G12912.5

Countersink - 90°
Ordering number: 5973406

Countersink with 1-flute, 90° chamfering angle, maximum diameter 12.50mm with an overall length of 49mm and a head length of 17mm and 8mm straight shank, according to DORMER standard to produce a conical seat for ISO Metric countersunk-head screws, HSS with standard bright finish for machining free machining and plain carbon steel, wrought and copper or copper alloys

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Product Feature

Bright (uncoated)

High Speed Steel Tool Material

Dormer Standards

Right Hand Rotation / Cutting

90° Countersink

Cylindrical Shank / Straight Shank

Product Detail

Description	Value
EAN number	7320760149225
EDP number	0149225
Product name	G12912.5
Ordering code ANSI	G12912.5
Gross weight - grams	27.3
Cutting diameter - millimeter (DC)	12.5 mm
Head length - millimeter (LH)	17 mm
Overall length - millimeter (OAL)	49 mm
Connection diameter - millimeter (DCON MS)	8 mm
Flute count (NOF)	1
ANSI	G12912.5
ISO	G12912.5

Cutting Conditions

P - Steel and cast steel (steels with alloy content ≤ 10% and a hardness of < 45HRC)

P1

P1 - Free machining steel (carbon steels with increased machinability)

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	Suitability	v_c	f
P1.1 - Free machining sulfurized carbon steel with a hardness of < 240HB	help_outline Primary use	69 ft/min	0.0047 inch/rev
P1.2 - Free machining sulfurized and phosphorized carbon steel with a hardness of < 180HB	help_outline Primary use	79 ft/min	0.0047 inch/rev
P1.3 - Free machining sulfurized/phosphorized and leaded carbon steel with a hardness of < 180HB	help_outline Primary use	82 ft/min	0.0047 inch/rev

P2

P2 - Plain carbon steel (steels comprised of mainly iron and carbon)

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	Suitability	v_c	f
P2.1 - Plain low carbon steel containing < 0.25%C with a hardness of < 180HB	help_outline Primary use	59 ft/min	0.0047 inch/rev
P2.2 - Plain medium carbon steel containing < 0.55%C with a hardness of < 240HB	help_outline Primary use	52 ft/min	0.0039 inch/rev
P2.3 - Plain high carbon steel containing > 0.55%C, with a hardness of < 300HB	help_outline Possible use	46 ft/min	0.0024 inch/rev

P3

P3 - Alloy steel (carbon steels with an alloying content ≤ 10%)

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	Suitability	v_c	f
P3.1 - Alloy steel with a hardness of < 180HB	help_outline Primary use	43 ft/min	0.0031 inch/rev
P3.2 - Alloy steel with a hardness of 180 - 260HB	help_outline Possible use	36 ft/min	0.0031 inch/rev

M - Stainless steel (corrosion resistant steels with ≥ 11% chromium content)

M1

M1 - Ferritic stainless steel (straight chromium non-hardenable alloys)

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	Suitability	v_c	f
M1.1 - Stainless steel, ferritic with a hardness of < 160HB	help_outline Possible use	26 ft/min	0.0031 inch/rev
M1.2 - Stainless steel, ferritic with a hardness of 160 - 220HB	help_outline Possible use	20 ft/min	0.0031 inch/rev

M2

M2 - Martensitic stainless steel (straight chromium hardenable alloys)

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	Suitability	v_c	f
M2.1 - Stainless steel, martensitic with a hardness of < 200HB	help_outline Possible use	23 ft/min	0.0031 inch/rev

K - Cast Iron (castings of iron and carbon alloys with > 2% carbon content)

K1

K1 - Gray iron (GG) (iron-carbon castings with a lamellar graphite microstructure)

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	Suitability	v_c	f
K1.1 - Gray iron, ferritic or ferritic-pearlitic with a hardness of < 180HB	help_outline Possible use	59 ft/min	0.0047 inch/rev
K1.2 - Gray iron, ferritic-pearlitic or pearlitic with a hardness of 180 - 240HB	help_outline Possible use	43 ft/min	0.0039 inch/rev

K2

K2 - Malleable iron (GTS/GTW) (heat-treated iron-carbon castings with a graphite-free microstructure)

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	Suitability	v_c	f
K2.1 - Malleable iron, ferritic with a hardness of < 160HB	help_outline Possible use	62 ft/min	0.0024 inch/rev
K2.2 - Malleable iron, ferritic or pearlitic with a hardness of 160 - 200HB	help_outline Possible use	49 ft/min	0.0024 inch/rev

K3

K3 - Ductile iron (GGG) (iron-carbon castings with a nodular graphite microsturcture)

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	Suitability	v_c	f
K3.1 - Ductile (nodular/spheriodal) iron, ferritic with a hardness of < 180HB	help_outline Possible use	52 ft/min	0.0024 inch/rev
K3.2 - Ductile (nodular/spheriodal) iron, ferritic or pearlitic with a hardness of 180 - 220HB	help_outline Possible use	39 ft/min	0.0024 inch/rev

N - Non-ferrous metals (metals including alloys without an appreciable amount of iron)

N1

N1 - Wrought aluminium

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	Suitability	v_c	f
N1.1 - Pure aluminium and wrought aluminium alloys with a hardness of < 60HB	help_outline Primary use	112 ft/min	0.0047 inch/rev
N1.2 - Wrought aluminium alloys with a hardness of 60 - 100HB	help_outline Primary use	82 ft/min	0.0047 inch/rev
N1.3 - Wrought aluminium alloys with a hardness of 100 - 150HB	help_outline Possible use	52 ft/min	0.0039 inch/rev

N2

N2 - Cast aluminium

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	Suitability	v_c	f
N2.1 - Cast aluminium alloys with a hardness of < 75HB	help_outline Possible use	52 ft/min	0.0039 inch/rev
N2.2 - Cast aluminium alloys with a hardness of 75 - 90HB	help_outline Possible use	46 ft/min	0.0039 inch/rev

N3

N3 - Copper or copper alloys

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	Suitability	v_c	f
N3.1 - Free-cutting copper-alloys materials with excellent machining properties	help_outline Primary use	56 ft/min	0.0039 inch/rev
N3.2 - Short-chip copper-alloys with good to moderate machining properties	help_outline Primary use	30 ft/min	0.0039 inch/rev
N3.3 - Electrolytic copper and long-chip copper-alloys with moderate to poor machining properties	help_outline Possible use	16 ft/min	0.0031 inch/rev

N4

N4 - Polymers(synthetic or semi-synthetic materials)

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	Suitability	v_c	f
N4.1 - Thermoplastic polymers	help_outline Possible use	115 ft/min	0.0047 inch/rev
N4.2 - Thermosetting polymers	help_outline Possible use	98 ft/min	0.0047 inch/rev