Page 52 - Carmex - Tiny Tools 2025 (Metric)

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Tiny Tools

Technical Section

Carbide Grades:

BXC (P30 - P50, K25 - K40)
PVD TiN coated grade for low cutting speed.
Works well with a wide range of materials.
BMK (K10 - K20)
Sub-micron grade with advanced PVD triple coating. Extremely high heat
resistant and smooth cutting operation, for high performance, and normal machining conditions.
General purpose for all materials.
K20 (K10 - K30)
Uncoated Carbide grade for non ferrous metals, aluminum and cast iron.
New TNX
New advanced carbide grade TNX for higher feeds and high performance, at medium to high cutting
speed. Extra fine grain size with high hardness and toughness combined with triple layer reddish
coating, provides high edge stability and better chip flow.
Cutting speed for Tiny Tools

ISO Cutting Speed m/min
Stan- Material Condition
dard BXC BMK K20 TNX
<%0.25C Annealed
Non-Alloy steel ≥%0.25C Annealed
and cast steel, < %0.55C Quenched and tempered 25 - 70 30 - 80 36 - 80
free cutting steel ≥%0.55C Annealed
P ≥%0.55C Quenched and tempered
Low alloy steel and cast steel Annealed 20 - 40 25 - 50 30 - 50
(less than %5 alloying elements) Quenched and tempered
High alloy steel, cast steel, and Annealed 20 - 40 25 - 50 30 - 50
tool steel Quenched and tempered
Ferritic/martensitic
M Stainless steel and cast steel Martensitic 25 - 40 30 - 60 36 - 60
Austenitic
Ferritic/pearlitic
Cast iron nodular (GGG) 25 - 60 30 - 80 36 - 80
Pearlitic
K Grey cast iron (GG) Ferritic 30 - 70 30 - 80 36 - 80
Pearlitic
Ferritic
Malleable cast iron 20 - 40 20 - 50 24 - 50
Pearlitic
Not cureable
Aluminum-wrought alloy 50 - 100 60 - 120 30 - 50 72 - 120
Cured
≤%12 Si Not cureable
Aluminum- cast, Cured 40 - 80 50 - 90 20 - 40 60 - 90
alloyed
N >%12 Si High temperature
>%1 Pb Free cutting
Copper alloys Brass 30 - 60 30 - 70 20 - 40 36 - 70
Electrolytic copper
Duroplastics, fiber plastics
Non metalic 40 - 80 20 - 40
Hard rubber
Annealed
Fe based
High temp.alloys, Cured
Super alloys Annealed 15 - 30 15 - 40 18 - 40
S Ni or Co
based Cured
Cast
Titanium, Titanium alloys Alpha+beta alloys cured 10 - 30 10 - 30 12 - 30
Hardened 45-50 HRc
Hardened steel Hardened 51-55 HRc 10 - 30 14 - 40 18 - 40
H Hardened 56-62 HRc
Chilled cast iron Cast 10 - 30 10 - 30 12 - 30
Cast iron Hardened 10 - 20 10 - 20 12 - 20

Recommended Feed Rate: 0.01 - 0.03 mm/rev
For CMR Tiny Tools see page 54

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