WS39 casing tooth
JM cutter tooth
B47K22 bullet toothRoller bits for
core barrels.
Compare weld-on and replaceable MH-series roller bits for bored-piling core barrels. Match the mounting to your tool, then confirm the drawing and supply scope with our team.
For round-shank cutting teeth and their holders, see bullet teeth & holders.
Start with the mounting.
Compare up to three models. Cone size alone does not confirm that a replacement will fit.
ROLLER BITS
Find your model
Explore the MH series by mounting arrangement.
MH-3
Weld-on
139 mm52 insertsØ14 mm
Thicker weld-on leg with a preset welding angle.
- Check the thicker leg profile and preset welding angle against the barrel layout.
- Confirm radial position, working height and orientation against the selected drawing revision.
- Specify replacement roller bits only, a cutting ring assembly or a complete core barrel.
MH-2
Weld-on
139 mm52 insertsØ14 mm
Curved weld-on leg.
- Compare the curved weld-on leg profile with the existing barrel opening.
- Confirm the installation position and orientation against the selected drawing revision.
- Specify replacement roller bits only, a cutting ring assembly or a complete core barrel.
MH-3H
Weld-on
191 mm17 mm inserts
Larger weld-on assembly with a 191 mm cone.
- Compare the larger leg profile and available space with the existing mounting area.
- Confirm the installation position, orientation and complete configuration on the selected drawing.
- Specify replacement roller bits only, a cutting ring assembly or a complete core barrel.
MH-1
Weld-on
132 mm45 insertsØ13 mm
Flat weld-on leg with a 132 mm cone.
- Compare the flat weld-on leg profile with the existing mounting area.
- Confirm the installation position and orientation against the selected drawing revision.
- Specify replacement roller bits only, a cutting ring assembly or a complete core barrel.
MH-3C
Holder-mounted
139 mm52 insertsØ14 mm
Separate holder for a replaceable cutter arrangement.
- Compare the existing holder interface and retaining arrangement with the selected drawing.
- Check the installed position and clearance on the complete tool.
- State whether the request includes the roller bit, holder and retaining components.
MH-3B
Bolt-mounted
139 mm52 insertsØ14 mm
Crossbar mounting with two bolts and locknuts.
- Compare the existing crossbar and two-bolt arrangement with the selected mounting drawing.
- Check clearance around the roller bit, mounting plate, bolts and locknuts.
- State which parts are required: roller bit, crossbar and fastening components.
MH-3R
Holder-mounted
139 mm52 insertsØ14 mm
Face-fastener holder; application review required.
- Confirm the intended piling application; the MH-3R leaflet describes HDD/microtunnelling use.
- Compare the holder interface, face-fastener arrangement and clearance with the selected drawing.
- State whether the request includes the roller bit, holder and fastening components.
3D product renderings. Review reference drawings by model before ordering.
Mounting arrangements are not universally interchangeable. Check the holder or bolt interface for your tool.
Roller-bit drawings and specifications.
Reference drawings and catalogue specifications, together in one place.
Reference drawings by model
Reference drawings
Select a model to review its preview. Full dimensioned drawings are available on request.
MH-1D260126C-1
MH-2D260318B-4
MH-3D260327B
MH-3BD260318B-5
MH-3CD260318B-2
MH-3HD260318B-1
MH-3RD260318B-3
Full specification table
| Model | Catalogue cone size | Insert arrangement | Leg / installation distinction | Listed cone / leg material |
|---|---|---|---|---|
| MH-1 | 132 mm | 45 inserts · Ø13 mm | Flat weld-on leg; selected drawing revision applies | 20CrNiMo / 20CrNiMo |
| MH-2 | 139 mm | 52 inserts · Ø14 mm | Third-generation cone; curved weld-on leg | 20CrNiMo / 20CrNiMo |
| MH-3 | 139 mm | 52 inserts · Ø14 mm | Thicker fourth-generation leg with preset welding angle | Confirm cone and leg grades against the selected drawing |
| MH-3C | 139 mm | 52 inserts · Ø14 mm | Separate holder; replaceable cutter arrangement | Confirm cone and leg grades against the selected drawing |
| MH-3B | 139 mm | 52 inserts · Ø14 mm | Crossbar, two bolts and locknuts | Confirm cone and leg grades against the selected drawing |
| MH-3R | 139 mm | 52 inserts · Ø14 mm | Distinct holder and face-fastener arrangement² | Confirm cone and leg grades against the selected drawing |
| MH-3H | 191 mm | 17 mm inserts | Larger fourth-generation weld-on assembly | 20CrNiMo / 20CrNiMo |
Nominal catalogue data. Final dimensions, material and mounting are defined by the selected order drawing. The complete MH-3H configuration is confirmed on its selected drawing. ²The MH-3R leaflet describes HDD/microtunnelling use; assess the specific tool before a piling application.
Ordering an “8½-inch roller bit”?
Send the original description, a photo and any dimensioned drawing. Catalogue cone size and the dimensions of the complete mounting are different checks.
What does the 8½-inch size actually describe? Separate nominal inch size, catalogue cone size and the complete barrel’s cutting diameter.
Roller-bit manufacturing and inspection.
Watch machining, carbide insert pressing and laser marking up close, then see what to check before delivery.
What to check
Journal dimensions, cone and leg fit, and mounting dimensions against the selected drawing.
Roller-bit installation and field records.
All case studies
Replacing cutters. Keeping the barrel.
MH-3 replacement on an existing barrel, with positioning, welding guidance and operator training.
View the field record
Core-barrel design and site trial.
A high-spiral barrel and revised cutter layout, followed through the site trial and cutter inspections.
View the field recordInstallation & operating guides
Let’s match the next
set to your tool.
Send what you have. A clear photo is a useful place to start.
Need a complete core barrel? Explore core barrels
- Your part
- Model or close-up photos of the leg, holder or bolts.
- Your tool
- Whole-tool photo, barrel diameter and mounting dimensions or drawing.
- Your requirement
- Cutters only, a set, or cutters with holders and fixing parts. Add quantity and destination.
For a new layout or a drilling problem, include the rig, formation and wear photos.