Does any one make a left handed threading tap and die kit? I had a muffler on a riding lawn mower that came off. The threads on the one stud were stripped so I wanted to take it out and put in another stud. It was ceezed in so bad that I could not even turn it out with a vice grip pliers. If I could have cut left handed threads and put a left handed threaded nut on it I think I could have backed it out with a wratchet. Any one know about this?
-----Original Message----- From: blindhandyman@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of Ray Boyce Sent: Monday, April 02, 2007 3:45 AM To: blindhandyman@yahoogroups.com Subject: [BlindHandyMan] Thread Cutting Hi All Thread Cutting When building or repairing machinery it is often necessary to cut threads by hand, to cut inside threads a tap is used, for outside threads a die is used. There are several different standards for threads, SAE, Metric and British Standard Whitworth are three common examples, for the purpose of this page the SAE standards, will be discussed. SAE threads come in two styles, fine and coarse, this is determined by the number of threads per inch, for example a fine thread 3/8" bolt would have 24 threads per inch, a course thread bolt would have 16 threads per inch. About Taps Top tapered, center plug, bottom bottoming. There are many different styles of taps used in the industry, however the average person tapping by hand need only concern himself with four styles. Taper: Many threads are chamfered at the cutting end making this a very easy tap to start square. Plug: This has fewer chamfered threads and is the most common tap. Bottoming: This type of tap has very little chamfer and is used to cut threads almost to the bottom of a blind hole. Pipe: Used to cut pipe threads Tapping Procedure: Step 1: Select proper size drill, drill hole, then countersink hole entrance to a diameter slightly larger than major diameter of the threads. Step 2: Mount peice to be tapped in a vise so that hole is in a vertical position. Cup your hand over the tap wrench and apply downward pressure as you turn the wrench. Turn two or three turns. Step 3: Remove wrench from tap, check if tap is square in the hole. Replace wrench, apply cutting fluid, using both hands turn tap one-quarter to one-half turn, then back three-quarters of a turn to break the chip. Continue one-half turn in, then back three-quarters. About Dies Split adjustable die and hexagon rethreading die. There are fixed size and split adjustable dies which have a screw to expand the die for a better fit. Hexagon rethreading dies are also available to clean up existing threads. Using a Die: Step 1: Chamfer the end of the stock with a file or grinder, this should be as deep as the thread to be cut. Step 2: Mount the peice in a vise, make sure chamfered side of die is down, this is the side with the markings, hold the die stock with one hand cupped over center, apply downward pressure as you turn die until cut has started. Step 3: Apply cutting fluid, turn die stock with both hands, after each revolution reverse die one-half turn to break the chips. Step 4: After a few threads have been cut check the fit with a nut, adjust die if necessary. Note: If commercial cutting oil is not available substitute animal lard which is often an ingredient of the product. Threads Per Inch And Tap Drill Size Chart Table with 5 columns and 6 rows Size Coarse Drill Fine Drill 1/4" 20 13/64" 28 7/32" 5/16" 18 17/64" 24 9/32" 3/8" 16 5/16" 24 21/64" 7/16" 14 3/8" 20 25/64" 1/2" 13 27/64" 20 29/64" [Non-text portions of this message have been removed] To listen to the show archives go to link http://acbradio.org/handyman.html or ftp://ftp.acbradio.org/acbradio-archives/handyman/ The Pod Cast address for the Blind Handy Man Show is. http://www.acbradio.org/news/xml/podcast.php?pgm=saturday The Pod Cast address for the Cooking In The Dark Show is. http://www.gcast.com/u/cookingindark/main.xml Visit The Blind Handy Man Files Page To Review Contributions From Various List Members At The Following address: http://www.jaws-users.com/handyman/ Visit the new archives page at the following address http://www.mail-archive.com/blindhandyman@yahoogroups.com/ For a complete list of email commands pertaining to the Blind Handy Man list just send a blank message to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/blindhandyman/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/blindhandyman/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
