Page 157 - JBO-Katalog-2022

Reference of application and cutting data M
MF
MJ
EG M

G
Rc, R
Pg

UNC
UNF
UN
UNJF
Guide lines for cutting speeds, cutting fluids and rake angles.
Details for dies to be used.
NPT
material machined cutting cutting fluid rake die to be NPTF
speed angle used
guide lines
m/min

General engineering steels St37-2, St50-2 8-12 Cutting oil 17-22° (HSS)
Free-cutting steels 9SMn28, 9SMnPb28 10-14 Cutting oil 17-22° (HSS)
Cutting oil, VA, VA coated,
Case hardening steels C15, Ck15, 16MnCr5 6-10 17-22°
Special cutting oil LL, LL coated
Cutting oil, VA, VA coated,
Heat-treatable steels C35Pb, C45 5- 8 13-18°
Special cutting oil LL, LL coated
VA, VA coated,
Stainless steels X12CrMoS17, X12CrNiS188 4- 6 Special cutting oil 13-18°
LL, LL coated
Grey cast iron GG15, GG25 5- 8 Cutting oil, paraffin 13-18° GG-HSS-nitr M
MF
Brass giving short chips CuZn39Pb2, CuZn40Pb2 20-30 Cutting oil 6-11° MS, MS coated M keg.
M taper
Brass giving long chips CuZn20, CuZn37 12-18 Cutting oil 10-15° (HSS)
Ecobrass* CuZn21S13P 8-12 Cutting oil 10-15° Ecobrass G
BSW
Bronze CuSn8 5- 8 Cutting oil, soluble oil 13-18° BZ BSF
DIN 477
Gun metal G-CuSn5ZnPb 7-11 Cutting oil, soluble oil 13-18° RG-HSS-nitr. R, BA, Pg
Copper E-Cu57, SF-Cu 11-15 Cutting oil, soluble oil 23-28° CU
Special cutting oil, UNC
UNF
Al. alloys giving long chips AlCuMg1, AlMg3Si 15-25 paraffin 23-28° ALU UNEF
UN, UNS
Special cutting oil,
Al. alloys giving short chips GD-AlSi8Cu3, GDAlSi12 8-12 18-23° VA
paraffin
NPSM
VA, VA coated, LL, NPT
Pure titanium Ti2 5- 8 Special cutting oil 19–24°
LL coated NPTF
Tr, Rd
*low-lead and lead-free brass
Spiral entry
A spiral entry results in a free flow of chips ahead of the die
and a reduction in the cutting torque. Blocking of the clearance
holes by chips is avoided.
This results in an improved surface finish on the cut threads
and a longer die life.
M
Hence dies for machine use must be ordered with spiral entry. MF
HSS dies can be supplied with spiral entry for threads of 3 mm
dia. and above. All VA and LL dies for threads of 2 mm dia.
and above are supplied with spiral entry. G
BSW
BSF
R, Pg
MF-EL
UNC, UNF
UNEF
UN, UNS
UNJC
UNJF
Tel. +49 7432 9087 750 contact@johs-boss.de www.johs-boss.de 157 NPT
NPTF
Tr
EG