| 摘要 |
A deep hole cutting apparatus has a chip-replaceable guide pad on a cutting head section. With the deep hole cutting apparatus, finish qualities of a cut hole to be formed can be improved and the service life of the guide pad is lengthened. A guide pad (3A) which is slidably brought into contact with the inner circumference of a cutting hole (H) is removably attached with an attaching screw (17b) to a pad attaching recessed section (18) which is formed on the outer circumference of a cutting head section (11). The top portion (P1) of the guide pad (3A) protrudes outward in the diameter direction from a cutting circumference (S) of a cutting blade (outer circumference side cutting blade (2A)).
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