Line boring machine

Dismountable machining apparatus for the precision machining of a workpiece, said apparatus being dismountable and removable, for operation at a variety of different work site locations, said apparatus comprising:

• base means having at least one foot member releasably attachable at a location for the desired machining operation, and further having a holder portion, said holder portion including a central opening having a predetermined central axis and further having attachment means;
• drive housing means, having connecting means releasably interengageable with said attachment means, and defining a through opening in registration with said central opening of said holder portion, whereby said drive housing means may be assembled and disassembled from said base member at a work site;
• drive sleeve means in said drive housing means rotatably mounted therein by suitable bearing means, and incorporating a central bore through said sleeve means;
• drive transmission means operatively connected to said drive sleeve means, and adapted to be coupled to a suitable power source, for driving said drive sleeve means;
• auxiliary drive means, operatively connected to said drive sleeve means, and driven in unison therewith;
• a machining bar member slidably received within said drive sleeve means, and driveably interengageable within said sleeve means, whereby said machining bar member may be rotatably driven by said drive sleeve means, and may be axially slid therein, and being releasable therefrom for shipping to and from a work site;
• feed housing means an a feed sleeve member mounted in said feed housing means and supported by suitable bearing means for rotation therein, said feed sleeve member defining a central bore adapted to receive said machining bar member therein, and fastening means for fixing said machining bar member therein whereby said feed sleeve member rotates therewith in unison;
• a feed connecting member extending to one side of said feed housing means;
• feed screw means operatively connected with said feed connecting member and a feed screw advancing mechanism connected to said feed screw means, and means coupled to said auxiliary drive means whereby said feed screw means may cause axial lengthwise movement of said feed housing means and thus of said machining bar member within said feed sleeve member, and,
• tool bit mounting means adapted to receive a suitable tool bit and releasably fastenable at one end of said machining bar member.