All Category - Combined Core Drill and Counter Bore - Metric Sizes

Metric Sizes

This advanced cutting tool design combines into one operation, instead of two, the preparation of shallow cored holes for insertion of Hubbard (Welch Type) Expansion Plugs.

This cutting tool creates the following features in one operation:
  • Correct counter bore diameter for each specific plug diameter.
  •  Proper width of the bottom of the counter bore – equal to the thickness of the material.
  •  Correct angle between the cylindrical sides and the bottom of the counter bore – 96 degrees.
  •  Includes a chamfer at the top lip of the counter bore at a bore depth of approximately 1-1/2 material thickness. This functions as a lead in for plug insertion and is a nice feature considering the close fit of the bore and the expansion plug.
  • Stout, rigid cutting tool design eliminates chatter and insures the accuracy essential to machining square shouldered, leak-proof holes free of burrs and fillets.
  • Tooling appropriate for both low and high volume production work – T-15 tool steel and C-6 Carbide available.
  • Standard shank sizes that will work in any cutting tool holding system.
  • Cutting tools can be sent back to us for sharpening.
  • Maximizes sealing effectiveness of Hubbard (Welch Type) Expansion Plugs and Ground Plugs.

Item #
Plug Diameter
Plug Material Thickness
Price C-6 Carbide
Price T-15 Tool Steel
Note : click on item number to submit request for quote
CBore-HPM-394-32 100.81$250$170
CBore-HPM-394-62 101.57$250$170
CBore-HPM-472-32 120.81$268$183
CBore-HPM-472-62 121.57$268$183
CBore-HPM-551-32 140.81$276$188
CBore-HPM-551-62 141.57$276$188
CBore-HPM-551-83 142.11$276$188
CBore-HPM-630-32 160.81$288$196
CBore-HPM-630-62 161.57$288$196
CBore-HPM-630-83 162.11$288$196
CBore-HPM-709-32 180.81$294$200
CBore-HPM-709-62 181.57$294$200
CBore-HPM-709-83 182.11$294$200
CBore-HPM-787-32 200.81$301$205
CBore-HPM-787-62 201.57$301$205
CBore-HPM-787-83 202.11$301$205
CBore-HPM-866-32 220.81$309$210
CBore-HPM-866-62 221.57$309$210
CBore-HPM-866-83 222.11$309$210
CBore-HPM-984-32 250.81$360$245
CBore-HPM-984-62 251.57$360$245
CBore-HPM-984-83 252.11$360$245
CBore-HPM-1102-32 280.81$375$255
CBore-HPM-1102-62 281.57$375$255
CBore-HPM-1102-83 282.11$375$255
CBore-HPM-1260-32 320.81$401$273
CBore-HPM-1260-62 321.57$401$273
CBore-HPM-1260-83 322.11$401$273
CBore-HPM-1417-32 360.81$430$293
CBore-HPM-1417-62 361.57$430$293
CBore-HPM-1417-83 362.11$430$293
CBore-HPM-1575-32 400.81$459$313
CBore-HPM-1575-62 401.57$459$313
CBore-HPM-1575-83 402.11$459$313
CBore-HPM-1772-32 450.81$489$333
CBore-HPM-1772-62 451.57$489$333
CBore-HPM-1772-83 452.11$489$333
CBore-HPM-1969-32 500.81$518$353
CBore-HPM-1969-62 501.57$518$353
CBore-HPM-1969-83 502.11$518$353
CBore-HPM-2205-32 560.81$548$373
CBore-HPM-2205-62 561.57$548$373
CBore-HPM-2205-83 562.11$548$373
CBore-HPM-2480-32 630.81$562$383
CBore-HPM-2480-62 631.57$562$383
CBore-HPM-2480-83 632.11$562$383
Total: 46