MACHINES AND MACHINE TOOLS, namely, COMPUTER NUMERICALLY CONTROLLED (CNC) LATHES AND MACHINING CENTERS; DRILLING EQUIPMENT, NAMELY, ROTARY ROLLER REAMERS USED FOR MAINTAINING WELL BORE GAUGE, TORQUE REDUCTION, REDUCING DOWN HOLE VIBRATION IN DRILL STRING, AND PARTS THEREFOR, DOWN HOLE ROTARY DRILLING EQUIPMENT, NAMELY, EQUIPMENT USED FOR MAINTAINING WELL BORE GAUGE SIZE AND STABILIZING THE DRILL STRING; REAMERS, NAMELY, REAMERS FOR USE IN ROTARY DRILLING OPERATIONS; ROLLER CARTRIDGES, NAMELY, ONE-PIECE SEAL BEARING CARTRIDGES FOR USE IN ROTARY ROLLER REAMERS; RETENTION ARRANGEMENTS, NAMELY, TAPERED SYSTEMS ON UPPER AND LOWER RETENTION CUSPS THAT LOCK THE CARTRIDGE INTO THE REAMER BODY, AND SYSTEMS FOR ROLLER CARTRIDGES, INCLUDING FOR ROLLER CARTRIDGES IN ROTARY ROLLER REAMERS COMPRISED OF UPPER AND LOWER CUSPS, CRUSHING ROLLERS AND A CRUSHING ROLLER PIN