Quantcast Figure 1-24.Twist drill nomenclature.

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
The principal parts of a twist drill are the body, the shank, and the point (fig. 1-24). The dead center of a drill is the sharp edge at the extreme tip end of the drill. It is formed by the intersection of the cone-shaped surfaces of the point and should always be the exact center of the axis of the drill. The point of the drill should not be confused with the dead center. The point is the entire cone-shaped surface at the end of the drill. The lip or cutting edge of a drill is that part of the point that actually cuts away the metal when drilling a hole. It is ordinarily as sharp as the edge of a knife. There is a cutting edge for each flute of the drill. The  shank  is  the  part  of  the  drill  that  fits  into  the socket,  spindle,  or  chuck  of  the  drill  press.  Several types exist (fig. 1-25). The  maintenance  of  twist  drills  and  more  about how to use them on specific jobs are discussed later. REVIEW QUESTIONS Q7. Identify the different types of metal-cutting tools. Q8. What are hawks-bill snips used for? Q9. What are hacksaws used for? Q10. What are taps and dies used for? WRENCHES LEARNING   OBJECTIVES:   Identify   the different types of wrenches. Describe the uses of different types of wrenches. List the safety precautions that apply to wrenches. A  wrench  is  a  basic  tool  that  is  used  to  exert  a twisting force on bolt heads, nuts, studs, and pipes. The special  wrenches  designed  to  do  certain  jobs  are,  in most  cases,  variations  of  the  basic  wrenches  that  are described in this section. The best wrenches are made of chrome vanadium steel.  Wrenches  made  of  this  material  are  lightweight and almost unbreakable. This is an expensive material, however,  so  the  most  common  wrenches  found  in  the Navy are made of forged carbon steel or molybdenum steel.  These  latter  materials  make  good  wrenches,  but they  are  generally  built  a  little  heavier  and  bulkier  to achieve   the   same   degree   of   strength   as   chrome vanadium steel. 1-18 Figure 1-24.—Twist drill nomenclature. Figure 1-25.—Representative shanks.



Aviation News
FAA Statement-Update on Chicago Air Traffic Facility
FAA controllers managed more operations at Chicago O'Hare yesterday than...
faa.gov
Got Weather? Helps GA Pilots Prepare for Icing
October 1The Got Weather? campaign aims to help general aviation...
faa.gov
New Methodology Looks to Reduce Aviation Emissions
REACT4C modeling chain set to reduce emissions. Photo: Eurocontrol [Avionics...
aviationtoday.com
Airbus Zephyr Proves Value For Civil Operations in Middle East
[Avionics Today 10-01-2014] The solar-powered Zephyr Unmanned Aircraft System (UAS)...
aviationtoday.com
Military Avionics R&D: Spending Dips But Opportunities Soar
Recently, the U.S. military is focusing more avionics Research and...
aviationtoday.com
US Army Orders $27 Million in Small UAS Spare Parts from AeroVironment
Army launching the Puma UAS. Photo: AeroVironment [Avionics Today 10-01-2014]...
aviationtoday.com
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
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
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
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


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 +