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 Heller Hammer Drill Bit (Made in Germany)
Continious high performance in the hardest concrete! 
Drills for construction Professionals!

Product safety and user protection are of paramount importance to Heller. This maxim is expressed by the quality and utmost reliability of products for practical drilling. Heller emphasises the convincing quality of its products under the label "Quality for Professionals".

The certified and externally monitored manufacturing process ensures adherence to the most stringent safety requirements. The exclusive use of selected high-grade steel and tungsten carbide, coordinated with highly automated, computer-controlled production plants ensures the highest technological standard and highest service life of Heller drills. 


PGM - Certified Safety

Certified & safe with PGM seal

Heller's products can display the certificate of the independent Prüfgemeinschaft Mauerbohrer e.V. (PGM - Masonry Drill Bit Testing Association), which defines the highest requirements for a safe drill hole – anchor combination. The PGM uses monitoring and testing procedures to ensure that users are only offered drills which are coordinated for use with approved anchors. Only a few authorised dealers worldwide are entitled to exhibit this seal, which every user of hammer or percussion drills has undoubtedly seen before. Drills with this symbol uphold what many others promise: Geometrically accurate holes that offer maximum purchase of the anchor and maximum safety for the user.

What is PGM?

Any user of hammer drill bits should know this seal.

Similar to the German TÜV badge which stands for safety of an automobile, the PGM-mark on the hammer drill bit guarantees a high-quality product manufactured under controlled and certified conditions.

Hammer drill bits bearing this mark keep the promise which others only claim to offer: Geometrically exact holes giving a firm support to the anchor fixing and maximum safety to the user. The Deutsches Institut für Bautechnik (DIBt), responsible for the Technical Approval of anchors, prescribes the use of hammer drills bits only with the PGM-mark.

Otherwise an individual and costly test is required for the respective bit.

You should be aware: The use of poor hammer drill bits without PGM-mark, which do not come up to the parameters of the DIBt, could be responsible for the failure of anchor fixings, particularly in safety critical applications.

Protect yourself against possible problems and claims for compensation which could result from the product liability law. In the event of a claim also the distributor could be held responsible, if the manufacturer of importer of a poor hammer drill bit without PGM-mark can not be identified.

Only 14 manufacturers world-wide are authorized to label their products with this mark. Heller is approved with either the number “46”, “56” or “58”.

The PGM-mark guarantees:

  • Excellent hammer drill bits  
  • Exact drill holes  
  • Stable anchor fixings  


Optimal Low Vibration Spiral Design

User-protection through vibration monitoring

Heller is the first manufacturer specialising exclusively in drill bits to test its products in an independent institute for the adverse effects of drilling vibration. If a rotary hammer is integral to the application, it can be expected that so-called “hand-arm vibration” could have some form of long term effect on the users health. The “EU Vibration Directive 2002/44/EC” aims to help, in that it stipulates the maximum vibration to which users may be exposed. Low-vibration power tools are called for in addition to low-vibration techniques – but low-quality drill bits can also have an adverse effect. Low cost, poorly designed drill bits can reserve the effect of low vibration power tools. Heller drill bits demonstrated optimal effectiveness and extremely low vibration in the practical tests. In fact, they even distinctly reduced vibration.

What is hand-arm vibration?
Hand-arm vibration is vibration transmitted from work processes into workers’ hands and arms. It can be caused by operating hand-held power tools, such as road breakers, and hand-guided equipment, such as powered lawnmowers, or by holding materials being processed by machines, such as pedestal grinders.

The EU has installed some new regulations for end user protection – especially on the topic of hand-arm vibration, which has caused some specific reactions in different countries so far:

European Regulation:

The Council of Ministers and the European Parliament adopted a joint text for a Physical Agents
(Vibration) Directive regarding exposure of workers to the risks arising from vibration on 21 May 2002.

The Directive was published as Directive 2002/44/EC on the minimum health and safety requirements regarding the exposure of workers to the risks arising from vibration and has now come into force. Member States have to implement the Directive.

What kinds of tools and equipment can cause ill health from vibration?

There are hundreds of different types of hand-held power tools and equipment which can cause ill health from vibration. Some of the more common ones are:

  • hammer drills;  
  • concrete breakers/road breakers;  
  • cut-off saws (for stone etc);  
  • hand-held grinders;  
  • jigsaws;  
  • power hammers and chisels etc.  

What are the early symptoms?

Identifying signs and symptoms at an early stage is important. It will allow the employer, to take action to prevent the health effects from becoming serious for the employee. The symptoms include any combination of:

  • tingling and numbness in the fingers;  
  • not being able to feel things properly;  
  • loss of strength in the hands;  
  • the fingers going white (blanching) and  
  • becoming red and painful on recovery (particularly in the cold and wet, and probably only in the tips at first).  

For some people, symptoms may appear after only a few months of exposure, but for others they may take a few years. They are likely to get worse with continued exposure to vibration and may become permanent.


Dura TEC


  • Duratec hardening for stable drill geometry  
  • Comfortable and powerful operation  
  • Convincing practical drilling performance  



Control & reliability with the Heller quality seal

Product safety and user protection are paramount at Heller.These policies translate to high-quality products that are absolutely reliable in use. The “Quality for Professionals” label is Heller’s hallmark of superior product quality. The certified and externally monitored manufacturing process means that products meet stringent safety requirements.The use of only select highquality steels and tungsten carbide inserts, customised on highly automated, computer-controlled systems, guarantees that Heller drill bits conform to the state of the art and have the maximum service life.



Tungsten carbide cutting edges

Tungsten carbide cutting edges
The innovative, patented Heller tungsten carbide cutting edges are optimised for the toughest applications in concrete & stone. Even concrete reinforcements pose no problem for the uncompromising tungsten carbide cutting edges. A cutting tungsten carbide profile and additional grinding areas make for extremely fast advance. The integrated protruding tips ensure ideal starting and perfect centering.

Milling technique

Milling technique
The spirals are manufactured using the grinding or milling technique. They are ground from the whole piece. This ensures accuracy of the spiral line. The spiral outside and inside diameter are adhered to exactly. The advantages in use are quieter operation and continuous removal of dust.

Spiral forms

Spiral forms
Patented spiral forms guarantee – for example, by means of an alternatively narrow and wide back edge – optimum removal of dust without any blow-outs. Extremely high speed with ideal transmission of impact energy thanks to computer-aided design. In addition, Heller hammer bits are outstanding for quiet, low-vibration operation.

HST Hardening

HST Hardening
The special technique of hardening by blasting makes for the perfect surface finish: the probability that a Heller hammer bit will break under very high loads is extremely low – even on impact with reinforcements. Ideal, especially with long dimensions: HST hardening guarantees high bending flexibility without breaking.

True-running test

True-running test
Every Heller drill bit is subjected to a strict true-running test at the end of production. In the event of deviations from the setpoint, the hammer bits are adjusted to the correct measurement. Computer-controlled sensors detect deviations to the micrometre. Special rams then bring the bit into the exact true-running range. The advantages for the user are greater precision of diameter and depth of the drill hole and less vibration during work.


Use of hammer bits


Use of hammer bits
Hammer bits are recommended for drilling holes in brickwork and concrete with fast and reliable results. For the proper installation of components, it is necessary to use drill bits from a certified manufacturer. Using drill bits from monitored production is the only way to guarantee that the bore area will not be exceeded and that consistently good results will be achieved. Bits with too much true-running deviation or too high tolerances in the tungsten carbide tip can result in drill holes with not enough grip, for instance, for an anchor. In extreme cases, the installed elements will become loose and cause severe damage. It is therefore recommended that you only use drill bits that have been manufactured in accordance with the guidelines of the Prüfgemeinschaft Mauerbohrer (PGM), an independent institute. You can recognise this by the PGM quality mark. 


Checking for reinforcements


Checking for reinforcements
Heller hammer bits can even withstand impacts with reinforcements. But we recommend you use a detector to check the wall for reinforcements before beginning to drill and only to drill holes in the pure masonry. Reinforcements are there for structural reasons and should not be cut if at all possible. If this cannot be avoided for design reasons, a structural engineer must be consulted beforehand.

Checking for pipes & cables

Checking for pipes & cables
We advise you to check the area around the drill hole for pipes and cables before starting to drill. Cables and pipes usually run up or down perpendicular to the socket or fitting. For that reason, we recommend you do not drill directly above or below a socket or fitting. In the case of through-drilling, you should check the structure of the opposite side of the wall. It is essential to use special detectors.

Greasing the adapter

Greasing the adapter
We recommend you lubricate the shank end of the drill bit with thread grease before attaching it to the drill chuck. This will extend the service life of the hammer drill.

Removing material residue

Removing material residue
Before installing an anchor, it is essential to remove material residue from the drill hole to ensure optimum grip for the anchor.


SDS adapter


SDS adapter
The SDS adapter is available in various designs for power drills. Made to fit the different bit diameters, there is the most popular SDS-plus adapter with a crosssection of approx. 10 mm and the SDS-max adapter with a cross-section of approx. 18 mm. The SDS adapter general has two functions: Locking: The bit/chisel locks by means of opposite recesses running lengthwise in the tool, into each of which a ball, integrated in the drill chuck, engages. Torque: The torque is transmitted via grooves in the bit/chisel, in which lengthwise ridges in the drill chuck engage. With axial transmission of the hammer percussion, the balls descend and the ridges slide into the grooves.


Drills with a spline adapter are also used. These facilitate drill holes within a diameter range of approx. 12 mm to 38 mm.




Minimum lifetime expectation in drilling meters:

Minimum lifetime expectation in drilling meters

Claims Check List:

Quality Standard Guideline


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