Zagar is offering a range of Precihole BTA deep hole drilling machines. BTA Drilling, also known as STS (Single Tube System) drilling, provides holemaking in the (ID) range of 1.00” - 12. 00” solid drilling, and 16.00” counter-boring with lengths of up to 40’. The BTA process drills holes into the center of cylindrical parts, achieving high concentricity by rotating the cutting tool and feeding it into a counter-rotating part. The cutting tool is designed with carbide inserts and guide pads mounted to a toolholder drill tube and coolant is introduced at high pressure around the drill tube. This design allows the chips to be evacuated through the center of the drill and helps provide precise cutting efficiency. The coolant is then cleaned, cooled and recycled for maximum utilization. Zagar/Precihole offers four modelswith spindle power of 22, 37, 71 and 115 kW.Allmachines are availablewith either FANUC or Siemens CNC controls. Also available are more economical BTA machines that hold the part stationary and feed the cutting tool. These are for applicationswhere a high degree of concentricity is not required. These BTA machines are designed for major parts production in industries such as defense, oil and gas, hydraulics, automotive, general engineering, heavy engineering, power generation, nuclear energy, steel manufacturing and off the road vehicles. For more information contact: Zagar Inc. 24000 Lakeland Boulevard Cleveland, OH 44132 216-731-0500 www.zagar.com