Think & Tinker, Ltd.
CNC router bits and carbide cutting tools with tutorials and technical guides
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Part Numbering Protocol

PreciseBits part numbers consist of 12 alphanumeric digits. They are arranged as

ABCD-XXXX-YYYE

where:
Position Label Description
A Tool Type

D = Drill bit
M = End-mill (milling cutter)
R = Router bit
S = Scoring tool
T = Thread cutter

B Flute Style

Soft Media
1 = 1 flute
2 = 2 flute
3 = 3 flute
4 = 4 flute
5
= 5 flute

Non-ferrous Metals
6 = 1 flute
7 = 2 flute
8 = 3 flute
9 = 4 flute
10
= 5 flute

Ferrous Metals
P = 1 flute
Q = 2 flute
R = 3 flute
S = 4 flute
C Tool Application

D = Steel Rule Die
E = Engraving
F = Fret Cutter
H = Ivory/Horn
I = Inlay (UltraBit)
P = 3D Profiling
S = Shell Cutter
0 (zero) = PreciseBIT

D Shank Diameter

8 = 1/8 in.
4 = 1/4 in.
2 = 1/2 in.

XXXX Cutter Diameter

Decimal inches e.g. 1/32 in. = .0313

YYY Flute Length
or Tip Angle

Effective Flute Length (EFL) in tengths of an inch.  e.g. 1 1/4" = .125
Tip angle (in degrees) e.g. 30° = 030, 60° = 060, 90° = 090

E Point Style

B = Ball nose
F
= Fish-tail
D = Drill point
M = Mill
V = "V" point
Y = "Y" point