Diamond core bit Ø92 mm x 420 mm REMS 181040 R, UDKB

The diamond core bit 92mm REMS 181040 R belongs to the UDKB series and carries 8 high-content diamond segments joined by automatic induction tin brazing. Drilling depth is 420 mm. The UNC 1 1/4 female thread self-tightens under load, ensuring secure connection to the drive spindle. The tube body is manufactured with re-weldable technology: when segments wear down, you braze a new segment set instead of discarding the entire bit.

This bit cuts concrete, reinforced concrete, masonry, natural stone, asphalt and various screed layers. It operates hand-held or mounted on a drill stand. It is compatible with REMS Picus S1, SR, S3, S2/3.5 machines and any drill with a matching UNC 1 1/4 male thread. Both dry and wet drilling modes are supported.

Construction of the diamond core bit 92mm REMS 181040 R

The cutting crown comprises 8 high-content diamond segments brazed by automatic induction tin soldering, producing uniform joints. Segments are beveled in a roof profile to accelerate penetration, smooth the drilling rhythm and reduce vibration. The tube body is designed for re-welding: when segments are exhausted, you braze a new set for this 92 mm diameter. The UNC 1 1/4 female thread self-tightens during rotation, maintaining a firm connection to the machine spindle.

• 8 high-content diamond segments
• Automatic induction tin brazing for uniform joints
• Roof-profile bevel for fast, smooth penetration
• Re-weldable tube body when segments wear out
• UNC 1 1/4 female thread, self-tightening under load
• Drilling depth 420 mm
• Outer diameter 92 mm

The 420 mm drilling depth suits medium-depth holes in structural work. The 92 mm diameter sits between the Ø82 mm and Ø102 mm sizes in the UDKB range. REMS also offers the UDKB LS 181440 R and TDKB LS 181512 R variants at 92 mm diameter for different applications.

Materials and drilling modes

The bit cuts concrete, reinforced concrete, masonry, natural stone, asphalt and screed layers. Both dry and wet drilling modes are supported. Dry drilling saves water; wet drilling reduces dust and cools the segments. High-content diamond segments withstand heat well and maintain sharp cutting edges through many drilling cycles.

• Concrete and reinforced concrete
• Masonry and natural stone
• Asphalt and screed layers
• Dry drilling mode
• Wet drilling mode

The induction-brazed segments distribute heat evenly during operation. The roof-profile bevel reduces friction at the cutting face. Wet drilling extends segment life by preventing thermal buildup. Dry drilling is faster when dust extraction is available.

Machine compatibility

This bit is compatible with REMS Picus S1, SR, S3, S2/3.5 machines and any drill with a UNC 1 1/4 male thread. The female thread self-tightens under rotation, eliminating the need for additional locking tools. You can operate the bit hand-held or mount it on a drill stand depending on site conditions. Stand mounting improves alignment and reduces runout.

• REMS Picus S1, SR, S3, S2/3.5
• Any drill with UNC 1 1/4 male thread
• Hand-held or stand-mounted operation
• Self-tightening thread, no extra tools required

When mounted on a stand, the bit drills straighter and minimizes lateral deflection. Hand-held operation offers flexibility in tight spaces. The UNC 1 1/4 thread is a standard connection in professional core drilling equipment.

Common applications for the diamond core bit 92mm

This bit drills holes for electrical conduit, water pipes and ventilation ducts through thick concrete walls. It extracts concrete samples for quality testing on construction sites. It creates anchor holes for bolts and bracing rods in reinforced concrete structures. It penetrates asphalt and screed layers for utility installations. The 92 mm diameter accommodates medium-sized pipes and cables. The 420 mm depth reaches through standard walls and slabs.

Re-welding and maintenance

The tube body is designed for re-welding when diamond segments wear down. You remove the worn segments and braze a new set onto the same tube. This extends the service life of the bit and reduces replacement costs. Inspect segments regularly for wear depth. Clean the tube body before re-welding to ensure strong joints. Use induction brazing equipment for uniform heat distribution.

• Re-weldable tube body for extended service life
• Remove worn segments and braze new set
• Inspect segments regularly for wear depth
• Clean tube body before re-welding
• Use induction brazing for uniform joints

Re-welding is cost-effective for high-volume drilling operations. The tube body retains its dimensional accuracy after multiple re-welding cycles. Follow the manufacturer's brazing guidelines to maintain segment bond strength. Store the bit in a dry place to prevent corrosion of the tube body.