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countersink

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countersink


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Countersink  \Coun"ter*sink`\  (koun"t[~e]r*s[i^][ng]k`;  277),  v. 
  t.  [imp.  &  p.  p.  {Countersunk}  (-s[u^][ng]k`);  p.  pr  &  vb 
  n.  {Countersinking}.] 
  1.  To  chamfer  or  form  a  depression  around  the  top  of  (a  hole 
  in  wood,  metal,  etc.)  for  the  reception  of  the  head  of  a 
  screw  or  bolt  below  the  surface,  either  wholly  or  in  part 
  as  to  countersink  a  hole  for  a  screw. 
 
  2.  To  cause  to  sink  even  with  or  below  the  surface;  as  to 
  countersink  a  screw  or  bolt  into  woodwork. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Countersink  \Coun"ter*sink`\,  n. 
  1.  An  enlargement  of  the  upper  part  of  a  hole,  forming  a 
  cavity  or  depression  for  receiving  the  head  of  a  screw  or 
  bolt. 
 
  Note:  In  the  United  States  a  flaring  cavity  formed  by 
  chamfering  the  edges  of  a  round  hole  is  called  a 
  countersink,  while  a  cylindrical  flat-bottomed 
  enlargement  of  the  mouth  of  the  hole  is  usually  called 
  {a  conterbore}. 
 
  2.  A  drill  or  cutting  tool  for  countersinking  holes. 
 
  From  WordNet  r  1.6  [wn]: 
 
  countersink 
  n  :  a  bit  for  enlarging  the  upper  part  of  a  hole  [syn:  {counterbore}, 
  {countersink  bit}] 
  v  :  insert  (a  nail  below  the  surface)  [syn:  {set}] 




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