1545A1/4

1545A NPT Pipe Tap
Ordering number: 6007218

Straight flute tap with a 2-3xP plug lead, for National Pipe Taper thread NPT 1/4" with 18 TPI and Normal class of fit, dimensions according to ANSI standard with 0.5630" shank and 0.4210" square drive, HSS with steam tempered surface finish for 1.5xD through or blind hole threading in alloy steel

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Product Feature

Steam Tempered (Steam Oxide) Surface Treatment

Thread Form, American National Pipe Taper

ANSI – Tap Standards

Normal Fit Class for Pipe Thread

1.5×D Usable Tool Depth to Diameter Ratio

High Speed Steel Tool Material

Straight Flute Geometry

Right Hand Rotation / Cutting

Product Detail

Description	Value
Product name	1545A1/4
EDP number	1052871
EAN number	698464020681
Thread diameter size (TDZ)	1/4
Threads per inch (TPI)	18
Overall length - millimeter (OAL)	61.91 mm
Overall length - inch (OAL)	2.4375 inch
Overall length - fractional inch (OAL)	2.7/16
Threading length - millimeter (THL)	26.99 mm
Threading length - inch (THL)	1.0625 inch
Threading length - fractional inch (THL)	1.1/16
Connection diameter - inch (DCON MS)	0.563 inch
Connection diameter - millimeter (DCON MS)	14.3 mm
Flute count (NOF)	4
Clamping width - inch (WSC)	0.421 inch
Clamping width - millimeter (WSC)	10.69 mm
Clamping Length - fractional inch (LCS)	7/16
Clamping Length - inch (LCS)	0.4375 inch
Clamping Length - millimeter (LSC)	11.11 mm
Gross weight - grams	52
ANSI	1545A1/4
ISO	1545A1/4
Ordering code ANSI	1545A1/4

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	26 ft/min
P1.2 - Free machining sulfurized and phosphorized carbon steel with a hardness of < 180HB	help_outline Possible use	30 ft/min
P1.3 - Free machining sulfurized/phosphorized and leaded carbon steel with a hardness of < 180HB	help_outline Possible use	30 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	23 ft/min
P2.2 - Plain medium carbon steel containing < 0.55%C with a hardness of < 240HB	help_outline Primary use	20 ft/min
P2.3 - Plain high carbon steel containing > 0.55%C, with a hardness of < 300HB	help_outline Possible use	16 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 Primary use	13 ft/min
P3.2 - Alloy steel with a hardness of 180 - 260HB	help_outline Primary use	13 ft/min
P3.3 - Alloy steel with a hardness of 260 - 360HB	help_outline Possible use	10 ft/min

P4

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

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	Suitability	v_c	f
P4.1 - Tool steel with a hardness of < 26HRC	help_outline Primary use	10 ft/min
P4.2 - Tool steel with a hardness of 26 - 39RC	help_outline Possible use	7 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	20 ft/min
K1.2 - Gray iron, ferritic-pearlitic or pearlitic with a hardness of 180 - 240HB	help_outline Possible use	13 ft/min
K1.3 - Gray iron, pearlitic with a hardness of 240 - 280HB	help_outline Possible use	10 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	23 ft/min
K2.2 - Malleable iron, ferritic or pearlitic with a hardness of 160 - 200HB	help_outline Possible use	20 ft/min
K2.3 - Malleable iron, pearlitic with a hardness of 200 - 240HB	help_outline Possible use	16 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	23 ft/min
K3.2 - Ductile (nodular/spheriodal) iron, ferritic or pearlitic with a hardness of 180 - 220HB	help_outline Possible use	16 ft/min
K3.3 - Ductile (nodular/spheriodal) iron, pearlitic with a hardness of 220 - 260HB	help_outline Possible use	13 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	20 ft/min
K4.2 - Austenitic cast iron with a hardness of 180 - 240HB	help_outline Possible use	16 ft/min
K4.3 - Austempered ductile iron with a hardness of 240 - 280HB	help_outline Possible use	10 ft/min
K4.4 - Austempered ductile iron with a hardness of 280 - 320HB	help_outline Possible use	10 ft/min
K4.5 - Austempered ductile iron with a hardness of 320 - 360HB	help_outline Possible use	7 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	23 ft/min
K5.2 - Vermicular, compacted graphite iron with a hardness of 180 - 220HB	help_outline Possible use	16 ft/min
K5.3 - Vermicular, compacted graphite iron with a hardness of 220 - 260HB	help_outline Possible use	13 ft/min

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

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	56 ft/min
N2.2 - Cast aluminium alloys with a hardness of 75 - 90HB	help_outline Possible use	49 ft/min
N2.3 - Cast aluminium alloys with a hardness of 90 < 140HB	help_outline Possible use	36 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	62 ft/min
N3.2 - Short-chip copper-alloys with good to moderate machining properties	help_outline Possible use	36 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	13 ft/min