BENCH DRILLER Russian patent published in 2013 - IPC B23B45/00 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly, to drilling machines. Proposed machine comprise bench to support column with drill rod head to be vertically displaced by drive and locked by handle. Drill rod head bosses house two guides of plate supporting head drive motor running in bearings and having bore in its lower part. Bearing assembly has hollow shaft to support drive rod head shaft. Said drive rod head bottom bore corresponds to machine tool Morse taper No 2-No 4. Extra bearing assembly with shaft is mounted on stiff connector fitted on said head. Aforesaid shaft lower extension carries driven multi-groove pulley of belt transmission. Aforesaid shaft lower extension carries driving multi-groove pulley to make jointly with aforesaid driven pulley step-down belt transmission.

EFFECT: drilling 50 mm-dia hole with no lubricant-coolant.

7 dwg