Reamer Stabilizers
The Model 60 Bit Reamer Stabilizer is used adjacent to the bit during pilot hole drilling. Extremely effective, this reamer stabilizer helps to centre the bit and dresses the pilot hole uniformly to size resulting in reduced wear rate of the rib stabilizers which follow.
Bearing pins for the rollers are made of case hardened alloy steel. The Aero feature directs air to the bearing surfaces for cooling and to keep them free from dust and rock cuttings. At the completion of the pilot hole, the bit and reamer stabilizer are removed from the string by use of the portable Makeup/Breakout tool.
The ability to replace worn parts adds versatility to this design. Following is the replacement sequence for rollers, pins and blocks: a) Remove roll pin from upper bearing blocks with punch. b) Drive bearing pin up into dressing slots with tool. c) Lift roller out of body. To remove blocks from roller pocket place a piece of soft iron or brass against face of part and drive out with soft hammer.
Also available are Type “K” (Knobby) rollers which are for use in all rock formations, and are particularly effective for extremely hard and abrasive conditions. This design features a tungsten carbide compact studded wear surface for maximum life in abrasive environments. The inner bearing surface is carburized, hardened and honed to close tolerance for long life.
