Subland drill bit DIN 8377 RN medium 180°, with Morse taper

Name: Subland drill bit DIN 8377 RN medium 180°, with Morse taper
Brand: Würth
SKU: 5443811003

Subland drill bit MK HSS DIN 8377 medium 180°
DRL-STEP-MF-DIN8377RNM-180DGR-HSS-D15,5

Art.-no. 5443811003

EAN 4062856086184

All versions

Specification

For the production of through holes according to ISO 273, while simultaneously producing countersinks (180˚) in form H, J, K, H3, J3 and K3 according to DIN 74 part 2. The cutting speed depends on the large diameter, the feed on the small diameter.

Technical information


Product code	852
Material to be processed	Steel, Cast metal, Copper, Brass, Aluminium, Plastic
Suitable for screw	M14
Standards	DIN 8377
Cutting material	HSS
Surface	Vaporised
Angle of the tip	118 Degree
Pilot hole diameter (d1)	15.5 mm
Spot-facer diameter (d2)	24 mm
Length (l1)	281 mm
Chip flute length (l2)	130 mm
Pilot hole length (l3)	31 mm
Countersink angle	180 Degree
Shank style	Morse taper
Suitable for morse taper tools	MK 3
Number of teeth	2 PCS
Coolant supply	External
Tolerance of cutting edge diameter	h8
Tolerance of shank diameter	h8
Type description	Quality grade medium
Material of sub-group	General structural steels, Non-alloyed tempering steels < 1000 N/mm², Alloyed tempering steels < 1000 N/mm², Grey cast iron, Malleable cast iron, Copper, Brass, Aluminium, Plastics

Cutting values for HSS drill bits
For dia. 11 to dia. 17.5
Material designation	Tensile strength	v_c		f
		from	to	Dia. 11-11.9	Dia. 12-15.9	Dia. 16-17.5
General structural steels	< 500 N/mm²	30	50	0,200	0,250	0,300
General structural steels	500-850 N/mm²	25	35	0,200	0,250	0,300
Machining steels	< 850 N/mm²	25	35	0,200	0,250	0,300
Machining steels	850-1000 N/mm²	20	30	0,100	0,160	0,200
Unalloyed heat-treated steels	< 700 N/mm²	25	35	0,100	0,160	0,200
	700-850 N/mm²	20	30	0,100	0,160	0,200
	850-1000 N/mm²	20	25	0,090	0,140	0,180
Alloyed heat-treated steels	850-1000 N/mm²	15	20	0,080	0,120	0,140
Alloyed heat-treated steels	1000-1200 N/mm²	8	12	0,080	0,120	0,140
Non-alloyed case-hardening steels	< 750 N/mm²	25	35	0,100	0,160	0,200
Alloyed case-hardening steels	< 1000 N/mm²	15	20	0,080	0,120	0,140
Alloyed case-hardening steels	1000-1200 N/mm²	8	12	0,080	0,120	0,140
Nitriding steels	< 1000 N/mm²	10	15	0,080	0,120	0,140
Nitriding steels	1000-1200 N/mm²	8	12	0,080	0,120	0,140
Tool steels	< 850 N/mm²	10	15	0,080	0,120	0,140
Tool steels	850-1100 N/mm²	8	12	0,080	0,120	0,140
Cast iron	< 180 HB	20	30	0,200	0,250	0,300
Cast iron	> 180 HB	20	30	0,160	0,200	0,250
Spheroidal graphite, malleable iron	> 180 HB	25	35	0,200	0,250	0,300
Spheroidal graphite, malleable iron	> 260 HB	18	22	0,160	0,200	0,250
Aluminium, aluminium alloys	< 530 N/mm²	40	100	0,180	0,220	0,300
Aluminium, cast aluminium alloys < 10 % Si	< 600 N/mm²	30	60	0,180	0,220	0,300
Magnesium, magnesium alloys	< 280 N/mm²	40	100	0,180	0,220	0,300
Copper, low-alloy	< 350 N/mm²	35	65	0,180	0,220	0,300
Brass, short-chipping	< 600 N/mm²	60	100	0,250	0,300	0,350
Brass, long-chipping	< 600 N/mm²	35	60	0,400	0,250	0,350
Bronze, short-chipping	< 600 N/mm²	25	50	0,140	0,200	0,250
Bronze, short-chipping	650-850 N/mm²	25	50	0,140	0,200	0,250
Bronze, long-chipping	< 850 N/mm²	15	35	0,140	0,200	0,250
Bronze, long-chipping	850-1200 N/mm²	15	35	0,140	0,200	0,250