GMI: Cylindrical bores, diameters 3.70 mm to 21.00 mm

Through hole; diameters 3.70 – 6.00 mm
Blind hole; diameters 6.00 – 21.00 mm

• Can be used up to tolerance class IT8
• Suitable for all metal materials up to a tensile strength of 1400 N/mm² and a maximum hardness of HRC ≤ 45
• Can achieve a surface quality of Rz < 1 μm (R_a ≤ 0.1 μm)
• Application ideal for sliding headstock lathes, but also on CNC controlled turning, drilling or milling machines, machining centers or conventional machine tools 
• Machining in pushing motion with clockwise rotation
• Available with straight shank
• Parameter recommendation:
  • ​​​​​​​Max rotary speed: up to 250 m/min
  • Feed: 0.05–0.3 mm/rev per roller

• Compact design for applications in machines with limited workspace
• Short cycle time
• Diameter adjustment is easy and repeatable
• Requires minimal lubrication (oil or emulsion)
• Tool automatically contracts upon retraction, preventing damage to the roller burnished surface 
• Wear parts are easy to exchange