S21920.0

End Mill
Ordering number: 6706648

Extra short series end mill with 4 flutes, diameter 20mm with 26mm length of cut, 125mm overall length and 85mm reach with neck relief, according to DORMER standard with a 20mm plain shank, solid carbide with AlTiN coating, 40° helix and 3° rake angle for shoulder milling and plunging in martensitic, austenitic and super-austenitic, Duplex or precipitation hardening stainless steel and high-temperature alloys

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Product Feature

Aluminium Titanium Nitride Coating

Hard Material (Solid Carbide)

General Purpose Cutter Type for Low to High Resistance Materials

Cut Length, Extra Short

40° Helix Angle (Flute)

DIN 6535 HA Cylindrical Shank

h9 – Industry Standard Tool Tolerance Zone (based on diameter range)

Radial, Diagonal, Axial

Dormer Standards

Number of Flutes = 4 (teeth)

Product Operation

Shallow Shoulder Milling - Primary use

Plunge Milling - Primary use

Ramping - Possible use

Progressive Plunging - Possible use

Helical Interpolation - Possible use

Product Detail

Description	Value
EAN number	7320760681978
EDP number	46706648
Product name	S21920.0
Ordering code ANSI	S21920.0
Gross weight - grams	503.2
Cutting diameter - millimeter (DC)	20 mm
Connection diameter - millimeter (DCON MS)	20 mm
Depth of cut maximum - millimeter (APMX)	26 mm
Overall length - millimeter (OAL)	125 mm
Flute count (NOF)	4
Usable Length - millimeter (LU)	85 mm
Neck diameter - millimeter (DN)	19 mm
Radial rake angle (GAMF)	3
With Neck	Yes
ANSI	S21920.0
ISO	S21920.0

Cutting Conditions

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

P4

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

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	Suitability	v_c	f
P4.3 - Tool steel with a hardness of 39 - 45HRC	help_outline Primary use	210 ft/min	0.0039 inch/rev

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

M2

M2 - Martensitic stainless steel (straight chromium hardenable alloys)

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	Suitability	v_c	f
M2.3 - Stainless steel, martensitic with a hardness of 280 - 380HB	help_outline Primary use	210 ft/min	0.0039 inch/rev

M3

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

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	Suitability	v_c	f
M3.3 - Stainless steel, austenitic with a hardness of 260 - 300HB	help_outline Primary use	213 ft/min	0.0032 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 Primary use	210 ft/min	0.0032 inch/rev
M4.2 - Stainless steel, precipitation hardening austenitic with a hardness of 300 - 380HB	help_outline Primary use	177 ft/min	0.0032 inch/rev

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 Primary use	151 ft/min	0.0032 inch/rev

S2

S2 - Fe-based high-temperature alloys

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	Suitability	v_c	f
S2.2 - High-temperature Fe-based alloys with a hardness of 200-280HB	help_outline Primary use	125 ft/min	0.0032 inch/rev

S3

S3 - Ni-based high-temperature alloys

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	Suitability	v_c	f
S3.2 - High-temperature Ni-based alloys with a hardness of 280 - 360HB	help_outline Primary use	85 ft/min	0.0032 inch/rev

S4

S4 - Co-based high-temperature alloys

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	Suitability	v_c	f
S4.2 - High-temperature Co-based alloys with a hardness of 240 - 320HB	help_outline Primary use	72 ft/min	0.0032 inch/rev