Integral Drill Steels

Integral Drill Steels are normally produces from 19 mm (3/4”), 22 mm (7/8”) or 25 mm (1”) Hexagon Drill Steel, where the dimensions given are measured across the flat of the hexagon.
This Rod is widely used for rock drilling, blasting holes and other drilling works in the quarries, coal mines, traffic and other constructions....

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Integral Drill Steels are a fixed length with a shank at one end and a bit at the other, and are able to drill to a depth equivalent to their effective length. The bit may consist of a single chisel shaped tungsten carbide insert or three such inserts.

To drill deep holes, the rods are designed to be used in a series where the length of any rod used is longer than the one used just before it. 

To do this, a series of rods must be produced so that the bit diameter is reduced for each increase in length of rod to prevent jamming of the bit in the hole.

 

GMD Integral Drill Steels has

● high fatigue strength and toughness

● high resistance to wear and permanent distortion

● properties that enable efficient and economic production

● close tolerances for automated manufacturing processes

● a uniform response to heat treatment

● uniform straightness, eliminating the need for straightening

 

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Integral Drill Steels 

Shank Type

Effective Length   (L)

Head DiameterN
mm
foot/inch
mm
inch

Hex19 × 108mm

400 ~ 4,000

1’ 4” ~ 13’ 1”

23 ~ 35

27/32 ~ 1 3/8

Hex22 × 108mm

400 ~ 9,600

1’ 4” ~ 31’ 6”

26 ~ 41

1 1/32 ~ 1 39/64

Hex25 × 108mm

600 ~ 6,400

 1’ 11 5/8” ~ 21’

33 ~ 45

1 19/64 ~ 1 25/32

Hex25 ×159mm

800 ~ 6,400

2’ 7” ~ 21’

35 ~ 42

1 3/8 ~ 1 21/32


Heat Treatment

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Packing Picture

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Key Words

Integral Drill Steels

drill rod
hex rod


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