Step Drills
W.L. Fuller W.L. Fuller
  • Step Drills

Step Drills

Fuller Step Drills are designed for making countersinks for round head fasteners. These high speed steel drills have an 82 degree angled step and can drill and countersink in one operation. They cut wood, plastic, and metal.

They are also a time saver as they drill both the root diameter and the shank of a fastener at the same time. A step drill is defined as a multiple diameter drill with one set of drill lands which are ground to different diameters. High speed steel standard step drills can also be used for drilling holes for socket-head screws.

 
 
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Tech Spec Product Info User Generated Content
Part Number  Screw Size  Major Dia.  Minor Dia.  Pilot Length  Flute Length 
SD2  3/16  .090  3/16  1-1/8 
SD3  7/32  .103  3/16  1-1/4 
SD4  15/64  .116  3/16  1-5/16 
SD5  17/64  .129  1/4  1-7/16 
SD6  19/64  .142  1/4  1-9/16 
SD7  21/64  .155  1/4  1-11/16 
SD8  11/32  .168  1/4  1-11/16 
SD9  3/8  .182  1/4  1-13/16 
SD10  10  13/32  .195  1/4  1-15/16 
SD12  12  29/64  .221  5/16  2-1/8 
SD14  14  1/2  .255  5/16  2-1/4 
SD16  16  9/16  .286  5/16  2-1/2 
SD18  5/16  5/8  .317  3/8  2-1/2 
SD20  20  11/16  .328  3/8  2-1/2 
SD24  3/8  3/4  .380  3/8  2-1/2 
Part Number  Overall Length  Shank Size 
SD2  2-3/16  3/16 
SD3  2-3/8  7/32 
SD4  2-7/16  15/64 
SD5  2-5/8  1/4 
SD6  2-3/4  1/4 
SD7  2-15/16  1/4 
SD8  1/4 
SD9  3-1/8  3/8 
SD10  3-5/16  3/8 
SD12  3-9/16  3/8 
SD14  3-3/4  1/2 
SD16  1/2 
SD18  1/2 
SD20  1/2 
SD24  1/2 
BRAND: W.L. Fuller
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