This manual drilling machine includes a manual transmission mechanism, an axial feed mechanism, a guiding mechanism, and a clearance adjustment mechanism. The manual transmission mechanism consists of a spindle, a wrench connected to the upper end of the spindle, and a drill bit and drill bit socket connected to the lower end of the spindle. The axial feed mechanism consists of a handwheel, worm gear, worm wheel, nut, and lead screw. The guiding mechanism consists of a protective housing whose upper end mates with the nut via a cover, and whose lower end connects to the lead screw. The clearance adjustment mechanism consists of an adjusting nut connected to the spindle above the nut, and two flat bearings located on both sides of the upper end of the nut.
The product features good sealing performance, stable operation, low labor intensity, and multiple uses. It can be used as a device for drilling under pressure on pipelines transporting liquids or gases without interrupting the transport process for installing branch pipes.
