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RT 100 T – machining steps
Procedure Ratio end mill type RF 100 U, Guhring no. 3736
In order to achieve optimal machining results when producing deep holes Thanks to its unequal helix angle, Guhring’s FIRE-coated Ratio end
with type RT 100T especially spotting on radii or on an uneven surface struc- mill RF 100 U offers highest feed rates and tool life for finishing and
ture, we recommend the following machining steps: roughing operations in steel and cast materials as well asTi- and Ni-
1. Initial milling of surface, i.e. with Guhring’s centre cutting Ratio end mill RF alloys. Further information about the range can be found in Guhring’s
current main catalogue.
100 U.The surface must be machined at right angles to the entry angle of
the drilling operation. Ratio drill RT 100 U, Guhring no. 2477
2. Production of a cylindrical pilot hole (tolerance F9) with a minimum drilling Ratio drill RT 100 F, Guhring no. 1660
depth of 1 x D. For this operation we recommend our Ratio drills RT 100 U Thanks to their special cutting edge geometry, Guhring’s Ratio drills excel
or RT 100 F respectively.Thanks to a 140 point angle and a m7 tolerance with very good self-centering characteristics and alignment accurate ho-
on diameter these Ratio drills are especially suitable for this machining les.Type U is especially suitable for the machining of steel and high-allo-
task. yed AlSi-alloys, type F for high-alloyed, stainless, acid- and heat-resistant
3. Entry of spiral-flute deep hole drill RT 100T in the pilot hole at a speed of steels, Al and Al-alloys, Mg and Mg-alloys as well asTi andTi-alloys.
approx. 300 rev./min and with a feed rate of approx. 500 mm/min.
4. Setting of coolant pressure and speed. All deep hole drills must have support for the pilot hole.
5. Continuous drilling to complete hole depth without wood pecking. Deep hole drills must never operate at full speed without sup-
6. For through holes with oblique exit, reduce the feed rate vf to 40% approx. 1 port in the machine shop.
mm prior to break-through.
7. After reaching hole depth stop machine spindle and coolant supply, with-
drawal in top gear.
drill Feed column no.
mm
4 5 67 8 9
3.50 0.063 0.080 0.160 0.160
4.00 0.080 0.100 f (mm/rev) 0.200 0.200
5.00 0.080 0.100 0.200 0.250
6.30 0.100 0.125 0.100 0.125 0.250 0.315
8.00 0.125 0.160 0.125 0.160 0.315 0.315
10.00 0.160 0.200 0.125 0.160 0.400 0.400
12.50 0.160 0.200 0.160 0.200 0.400 0.500
16.00 0.200 0.250 0.200 0.250 0.500 0.630
0.250 0.315
0.250 0.315
0.315 0.400
Tool material Material examples Tensile strength Hard-
Figures in bold = material no. to DIN EN MPa (N/mm2) ness
Common structural steels
1.0035 S185, 1.0486 StE P275N, 1.0345 P235GH, 1.0425 P265GH 500
Free-cutting steels 1.0050 E295, 1.0070 E360, 1.8937 P500NH > 500-850
1.0718 11SMnPb30, 1.0736 115Mn37 850
Unalloyed heat-treatable steels 1.0727 46 S20, 1.0728 60 S20, 1.0757 46SPb20
1.0402 C22, 1.1178 C30E 850-1000
Alloyed heat-treatable steels 1.0503 C45, 1.1191 C45E 700
1.0601 C60, 1.1221 C60E 700-850
Unalloyed case hardened steels 1.5131 50MnSi4, 1.7003 38Cr2, 1.7030 28Cr4 850-1000
Alloyed case hardened steels 1.5710 36NiCr6, 1.7035 41Cr4, 1.7225 42CrMo4
1.0301 C10, 1.1121 C10E 850-1000
Nitriding steels 1.7043 38Cr4 1000-1200
1.5752 14NiCr14, 1.7131 16MnCr5, 1.7264 20CrMo5 750
Tool steels 1.8504 34CrAl6
1.8519 31CrMoV9, 1.8550 34CrAlNi7 850-1000
High speed steels 1.1750 C75W, 1.2067 102Cr6, 1.2307 29CrMoV9 1000-1200
Spring steels 1.2080 X210Cr12, 1.2083 X42Cr13, 1.2419 105WCr6, 1.2767 X45NiCrMo4 850-1000
Stainless steels, sulphured 1.3243 S 6-5-2-5, 1.3343 S 6-5-2, 1.3344 61CrV4 1000-1200
austenitic 1.5026 55Si7, 1.7176 55Cr3, 1.8159 51CrV4 850
martensitic 1.4005 X12CrS13, 1.4104 X14CrMoS17, 1.4105 X6CrMoS17, 850-1000
Hardened steels 1.4301 X5CrNi18 10, 1.4541 X6CrNiTi18 10, 1.4571 X6CrNiMoTi 17 12 2 650-1000
Special alloys 1.4057 X17CrNi16-1, 1.4122 X39CrMo17-1, 1.4521 X2CrMoTi18 2
Cast iron – 330 HB
Nimonic, Inconel, Monel, Hastelloy
New cast materials GGV 0.6010 EN-GJL-100 (GG10), 0.6020 EN-GJL-200 (GG20) 850
0.6025 EN-GJL-250 (GG25), 0.6035 EN-GJL-350 (GG35) 850
New cast materials ADI EN-GJV250 (GGV25), EN-GJV350 (GGV35)
EN-GJV400 (GGV40), EN-GJV500 (GGV50), SiMo 6 850 40-60 HRC
Spheroidal graphite iron and EN-GJS-800-8 (ADI800), EN-GJS-1000-5 (ADI1000) 1200 240 HB
malleable cast iron EN-GJS-1200-2 (ADI1200), EN-GJS-1400-1 (ADI1400)
Chilled cast iron 0.7050 EN-GJS-500-7 (GGG50), 0.8035 EN-GJMW-350-4 (GTW35) <300 HB
Ti and Ti-alloys 0.7070 EN-GJS-700-2 (GGG70), 0.8170 EN-GJMB-700-2 (GTS70)
– 800-1000 240 HB
Aluminium and Al-alloys 3.7024 Ti99,5, 3.7114 TiAl5Sn2,5, 3.7124 TiCu2 1200-1400 <300 HB
Al wrought alloys 3.7154 TiAl6Zr5, 3.7164 TiAl6V4, 3.7184 TiAl4Mo4Sn2,5, - TiAl8Mo1V1 350 HB
Al cast iron 10 % Si 3.0255 Al99,5, 3.2315 AlMgSi1, 3.3515 AlMg1 850
> 10% Si 3.0615 AlMgSiPb, 3.1325 AlCuMg1, 3.3245 AlMg3Si 850-1200
Magnesium alloys 3.2131 G-AlSi5Cu1, 3.2153 G-AlSi7Cu3, 3.2573 G-AlSi9 400
Copper, low-alloyed 3.2581 G-AlSi12, 3.2583 G-AlSi12Cu, - G-AlSi12CuNiMg 450
Brass, short-chipping MgMn2, G-MgAl8Zn1, G-MgAl6Zn3 600
langspanend 2.0070 SE-Cu, 2.1020 CuSn6, 2.1096 G-CuSn5ZnPb 600
Bronze, short-chipping 2.0380 CuZn39Pb2, 2.0401 CuZn39Pb3, 2.0410 CuZn43Pb2 450
2.0250 CuZn20, 2.0280 CuZn33, 2.0332 CuZn37Pb0,5 400
Bronze, long-chipping 2.0380 CuZn39Pb2, 2.0401 CuZn39Pb3, 2.0410 CuZn43Pb2 600
2.0250 CuZn20, 2.0280 CuZn33, 2.0332 CuZn37Pb0,5 600
2.0380 CuZn39Pb2, 2.0401 CuZn39Pb3, 2.0410 CuZn43Pb2 600
2.0250 CuZn20, 2.0280 CuZn33, 2.0332 CuZn37Pb0,5 >600-850
850
850-1000
10 RT 100T guhring@guhring-tools.ru
www.guhring-tools.ru
