STOCKED STEP REAMERS
CUTTING OR NON-CUTTING PILOT
LOW COST & PROMPT DELIVERY
HANNIBAL RESPONDS TO MARKET DEMAND FOR MATERIAL SPECIFIC STEP AND PILOT REAMERS
  • 9 types now available in straight, right spiral, and left spiral flute designs
  • Reduce tooling cost and costly setup time by reaming multi-diameter holes in one operation
  • Eliminate problems caused by heavy stock removal - use a step reamer to remove excess material with minor diameter, while setting up the finish diameter to remove adequate stock to obtain size and best finish
  • When alignment is critical, rely on a piloted reamer; the pilot is non-cutting and acts as a guide to ensure alignment of multi-diameter holes
STEP REAMER MODIFICATIONS
  • Modified tool diameter
  • Metric tool diameter
  • Closer tool diameter tolerance
  • End chamfer other than 45ยบ
  • End cutting or corner radius
  • Increased/decreased circular margin
  • Increased/decreased tool diameter back taper
  • Shortened shank or reduced shank diameter
  • Flat(s) or tang on shank
  • Coatings available:
    TITANIUM NITRIDE - TiN
    TITANIUM CARBONITRIDE - TiCN
STEP REAMER SPECIFICATIONS
  • Geometry and carbide grade appropriate for material being machined
  • Carbide tips brazed to tough hardened alloy steel body
  • Polished flutes for easy chip flow
  • Reamer shanks are ground to next smallest shank diameter listed in NAS 897 if tool diameter is within .005" of shank diameter

STEP REAMER TOLERANCES
  • Tool diameter tolerance:
    Major & minor cutting diameter: plus .0003", minus .0000"
    If non-cutting pilot: plus.000", minus.001"
  • Shank diameter tolerance:
    thru 23/32" tool diameter: plus .0000", minus .0010"
    over 23/32" tool diameter: plus .0000", minus .0015"
  • Step or pilot length tolerance: plus .005", minus .005"