airbus’ Beluga airlifters show no signs of slowing down
Twenty years to the day since its maiden flight, the...
airbus.com
Safe and Secure: Honeywell and Inmarsat Tweak IFC for Military Users
[Avionics Today 09-15-2014] Honeywell and Inmarsat are expanding their prior...
aviationtoday.com
NAVAIR Integrates Existing Products into Next Generation UAS Software
Navy flight test pilot demonstrates functionality of new software for...
aviationtoday.com
Mina Group to Supply Jet Fuel for US Department of Defense in Eastern Europe
The Pentagon US Department of Defense building. Photo: Wikipedia [Avionics...
aviationtoday.com
Airbus showcases innovations and passenger comfort at Airline Passenger Experience Association (APEX) 2014 Expo
• Explore the Airbus comfort standard• High-definition video A380, A350...
airbus.com
Beluga celebrates the 20th anniversary of its first flight
Flight hours per aircraft have since doubled and will do...
airbus.com
Airbus to Open Flight Training Center in Monterrey
VivaAerobus selects Airbus as Flight Training provider Share this Read...
airbus.com
CAA Announces Modifications to UK’s Class F Airspace
[Avionics Today 09-12-2014] The U.K.’s Civil Aviation Authority (CAA) has...
aviationtoday.com
Airbus establishes flight operations documentation centre in Bangkok
Subsidiary to produce standard manuals and customisation services Share this...
airbus.com
A Scorpion in DC: Textron AirLand to Showcase Jet in Nation’s Capital
The Textron AirLand Scorpion in flight. Photo: Textron [Avionics Today...
aviationtoday.com
Think ink: Airbus revolutionises how an airline’s livery is applied to jetliners
The application of complex, large-scale liveries on aircraft presents a...
airbus.com
Boeing Delivers Third Peace Eagle Aircraft to Turkey
The Boeing Peace Eagle Early Warning and Control aircraft. Photo:...
aviationtoday.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 +