Quantcast Types of common taps

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Custom Search
 
  
Figure 1-38.-Types of common taps. Plug hand taps have a chamfer length of 3 to 5 threads and are designed for use after the taper tap. Bottoming hand taps are used for threading the bottom of a blind hole. They have a very short chamfer length of only 1 to 1 1/2 threads for this purpose. This tap is always used after the plug tap has been used. Both the taper and plug taps should precede the use of the bottoming hand tap. Pipe taps are used for pipe fittings and other places where extremely tight fits are necessary. The tap diameter, from end to end of the threaded portion, increases at the rate of 3/4 inch per foot. All the threads on this tap do the cutting, as compared to the straight taps, where only the nonchamfered portion does the cutting. Dies are made in several different shapes and are of the solid or adjustable type. The square pipe die (fig. 1-39) will cut American Standard Pipe thread Figure 1-39.-Types of solid dies. only. It comes in a variety of sizes for cutting threads on pipe with diameters of 1/8 inch to 2 inches. A rethreading die (fig. 1-39) is used principally for dressing over bruised or rusty threads on screws or bolts. It is available in a variety of sizes for rethreading American Standard Coarse and Fine threads. These dies are usually hexagon in shape and can be turned with a socket, box, open-end, or any wrench that will fit. Rethreading dies are available in sets of 6, 10, 14, and 28 assorted sizes in a case. Round split adjustable dies (fig. 1-40) are called “Burton” dies and can be used in either hand diestocks or machine holders. The adjustment in the screw adjusting type is made by a fine-pitch screw, which forces the sides of the die apart or allows them to spring together. The adjustment in the open adjusting type is made by means of three screws in the holder, one for expanding and two for compressing the dies. Two piece collet dies (fig. 1-40) are used with a collet cap (fig. 1-41) and collet guide. The die halves are placed in the cap slot and are held in place by the guide, which screws into the underside of the cap. The die is adjusted by setscrews at both ends of the interval slot. This type of adjustable die is issued in various sizes to cover the cutting ranges of American Standard Coarse and Fine and special-form threads. Diestocks to hold the dies come in three different sizes. Two-piece rectangular pipe dies (fig. 1-40) are available to cut American Standard Pipe threads. They are held in ordinary or ratchet-type diestocks (fig. 1-42). Threading sets are available in many different combinations of taps and dies, together with diestocks, tap wrenches, guides, and necessary screwdrivers and 1-24



Aviation News
Aircraft Asset Assessment B737-800
Market Presence. In the context of re-engining from both manufacturers,...
aviationtoday.com
FAA to Airlines: E-cigs in Checked Bags are Fire Risk
January 23As the popularity of e-cigarettes increases, the FAA wants...
faa.gov
FAA to Issue New Guidance on Sleep Apnea
January 23The Federal Aviation Administration (FAA) continually works with the...
faa.gov
FAA Grants Two More UAS Exemptions
January 23-The Federal Aviation Administration continues to allow expanded commercial...
faa.gov
F/A-18 Super Hornet Infrared Search and Track System Approved for Production
IRST21, shown on the F/A-18E/F. Photo: Lockheed Martin   [Avionics...
aviationtoday.com
Exelis Inks Contract with General Atomics for MQ-9 UAS Ejector Rack
MQ-9 UAS. Photo: U.S. Air Force [Avionics Today 01-22-2015] Exelis...
aviationtoday.com
Boeing Ready to Show Off New Maritime Surveillance Aircraft
Boeing Maritime Surveillance Aircraft (MSA) test flight take off. Photo:...
aviationtoday.com
Lockheed Martin Delivers eCASS System to Troubleshoot U.S. Navy Aircraft
Marine using eCASS system. Photo: Lockheed Martin [Avionics Today 01-22-2015]...
aviationtoday.com
Japan Ministry of Defense Selects Northrop Grumman Aircraft to Up ISR
The Northrop Grumman RQ-4 Global Hawk. Photo: Northrop Grumman  [Avionics...
aviationtoday.com
NATS Reports CO2 Reduction Saves Millions
Flosys, a tool that analyzes the environmental efficiency of flights,...
aviationtoday.com
Airbus’ focus on “thermoplastic” composite materials brings environmental and production improvements
While the use of carbon-fibre reinforced plastic (CFRP) has become...
airbus.com
ATAC Deploys Warfighters to Jacksonville for US Military Training
ATAC Aircraft. Photo: ATAC [Avionics Today 01-16-2015] Airborne Tactical Advantage...
aviationtoday.com
DAC Inks Distribution Deal with Mid-Continent Instruments and Avionics
Photo: DAC International [Avionics Today 01-15-2015] DAC International has reached...
aviationtoday.com
Engility Awarded Contract to Support the FAA’s NextGen Efforts
Photo: Engility Corporation Facebook [Avionics Today 01-15-2015] Engility Holdings has...
aviationtoday.com
LATAM Civil Aviation Entity Purchases VSAT Mesh Solution From Advantech Wireless
Advantech Discovery series VSAT hub. Photo: Advantech [Avionics Today 01-14-2015]...
aviationtoday.com
Airbus in 2014 and beyond: “Delivering on commitments, preparing the future”
Airbus has set its sights on another busy year of...
airbus.com
New Airbus aircraft list prices for 2015
Price adjustment for Airbus’ modern, comprehensive and fuel-efficient aircraft Family...
airbus.com
Airbus launches A321neo with true transatlantic capability
ALC first to commit to Airbus’ increased range option Share...
airbus.com
Airbus exceeds targets in 2014 and prepares for the future
Incremental innovation rewarded by A320neo & A330neo market successHighest number...
airbus.com
DOD Restructures F-35 European Facilities, Streamlines Operations
The F-35 Joint Strike Fighter in flight. Photo: Cherie Cullen...
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 +