GUHRING INDIA - THE TOOL COMPANY - Rotating Cutting Tools

Guhring’s reamer range includes HSS-E and carbide NC reamers that are especially suitable for the application in shrink fit or hydraulic chucks thanks to an h6 shank. This combination offers the highest concentricity and process reliability for the production of fits.

In addition, Guhring has, for the first time, included HSS-E reamers with internal cooling in the standard range. For the user this does not only mean a longer tool life and an optimised swarf evacuation from the hole. Thanks to the inclusion of tools with internal cooling in the standard range, the user benefits above all from considerable cost advantages in comparison to the special solutions previously necessary.

Guhring’s reamer and countersink program also includes carbide tools with A-coating (TiAlN), permitting higher cutting speeds and feed rates in certain applications compared to bright and TiN-coated tools.

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Taps

Guhring’s current tap program includes tools for most application tasks in a variety of materials, for different thread types as well as depths up 3 x D and naturally for the production of threads in blind as well as through holes. The special geometries and the application orientated tap coatings as well as tools with or without flutes or with or without internal cooling respectively provide a tool selection that is equal to almost any application task. The Guhring tap program also covers special applications. For example, a solid carbide TiCN-coated tap allows the production of threads in hardened steels. For the production of threads in magnesium and magnesium-alloys a TiAlN and MolyGlide coated HSS-E tap, for example, achieves excellent results. In addition, there are tools available for HPC (High Performance Cutting) and minimal lubrication applications. Click here to request a catalogue.

Fluteless Taps
"Profile" - Guhring's new fluteless tap generation
Conventional fluteless taps, produced by a grinding process only, show traces of microscopic, very fine grinding marks on the surface of the tool. This also applies to the threaded protion of the tool required to perform the thread forming operation. This surface topography has a negative effect on the friction between the tool and the material to be re-formed as well as on the herewith associated heat development, on the necessary torque and last but not least on the wear of the pressure points of the fluteless tap. In addition, the "grinding marks" encourage the buildup of the material to be re-formed in the thread flanks of the fluteless tap. This is also called cold welding. Thanks to a special process to improve the surface topography, Guhring's new Profile fluteless taps no longer possess these "grinding marks". This has been confirmed in research and tool life studies in varying materials under production conditions. For the user, a longer tool life and increased cutting speeds are the benfits of this special process. The tool life can be increased considerably depending on the material to be machined and the application conditions. A 100% increase in tool life is not unusual. The improved surface topography is not only of benefit to tools with bright finish. Particularly coated tools also benefit from the new process.

Thread Milling Cutter
Thread production
With conventional thread cutting the thread is produced from the image of the tool profile, conditional on the chamfer lead for the workpiece. In contrast, with thread milling the thread is produced via a series of cutting paths by the milling cutter, whereby the pitch is realised by the machine. The thread mill makes numerous pases through the axis section of a thread during a spiral motion in axial tool-workpiece direction and thereby interpolates the contour of the thread.
TMC thread milling cutter
This thread milling cutter can produce different threads with countersinking chamfer and identical pitch.
TMU universal thread milling cutter
Due to the recess behind the cutting section this tool can produce, via a second milling cycle, a thread deeper than the overall length of the cutting section.
Special thread milling cutters
Trust our competence. We develop and produce thread milling cutters according to your need and requirements. With Guhring quality. Click here to request a catalogue.

The New Milling Cutter Activities
With the new, innovative milling cutter range, Guhring has established a strong basis in order to intensify its activities in this rotary cutting tool sector. Guhring has invested in excess of 10 million euros in two production facilities located in Germany and abroad. A re-structured program, including many new tools from our own development and production, has provided the right foundation for Guhring to further improve its market position. The program includes milling cutters for every cutting task, the tools are also very convincing with regard to quality, performance and cost. Click here to request a catalogue.

Solid Carbide Milling Cutters
In order to satisfy the highest demands, Guhring provides a comprehensive range of solid carbide milling cutters. The advantages: - Carbide and coatings from Guhring's own production provide the highest quality - Optimal cost-performance ratio thanks to a cost efficient production on state-of-the art machines - Exceptional machining results thanks to innovative geometries - Problem-free re-grinding and re-coating using original geometries and coatings

Our Ratio Milling Cutters: Solid Carbide RF100 and PM HSS-E RF40
We have developed the Ratio milling cutters with unequal spiral angle predominantly to eliminate chattering and the so-called cork screw effect (as found when withdrawing tools having a large spiral angle). However, the unequal spiral angle does not only eliminate the two unwanted effects but also offers further advantages: - up to 60% higher feed rates - increased tool life - increase in cutting depth - vibration-free application - suitable for roughing and finishing operations - improved surface quality - reduced wander of milling cutter

High Speed Steel Milling Cutters
Our comprehensive high speed steel milling cutter range provides cost-efficient solutions for a multiplicity of machining tasks. The advantages: - An application orientated selection of M42, HSS, PM HSS-E and HSCO tools - Especially good cost-performance ratio thanks to state-of-the art production facilities - Optimised geometries for long toll life, high cutting speed and outstanding machining results Click here to request a catalogue.

For the last twenty years, Guhring has been dedicated to the subject of "deep hole drilling". The experiences gained have subsequently always been invested in more advanced products. Many take part in Guhring's progress: The R&D centre, which sets new standards with up-to-date cutting technology, the carbide production thar continuously adapts improved substrates to the increasing requirements and the coating technology department which is responsible for finely synchronising the design of the tool and the coating process. Click here to request a catalogue.

EB 800 - gun drill with interchangeable insert
- The precision interchangeable inserts and supporting strips eliminate complicated adjustments - The precision supporting strips are produced in Guhring carbide for your individual deep drilling task. They can be reverse-fitted, providing double tool life. In addition, they can be provided with any of the Guhring coatings. - Thanks to the precision insert seatings and the interchangeable inserts there is only a small number of interchangeable components. The tool is therefore extremely rigid. - Expensive stoppages are eliminated because the worn components can be replaced without removing the tool from the machine. - The expensive re-grinding process is eliminated thanks to the interchangeable insert technology - The application orientated selection of the most suitable interchangeable insert always ensures optimal chip breaking - even in problematic materials - Specifically optimised to your individual deep drilling task, the precision interchangeable inserts are also produced in Guhring carbide. In addition, all Guhring coatings are available - Within the diameter range it is possible to modify the nominal diameter at any time by simply interchanging the individual components - The driver is produced in heat-treatable steel to: DIN 6535 HA, DIN 6535 HB, DIN 6535 HE, DIN 1835 E . All the forms generally required for deep drilling machines are possible - The interchangeable component technology for inserts and supporting strips makes any combination of carbide grade and coating possible

EB 100
Since the introduction of the EB 100 ex-stock range in 2000, Guhring has successfully broken the rule that gun drills are special tools. This success gave us the incentive to expand the range considerably and be able to provide our costumers with a greater choice of gun drills from stock. The expansion of the program is two-fold: - in the existing EB 100 ex-stock range, Guhring no. 5020 and 5021, the diameter range for the standard tools has been extended from 1,5 up to 4,0 mm to 1,2 up to 5,0 mm - In addition, new single-fluted gun drills type EB 100 with flute lengths of 45 and 120 mm, with the Guhring no. 5024 and 5026, have been included in the ex-stock range All single-fluted gun drills EB 100 in the ex-stock range are supplied with a bright surface finish and with head form G as well as standard point geometry. The driver complies with DIN 6535 HA. Herewith, the tools cover a mulititude of gun drill applications in awide range of materials. In addition, HB or HE shank designs can be supplied with short notice within 10 days. We can naturally also produce any required gun drill as a special tool.

EB 80
The world's first ex-stock range of brazed single-fluted deep hole gun drills with solid carbide head. Deep hole drilling has become a standard machining operation. The advantages: - single fluted gun drills from diameter 1,5 to 12 mm - drilling depth up to 80 x D - TIN-coated and chipbreakers as standard design without surcharge - very favourable prices even for small volume orders - highest precision - in addition: a sensational price-performance ratio All types have a solid carbide head with the carbide grade K15 and are TIN-coated. Therefore, the single-fluted gun drills are especially suitable for demanding tasks such as the drilling of tool steels using soluble oil as coolant, but can naturally also be applied for other materials such as aluminium or cast iron. The point geometry guarantees successful application even under less than optimal conditions thanks to axial chip breakers and enlarged coolant chamber. The driver is produced to DIN 6535 HA. Subsequently, single-fluted gun drills can be applied with hydraulic chucks or sealed collet holders. In addition, modification to Weldon or whistle-notch is possible.

ZB 80
Suitable for cast iron, aluminium and short-chipping non-ferrous metals, from 6,0 - 27,0 diameter, max. total length 1000 mm. The main advantage of two-fluted gun drills compared to single-fluted gun drills is the substantially higher feed rate that can be applied during the production of the hole. This is due to the design of the two-fluted gun drill, it has two cutting edges and two flutes. Holes can therefore be produced considerably faster. However, this increase in machining speed is combined with a reduction in hole accuracy. This is also a direct consequence of a drill design with two cutting edges. As the cutting edges are positioned opposite each other, there is less of a smoothing effect and less support in comparison to a single-fluted gun drill. For drilling dephts < 10 x D we recommend our Ratio drill RT 150 GG, available ex stock and more cost-effective for these drilling dephts than brazed gun drills. In addition, RT 150 GG does not require a pilot hole in most applications. Click here to request a catalogue.

The Upper Class
Innovative tools for the smallest holes in steel, cast iron and aluminium - elliptical-shaped coolant holes - ground 'honed' cutting edge - from 0,8 mm diameter - for drilling dephts up to 20xD Click here to request a catalogue.

Guhring's ExclusiveLine offers an innovative solution for the efficient high performance machining of small and deep holes. The range includes three different types of carbide drill and is available SuperA-coated, they are all optimised for specific machining tasks: - the very latest in the world market are the straight-fluted drills for the diameters from 1,5 to 6,0 mm with elliptical-shaped coolant ducts. They are especially suitable for the machining of non- ferrous metals and cast materials up to hole depht of 10 x D for standard range tools and up to 20 x D for special tools. - new in European market is atwist drill with conventional coolant ducts for drilling dephts up 4 x D and 7 x D, also in the diameter range from 1,5 to 6,0 mm. Its range of application is predominantly the machining of steel. - a twist drill in the diameter range from 0,8 to 3,0 mm and for drilling dephts up to 4 x D as well as 7 x D without internal cooling rounds off the range. The drill is also extremely suitable for the machining of steel.

World Innovation: elliptical-shaped coolant ducts
The very latest innovation and a speciality are the elliptical-shaped coolant ducts of the straight-fluted ExclusiveLine drill range. They enable the enlargement of the coolant duct cross section whilst retaining the wall thickness of the drill in the flute area. Subsequently, they allow the application of efficient coolant ducts even with the smallest of diameters. For the maching process it means highest rigidity, at the same time the elliptical coolant ducts can reach cross sections that - dependent on the tool diameter - are up to 100 percent larger than conventional coolant ducts in tools of the same diameter. The customer gains a considerable improvement in process reliability and a distinctly longer tool life. The results of extensive drilling tests substantiate this.

Twist drills with and without internal coolant for steel machining
Guhring's new ExclusiveLine twist drills with internal cooling enable the high performance machining of steel. The 4-facet point grind and the ground 'honed' cutting edge process ensure high cutting rates as well as optimal chip breaking. The special flute profile provides a problem free evacuation of the swarf from the hole.
At the twist drills with internal coolant of the ExclusiveLine the coolant ducts and the flute geometryare optimally adapted to one another. Subsequently, the tool is extremely rigid but at the same time provides a high coolant flow rate. Subsequently, the twist drills also guarantee highest economic efficiency and process reliability for the production of small diameter holes in steel.

Straight-fluted drills with elliptical-shaped coolant ducts for aluminium and cast iron
The straight-fluted drills of Guhring's new ExclusiveLine enable high performance machining of aluminium and cast materials. The elliptical-form coolant ducts give the tool extremely high rigidity and at the same time an optimal coolant flow rate. The 4-facet point grind ensures high cutting rates as well as optimal chip breaking. The special flute profile provides a problem free evacuation of the swarf from the hole. Subsequently, the straight-fluted drill guarantees highest economic efficiency and process reliability for the production of small diameter holes. Click here to request a catalogue.

The interchangeable insert drilling system incorporating up-to-date clamping techniques
The new T 800 WP interchangeable drilling system provides an efficient and quality ensured solution for the production of holes up to a maximum diameter of 102mm! The system, consisting of the types HT 800, RT 800, LT 800 and GT 800, is not only suitable for the precise production of large holes but also achieves excellent results in the production of deep holes up to max. 15 x D, especially in steel, cast materials and Al-alloys. The interchangeable inserts are produced in ultra fine carbide, type GT 800 inserts only in PM HSS-E. There is a choice of bright surface finish or the coatings TiN or FIRE. Re-grinding is no longer necessary due to the low cost insert (throw away design). A new feature is the clamping method for the interchangeable insert. It provides excellent transmission of power and acurate positioning. The design allows the inserts to be replaced quickly and without complication even when in the clamped position on the machine. This reduces stoppages. The self-centering, double-edged Ratio drill geometry gives the T 800 WP tool family superiority over standard conventional interchangeable insert drills. The task of drilling in multiple sheets is efficiently accomplished by all T 800 WP types. And if there are any problems, we won't leave you out on a limb. We don't just supply, we advises, provide application assistance and accompany the tool for its entire life. Click here to request a catalogue.

Type HT 800 WP
Our recommendation for the diameter range 11,5 to 25,99 mm. The nickel-plated holder is equipped with coolant ducts, the interchangeable inserts are produced in ultra fine grain carbide. However, we regard the new and patent applied for interchangeable clamping method as the highlight of type HT 800.

Type RT 800 WP
If you predominantly produce deep holes in the diameter range 16,0 to 40,5 mm, you should take a closer look at type RT 800 WP. The holder is nickel-plated with coolant ducts, the interchangeable inserts are produced in ultra fine grain carbide. Type RT 800 WP offers exceptional performance, especially compared to brazed carbide tools. With regard to accuracy and surface quality of the hole the T 800 WP drilling system offers outstanding efficiency.

Type LT 800 WP
Until recently, the economical production of deep and especially large holes above 40 mm diameter with carbide tools was only achievable with the assistance of costly special solutions. The successful development LT 800 WP now provides a modular and therefore cost-effective solution for this difficult area of machining. This amazingly for up to 102 mm diameter and 1000mm drilling depth! The holder is equipped with coolant ducts, the interchangeable inserts are produced in ultra fine grain carbide. The LT 800 WP is ideally suited as a core drill for the enlarging of drilled holes. Also remarkable is the fact that, depending on diameter, holes up to 15 x D can be produced, i.e. gun drilling.

Type GT 800 WP
Drilling tools with carbide indexable inserts have been around for a long time. They have a niche in the market. On the other hand, drills with high speed steel interchangeable inserts have so far not achieved any considerable cost advantages in comparison to corresponding high speed steel drills. Now there is a solution: the twin-edged disposable insert in sintered PM HSS-E from 16,0 to 25,5 mm diameter. It provides the possibility of considerable cost-savings in machining areas where until now conventional high speed drills have been applied. Interesting for changing machining tasks: the interchangeable inserts are compatible and can be applied in type RT 800 WP holders. Similarly carbide interchangeable inserts can be applied on GT 800 holders. Click here to request a catalogue.

Ratio Drills
Type RT 100 U
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 app. 1200 N/mm², including carbon steels, bronze, cast iron and high-alloyed AlSi-alloys. 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 and web thinning. Click here to request a catalogue.

Type RT 150 GG
For the drilling of short-chipping materials such as cast iron, grey cast iron, spheroidal graphite and malleable cast iron. Al-alloys with high Si content. For the production of holes with high alignment accuracy (minimal deviation from straightness). The tools have extremely good self-centering qualities, achieve hole tolerances to H7 and produce an excellent surface finish. High cutting rates offer high productivity.

Type RT 100 12 x D
A high performance solid carbide drill for the efficient production of deep holes in steel, cast iron and non-ferrous metals. Excellent self-centering qualities thanks to special point grind. Provides safe chip flow even with tough and long-chipping materials due to adapted drill profile and large flute space. Double margins for excellent hole alignment and with good surface qualities and optimal support of the tool during withdrawal.

3-fluted Ratio Drills
Type FT 200
A tool for drilling from the solid, achieving holes with excellent positional and form accuracy. Dimensional accuracy and surface finish correspond to those achieved with core drills. Centering or spotting is not normally required. Suitable for drilling cast iron and long-chipping Al-alloys. The 3-fluted FT 200 enables very high feed rates and optimal centering for the machining of cast iron and aluminium. The open flute form in conjunction with the short compact design, as well as our ultra fine carbide grade achieve maximum process reliability and enable applications under the most difficult of conditions, as for example oblique entry or interrupted drilling.

Solid Carbide Twist Drills
Type N
The tools are especially suitable for drilling cast steels, grey cast iron, chilled cast iron, austenitic manganese steels, bronzes, light metals and nonferrous metals. Furthermore suitable for the economic machining of abrasive materials (AlSi-alloys), fibre-reinforced plastics and other Duroplastics liable to cause severe abrasion on cutting lips and lands. The extremely rigid, extra short SL twist drill (Guhring no. 5516) is furthermore especially recommend for the application on CNC machines and capstan lathes.

High Speed Steel Twist Drills
Type GU 500 DZ
For all those multiple machining tasks generally requiring the application of different drills, Guhring has introduced a universal drill, GU 500. GU 500 is suitable for the machining of non-ferrrous metals, structural steels and carbon steels, highalloyed steels, cast iron and cast alloys, plastics as well as alu-minium.

Type GT 500 DZ
The new GT 500 has been especially designed for the machining of high tensile steels and is produced in highly efficient PM-steel. By combining the advantages of high speed steel drills with those of solid carbide drills, it closes the gap that has existed for the machining of medium tensile steels and medium batch sizes. Click here to request a catalogue.