T38 Rnd38 Hex32 Extension rod

T38 Rnd38 Hex32 Extension rod

T38 Rnd38 Hex32 Extension rod

King Kong Drills company produce different size and type coal cutting picks ,rock drilling tools, cutting picks, road milling teeth etc.


Customized logo(Min. Order: 1 Pieces)
Customized packaging(Min. Order: 1 Pieces)
Graphic customization(Min. Order: 1 Pieces)

if you need them.

please contact info@kingkongdrillsltd.com

Home (kingkongdrillslimited.com)


T38 Rnd38 Hex32 Extension rod

Bench drilling-Powerbit selection guide

Bench DrillingSoft rock Medium hard rock Hard rock Non abrasive rock Abrasive rock 130 MPa 220 MPa

MRB bit-retrac

Trubbnos buttons
The best choice for soft rock conditions. Trubbnos buttons and large vertical flushing grooves effec-tively remove larger chips, greatly increasing penetration rate. And more straightness by Retac skirt.

Powerface bit

Trubbnos buttons, heavy duty (HD)
Ideal for abrasive, medium hard to hard rock. Larger Trubbnos buttons and flushing grooves give the ideal balance between service life and penetration rate. Available with a short retrac for straight holes in broken rock.

Powerface bit

Spherical buttons, standard or heavy duty (HD)
For tough conditions in hard and abrasive rock. Optimized face and body design and with standard or large spherical buttons for long service life. Available with a short retrac for straight holes in broken rock.

Powerface bit

Trubbnos buttons
Designed for medium hard to hard rock. Trubbnos buttons provide better penetration rate than spherical buttons, and a longer service life than semi-ballistic ones. Available with a short retrac for straight holes in broken rock.

Flat face bit

Spherical buttons, standard or heavy duty (HD)
Ideal for hard, medium abrasive rock. The flat face, with many spherical buttons, offer an optimized energy transfer. Available with a short retrac for straight holes in broken rock.

Dome bit

Spherical or Trubbnos buttons
Can be used as an alternative to traditional reaming equipment in a pre-drilled hole and in all types of rock formations. Optimized face design for better removal of cuttings. Available with spherical or the effective Trubbnos buttons.

Please note: that all button bits are manufactured over-sized 0,5-2,5 mm (it depends on the size of bit and buttons), meaning that for example a 45,0 mm bit is at least 45,5 mm. as new, or the size of a 140,0 mm new bit can be 141,5 mm to 142,5 mm (it depends on the model and type of bit). This is done because of the fast initial wear on button bits. It is important to consider that the drilled hole could vary in size due to drilling conditions, drilling practices and ground formation.

T38 Drill string

T35 Bench Drilling retrac bits

T38 Rnd38 Hex32 Extension rod

T38 Extension rods

T38 Rnd38 Hex32 Extension rod

T38 Rnd38 Hex32 Extension rod

Fully carburized or surface hardened.
Flushing hole diameter 14,5 mm.

T38 Rnd38 Hex32 Extension rod

T38 Rnd38 Hex32 Extension rod

Product no. Product code Rod length Shank thread Carburized or surface hardened Shape Section Flushing hole Coupling D Wrench flat Strike face contact type mm foot/inch mm mm mm
90002957 235-2718-C,02 1 830 6′  T38 C Rnd38 38 14,5 – Yes Bottom drive
90515289 235-4731-SH,03 3 050 10′  T38 SH Rnd38 38 14,5 – No Bottom drive
90001962 235-0531-C,02 3 050 10′  T38 C Hex32 35,8 9,6 – No Bottom drive
90002310 235-2731-SH,03 3 050 10′  T38 SH Rnd38 38 14,5 – Yes Bottom drive
90515288 235-4737-SH,03 3 660 12′  T38 SH Rnd38 38 14,5 – No Bottom drive
90002682 235-2737-SH,03 3 660 12′  T38 SH Rnd38 38 14,5 – Yes Bottom drive
90503196 235-2740-SH,03 4 000 13’1½”  T38 SH Rnd38 38 14,5 – Yes Bottom drive
90510050 235-0540-C,02 4 000 13’1½”  T38 C Hex32 35,8 9,6 – No Bottom drive
90515291 235-4743-SH,03 4 270 14′  T38 SH Rnd38 38 14,5 – No Bottom drive

Tungsten carbide inserts

Use large-grain coarse-grained tungsten carbide, which has high wear resistance, impact resistance and thermal stability

Shank body

High-quality alloy steel is selected, and the stable heat treatment process makes the tooth body wear-resistant and tough

Brazing process

Through special welding process, the strength of pick welding is increased, the impact resistance is improved, and the carbide tip is not easy to fall off

Shank reinforcement

Through laser cladding, powder metallurgy technology and other technologies to protect the head of the tooth body, reduce the wear rate and extend the service life


According to different applications ,King Kong Drils offers three major types round shank picks :  rotary drilling picks,road header picks,road milling picks.Mainly used for coal mining and tunnel,tunnels,ground trenching and other excavation works,   and mainly equipped with shearer,boring machine,milling machines and other equipment.  Applied to all kinds of soft and hard soil, rock and concrete layer.

Plant show

How can we keep the quality stable?

  1. Raw material selected
  2. Advanced design and production equipment
  3. Skilled technician
  4. Finished Product testing
  5. Customers’ feedback to change design and materialas.

What we do?

We specialized in six industrial fields and professional supply over 146 kind product verified in over 400 specifications.As the Superhard composite material department,our product range including Earth drilling tools,PDC cutter,PDC drill bit,Holder and blade of Chain saw and other superhard composite material tools.

Technology advantage

We were awarded 2 National Gold Prizes and 128 Scientific Promotion Prizes and we have got 76 patents in recent years.


1.what can you buy from us?
Air Compressor,Drilling Rig,Drill Bit,Spare Parts

2.How can I make payment?
A: You can pay directly online on Alibaba with credit card, or TT, Western Union, LC etc.

3.How is the shipment? How long does it take?
A: For large quantity or heavy products, we ship by sea shipping or land shipping. Shipping efficiency depends on country and city you want to ship to. For small and delicate products, we ship by DHL, UPS, Fedex or TNT.You can also appoint shipping method you like before we ship.

4.How is your quality control?
A: We have our own experienced QC.There will be strict inspection and testing for every order before shipping out.

5.Do you have any certificate of authorization?
A: Our machinery is CE certified.

KINGKONGDRILL Co., Ltd has always valued end users’ first hand feedback to helps us in delivering products that suits for their own use.

We appreciate feedback from customers and it is our mission to continually excel ourselves in manufacturing quality products with the relentless efforts we put in.

For the pursuit of long time business cooperation, we don’t make cheap quality and offer cheap prices to lure business.

To KINGKONGDRILL Co., Ltd, quality comes first. For quality guarantee, we conduct strict inspections throughout the production and after the production.

We are capable of customizing for your ground condition: we can select proper tungsten carbide tips for your different hard rock condition.

In the passion we carry, our cutting teeth will help our customers to make more money when using our teeth over bigger companies that don’t know or care about individual customer requirement.

Please contact Bruce if you need any rock drilling tools or Mining picks.


Email: info@kingkongdrillsltd.com






There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Go to Top