Made in Switzerland by URMA.

This is a used MicroMax Balanceable Micro-Adjustable Fine Boring Head in GREAT condition. Has some slight discoloring but it's simply cosmetic and doesn't affect function whatsoever.

Model #: 05 42 21

Features:

  • The MicroMax™ Boring System allows you to bore precise, round holes, vibration free at recommended cutting speeds. Balancing the boring system allows you to reach these cutting speeds without the usual out of roundness and vibration. Inserts easily shear the material from the bore wall at the appropriate cutting speeds.

  • This is the tool industry’s first boring head with patented micro-adjustable balancing. Fits either Alpha Mount 4 or Beta 40 toolholders and extensions.

  • Vibration free boring at any speed within boring bar’s capability (up to 20,000 RPM).

  • To balance boring head for boring bar offset, simply turn balance ring to match the desired bore diameter.

  • Set bore diameter to .0001” accuracy directly off dial.

  • Boring head has a total of .197” (5) of adjustment; requiring fewer boring bars to cover a larger range.

  • Through-spindle coolant — internal passageways — deliver cutting fluid directly to the cutting area without contaminating adjustment mechanism.

    Specifications:

    Capacity: 5/8"

    Boring Range: .036" to 1.57"

    Head Diameter: 2.307"

    Head Length: 2.637"

    Graduations: .0001"

    Comes as shown in pictures.

    -Ref 206