Gun Drills

For every task a suitable drill

For a diameter-length-ratio  from 15xD one generally refers to gun drilling. Gun drills are for example applied for the machining of camshafts, crankshafts, drive shafts, injectors, drill pipes for oil production, in the medical and the food industry. Dependent on the requirements of the hole, the machine conditions, the batch size and the drilling depth Guhring determines the most economically efficient tool option.

Single-fluted gun drill 

Single-fluted gun drill EB80: Conventional
Single-fluted gun drill EB80: Conventional

- Single-fluted gun drill with brazed carbide head
- Total length up to 3000.00 mm
- Nom.-Ø 2.00 – 40.00 mm
- Large variety of options, i.e. ball nosed or step drill
- suitable for most materials

Single-fluted gun drill EB80 II: Conventional
Single-fluted gun drill EB80 II: Conventional

- Available ex-stock within 24 hours
- Total length 1100 mm for all current gun drill machines
- Driver D25x70mm for all current gun drill machines
- Carbide grade K15 (DK105) suitable for optimal tool life with all materials
- Head form G for maximum precision
- TiN-coated for good tool life and difficult materials
- Polished flute for optimal chip evacuation
Single-fluted gun drill EB100: Smallest
Single-fluted gun drill EB100: Smallest

- Single-fluted gun drill especially for close drilling tolerances
- can be manufactured from 0.9 mm nom.-Ø
- Nom.-Ø up to 16.00 mm
- Flute length up to 500.00 mm
- up to 80xD with only one tool
- suitable for most materials
Single-fluted gun drill EB800: Flexible
Single-fluted gun drill EB800: Flexible

- Single-fluted gun drills with interchangeable inserts and interchangeable guide pads
- Nom.-Ø 12.00 to 52.00 mm
- conversion possible by 0.5 mm per basic body range
- any combination of carbide grade and coating possible
- suitable for most materials
Single-fluted gun drill EB100: Smallest
Single-fluted gun drill EB100: Smallest

- Two-fluted gun drill with brazed carbide head
- Nom.-Ø 6.00 to 30.00 mm
- perfect for GG25, GGG40, GGV
- extremely large coolant ducts
- optimised point geometry

Solid carbide spiral fluted deep hole drill


With spiral deep hole drills type RT 100 T available as part of an extended ex-stock programme for the drilling depths 15xD,  20xD, 25xD, 30xD and 40xD, the user benefits from maximum feed rates and cutting speeds and therefore benefits from a significant reduction in manufacturing times. Guhring achieves these advantages thanks to the following features:

  • Optimised flute cross-section 
    Die spiralisierten Tieflochbohrer verfügen über eine auf die besonderen Anforderungen speziell angepasste Nutgeometrie für einen optimalen  Spantransport aus tiefen Bohrungen. 

  • Maximum coolant duct cross-section 
    To optimally supply the cutting edge with lubricant, the tools possess coolant ducts with maximum cross-section. This ensures an effective lubricant supply to the cutting edge and excellent chip evacuation. 

  • Problem-free chips 
    The aforementioned factors in combination with the perfectly adapted cutting parameters to suit the application result in chips that are evacuated problem-free even from deep holes. Therefore, chip congestion and the herewith combined jamming of the tool is effectively prevented.

  • Wear resistant cutting edges  
    Thanks to the head coating with Guhring’s A-coating (TiAlN) the heavily stressed cutting edge area is effectively protected against wear.

  • HA shank for accurate clamping
    For clamping with hydraulic chucks from Guhring’s GM 300 programme the RT 100 T ex-stock range is equipped with a HA shank, shank tolerance h6. The combination of RT 100 T and hydraulic chuck guarantees maximum concentricity, extreme clamping force, minimal imbalance and optimal economic efficiency.

  • Intermediate dimensions & special lengths
    In addition to the ex-stock programme ensures Guhring continues to provide RT 100 T as a special tool to customer requirements. We provide intermediate dimensions for the ex-stock range with a maximum drilling depth up to 40 x D / a maximum total length up to 400 mm.

  • MQL suitable
    Thanks to the modification of the shank to the for MQL machining optimised shank end the ex-stock tools are also optimally suited for MQL machining.
Flute geometry for optimal chip evacuation
Maximum coolant duct cross-section
Problem-free chips

GT 2000

HSS-E-PM gun drills

Drilling depths up to 20xD without pecking cycles

  • Special programme
  • Ø 3.00 -12.00 mm
  • up to 20xD drilling depth
  • new parabolic flute geometry for optimal chip evacuation
  • especially suitable for the machining of steel
  • The TiAlN-based head coating ensures a high wear resistance of the stressed cutting edge of the tool during heavy machining.

Point grind

Optimal wear resistance and excellent cutting conditions with deep holes thanks to the newly developed point geometry with optimised S web thinning.

Flute form

A specially developed parabolic flute form with optimised surface finish quality ensures optimal chip formation and chip evacuation.

High surface finish quality

Thanks to the bright flute with high surface finish quality the chips are optimally evacuated.

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Guhring KG
Herderstraße 50 - 54
D-72458 Albstadt

Phone +49 7431 17 0
Fax +49 7431 17 21279

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