Ratio Drill

	Type RT 100 U Guhring standard
Manufacturing specifications	Point grinding: relieved cone with secondary flank Point angle: greater than standard (140º) Web thinned: Guhring web thinning form S Helix angle: standard Web thickness: greater than standard Web taper: none Flute form: standard Tolerance on diameter: m7 Shank diameter: equal working diameter Other manufacturing specifications to DIN 6540.
Range of applications	High-performance drill for the drilling of long and short- chipping materials such as structural and case hardened steels, cast steels, heat-treatable steels and alloyed steels with a tensile strength of up to 1000 N/mm˛, including carbon steels, cast iron and high-alloyed AlSi-alloys. Multi-purpose application (S-coat = allround-coat) in small batch production, when one tool is used for drilling several different materials. This tool is also available A- and C-coated, for performance increases in special operations. Recoating is definitely necessary when regrinding. C-tools can be recoated with TiN (S-coat). Advantages, Suggestions Highest speed and feed rates possible (see Guroguide), high alignment accuracy with small diameter tolerance and excellent surface finish. Excellent self-centering qualities as well as producing short chips thanks to a concave cutting point geometry with special point grind and web thinning. Pre-conditions for use Powerful machines. No play in spindle bearings. Alignment accurate tool holders. Max. concentricity error of clamped tools: 0.02 mm. Chatterfree, mechanical feeds.
Sketch
Tool material	carbide
Cutting direction	right hand-cutting
Surface
Ø-range	5.00-16.00 mm
Series No.	1243