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Types and Uses - Continued - 14256_239
Chapter 40 Benders

Tools And Their Uses - Hand tools and what they are used for
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TM 9-243 USING  A  SOLID  STRAIGHT  -  HOLE  REAMER  -  Continued 4 Turn the wrench clockwise with a  steady, firm pres- 5 Remove the reamer from the hole by turning the sure until the reamer has been turned in the hole. wrench clockwise and raising the reamer at the When reaming steel, use cutting oil or machine oil to same time. lubricate the tool. When reaming soft iron, do not lubricate the tool. Turning the wrench too fast or too slowly will cause the reamer to chatter, producing an unevenly reamed hole. CARE  OF  REAMERS 1. 2. 3. 4 Keep  reamers  absolutely  clean  to  do  accurate  work. Do not use the reamer to remove more than 0.002 to 0.003 inches of metal. If the hole is too small, enlarge it with a drill before reaming it. If the proper pressure is applied in use and the reamer  chatters,  replace  it  to  insure  accurate  work. If  the  reamer  edges  are  only  slightly  dulled,  honing the edges on an oilstone may restore the sharp- ness.  On  an  adjustable  reamer,  the  blades  may  be replaced. 5. 6. 7. To  prevent  chipping  or  dulling  the  reamer  when  you are reaming a hole, turn the reamer in the cutting direction  only. To prevent damage to the reamer for short-term storage, wrap it in an oily cloth and keep it in a box. For  long-term  storage,  clean  reamer  thoroughly  and coat with rust-preventive compound. Wrap each reamer separately in oiled cloth and store in a dry, safe place. 39-4







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