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AYTWCDCBSTAHSS Countersink Drill JIS DCBSTASold0pcsHSS Countersink Drill JIS DCBSTA, a JIS-spec countersink drill finishing the hole and countersunk seat in a single operation. Body diameter 6.4~16.5mm, pilot diameter 3.4~9mm, overall length 60~85mm, available in 5 sizes. Works on carbon steel, alloy steel plus aluminum, copper and other non-ferrous metals up to HRC30. Japanese brand, consistent quality. Typical applications: JIS-size countersinks for flat-head screws (the catalog lists it for drilling flat-head screw holes); the pilot hole and the cone-shaped seat are drilled in one pass, with no need to pre-drill and then switch to a countersink cutter. In the same EIKO family: DCBS (screws M3~M8, pilot diameter 3.5~8.5mm) and the JIS counterbore drill DCBTA; DCBSTA follows JIS sizes, so for the same screw its body diameter is smaller and its overall length longer than DCBS (e.g. M6: body diameter 12.5mm, overall length 80mm; DCBS 14mm, 71mm). Which size for an M8 screw? Choose M8: pilot diameter 9mm, body diameter 16.5mm. How do I choose between DCBSTA and DCBS? Compare the countersink diameter on the drawing with the body diameter: for M8, DCBSTA is 16.5mm and DCBS is 18.5mm.
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HSS Countersink Drill JIS DCBSTA
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Countersink

HSS Countersink Drill JIS DCBSTA

HSS Countersink Drill JIS DCBSTA, a JIS-spec countersink drill finishing the hole and countersunk seat in a single operation. Body diameter 6.4~16.5mm, pilot diameter 3.4~9mm, overall length 60~85mm, available in 5 sizes.

Specifications (5 items)

Part No.StandardDia.Major dia.Flute lengthUsable lengthOverall lengthShank dia.Flutes
AYTWCDCBSTAM3_10.5M33.46.410.511.56062
AYTWCDCBSTAM4_11.9M44.58.411.916.16662
AYTWCDCBSTAM5_13.4M55.510.413.419.67682
AYTWCDCBSTAM6_14.9M66.612.514.922.180102
AYTWCDCBSTAM8_17.7M8916.517.724.385122

Specification Range

Diameter3.4~9mm
Large diameter6.4~16.5mm
Flute length10.5~17.7mm
Effective length11.5~24.3mm
Overall length60~85mm
Shank diameter6~12mm

Product Description

HSS Countersink Drill JIS DCBSTA, a JIS-spec countersink drill finishing the hole and countersunk seat in a single operation. Body diameter 6.4~16.5mm, pilot diameter 3.4~9mm, overall length 60~85mm, available in 5 sizes. Works on carbon steel, alloy steel plus aluminum, copper and other non-ferrous metals up to HRC30. Japanese brand, consistent quality. Typical applications: JIS-size countersinks for flat-head screws (the catalog lists it for drilling flat-head screw holes); the pilot hole and the cone-shaped seat are drilled in one pass, with no need to pre-drill and then switch to a countersink cutter. In the same EIKO family: DCBS (screws M3~M8, pilot diameter 3.5~8.5mm) and the JIS counterbore drill DCBTA; DCBSTA follows JIS sizes, so for the same screw its body diameter is smaller and its overall length longer than DCBS (e.g. M6: body diameter 12.5mm, overall length 80mm; DCBS 14mm, 71mm). Which size for an M8 screw? Choose M8: pilot diameter 9mm, body diameter 16.5mm. How do I choose between DCBSTA and DCBS? Compare the countersink diameter on the drawing with the body diameter: for M8, DCBSTA is 16.5mm and DCBS is 18.5mm.

Workpiece Materials & Hardness

  • Steel (P)
  • Non-ferrous metals (N)

Max. workpiece hardness HRC30

Tags

  • Countersink

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