Deep hole drill

Abstract

A deep hole drill comprising a cutter carrier, a replaceable cutting insert and at least one replaceable guide strip. The cutter carrier is embodied in such a way that it can be used for a predetermined nominal diameter range. In order to adjust the deep hole drill to the various desired nominal diameters in a quicker and more precise manner, a separate kit consisting of a cutting insert and at least one guide strip is associated with each nominal diameter. Fixed stops are provided on the cutter carrier for said kit.

1 . A deep hole drill comprising: 
 a cutter carrier, at least one replaceable cutting insert attached to the cutter carrier, and at least one replaceable guide strip attached to the cutter carrier, the cutter carrier comprising at least one fixed step for the cutting insert and at least one fixed step for the guide strip.    
   
   
       2 . The deep hole drill according to  claim 1 , wherein a through hole for a screw is provided on the cutter insert, the through hole having an offset when the cutter insert rests on the stop for the cutting insert with respect to a corresponding threaded hole on a cutter insert seat on the cutter carrier, so that the cutter insert is pressed against the stop during screwing of the screw through the through hole and into the threaded hole.  
   
   
       3 . The deep hole drill according to  claim 1 , wherein the cutter insert comprises a replaceable plate.  
   
   
       4 . The deep hole drill according to  claim 2 , wherein the stop for the cutter insert is a two-sided stop which comprises two stop surfaces defining the cutter insert seat.  
   
   
       5 . The deep hole drill according to  claim 4 , wherein the two stop surfaces span a first angle smaller than 90° and two counter-stop surfaces of the cutter insert facing the stop surfaces span a second angle, the second angle being larger than the first angle.  
   
   
       6 . The deep hole drill according to  claim 1 , wherein the cutter insert and the guide strip consist of hard metal.  
   
   
       7 . The deep hole drill according to  claim 1 , wherein the cutter insert and the guide strip have a hard material coating.  
   
   
       8 . The deep hole drill according to  claim 1 , wherein the drill is a single-lip deep hole drill with internal cooling.  
   
   
       9 . The deep hole drill according to  claim 1 , wherein the cutter carrier consists of heat-treatable steel.  
   
   
       10 . The deep hole drill according to  claim 1 , wherein the cutter carrier is a drill head which is joined to a drill shank soldered into a clamping sleeve.  
   
   
       11 . The deep hole drill according to  claim 10 , wherein the drill shank consists of an unformed, heat-treated steel tube.  
   
   
       12 . A deep hole drill set comprising a cutter carrier and a plurality of kits, each kit comprising a cutting insert and at least one guide strip for equipping the cutter carrier according to a nominal diameter, each kit being associated with a certain nominal diameter in a nominal diameter range (ΔND), each cutting insert and each guide strip having counter-stop surfaces with which they can be fixed in position at fixed stops on the cutter carrier.  
   
   
       13 . The deep hole drill set according to  claim 12 , wherein the cutting inserts and the guide strips can each be screwed to the cutter carrier, wherein 
 the cutting inserts each have a cutting insert through hole at the same distance from the respective counter-stop surfaces and    the guide strips each have a guide strip through hole which extends between its counter-stop surface and a supporting surface.    
   
   
       14 . The deep hole drill set according to  claim 12 , wherein the distance of the through hole to a minor cutting edge of a cutting insert to the next larger cutting insert increases by a specified amount by which the distance of the counter-stop surface and the supporting surface of the associated guide strip to the next larger guide strip increases.