Replaceable Head Drilling

Cutting Tools

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Drilling

Replaceable Head Drill Spares & Accessories

Dormer

Features & Benefits
Material
Replaceable heads in tough micrograin carbide and hardened steel body with high gloss nickel plating for high resistance to wear and corrosion. One body accommodates multiple head sizes with no compromise on tool rigidity and structural integrity.
Surface Treatment
Titanium aluminium nitride based coating on the drilling heads for high toughness and oxidation stability - enables high speeds and feeds and resists 'built-up edge' which is common when machining softer materials.
Point Geometry
The self-centring 140 four facet split point geometry ensures that required thrust force is low. Predrilling/centre drilling is neither necessary nor recommended.
Shank
Cylindrical shank with flat for multi-purpose tool holding. Allows accurate clamping for reliable use of internal coolant. Best results are obtained using hydraulic holders such as the Dormer Hydro-Grip; can also be held in ER type and Weldon type toolholders.
Geometry
Heads are held securely in place by two screws; the perfect fit of body and head serrations transmits the torque evenly and allows for precise and easy assembly. The slow spiral offers optimised flute volume for efficient chip evacuation.
Internal Coolant
Coolant holes in the drill bodies are aligned perfectly with the replacable heads for efficient delivery of coolant directly to the cutting edge. This not only disperses the heat generated during the hole making process when using high speeds and feeds, but also ensures smooth chip evacuation and long tool life.
Hole Depth
Drilling depths of 3 X Diameter, 5 X Diameter shank styles available for the entire range of sizes and 8 X Diameter available on diameters 13.5mm and larger.
Range
Metric head sizes available from 12.0 - 30.5mm diameter and fractional sizes from 15/32" - 13/16" diameter.
Customer Benefits
* High productivity across a wide range of materials, including carbon and alloy steels, stainless steel, titanium, nickel and cast iron. 
* Two head types available - the Hydra-M head has been developed specifically to give optimum performance in stainless steel and cast iron. The Hydra-P head is recommended for steels.
* Consistently high performance, even after numerous head changes.
* Reduction in inventory costs. One drill body fits multiple head sizes.
* Easy and quick head changes with minimal interruptions to the production process. Headscan be changed without removing the body from the machine.
* Exact fit of head to body maximises tool rigidity for superior hole accuracy and precise tolerances.
* Shank design allows for versatile tool holding.
* A choice of drilling depths, up to 8 X Diameter. Internal coolant channels provide optimised coolant direction and pressure to give efficient chip evacuation and longer tool life.

Series H853 HSS Hydra Body - Short Series - Inch 3xD

H853 1.11/64" HSS HYDRA SHORT SERIES (X3D) BODY

H853 1.3/16" HSS HYDRA SHORT SERIES (X3D) BODY

Series H855 HSS Hydra Body - Long Series - Metric 5xD

H855 12.00mm HYDRA DRILL BODY (X5D)

H855 12.50mm HYDRA DRILL BODY (X5D)

H855 13.00mm HYDRA DRILL BODY (X5D)

H855 14.00mm HYDRA DRILL BODY (X5D)

H855 15.00mm HYDRA DRILL BODY (X5D)

H855 16.00mm HYDRA DRILL BODY (X5D)

H855 17.00mm HYDRA DRILL BODY (X5D)

H855 18.00mm HYDRA DRILL BODY (X5D)

H855 19.00mm HYDRA DRILL BODY (X5D)

H855 20.00mm HYDRA DRILL BODY (X5D)

H855 21.00mm HYDRA DRILL BODY (X5D)

H855 22.00mm HYDRA DRILL BODY (X5D)

H855 23.00mm HYDRA DRILL BODY (X5D)

H855 24.00mm HYDRA DRILL BODY (X5D)

H855 25.00mm HYDRA DRILL BODY (X5D)

H855 26.00mm HYDRA DRILL BODY (X5D)

H855 27.00mm HYDRA DRILL BODY (X5D)

H855 28.00mm HYDRA DRILL BODY (X5D)

H855 29.00mm HYDRA DRILL BODY (X5D)

H855 30.00mm HYDRA DRILL BODY (X5D)

H855 32.00mm HSS HYDRA LONG SERIES (X5D) BODY

H855 33.50mm HSS HYDRA LONG SERIES (X5D) BODY

H855 35.00mm HSS HYDRA LONG SERIES (X5D) BODY

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Replaceable Head Drilling

Dormer

H853 1.11/64" HSS HYDRA SHORT SERIES (X3D) BODY

20 Variations

Dormer

H853 1.3/16" HSS HYDRA SHORT SERIES (X3D) BODY

20 Variations

Dormer

H855 12.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 12.50mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 13.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 14.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 15.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 16.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 17.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 18.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 19.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 20.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 21.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 22.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 23.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 24.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 25.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 26.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 27.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 28.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 29.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 30.00mm HYDRA DRILL BODY (X5D)

28 Variations

Dormer

H855 32.00mm HSS HYDRA LONG SERIES (X5D) BODY

28 Variations

Dormer

H855 33.50mm HSS HYDRA LONG SERIES (X5D) BODY

28 Variations

Dormer