Counterbore DIN 373, fine - CNTBRE-DIN373-HSS-FINE-M8

Counterbore DIN 373, fine

Name: Counterbore DIN 373, fine
Brand: Würth
SKU: 0694150008

Counterbore DIN 373 fine
CNTBRE-DIN373-HSS-FINE-M8

Art.-no. 0694150008

EAN 4056807537412

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Counterbore DIN 373, fine

Art.-no. 0694150008

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For all ferrous and non-ferrous metals, hard and soft plastics. For use in through holes according to DIN 273 quality grade "fine" for single and series production. For countersinking hexagon socket screws DIN 912, 6912, 7984 and cheese head screws ISO 1207 (DIN 84).

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Product code	2140
Quality grade	Fine
Material to be processed	Steel, Cast metal, Stainless steel, Copper, Brass, Aluminium, Plastic
Suitable for screw	M8
Diameter of tenon (d1)	8.4 mm
Spot-facer diameter (d2)	15.0 mm
Shank diameter (d3)	12.5 mm
Length (l1)	100 mm
Length of head (l2)	22 mm
Number of cutting edges (Z)	3 PCS
Standards	DIN 373
Cutting material	HSS
Surface	Plain
Shank style	Cylindrical
Quality	Würth-Standard
Material of sub-group	General structural steels, Non-alloyed tempering steels < 1000 N/mm², Alloyed tempering steels < 1000 N/mm², Nitriding steels < 1300 N/mm², Grey cast iron, Malleable cast iron, Stainless steels < 850 N/mm², Stainless steels > 850 N/mm², Copper, Brass, Aluminium, Plastics

Cutting values for HSS counterbores
For M3-M6
Material designation	Tensile strength	v_c		f
		from	to	M3	M4	M5	M6
General structural steels	< 500 N/mm²	26	30	0,090	0,104	0,120	0,126
General structural steels	500-850 N/mm²	25	28	0,080	0,093	0,100	0,105
Carbon steels	< 850 N/mm²	25	28	0,080	0,093	0,100	0,105
Carbon steels	850-1000 N/mm²	18	25	0,060	0,070	0,080	0,084
Unalloyed heat-treated steels	< 700 N/mm²	25	28	0,080	0,093	0,100	0,105
	700-850 N/mm²	25	28	0,080	0,093	0,100	0,105
	850-1000 N/mm²	18	25	0,060	0,070	0,080	0,084
Alloyed heat-treated steels	850-1000 N/mm²	18	25	0,060	0,070	0,080	0,084
Alloyed heat-treated steels	1000-1200 N/mm²	6	10	0,040	0,046	0,050	0,053
Unalloyed case-hardening steels	< 750 N/mm²	25	28	0,080	0,093	0,100	0,105
Alloyed case-hardening steels	< 1000 N/mm²	18	25	0,060	0,070	0,080	0,084
Alloyed case-hardening steels	1000-1200 N/mm²	6	10	0,040	0,046	0,050	0,053
Nitriding steels	< 1000 N/mm²	18	25	0,060	0,070	0,080	0,084
Nitriding steels	1000-1200 N/mm²	6	10	0,040	0,046	0,050	0,053
Tool steels	< 850 N/mm²	18	25	0,060	0,070	0,080	0,084
	850-1100 N/mm²	6	10	0,040	0,046	0,050	0,053
	1100-1400 N/mm²	2	5	0,030	0,035	0,040	0,042
High-speed steels	850-1200 N/mm²	6	10	0,040	0,046	0,050	0,053
Wear-resistant constructional steel	1350 N/mm²	2	5	0,030	0,035	0,040	0,042
Spring steels	< 1200 N/mm²	6	10	0,040	0,046	0,050	0,053
Stainless steels, sulphurated	< 700 N/mm²	4	10	0,050	0,058	0,060	0,063
Stainless steels, austenitic	< 700 N/mm²	4	10	0,050	0,058	0,060	0,063
Stainless steels, austenitic	< 850 N/mm²	4	10	0,050	0,058	0,060	0,063
Stainless steels, martensitic	< 1100 N/mm²	4	10	0,050	0,058	0,060	0,063
Cast iron	< 180 HB	15	24	0,100	0,116	0,120	0,126
Cast iron	> 180 HB	9	15	0,070	0,081	0,080	0,084
Nodular graphite, malleable iron	> 180 HB	9	15	0,070	0,081	0,080	0,084
Nodular graphite, malleable iron	> 260 HB	9	15	0,070	0,081	0,080	0,084
Aluminium, aluminium alloys	< 530 N/mm²	50	90	0,120	0,139	0,140	0,147
Aluminium, cast aluminium alloys < 10 % Si	< 600 N/mm²	25	40	0,100	0,116	0,120	0,126
Magnesium, magnesium alloys	< 280 N/mm²	50	90	0,120	0,139	0,140	0,147
Copper, low-alloy	< 350 N/mm²	25	40	0,100	0,116	0,120	0,126
Brass, short-chipping	< 600 N/mm²	50	80	0,120	0,139	0,140	0,147
Brass, long-chipping	< 600 N/mm²	30	50	0,120	0,139	0,140	0,147
Bronze, short-chipping	< 600 N/mm²	50	80	0,120	0,139	0,140	0,147
Bronze, short-chipping	650-850 N/mm²	50	80	0,120	0,139	0,140	0,147
Bronze, long-chipping	< 850 N/mm²	30	50	0,120	0,139	0,140	0,147
Bronze, long-chipping	850-1200 N/mm²	30	50	0,120	0,139	0,180	0,189

Legend
v_c = cutting speed [m/min]
f = feed [mm/r]
The suggested cutting values are reference values and must be adapted to the respective conditions.

Cutting values for HSS counterbores
For M8-M12
Material designation	Tensile strength	v_c		f
		from	to	M8	M10	M12
General structural steels	< 500 N/mm²	26	30	0,132	0,140	0,160
General structural steels	500-850 N/mm²	25	28	0,110	0,120	0,140
Carbon steels	< 850 N/mm²	25	28	0,110	0,120	0,140
Carbon steels	850-1000 N/mm²	18	25	0,088	0,100	0,120
Unalloyed heat-treated steels	< 700 N/mm²	25	28	0,110	0,120	0,140
	700-850 N/mm²	25	28	0,110	0,120	0,140
	850-1000 N/mm²	18	25	0,088	0,100	0,120
Alloyed heat-treated steels	850-1000 N/mm²	18	25	0,088	0,100	0,120
Alloyed heat-treated steels	1000-1200 N/mm²	6	10	0,055	0,090	0,080
Unalloyed case-hardening steels	< 750 N/mm²	25	28	0,110	0,120	0,140
Alloyed case-hardening steels	< 1000 N/mm²	18	25	0,088	0,100	0,120
Alloyed case-hardening steels	1000-1200 N/mm²	6	10	0,055	0,090	0,080
Nitriding steels	< 1000 N/mm²	18	25	0,088	0,100	0,120
Nitriding steels	1000-1200 N/mm²	6	10	0,055	0,090	0,080
Tool steels	< 850 N/mm²	18	25	0,088	0,100	0,120
	850-1100 N/mm²	6	10	0,055	0,090	0,080
	1100-1400 N/mm²	2	5	0,044	0,050	0,060
High-speed steels	850-1200 N/mm²	6	10	0,055	0,090	0,080
Wear-resistant constructional steel	1350 N/mm²	2	5	0,044	0,050	0,060
Spring steels	< 1200 N/mm²	6	10	0,055	0,090	0,080
Stainless steels, sulphurated	< 700 N/mm²	4	10	0,066	0,070	0,080
Stainless steels, austenitic	< 700 N/mm²	4	10	0,066	0,070	0,080
Stainless steels, austenitic	< 850 N/mm²	4	10	0,066	0,070	0,080
Stainless steels, martensitic	< 1100 N/mm²	4	10	0,066	0,070	0,080
Cast iron	< 180 HB	15	24	0,132	0,160	0,200
Cast iron	> 180 HB	9	15	0,088	0,120	0,160
Nodular graphite, malleable iron	> 180 HB	9	15	0,088	0,120	0,160
Nodular graphite, malleable iron	> 260 HB	9	15	0,088	0,120	0,160
Aluminium, aluminium alloys	< 530 N/mm²	50	90	0,154	0,180	0,220
Aluminium, cast aluminium alloys < 10 % Si	< 600 N/mm²	25	40	0,132	0,140	0,180
Magnesium, magnesium alloys	< 280 N/mm²	50	90	0,154	0,180	0,220
Copper, low-alloy	< 350 N/mm²	25	40	0,132	0,140	0,180
Brass, short-chipping	< 600 N/mm²	50	80	0,154	0,180	0,200
Brass, long-chipping	< 600 N/mm²	30	50	0,154	0,180	0,200
Bronze, short-chipping	< 600 N/mm²	50	80	0,154	0,180	0,200
Bronze, short-chipping	650-850 N/mm²	50	80	0,154	0,180	0,200
Bronze, long-chipping	< 850 N/mm²	30	50	0,154	0,180	0,200
Bronze, long-chipping	850-1200 N/mm²	30	50	0,198	0,180	0,200