1785NRM20

1785NR Non-Relieved Style Tap
Ordering number: 6008713

Spiral point tap with a 3-6xP second lead, for ISO-Metric thread M20 with 2.50 mm pitch and 6H class of fit with D7 pitch diameter limits, dimensions according to ANSI standard with 0.4890" shank and 0.4890" square drive, HSS with bright finish for 2.5xD through hole threading in general purpose applications

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Product Feature

Bright (uncoated)

Thread Form, Metric Coarse

ANSI – Tap Standards

DIN Thread Pitch Diameter Tolerance Zone (high basic pitch diameter)

2.5×D Usable Tool Depth to Diameter Ratio

High Speed Steel Tool Material

Spiral Point Geometry

Right Hand Rotation / Cutting

Product Detail

Description	Value
Product name	1785NRM20
EDP number	1012909
EAN number	698464124488
Thread diameter size (TDZ)	20
Thread pitch - millimeter (TP)	2.5 mm
Overall length - millimeter (OAL)	113.51 mm
Overall length - inch (OAL)	4.4688 inch
Overall length - fractional inch (OAL)	4.15/32
Threading length - millimeter (THL)	50.8 mm
Threading length - inch (THL)	2 inch
Threading length - fractional inch (THL)	2"
Connection diameter - inch (DCON MS)	0.489 inch
Connection diameter - millimeter (DCON MS)	12.42 mm
Flute count (NOF)	3
Tolerance limit	D7
Clamping width - fractional inch (WSC)	11/16
Clamping width - inch (WSC)	0.489 inch
Clamping width - millimeter (WSC)	12.42 mm
Clamping Length - fractional inch (LCS)	11/16
Clamping Length - inch (LCS)	0.652 inch
Clamping Length - millimeter (LSC)	16.56 mm
Gross weight - grams	172
ANSI	1785NRM20
ISO	1785NRM20
Ordering code ANSI	1785NRM20

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
P1.1 - Free machining sulfurized carbon steel with a hardness of < 240HB	help_outline Possible use	62 ft/min
P1.2 - Free machining sulfurized and phosphorized carbon steel with a hardness of < 180HB	help_outline Possible use	69 ft/min
P1.3 - Free machining sulfurized/phosphorized and leaded carbon steel with a hardness of < 180HB	help_outline Possible use	72 ft/min

P2

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

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	Suitability	v_c
P2.1 - Plain low carbon steel containing < 0.25%C with a hardness of < 180HB	help_outline Possible use	52 ft/min
P2.2 - Plain medium carbon steel containing < 0.55%C with a hardness of < 240HB	help_outline Possible use	46 ft/min
P2.3 - Plain high carbon steel containing > 0.55%C, with a hardness of < 300HB	help_outline Possible use	39 ft/min

P3

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

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	Suitability	v_c
P3.1 - Alloy steel with a hardness of < 180HB	help_outline Possible use	23 ft/min
P3.2 - Alloy steel with a hardness of 180 - 260HB	help_outline Possible use	20 ft/min
P3.3 - Alloy steel with a hardness of 260 - 360HB	help_outline Possible use	16 ft/min

P4

P4 - Tool steel (special alloy steel for tools, dies and molds)

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	Suitability	v_c
P4.1 - Tool steel with a hardness of < 26HRC	help_outline Possible use	13 ft/min
P4.2 - Tool steel with a hardness of 26 - 39RC	help_outline Possible use	13 ft/min
P4.3 - Tool steel with a hardness of 39 - 45HRC	help_outline Possible use	10 ft/min

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
M1.2 - Stainless steel, ferritic with a hardness of 160 - 220HB	help_outline Possible use	23 ft/min

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
M2.2 - Stainless steel, martensitic with a hardness of 200 - 280HB	help_outline Possible use	20 ft/min

M3

M3 - Austenitic stainless steel (chromium-nickel and chromium-nickel-manganese alloys)

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	Suitability	v_c
M3.1 - Stainless steel, austenitic with a hardness of < 200HB	help_outline Possible use	16 ft/min
M3.2 - Stainless steel, austenitic with a hardness of 200 - 260HB	help_outline Possible use	13 ft/min
M3.3 - Stainless steel, austenitic with a hardness of 260 - 300HB	help_outline Possible use	13 ft/min

M4

M4 - Super-austenitic, Duplex or Precipitation Hardening stainless steel (austenitic alloys with > 20% Ni, austenitic-ferritic microstructure or precipitation hardened)

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	Suitability	v_c	f
M4.1 - Stainless steel, austenitic-ferritic or super-austenitic with a hardness of < 300HB	help_outline Possible use	10 ft/min

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
K1.1 - Gray iron, ferritic or ferritic-pearlitic with a hardness of < 180HB	help_outline Possible use	46 ft/min
K1.2 - Gray iron, ferritic-pearlitic or pearlitic with a hardness of 180 - 240HB	help_outline Possible use	33 ft/min
K1.3 - Gray iron, pearlitic with a hardness of 240 - 280HB	help_outline Possible use	26 ft/min

K2

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

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	Suitability	v_c
K2.1 - Malleable iron, ferritic with a hardness of < 160HB	help_outline Possible use	33 ft/min
K2.2 - Malleable iron, ferritic or pearlitic with a hardness of 160 - 200HB	help_outline Possible use	26 ft/min
K2.3 - Malleable iron, pearlitic with a hardness of 200 - 240HB	help_outline Possible use	20 ft/min

K3

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

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	Suitability	v_c
K3.1 - Ductile (nodular/spheriodal) iron, ferritic with a hardness of < 180HB	help_outline Possible use	30 ft/min
K3.2 - Ductile (nodular/spheriodal) iron, ferritic or pearlitic with a hardness of 180 - 220HB	help_outline Possible use	23 ft/min
K3.3 - Ductile (nodular/spheriodal) iron, pearlitic with a hardness of 220 - 260HB	help_outline Possible use	16 ft/min

K4

K4 - Austenitic or austempered ductile iron (Ni-Resist/ADI) (iron-carbon alloy castings with an austenitic or ausferrite microstructure)

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	Suitability	v_c
K4.1 - Austenitic cast iron with a hardness of < 180HB	help_outline Possible use	26 ft/min
K4.2 - Austenitic cast iron with a hardness of 180 - 240HB	help_outline Possible use	20 ft/min
K4.3 - Austempered ductile iron with a hardness of 240 - 280HB	help_outline Possible use	13 ft/min
K4.4 - Austempered ductile iron with a hardness of 280 - 320HB	help_outline Possible use	13 ft/min
K4.5 - Austempered ductile iron with a hardness of 320 - 360HB	help_outline Possible use	10 ft/min

K5

K5 - Compacted graphite iron (CGI) (iron-carbon castings with a vermicular graphite structure)

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	Suitability	v_c
K5.1 - Vermicular, compacted graphite iron with a hardness of < 180HB	help_outline Possible use	30 ft/min
K5.2 - Vermicular, compacted graphite iron with a hardness of 180 - 220HB	help_outline Possible use	23 ft/min
K5.3 - Vermicular, compacted graphite iron with a hardness of 220 - 260HB	help_outline Possible use	16 ft/min

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

N1

N1 - Wrought aluminium

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	Suitability	v_c
N1.1 - Pure aluminium and wrought aluminium alloys with a hardness of < 60HB	help_outline Possible use	33 ft/min
N1.2 - Wrought aluminium alloys with a hardness of 60 - 100HB	help_outline Possible use	26 ft/min
N1.3 - Wrought aluminium alloys with a hardness of 100 - 150HB	help_outline Possible use	16 ft/min

N2

N2 - Cast aluminium

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	Suitability	v_c
N2.1 - Cast aluminium alloys with a hardness of < 75HB	help_outline Possible use	66 ft/min
N2.2 - Cast aluminium alloys with a hardness of 75 - 90HB	help_outline Possible use	59 ft/min
N2.3 - Cast aluminium alloys with a hardness of 90 < 140HB	help_outline Possible use	43 ft/min

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 Possible use	112 ft/min
N3.3 - Electrolytic copper and long-chip copper-alloys with moderate to poor machining properties	help_outline Possible use	33 ft/min

N4

N4 - Polymers(synthetic or semi-synthetic materials)

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	Suitability	v_c	f
N4.1 - Thermoplastic polymers	help_outline Possible use	66 ft/min

S - High-temperature alloys (superalloys with high temperature stength and corrosion resistant surpassing that of stainless steel)

S1

S1 - Titanium or titanium alloys

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	Suitability	v_c	f
S1.3 - Titanium alloys, a hardness of 280 - 360HB	help_outline Possible use	10 ft/min

S2

S2 - Fe-based high-temperature alloys

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	Suitability	v_c	f
S2.1 - High-temperature Fe-based alloys with a hardness of <200HB	help_outline Possible use	16 ft/min

S3

S3 - Ni-based high-temperature alloys

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	Suitability	v_c	f
S3.1 - High-temperature Ni-based alloys with a hardness of <280HB	help_outline Possible use	13 ft/min

S4

S4 - Co-based high-temperature alloys

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	Suitability	v_c	f
S4.1 - High-temperature Co-based alloys with a hardness of <240HB	help_outline Possible use	10 ft/min