WS39 casing tooth
JM cutter tooth
B47K22 bullet toothDRILLNOVA / ROTARY DRILLING TOOLS
Bullet teeth & holders
Compare carbide diameter, body protection and the holder interface across B47, C and SM models, with separate holder drawings.
B47: compare the insert and body.
B47 bullet teeth are round shank chisels with a tungsten carbide tip and steel body. K22 and K22H share a 22 mm insert diameter but show different insert-section heights. The D variants widen the body and add visible protective buttons.
| Reference | Main insert diameter | Body diameter | Height shown | Visible design distinction |
|---|---|---|---|---|
| B47K19 | 19 | 50 | 70 upper + 60 lower | Smaller main insert; plain shoulder |
| B47K22 | 22 | 50 | 130.1 overall | 27 mm insert section in the catalogue |
| B47K22H | 22 | 50 | 130.5 overall | 30 mm insert section; compare the complete drawing |
| B47K26D | 26 | 60 | 75 upper + 60 lower | Body-protection buttons around the main insert |
| B47K28D | 28 | 60 | 76 upper + 60 lower | Larger main insert; body-protection buttons |
The drawings use Ø30 / Ø38 mm lower-interface callouts for these references. Similar shank dimensions do not by themselves confirm holder, retention or working-projection compatibility.
B47K22H
Same 22 mm insert diameter as K22, with a different 30 mm section-height callout and 130.5 mm overall length.
Request this configurationB47K26D
Wider 60 mm body with 26 mm insert; the illustration adds rounded protective buttons around the upper body.
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B47K28D
Wider 60 mm body with 28 mm insert; protective buttons are shown. No hardness or alloy grade is specified for these buttons.
Request this configurationA holder is part of the cutting geometry.
The angled B43H block and rounded BHR holders present different external shapes and welding surfaces. Bore steps, seating length and retainer engagement must agree with the selected tooth. A worn or incorrectly positioned holder can change the tooth attitude even when the replacement tooth itself is correct.
BHR78T
Same listed envelope as BHR78; the image shows added buttons along the outer edge.
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BHR68
Smaller 68 mm external diameter with the same depicted height and bore steps.
Request this configuration| Holder | Height | Outside diameter | Bore callouts | Visible distinction |
|---|---|---|---|---|
| B43H | 65 mm | Block-type | 38.2 / 30.2 mm | Angled welding block |
| BHR78 | 95 mm | 78 mm | 38.2 / 30.2 mm | Rounded body |
| BHR78T | 95 mm | 78 mm | 38.2 / 30.2 mm | Additional external buttons |
| BHR68 | 95 mm | 68 mm | 38.2 / 30.2 mm | Narrower external body |
Other round-shank references.
C and SM models offer other cutting-point and body shapes. Compare the complete drawings; models in one family may use different holders.
C21
Smaller round-shank chisel; differs from C23 in the insert diameter shown.
Request this configuration
BODY WEAR / THREE DIFFERENT APPROACHES
What changes around the carbide?
The main insert cuts the rock. These protection arrangements address erosion of the supporting steel around it. The photographs show three approaches from our product presentation; specify the option on the selected tooth version.
Laser-fused protection
A laser melts the protection material onto the steel surface. The photograph shows the treatment around the shoulder below the main insert.
Hard-facing
Deposited wear-resistant material forms a visible band around the tooth shoulder, protecting the supporting body area.
Carbide buttons
Additional tungsten-carbide buttons are inserted around the body. They protect a different area from the main cutting insert.
Range-level examples; the photographed teeth are not labelled as B47K22. Grade, protection coverage and the actual supplied variant are specified separately.
The insert-to-body joint matters.
Carbide, brazing and body support.
Our round-shank catalogue describes tungsten-carbide inserts, induction brazing and a wear-resistant steel body. The insert needs support from the surrounding steel; an intact carbide tip can still be undermined by body erosion. A sound braze joint and an appropriate wear-protection arrangement address different parts of that failure path.
Carbide grade, body treatment and the supplied protection option belong to the selected variant. During a trial, record body wear, tip condition, rotation in the holder and retention at the same inspection intervals.
See the trial inspection checkpointsDimensions shown in the model drawings are nominal millimetre references. Confirm the complete tooth, holder and retainer against the order drawing.
Match the working method to the ground.
B47K22 barrel and bucket · 1,200 mm pile
A lifted-tool inspection prompted a change in method. At the Guangdong site, the crew cleared packed cuttings and reviewed the recovered ground before switching to direct bucket work.
The report connects the drilling sequence, tooth-rotation checks and the operator’s response. It helps separate a cutting-part question from a wider clearing or method question.
Read the on-site method review →The reported progress after the method change is not a measured gain in B47K22 tooth life.
PRODUCT & PROJECT ENQUIRY
Match the tooth, holder and retainer.
Share the model, quantity and your current application. A photograph or drawing helps us check the complete configuration.