Tapered bits 7° H22 Button bit, long skirt diameter 40mm 8 pieces
1. Shattered buttons
Over drilling in soft non-abrasive
material leaves a shiny surface on the
buttons. Under magnification, a network of
microscopic cracks can typically be found.
Regularly inspect the bits and re-profile the
buttons to remove these cracks from the
surface of the carbides once the skin on the
carbides starts to show
(4) Check that bit diameters are smaller
than the hole before attempting to clean
or deepen a hole under these conditions.
Do not force bits if jamming occurs.
Retract until rotating freely then advance
slowly with moderate rotation. If this
fails, use a scrapped bit or grind down
the gauge buttons of the bit to reduce the
diameter sufficiently to pass or remove the
When it is used to treat peat soil or groundwater with erosive,
groundwater flow rate and gushing water, it is advisable to test
its applicability.It is widely used in silt, silty soil, cohesive
soil, silty clay, (clay), silt soil due to the influence of soil
layer, soil particle size, soil density, hardener viscosity and
hardener hardening time. (Asian sand), sand, loess and artificial
fills in the soil filling and even gravel soil and other soil
It is widely used in silt, silty soil, cohesive soil, silty clay,
(clay), silt soil due to the influence of soil layer, soil particle
size, soil density, hardener viscosity and hardener hardening time.
(Asian sand), sand, loess and artificial fills in the soil filling
and even gravel soil and other soil layers.
It can be used for foundation reinforcement of existing buildings
and new buildings, or as foundation for seepage prevention; it can
be used as temporary measures during construction (such as deep
foundation pit retaining or water retaining, waterproof curtain,
etc.) It can also be used as foundation reinforcement and
anti-seepage treatment for permanent buildings.
Selected high-quality steel: the use of domestic high-quality
steel, so that the submerged hole drill body part of the hardness
is higher, durable.
Wear-resistant alloys are made of high-quality wear-resistant hard
alloys suitable for rock formations of various hardnesses.
Advanced processing equipment: advanced CNC machining equipment,
optimized product processing technology, DTH drill bit size is more
standard, higher precision, more uniform tooth.
1 The alloy column can be arranged reasonably according to the
2 It can be self-grinding during the perforation process, so that
the drilling speed of the drill bit tends to be stable;
3 The embedding process is simple, and it can be embedded by cold
4 When the column teeth wear 20%, the drill can still continue to
|Diameter||Face Type||Buttons x Dia (Inch)||Flushing|
|32||Concave||6 x 14||3 x 13||3 x 12||3||4.7||/|
|34||Concave||6 x 14||3 x 13||4 x 12||3||5.2||/|
6 x 14
|3 x 14||4 x 12||3||6.2||/|
|38||Concave||9 x 14||3 x 14||5 x 12||3||7.8||/|
|40||Concave||9 x 14||3 x 14||5 x 12||3||8.4||/|
Product photos :