Bar material supporting device for automatic lathe

A bar supporting apparatus for an automatic lathe, the apparatus being gripped by a chuck of a main spindle of said automatic lathe and preventing a rotating bar from oscillating at a rear of said main spindle, comprising:

• a tubular case into which said bar is inserted, along a longitudinal direction;
• a plurality of supports for supporting said bar;
• a fixing member fixed to each support for fixing said supports to said case, each fixing member having an internal surface concaved with a curvature substantially matched with an external surface of said case;
• means for fixing said supports with fixing members to said case;
• said case having a through hole for each support and into which each respective support is inserted, each through hole having a finite axial and circumferential extent for accommodating each support and said supports being fixed into said case for bringing the internal surface of said fixing member into contact with the external surface of said case to fix each fixing member to said case when said supports are inserted into said case through said through holes, and positioning of an internal surface of each support adjacent the bar being performed with the external surface of said case as a reference.