| 摘要 |
PROBLEM TO BE SOLVED: To provide a reamer able to stably and precisely use for hole finishing work etc., for a long period of time. SOLUTION: This reamer is furnished with a reamer main body 1 having a plurality number of grooves 4 for chip recesses extending in the reamer shaft center L direction on a head end part and an abrasive grain part 2 constituted with abrasive grains attached between the adjacent grooves 4, 4 for the chip recesses of this reamer main body 1. A cutting oil supply hole 5 to supply cutting oil to the grooves 4 for the chip recesses is provided on the reamer main body 1. An oil reservoir recessed part 8 is provided on the abrasive grain part 2. The oil reservoir recessed part 8 and the cutting oil supply hole 5 are connected to each other through a communicating hole 9, and the cutting oil is ejected from this oil reservoir recessed part 8 and the chips are pushed out to the grooves 4 for the chip recesses.
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