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Roller-bit core barrels
DRILLNOVA offers roller-bit core barrels for bored piling. Discuss a complete barrel, a replacement cutting ring assembly or replacement roller bits for an existing tool. Confirm the retained steelwork, cutting layout, drive connection and core-recovery method before specifying the supply.
Build the cutting ring around the working paths
The steel ring, outer cutting path and inner cutting path are separate references. Changing a roller-bit model or position changes the cutting geometry, even if the barrel body stays the same.
Check the inner and outer cutters from a common centre and plane. Review radial position, leg tilt, orientation and projection across the complete ring.
Compare supply options: barrel, ring or roller bits
Complete new barrel
- What changes
- Shell, cutting ring, cutter arrangement, guides and drive connection form one specified assembly.
- Assembly decision
- Establish the cutting envelope and working height with the complete tool.
Replacement cutting ring assembly
- What changes
- A new cutting ring must connect to retained steelwork.
- Assembly decision
- Check the joining reference, remaining body condition and guide arrangement.
Cutter replacement or conversion
- What changes
- New legs occupy existing or modified openings.
- Assembly decision
- Inspect ring shape, opening fit and projection before copying the old positions.
Position first, remeasure the full set
The 1,800 mm build used 16 roller bits and four scrapers. Its 1,770 mm outer and 1,530 mm inner cutting paths defined a 120 mm radial groove width. The separate steel-ring reference was 1,650 mm.
The workshop positioned the first inner and outer bits, then fitted, remeasured and adjusted the remaining set. Record the drawing value, actual reading and correction at each position. Recheck the final geometry after welding under the specified procedure and heat controls.
These dimensions describe one recorded build. They are not a standard configuration for every barrel carrying the same nominal size.
Include the surrounding assembly
Review guide-strip height and layout, scrapers and roller-bit positions together. Check cuttings discharge against the ground, fluid supply and operating record; plan core recovery separately. For a rebuild, photograph the full ring and identify retained steelwork before defining the supply.
See the 800 mm field trial: cutting, clearing and core recovery
CUTTING ARRANGEMENT
See how the parts are arranged
See the roller-bit assembly in motion
Read the video description
The view moves from the complete barrel above the rock to a transparent body and the roller bits around the cutting ring.
The animation shows the cutting arrangement around a roller-bit core barrel. Mounting geometry varies with the barrel design.
Before reviewing a barrel requirement
What should I include in a roller-bit or core-barrel enquiry?
Identify the supply scope, model or clear photographs, cutting diameter, mounting details, ground, quantity and destination. For an existing barrel, include connection measurements and photographs around the ring.
Which barrel heights should I include in an enquiry?
Provide the overall barrel height and the clear internal height as separate dimensions. Mark the start and end of each measurement on the assembly drawing or clearly marked photographs, and show the top plate and any reinforcing ribs within the core space. An outside photograph alone does not establish that internal clearance. Label whether the dimensions belong to the cutting barrel or a separate core-recovery tool.
Why can a short barrel recover a longer rock core?
Drilling and recovery may use different tools. A short recovery barrel can lift a core prepared at an earlier stage. Provide the hole and core dimensions and identify both tools before comparing their lengths.
What information is needed before discussing pressure or rotation speed?
Provide the rig, tool diameter, roller-bit layout, ground, depth and operating records. Label control readings clearly. Settings must be reviewed for that setup; a value shown in another video is not a setting for your equipment.
PRODUCT & PROJECT ENQUIRY
Review a roller-bit barrel requirement
Send the barrel dimensions, drive connection, ground information and whole-ring photographs, with quantities and delivery destination. Choose the supply scope below.
Email product photographs- Pile diameter, required cutting diameter, overall barrel height and clear internal height, with measurement points marked on a drawing or photographs
- Rig model, drive connection and selected drawing
- Ground information and the planned core-recovery method
- Whole-ring photographs, quantities and delivery destination