Quantcast Helical Inserts

Order this information in Print

Order this information on CD-ROM

Download in PDF Format

     

Click here to make tpub.com your Home Page

Page Title: Helical Inserts
Back | Up | Next

Click here for a printable version

Google


Web
www.tpub.com

Home


   
Information Categories
.... Administration
Advancement
Aerographer
Automotive
Aviation
Combat
Construction
Diving
Draftsman
Engineering
Electronics
Food and Cooking
Math
Medical
Music
Nuclear Fundamentals
Photography
Religion
USMC
   
Products
  Educational CD-ROM's
Printed Manuals
Downloadable Books
   

 

Share on Google+Share on FacebookShare on LinkedInShare on TwitterShare on DiggShare on Stumble Upon
Back
Installation of Three Piece Eccentric and Level Vial Tube
Up
TM-9-254 Gearcase Transfer M548 M548A1 (
Next
Figure 3-26.  Helical Inserting Tool
TM 9-254 Section V. INSTALLATION OF HELICAL INSERTS AND REMOVAL OF DAMAGED SETSCREWS 3-9. Helical Inserts. a. General.  Helical inserts are used to prevent a hard steel bolt or screw from damaging the threads in softer metal such as aluminum castings. b. Installing Helical Inserts.  Helical inserts are sized according to the diameter and number of threads per inch. Select the appropriate size helical insert and install as follows: NOTE o For a blind hole, the length of insert must be selected to insure that a clearance of one-eighth of an inch exists from the bottom of the hole to tang of the insert. o For a through hole, the length of insert must be selected to insure that the tang of the insert mounts flush with the bottom of the hole. (1) Retract the mandrel of the helical inserting tool (fig. 3-26) and place a helical insert into the chamber with the tang end of the insert toward the chuck. (2) Advance the mandrel until it fully engages the insert tang.  Continue turning the mandrel, advancing the insert into the chuck until the mandrel and insert are flush with the tip of the chuck. (3) Hold  the  inserting  tool  firmly  and  squarely  against  the  work  with  the  insert  alined  with  the  tapped  hole (fig. 3-27). (4) Rotate the handle clockwise at a slow uniform rate until the top coil of the insert is 1/4 to 1/2 turn below the top work surface of the hole. (5) Rotate the handle counterclockwise to remove mandrel from hole. (6) Place  the  punch  end  of  tang  break-off  tool  (2,  fig.  3-28)  into  the  center  of  the  insert,  resting  the  tool squarely on the insert tang. (7) Strike the top of the tool with a sharp blow using a soft-faced hammer to break tang from insert. (8) If needed, use long narrow tweezers to remove the tang from insert hole. c. Extracting  Inserts  (fig.  3-29).    Helical  inserts  must  be  removed  when  they  are  bent,  broken  or  improperly installed.  To remove an insert: (1) Position the blade of the extracting tool into the center of the insert. (2) Tap the top of the extracting tool with a hammer to seat the tool into the insert. 3-26

Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing

Integrated Publishing, Inc.