A lot of different equipment is used in construction. Laborers might mix mortar or plaster in big mixers; dig shafts or tunnels using hydraulic and electric boring machines; or use blowtorches, cranes, lasers, or surveying equipment.

Rotary tools of the drill or boring tool type usually use chucks to hold drill bits or boring tool bits. Many types of such tools–hereinafter for short “drills”–permit adjustment of the operating speed of a drive motor within wide limits without changing gearing in the motor.

This equipment consists of a power source, Torque converter, Auger, Cutter etc. The auger and cutter are protected by the torque converter, which ensures smooth and shock free drive. The heavy duty thrust type bearing provided to drive the auger and cutter is capable of exerting a horizontal load to the order of 5 to 50 MT.

The drilling of holes in the guardrail entails the use of complex tools, e.g., electric boring machines. However, particularly in uninhabited regions where there is no electric power, it is cumbersome to use such boring machines.

Zangheri & Boschetti B-39-S line boring 32mm wood drill US $599.00 (0 Bid) End Date: Wednesday Jan-07-2009 7:29:34 PST