Countersink Modeling and Selectable Sizes

Modeling Rules for Countersunk Holes

When a conical shape element is detected, it will be identified as a countersink.
Modeling Rules Example
Model the angle of the conical shape to be 90°. The ratio between the outer hole diameter (D) and inner hole diameter (d) must be as follows: If d ≤ 4.0 mm, the ratio must be above 1.4, If d > 4.0 mm, the ratio must be above 1.7. Example

Countersunk Hole Identification

The countersunk hole is recognized through two steps below.

STEP1

  • The pilot hole diameters for countersunk holes for each CAD package are registered in the meviy hole information database. Detected hole diameters will be checked against this during modeling (see table below).

Countersunk Hole Nominal Diameter File Extension
STEP (.step / .stp) Parasolid (.x_t/.x_b/.xmt /.xmt_txt) ACIS (.sat/.sab) JT (.jt) PRC (.prc) I-deas (.arc/.unv) Autodesk Inventor (.ipt) CATIA V5 (.CATPart) Siemens PLM-NX (.prt) *1 Creo (.neu/.prt/.xpr) Solid Edge (.par/.pwd) iCAD SX (.icd) SOLIDWORKS (.sldprt) Siemens PLM-NX (.prt) *2
M3 3.20 3.30 3.40 3.58 3.6 4.00 3.20 3.30 3.40
M4 4.30 4.40 4.50 4.60 4.68 4.80 4.30 4.40 4.50
M5 5.30 5.50 5.80 6.00 6.18 6.50 5.30 5.50 5.50
M6 6.40 6.60 6.82 7.00 – – 6.40 6.60 6.60
M8 8.40 8.54 9.00 9.22 10.00 – 8.40 8.54 9.00
M10 10.50 10.62 11.00 11.27 12.00 – 10.50 10.62 11.00
M12 13.00 13.50 14.50 － － － 13.00 － 13.50
M14 15.00 15.50 16.50 － － － － － －
M16 17.00 17.50 18.50 － － － 17.00 － 17.50
  • *1 Pilot hole diameter for Siemens PLM-NX JIS model
  • *2 Pilot hole diameter for Siemens PLM-NX ISO model

STEP2

Once the countersunk hole is recognized according to the aforementioned modeling rules, the nominal diameter is determined according to the pilot hole diameter range. (Table below)

If the detected hole diameter does not match any of the entries on the list of pilot hole diameters, the hole is treated as a through hole (or tapped hole).

However, you can change the hole type or hole diameter when configuring the quote settings.

Countersunk diameter Pilot hole(d) range Example
M3 3.2≦d≦4.0 Example
M4 4.3≦d≦4.8
M5 5.3≦d≦6.5
M6 6.3≦d≦7.0
M8 8.4≦d≦10.0
M10 10.5≦d≦12.0
M12 13.0≦d≦14.5
M14 15.0≦d≦16.5
M16 17.0≦d≦18.5

Countersunk Hole Size Selection

  • Available sizes vary depending on material and plate thickness. See the table below for details.
  • Countersunk holes cannot be selected for perforated metals or shim plate materials (SPCC [for shims] or SUS304(H) [for shims]).
Material Plate Thickness Countersunk Hole Bolt Nominal Diameter
  • EN 1.0330 equiv.
  • EN 1.0320 equiv. (hot coiled)
  • EN 1.0038 equiv.
  • EN 1.0330 equiv. (Electrolytic Zinc Plating)
 2.0 M3
2.3 M3
3.2 M3 M4 M5
4.5 M3 M4 M5 M6
6.0 M3 M4 M5 M6 M8 M10
9.0 M5 M6 M8 M10
10.0 M5 M6 M8 M10 M12 M14 M16
12.0 M5 M6 M8 M10 M12 M14 M16
16.0 M5 M6 M8 M10 M12 M14 M16
  • EN 1.4301 equiv.(No.1)
  • EN 1.4301 equiv.(2B)
  • EN 1.4301 equiv. (single-sided #400-grit polished)
  • EN 1.4301 equiv.(single-sided hairline finish)
  • EN 1.4016 equiv.(2B)
  • EN AW−5052 equiv.
 2.0 M3
2.5 M3
3.0 M3 M4 M5
4.0 M3 M4 M5 M6
5.0 M3 M4 M5 M6 M8
6.0 M3 (*1) M4 M5 M6 M8
9.0 M5 M6 M8 M10 M12 M14 M16
10.0 M5 M6 M8 M10 M12 M14 M16
12.0 M5 M6 M8 M10 M12 M14 M16
PET Acrylic Polycarbonate PVC 3.0 M3 M4 M5
5.0 M3 M4 M5 M6 M8
8.0 (*2) M3 M4 M5 M6 M8 M10
10.0 (*3) M3 M4 M5 M6 M8 M10
  • *1 Only available for A5052 Aluminum Alloy.
  • *2 Only available in PET & Acrylic
  • *3 Only available in Acrylic

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