239TBT1/4

239TBT Jobber Drill
Ordering number: 6001080

Jobber length trailer bit drill with straight shank, diameter 0.2500" (1/4) with an overall length of 4" and flute length of 2.3/4" according to ANSI standard with 135° split point, HSS with steam tempered finish for 4xD drilling without pecking in steel and cast iron

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Product Feature

Steam Tempered (Steam Oxide) Surface Treatment

High Speed Steel Tool Material

ANSI – Tap Standards

4×D Usable Tool Depth to Diameter Ratio

Drill Point 135°

Cylindrical Shank / Straight Shank

Right Hand Rotation / Cutting

Product Detail

Description	Value
EAN number	086071419651
EDP number	041965
Product name	239TBT1/4
Ordering code ANSI	239TBT1/4
Gross weight - grams	18
Length chip flute - inch (LCF)	2.75 inch
Cutting diameter - fractional inch (DC)	1/4
Cutting diameter - inch (DC)	0.25 inch
Cutting diameter - millimeter (DC)	6.35 mm
Length chip flute - fractional inch (LCF)	2.3/4
Overall length - fractional inch (OAL)	4"
Overall length - inch (OAL)	4 inch
Overall length - millimeter (OAL)	101.6 mm
ANSI	239TBT1/4
ISO	239TBT1/4

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	f
P1.1 - Free machining sulfurized carbon steel with a hardness of < 240HB	help_outline Possible use	118 ft/min	0.0062 inch/rev
P1.2 - Free machining sulfurized and phosphorized carbon steel with a hardness of < 180HB	help_outline Possible use	131 ft/min	0.0062 inch/rev
P1.3 - Free machining sulfurized/phosphorized and leaded carbon steel with a hardness of < 180HB	help_outline Possible use	135 ft/min	0.0062 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 Possible use	102 ft/min	0.0062 inch/rev
P2.2 - Plain medium carbon steel containing < 0.55%C with a hardness of < 240HB	help_outline Possible use	89 ft/min	0.0052 inch/rev
P2.3 - Plain high carbon steel containing > 0.55%C, with a hardness of < 300HB	help_outline Primary use	79 ft/min	0.0038 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 Possible use	82 ft/min	0.0045 inch/rev
P3.2 - Alloy steel with a hardness of 180 - 260HB	help_outline Possible use	66 ft/min	0.0045 inch/rev
P3.3 - Alloy steel with a hardness of 260 - 360HB	help_outline Primary use	56 ft/min	0.0038 inch/rev

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 Possible use	49 ft/min	0.0045 inch/rev
P4.2 - Tool steel with a hardness of 26 - 39RC	help_outline Primary use	43 ft/min	0.0038 inch/rev
P4.3 - Tool steel with a hardness of 39 - 45HRC	help_outline Primary use	33 ft/min	0.0032 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	98 ft/min	0.0038 inch/rev
M1.2 - Stainless steel, ferritic with a hardness of 160 - 220HB	help_outline Possible use	85 ft/min	0.0038 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	89 ft/min	0.0038 inch/rev
M2.2 - Stainless steel, martensitic with a hardness of 200 - 280HB	help_outline Possible use	72 ft/min	0.0038 inch/rev

M3

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

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	Suitability	v_c	f
M3.1 - Stainless steel, austenitic with a hardness of < 200HB	help_outline Possible use	43 ft/min	0.0052 inch/rev
M3.2 - Stainless steel, austenitic with a hardness of 200 - 260HB	help_outline Possible use	36 ft/min	0.0052 inch/rev
M3.3 - Stainless steel, austenitic with a hardness of 260 - 300HB	help_outline Possible use	33 ft/min	0.0026 inch/rev

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	49 ft/min	0.0026 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	115 ft/min	0.0062 inch/rev
K1.2 - Gray iron, ferritic-pearlitic or pearlitic with a hardness of 180 - 240HB	help_outline Possible use	85 ft/min	0.0032 inch/rev
K1.3 - Gray iron, pearlitic with a hardness of 240 - 280HB	help_outline Possible use	62 ft/min	0.0032 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	89 ft/min	0.0038 inch/rev
K2.2 - Malleable iron, ferritic or pearlitic with a hardness of 160 - 200HB	help_outline Possible use	72 ft/min	0.0038 inch/rev
K2.3 - Malleable iron, pearlitic with a hardness of 200 - 240HB	help_outline Primary use	59 ft/min	0.0038 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	79 ft/min	0.0038 inch/rev
K3.2 - Ductile (nodular/spheriodal) iron, ferritic or pearlitic with a hardness of 180 - 220HB	help_outline Possible use	59 ft/min	0.0038 inch/rev
K3.3 - Ductile (nodular/spheriodal) iron, pearlitic with a hardness of 220 - 260HB	help_outline Primary use	49 ft/min	0.0038 inch/rev

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	f
K4.1 - Austenitic cast iron with a hardness of < 180HB	help_outline Possible use	72 ft/min	0.0038 inch/rev
K4.2 - Austenitic cast iron with a hardness of 180 - 240HB	help_outline Possible use	56 ft/min	0.0038 inch/rev
K4.3 - Austempered ductile iron with a hardness of 240 - 280HB	help_outline Primary use	39 ft/min	0.0038 inch/rev
K4.4 - Austempered ductile iron with a hardness of 280 - 320HB	help_outline Primary use	36 ft/min	0.0038 inch/rev
K4.5 - Austempered ductile iron with a hardness of 320 - 360HB	help_outline Primary use	30 ft/min	0.0038 inch/rev

K5

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

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	Suitability	v_c	f
K5.1 - Vermicular, compacted graphite iron with a hardness of < 180HB	help_outline Possible use	82 ft/min	0.0038 inch/rev
K5.2 - Vermicular, compacted graphite iron with a hardness of 180 - 220HB	help_outline Possible use	62 ft/min	0.0038 inch/rev
K5.3 - Vermicular, compacted graphite iron with a hardness of 220 - 260HB	help_outline Primary use	49 ft/min	0.0038 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 Possible use	108 ft/min	0.0081 inch/rev
N1.2 - Wrought aluminium alloys with a hardness of 60 - 100HB	help_outline Possible use	82 ft/min	0.0081 inch/rev
N1.3 - Wrought aluminium alloys with a hardness of 100 - 150HB	help_outline Possible use	56 ft/min	0.0071 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	151 ft/min	0.0062 inch/rev
N2.2 - Cast aluminium alloys with a hardness of 75 - 90HB	help_outline Possible use	138 ft/min	0.0062 inch/rev
N2.3 - Cast aluminium alloys with a hardness of 90 < 140HB	help_outline Possible use	98 ft/min	0.0062 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 Possible use	223 ft/min	0.0062 inch/rev
N3.2 - Short-chip copper-alloys with good to moderate machining properties	help_outline Possible use	131 ft/min	0.0045 inch/rev
N3.3 - Electrolytic copper and long-chip copper-alloys with moderate to poor machining properties	help_outline Possible use	66 ft/min	0.0062 inch/rev

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239TBT1-4_6001080_3D

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