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PRESTO SM200 Parabolic Flute (Worm Pattern) TiN-Hi-Tech drills are designed with high helix angles for re-moving an increased volume of swarf, ensuring higher speeds and feeds to be achieved. A competitive priced versatile range which can update your production methods from standard high speed steel drills and ensure swarf control over other TiN coated drills and can challenge carbide tooling with its flexibility, depth cutting ability and where the short run variation of the application cannot justify the carbide cost and invesment. The special design flute formation dispenses chips rapidly away from the cutting edges enabling an increased volume of coolant flow. Cutting friction and chip welding is substantially reduced and deeper penetration with a single drill pass can be achieved with substantial reduction in peck feeding. The range can equally be applied to conventional machines dedicated machines, and when included in a CNC tooing package can be the most versatile of all drills giving -
Standard in PVD Titanium Nitride (TiN) coating or bright finish on request. |
| Giving a family of drill length in the Hi-Tech Range | SM200 Since the introduction of the highly successful TiN coated 8% cobalt steel parabolic flute drills in JOBBER, LONG SERIES and STUB LENGTH, PRESTO have now extended the STUB LENGTH drill range to include fractional sizes. |
| Offered
in a range of 3mm to 20mm Fractional sizes 1/8" to 3/4" |
STUB LENGTH drills with swarf control of the parabolic flute may seem as being unnecessary, but even in relatively short holes swarf can be a problem, any effort by the production engineer to overcome this usually implies slowing down the operation. Often the use of a carbide stub drill is an alternative to the standard stub, but the slow spiral gives poor swarf control, the use of cobalt stub is another alternative, in this instance we have used the 8% cobalt as the basis for our drill, not the 5% used by many of our competitors. European practice shows that as many stub drills are used as Jobber length with the short rigid drill giving a better more predictable performance. |
| Offered
in a range of 3mm to 13mm Fractional sizes 1/8" to 1/2" |
JOBBER LENGTH drills the same 8% Cobalt Parabolic flute configuration was our first venture into the hi-tech drill market, where we have achieved rermarkable results especially in the horizontal spindle machining centres, where the parabolic flute helps pump away the swarf traditional flutes leave behind. This does not detract in any way the superior performance in the vertical mode. Intended for an initial depth of 6 times diameter without the need to peck. The heavy duty web with a 135° split point gives better hole position and less run-off when drilling deep holes. |
| Offered
in a range of 3mm to 13mm Fractional sizes 1/8" to 1/2" |
LONG SERIES drills have the advantage of reach and deep hole applications, giving improved performance over the traditional drill of better than double the penetration rates. The parabolic flute construction provides good swarf control and the heavy parallel core gives maximum rigidity but still maintains good swarf space. SM200 is easilythe best performer at depth. The benefits of the heavy web and 135° split point are even more pronounced on the deep hole application of the long series dril. |
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TIN Titanium
Nitride Since its introduction TiN coating has been substantially improved and is now regarded as an effective general purpose coating favoured for drilling. Being of 300HV high hardness to resist wear by either pick up or erosion of metal to metal wear, high abrasive resistance and low coefficient of friction reducing torque requirements. The improved chip flow and surface finish also enhances the size of hole drilled. Speed can be generally increased by 1.6 times. It has the very distinctive gold coloration. |
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TiCN Titanium
Carbonitride The improved or second generation TiCN we now supply is of a very high hardness, 4,000HV is achieved by alternate layers of TiN and TiCN. The multi-layer coating has a lower coefficient of frictin and has better resistance to wear and shock loadings, but will not work with high temperatures as can be achieved with TiN. It has become the preferred coating for milling cuttersbut can offer additional wear resistance on tapping. Speed can be 1.8 to 2.2 times and feed per tooth increased by 5%-10%. The blue, deep grey finish, is produced in the process of coating. |
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Al-TiN
Aluminum Titanium Nitride Al-TiN coating is a multi-layered coating intended primarily for milling cutters. It has a higher hardness than TiCN at 45,500HV, but has a ductility on the coating equal to TiN which is eminently suitable for milling. Its outstanding feature is the highest resistance to oxidisation which allows the tools to be used without coolant. The coating acts as a heat shield for the HSSE substrate and survives higher temperatures than any other PVD coating and will run at 2.5 to 3 times the normal speed with 10% extra tooth loading. Enhanced performance can be achieved using coolant. Colour - Black |
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