Explanation of the manual is inadequate and "knack" is necessary for using the machine. Since the explanation of the angle at the time of attaching the drill to be polished to the adapter is not detailed, it is worthwhile to grasp its "knack".
S45C S55C Drilling process before and after induction quenching such as chromoly material. Hole drilling with high diameter drilling diameter of 4.5 to 18.0 Ф. It can be cut well by re-polishing, processing after thinning. Processing accuracy OK.
On 2012-06-11 20:53:28
It seems that thinning is a little impossible for regrinding small diameter drills less than Ф 4.0. Thinning less than Ф 7.0 can be thinned cleanly, but when the heels are sharply scraped together and reset, the rake angle will change. I care about the life span of the whetstone. On the contrary, thinning of the large caliber is the ideal thinning mainly cutting only the chisel point part line. It is well polished and can be cut well.
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