HSS 90° yellow-ring countersink DIN 335C - CNTSNK-CONI-MA-YELLOW-HSS-90DGR-D20,5MM

HSS 90° yellow-ring countersink DIN 335C - CNTSNK-CONI-MA-YELLOW-HSS-90DGR-D20,5MM - 1

HSS 90° yellow-ring countersink DIN 335C

Name: HSS 90° yellow-ring countersink DIN 335C
Brand: Würth
SKU: 069401820

Conical countersink HSS, yellow ring
CNTSNK-CONI-MA-YELLOW-HSS-90DGR-D20,5MM
ZEBRA

Art.-no. 069401820

EAN 4011231603317

All versions

Specification

Designed specifically for processing aluminium, copper, aluminium alloys and plastics

Burr- and chatter-free countersinking and deburring

Precision conical countersink with 3 cutting edges, precision-ground

Optimised spiral flute geometry

Excellent chip formation and removal

Sustainable product packaging made from 100 % PCR (recycled plastic from household waste), 100 % recyclable and Cradle to Cradle Certified^_® in Bronze

Technical information


Material to be processed	Aluminium
Quality	ZEBRA-Premium
Spot-facer diameter (d1)	20.5 mm
Shank diameter (d2)	10 mm
Tip diameter (d3)	3.5 mm
Length (l1)	63 mm
Number of cutting edges (Z)	3 PCS
Standards	DIN 335
Form	C
Cutting material	HSS
Countersink angle	90 Degree
Surface	Uncoated
Shank style	Cylindrical
Service life (points system)	2 of 4 points
Countersinking speed (point system)	2 of 4 points
Countersinking quality (point system)	2 of 4 points
Versatility (points system)	1 of 4 points
Countersinking behaviour (point system)	2 of 4 points
Material of sub-group	Aluminium, Aluminium alloys, Aluminium wrought alloys, Aluminium casting alloys (<10% silicon), Aluminium casting alloys (>10% silicon), Magnesium alloys, Copper, Brass, short-chipping, Brass, long-chipping, Bronze, short-chipping, Bronze, long-chipping, Plastics, thermoset, Plastics, thermoplastic, Plastics, aramide-fibre reinforced, Plastics, glass/carbon-fibre-reinforced

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.

Assignment of conical countersink to screw standards
Conical countersink nominal diameter d1	For countersunk head screws	For countersunk head screws
	DIN EN ISO 10642 (formerly DIN 7991)	DIN EN ISO 2009, 2010, 7046, 7047 (formerly DIN 963,964,965,966)
6.3 mm	M3	M3
8.3 mm	M4	-
10.4 mm	M5	M4, M5
12.4 mm	M6	M6
16.5 mm	M8	M8
20.5 mm	-	M10
25.0 mm	M10, M12	M12
31.0 mm	M16	-

For dia. 16.5–31
Material designation	Tensile strength	v_c	f
			Dia. 16.5	Dia. 20.5	Dia. 25	Dia. 31
Aluminium and aluminium alloys	≤ 400 N/mm²	90	0,210	0,230	0,260	0,300
Wrought aluminium alloys	≤ 650 N/mm²	70	0,210	0,230	0,260	0,300
Cast aluminium alloys ≤ 10% Si	≤ 600 N/mm²	40	0,170	0,180	0,210	0,240
Cast aluminium alloys > 10% Si	≤ 600 N/mm²	30	0,170	0,180	0,210	0,240
Magnesium alloys	≤ 400 N/mm²	100	0,210	0,230	0,260	0,300
Copper, low-alloyed	≤ 500 N/mm²	60	0,210	0,230	0,260	0,300
Brass, short-chipping	≤ 600 N/mm²	80	0,210	0,230	0,260	0,300
Brass, long-chipping	≤ 600 N/mm²	50	0,210	0,230	0,260	0,300
Bronze, short-chipping	≤ 600 N/mm²	30	0,210	0,230	0,260	0,300
Bronze, short-chipping	≤ 850 N/mm²	26	0,210	0,230	0,260	0,300
Bronze, long-chipping	≤ 850 N/mm²	24	0,210	0,230	0,260	0,300
Bronze, long-chipping	≤ 1000 N/mm²	20	0,210	0,230	0,260	0,300
Plastics	≤ 150 N/mm²	30	0,210	0,230	0,260	0,300

Cutting values for HSS countersinks
For dia. 6.3–12.4
Material designation	Tensile strength	v_c	f
			Dia. 6.3	Dia. 8.3	Dia. 10.4	Dia. 12.4
Aluminium and aluminium alloys	≤ 400 N/mm²	90	0,150	0,160	0,170	0,190
Wrought aluminium alloys	≤ 650 N/mm²	70	0,150	0,160	0,170	0,190
Cast aluminium alloys ≤ 10% Si	≤ 600 N/mm²	40	0,120	0,130	0,140	0,150
Cast aluminium alloys > 10% Si	≤ 600 N/mm²	30	0,120	0,130	0,140	0,150
Magnesium alloys	≤ 400 N/mm²	100	0,150	0,160	0,170	0,190
Copper, low-alloyed	≤ 500 N/mm²	60	0,150	0,160	0,170	0,190
Brass, short-chipping	≤ 600 N/mm²	80	0,150	0,160	0,170	0,190
Brass, long-chipping	≤ 600 N/mm²	50	0,150	0,160	0,170	0,190
Bronze, short-chipping	≤ 600 N/mm²	30	0,150	0,160	0,170	0,190
Bronze, short-chipping	≤ 850 N/mm²	26	0,150	0,160	0,170	0,190
Bronze, long-chipping	≤ 850 N/mm²	24	0,150	0,160	0,170	0,190
Bronze, long-chipping	≤ 1000 N/mm²	20	0,150	0,160	0,170	0,190
Plastics	≤ 150 N/mm²	30	0,150	0,160	0,170	0,190

Documents

Product information

Würth Catalogue

Datasheets(X)

Certificates/ Documents

Accessory

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Product

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