R28 Drill bits

R28 Drill bits

R28 Drill bits

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)

please contact info@kingkongdrillsltd.com if you need them.


R28 Drill bits

R28 Drill bits

R28 Drill bits

Product No. Product code Front shape Button
Retrac No. of
Buttons x
Buttons angle Flushing hole Indexing
template for
mm          inchgauge      center

Ballistic and trubbnos buttons

90505178 107-5038-27-67,39-20 Flat Face Std 38 1½” No 7 5×9 2×7 40° 1 1 87003483
90505174 107-5041-27-67,39-20 Flat Face Std 41 1⅝” No 7 6×10 3×9 40° 1 1 87003499
90030066 107-5048-39-70,37-20 PUG -Flat Face Std 48 1⅞” No 9 6×10 3×9 35° 3 3 87003495

Spherical buttons

90505296 107-5037-27,39-20 Flat Face Std 37 1½” No 7 5×9 2×7 30° 1 1 87003483
90505177 107-5038-27,39-20 Flat Face Std 38 1½” No 7 5×9 2×7 30° 1 1 87003483
90505173 107-5041-27,39-20 Flat Face Std 41 1⅝” No 7 5×9 2×8 35° 1 1 87003499
90505169 107-5043-27,39-20 Flat Face Std 43 1⅔” No 7 5×9 2×9 35° 2 1 87003499
90509467 107-5045-37,39-20 Flat Face Std 45 1¾” No 9 6×9 3×8 35° 1 3 87003481
90030014 107-5045-39,37-20 PUG -Flat Face Std 45 1¼” No 9 6×10 3×9 35° 3 3 87003495

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.


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






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