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A2 Starrett Hole Saw Arbor, 1/2" Chuck, Fits Hole Saws 1-1/4"-8-9/32" (32-210mm)
 
A2 Starrett Hole Saw Arbor, 1/2" Chuck, Fits Hole Saws 1-1/4"-8-9/32" (32-210mm)
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    A2
    Starrett Hole Saw Arbor

    Four standard arbor designs are available . Each is furnished with a choice of a 1/4" pilot drill of either a conventional high speed steel design or a high performance carbide tipped drill . A set screw in the body allows for easy replacement of the pilot drill . Quick-Hitch ™ arbors enable instant change outs of hole saws without additional tools and without removing the arbor from the chuck .
    When using carbide grit or diamond grit saws, choose carbide tipped pilot drills, which are
    specified by the prefix 'X' in the catalog number.

    Hole Saw Arbor with High Speed Steel/Carbide Drill
    for All-Purpose and Sheet Metal Hole Saws
    Catalog No.
    Fits Hole Saw Diameter Inch/mm
    Shank Size(Inch/mm)
    Screw
    Thread
    Fits Morse
    Taper Adaptor
    A1 (3/8" Chuck)
    9/16" – 1-3/16"
    (14-30 mm)
    11/32" (8 .75mm) Hex
    1/2-20
    MAO5,
    MAO6
    A4 (1/4" Chuck)
    1/4" (6 .5mm) Hex
    A2 Quick-Hitch ™ (1/2" Chuck)
    1-1/4" – 8-9/32"
    (32 - 210 mm)
    7/16" (11mm) Hex
    5/8-18
    MAO2,
    MAO3
    A10 Quick-Hitch ™ (3/8" Chuck)
    11/32" (8 .75mm) Hex
    MAO5,
    MAO6
    Hole Saw Arbor with High Speed Steel/Carbide Drill
    for CT, XO & DO Special Purpose Hole Saws
    XA1 (3/8" Chuck)
    9/16" – 1-3/16"
    (14-30 mm)
    11/32" (8 .75mm) Hex
    1/2-20
    MAO5,
    MAO6
    XA2 Quick-Hitch ™ (1/2" Chuck)
    1-1/4" – 8-9/32"
    (32 - 210 mm)
    7/16" (11mm) Hex
    5/8-18
    MAO2,
    MAO3
    XA10 Quick-Hitch ™ (3/8" Chuck)
    11/32" (8 .75mm) He
    MAO5,
    MAO6
    Hole Saw Arbor With Extended Length HSS Pilot Drill
    A1-E (3/8" Chuck)
    9/16" – 1-3/16"
    (14mm – 30mm)
    11/32" (8 .75mm) Hex
    1/2"-20
     
    A4-E (1/4" Chuck)
    9/16" – 1-3/16
    (14mm – 30mm)
    1/4"-20 (6 .5mm)
    Round
     
    A2-E (1/2" Chuck)
    Quick-Hitch ™
    1-1/4" – 8-9/32"
    (32mm – 210mm)
    7/16" (11mm) Hex
    5/8"-18
     
    A10-E (3/8" Chuck)
    Quick-Hitch
    1-1/4" – 8-9/32"
    932mm – 210mm)
    11/32" (8 .75mm) Hex
     
    Heavy Duty Locking Arbors With High Speed Steel/Carbide Drill  
    A17-38 (3/8" Chuck)
    1-1/2" – 8-9/32"
    (38mm – 210mm)
    11/32" (8 .75mm) Hex
    5/8"-18
     
    A17-12 (1/2" Chuck)
    7/16" (11mm) Hex
     
    XA17-38 (3/8" Chuck)
    1-1/2" – 8-9/32"
    (38mm – 210mm)
    11/32" (8 .75mm) Hex
     
    Locking Arbor With Extended Length HSS Pilot Drill  
    A17-38E (3/8" Chuck)
    1-1/4" – 6-1/4"
    (32mm – 159mm)
    11/32" (8 .75mm) Hex
    5/8"-18
     
    “Oops” Arbor  
    Cat . No .
    Regular Arbor That Fits Outer Hole Saw and Size of Enlarging Diameter
    Pilot Hole Saw Diameter
    that Fits A19 Arbor
       
    A19
    A1
    13/16" - 1-3/16"
    (21mm - 30mm)
    9/16" - 5-1/2"
    (14mm - 140mm) Minimum
    Hole Enlargement is 3/16"
    (4 .7mm) Between Pilot Hole
    Saw and Cutting Saw Diameter
       
    A2 or A10
    1-1/4" - 6"
    (32mm - 152mm)