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Toolhelix›ISO insert code›VBMT 110304

VBMT 110304

What VBMT 110304 means, letter by letter: rhombic 35°, positive, 5° clearance, tolerance M, 40–60° countersunk hole, chipbreaker one side. Inscribed circle 6.35 mm, thickness 3.18 mm, nose radius 0.4 mm.

1 · SHAPERhombic 35°V
2 · CLEARANCE5°B
3 · TOLERANCEClass Mmedium, pressed
4 · TYPET40–60° countersunk hole, chipbreaker one side
5 · SIZE11inscribed Ø 6.35 mm · cutting edge 11.1 mm
6 · THICKNESS3.18 mm03
7 · NOSE RADIUS0.4 mm04
IC 6.35s 3.18clearance 5°rε 0.4
To scale: top view with the inscribed circle (blue dashes) and, on the right, the side view with the thickness. The grey dashes mark the chipbreaker; its real shape is up to the manufacturer.

VBMT 110304 dimensions

Inscribed circle IC6.35 mm
Cutting edge length11.07 mm
Thickness s3.18 mm
Nose radius rε0.4 mm
Corner angle35°
Clearance angle5°
Tolerance MIC ±0.05 · corner height ±0.16 · thickness ±0.13 mm
ANSI equivalent (inch)VBMT 221

What VBMT 110304 tells you on the shop floor

35° corner: reaches into grooves and complex profiles, but the edge is fragile. Light cuts only.

Positive insert (5°): lower cutting forces and less chatter. For finishing, boring, thin-walled parts and lighter machines.

Pressed, medium tolerance: economical, fine for roughing and where you do not need repeatability to a few hundredths of a mm at every insert change.

Small radius: lower forces and chatter, good finish at low feed.

Typical holders for VBMT

For a positive rhombic 35° insert the most common ISO 5608 holders are:

The final R or L means right or left hand. Shank size, length and the exact clamping are in the manufacturer's catalogue.

In inches, with the ANSI designation, the same insert is VBMT 221: size in eighths of an inch, thickness in sixteenths, radius in sixty-fourths. Converting any code, both ways, is in ISO Inserts Pro.

Other VBMT sizes

Same size, other version

Designation to ISO 1832; reference tables: Mitsubishi Materials turning catalogue (insert identification). Holders to ISO 5608. Chipbreaker, grade and cutting data differ between manufacturers: the catalogue of the insert you use is what counts.

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Frequently asked questions

What does VBMT 110304 mean?

VBMT 110304: rhombic 35°, positive, 5° clearance, tolerance M, 40–60° countersunk hole, chipbreaker one side. Inscribed circle 6.35 mm, thickness 3.18 mm, nose radius 0.4 mm.

What is the inscribed circle of VBMT 110304?

6.35 mm, with a 11.1 mm cutting edge.

What is the ANSI equivalent of VBMT 110304?

VBMT 221.

Which holder takes VBMT 110304?

An ISO 5608 holder for positive rhombic 35° inserts, for example SVJBR/L or SVVBN.

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