I made a thin parting off tool from hacksaw blade. The tool holder was made from 16X16mm black skin mild steel. After cleaning up the material was held on the angle vice at 30 deg and 1mm wide groove was cut.
Two grooves were cut. The blade would be held between grooves.
二本掘るとこんな風になります。この間に刃が入るわけです。
I cut the blade holding part by 1mm.
刃を入れる部分を1mm掘り下げます。
Deep 1mm wide saw cut was made remaining about 1.5mm.
1.5mmほど残して1mmの深い切込みを入れます。これでホルダーは出来上がり。
I made a blade from carbon steel hacksaw blade. The blade was positioned in the holder and tightened in the tool post. The blade was fixed tight enough by the tool post screw. The both sides of the tool blade was ground about 30 deg to fit to the holder.
aI tested the tool with mild steel scrap. It worked well, but the cutting speed would be about the half of HSS. Otherwise the tool blade wore very quickly.