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Place the HSS standard drill of different manufacturers (DIN 338) next to each other and compare. Can you see the difference? With difficulty. There are surely differences in performance, but unfortunately, you cannot see those! Because these "common" drills are oftentimes only bought from the cheapest supplier, the "performance" factor is not important.
Fig. 1.2: Wave form on the point reduces wear and encourages the chip to break. Wave form in the flute finally causes the chip to break. Fig. 1.3: Performance drill P2000, DIN 338, Series # 2047.	We argued and publicised (cheap is not cheap) a great deal, but nothing has really changed. But we didn't give up and developed the wave form (fig. 1.2), initially for our standard type N, DIN 338, thermally "colored" bronze and named it Performance-drill P2000 (fig. 1.3). Performance and cost will scare those cheap suppliers.
Advantages of the wave form: With the development of the grinding technology specially for the production of the wave form, we realised 2 objectives: the wave form on the point increases the length of the cutting edge, thereby reducing the cutting force (influenced by workpiece material, feed rate and Ø), and can now be distributed over a further distance. However, the reduced cutting force reduces wear and therefore increases tool life accordingly, an average by 70 %! as we set ourselves the goal of having a 100 % performance increase (fig. 1.4), the P2000 is not produced in HSS but in HSCO, as an added bonus. Fig. 1.4: Tool life comparison between cheap HSS standard jobber drill and Performance-jobber drill P2000 DIN 338, using different workpiece materials. Tool-Ø = 10 mm. Drilling depth ap = 4 x D. Coolant: 7% soluble drill. Different tool materials can achieve performance increases exceeding 200% (fig. 1.4). This extra performance is thanks to the second advantage of the wave form: the wave form on the point also has the task of grooving the chip, i.e. weakening it, and making it more susceptible to breaking. Because wave form in the flute runs at an angle of approximately 70º to the wave form on the point, it provides a shearing action on the weakened chips. Result: short chips, even in difficult-to-machine, long-chipping materials, in materials where the standard drill with its' smooth cutting edges and flutes hardly stands a chance. Just a word regarding the bronze surface color of the P2000. This is a result of a special thermal treatment and has the task of optically identifying the P2000 clearly from the performance-inefficient competitors.
Many users find the jobber drill (DIN 338) too long, for automatics, lathes and automotive body drilling or for the professional fitter we therefore supply the P2000 also in stub drill dimensions (DIN 1897) (fig. 1.5).	Fig. 1.5: Performance drill P2000, DIN 1897, Series # 2048
As this range of application predominately involves long-chipping materials and often dry machining, we coat the P2000 stub drill with our new soft integral lubricant MOVIC®. It reduces friction (see issue 22), and compensates for no or insufficient coolant. The results are shown in fig. 1.6, whereby the combined benefits of wave form and HSCO are responsible. Fig. 1.6: Tool life comparison between standard stub drill and Performance-stub drill P2000, DIN 1897, using different workpiece materials. Tool-Ø = 10 mm. Drilling depth ap = 2,5 x D. Coolant: 7% soluble oil. A frequent and justified question concerns the performance after the regrind. Indeed, no user can reproduce the wave form. You can be sure, however, that even a reground Performance drill without wave form on the point still outperforms the conventional HSS twist drill (fig. 1.7). Reason: wave form in the flute and HSCO tool material remain efficient. Fig. 1.7: Tool life comparisons between cheap HSS standard jobber drill and Performance-jobber drill P2000, DIN 338, a) brand-new and b) reground. Workpiece: 42CrMo4V (1000 N/mm2). Cutting speed vc = 18 m/min. Drilling depth ap = 3 x D. Coolant: 7 % soluble oil. The advantages of the wave form are outstanding, and it would be a pity to use it for type N drills only. Well, we have also applied it to our GT100 tool for deep holes and, as expected, it has exceeded it's well known performance capabilities (fig. 1.8). Fig. 1.8: Tool life examples for Performance-drills P1 in P2 in different materials. Tool-Ø = 8,5 mm. Drilling depth ap = 3 - 5 x D. Coolant: 7% soluble oil.
A good reason to rename it the Performance-drill P1 (fig. 1.9), the true number one amongst our high speed steel drills. Following are some of its' special design features:	Fig. 1.9: Performance-drill P1, DIN 338, avaible in 2 designs a) HSCO + TiN, Series # 2045, top, b) HSCO + MOVIC®, Series # 2044, bottom.
well-proven GT flute form, wide and open with "rolled-off" heels. Together, improving chip transportation by gaining considerably more space for chips, the P1 is therefore ideally suitable for deep holes (possible above 5 x D). web thickness is greater than normal to improve stability. concave cutting edge (fig. 1.10), a world premiere for high speed steel drills. This forces the chip to hook like the poor slave having a lashing. wave form on the point and in the flute, the same result as with P2000.
further development of web thinning form A (fig 1.10), similar to out Ratio drills with web thinning form S. This offers advantages, in particular after the repointgrinding, it is no longer necessary to correct the complete cutting lip.	Fig. 1.10: The Performance-drill P1 is produced with a shortened chisel edge and concave cutting lip.
The P1 is available in 2 designs (fig. 1.9): Series # 2045, produced in HSCO, coated with TiN. A high-performance tool suitable for the economical machining of steels (up to 1000 N/mm2), cast iron and AlSi alloys. Guhring no. 2045 has multiple application possibilities and we therefore recommend this tool for mixed machining. Series # 2044, produced in HSS, coated with MOVIC®. Especially suitable for the cost-efficient machining of soft materials with a tendency to edge build-up, such as construction steels, carbon steels (up to 800 N/mm2), and Al-alloys. If we take a closer look at the range of application of Performance-drills introduced so far, we notice that the group of high-alloyed steels is missing. The P1 puts up a good fight in this area but does not achieve fantastic results.
Fig. 1.11:Performance-drill P2, DIN 338, HSCO+MOVIC®, Series # 2046.	We have therefore developed the Performance-drill P2 especially for the machining of high-alloyed steels (up to 1000 N/mm²).
It's flute form can be described as closed and we have dispensed with a thinned chisel edge for good reasons. With these difficult-to-machine materials, chip breaking is of utmost importance - although difficult to achieve. So we decided to incorporate more than one trap into the torture-chamber of chip breaking: the wide, unshortened chisel edge compresses the chip, making it brittle, the wave form on the point grooves the brittle chip from the chisel edge and further weakens it in a longitudinal direction, the concave cutting edge hooks (see above) the chip and forces it against the flute face, the closed flute form hooks the chip even more and prohibits the chip from escaping to the outside, and if not yet broken, the wave form in the flute will break the 'back' of any tenacious chip.
Our chip-breaking traps are well-proven (fig. 1.12 and 1.13). How else can one explain the unbelievable tool life of more than 50 m for HSCO drills (fig 1.8)? However, we must not forget the contribution made by the MOVIC® coat. It ensures that the effectively broken chips don't get stuck in the flute but leave the hole on quickest way possible.	Fig. 1.12: With difficult-to-machine, high-alloyed materials, chip-breaking is of utmost importance. Standard drills produce chips up to 30 cm long (above) in this material. Performance-drills, however, magically produce far shorter chips (below), even at extreme drilling depths.
Fig. 1.13: Chip lengths produced by Performance-drill P2 under difficult conditions. Workpiece: Monel, extremely tough and long-chipping (700 N/mm²). Tool-Ø = 8,5 mm. Drilling depth ap = 12 × d. Woodpecking every 16 mm. Coolant: 7% soluble oil. Tools without a wave cut are not economical in this long-chipping material!
Your head is probably spinning after all this information. Fig. 1.14 is designed to provide you with a general summary. Type P2000 Type P2000 + TiN Type P1 + TiN Type P1 + MOVIC® Type P2 + MOVIC® Type Jobber Stub GT GT VA-Ti DIN 338 1897 338 338 338 Tool material HSCO HSCO HSCO HSS HSCO Coating bright MOVIC® TiN MOVIC® MOVIC® Application universal hand drills automatics steels, cast iron deep holes 5 x D universal deep holes 5 x D high-alloyed steels Color brown olive green golden olive green olive green Series # 2047 2048 2045 2044 2046 Ø-range [mm] 1.0-13.0 1.0-13.0 3.0-16.0 3.0-16.0 3.0-12.0 Ø-range 2049 2050 - - - Series # Sets Ø-range 1.0-13.0* 1.0-13.0* - - - Fig. 1.14: Summary of Performance-drill program and typical characteristics. *: different set combinations Further information on Performance drills

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