Rebore holes in heavy equipment including excavators, dozers, cranes and scrappers on site: the main purpose of a line-boring tool. A magnetic drill press application can easily repair damaged or warped holes in heavy equipment, making then concentric again.
Secure a work area for boring on site with a line-borer's feed-system. Several manufacturers produce feed systems that can accommodate corded or battery-powered drills, eliminating the need for a specially designed bar drive. American Machine Tools Co. makes several feed systems including the Q88-E and Q150-S systems. The Q88-E system allows for boring holes up to 16 inches apart while the Q150-S can be used to bore holes up to 20 inches apart. York offers a number of feed systems including the 4-14 ET full-functioning feed-carriage system and the 4-14 manual-feed system. Both feed systems can allow 14 inches of cutting tool travel. While the full-function feed carriage offers automatic feed speeds ranging between 0 and 2.5 inches per minute, the manual feed must be adjusted and operated by hand. The full-function model can rapid traverse at a speed of 27 inches per minute.
Set up a bar drive to rotate boring attachments. The drive component is mounted on top of the tool's feed system. American Machine Tools' feeds can accommodate several different drives including the Fein KBM-80 model auto-magnetic drill press and Milwaukee magnetic drill presses. York tools are designed for use with a number of bar drives including a four-speed Fein electric bar drive and a variable two-speed Eibenstock bar drive. The Fein model offers 100, 150, 260 and 420 rotations-per-minute (RPM) speed options. The Eibenstock on the other hand, offers two variable speed settings. One speed adjusts between 30 and 75 RPM while the other speed is adjustable between 95 and 230 RPM.
Follow all safety precautions when using line-boring tools: the rotating bits and attachments can easily injure operators. Loose clothing and long hair must be secured. Wear goggles to protect the eyes from airborne debris. People unfamiliar with proper line-boring tool operating procedures should not attempt to bore holes with these devices.