Tube of Diamond Core Drill Bit 50mm Concrete Core Drill Bit

Key Features & Advantages

Wide Diameter Range (Φ18–400 mm)
We stock core barrels from Φ18 mm up to Φ400 mm, covering small anchor holes, service penetrations and large-diameter openings in floors and walls. Typical standard lengths are 350 mm and 450 mm, with effective lengths of 330 mm and 410 mm respectively. Other lengths can be produced according to your project or market requirements.

Flexible Thread Options for Global Markets
To match different drilling rigs and hand-held core drills, barrels can be supplied with:

• 1/2" BSP

• M22

• 1-1/4"-7 UNC

• 1-1/4"-3 and other custom thread forms

This allows your customers to mount the barrel directly on most popular core drilling machines without extra adaptors, simplifying inventory and improving compatibility.

High-Frequency & Laser Welded Construction
SENMINE offers both high-frequency and laser-welded barrels:

• High-frequency welding creates a large juncture plane between tube sections, producing strong, reliable joints that withstand deep-hole drilling stresses and repeated re-tipping.

• Laser welding is ideal for thinner steel tubes, where precise heat input and low distortion are critical. Ultrathin steel tubes can be used safely, with small melting zones and strong, consistent weld seams.

These welding methods improve overall barrel strength, reduce the risk of cracking, and provide a solid base for diamond crowns and segments.

Optimized Tube Design for Deep Holes
The barrel’s concentricity and stiffness are controlled to minimize runout, helping the bit start straight and stay on line even when passing through steel reinforcement. Stable drilling reduces side friction, protects the diamond segments, and results in cleaner, rounder hole walls. This is especially important for HVAC, plumbing and fire system installers who must pass pipes through precise openings in structural concrete.

Customizable for OEM & Special Projects
We understand that many buyers need their own specifications. SENMINE can tailor:

• Tube length, wall thickness and slot patterns

• Thread type and adaptor configurations

• External paint colour (black, red or custom RAL colours)

• Logo printing, labels and barcodes

• Packaged as barrels only, or combined with diamond crowns and segments

This makes our core drill bit barrels suitable for private-label programs and for drill bit manufacturers looking for a stable barrel supplier.

Typical Usage Scenarios

In real job sites, SENMINE core drill bit barrels are used wherever deep, precise holes are required:

• HVAC installation – Drilling through 200–400 mm reinforced concrete walls for chilled water pipes, air-conditioning copper lines and duct penetrations.

• Plumbing and fire-fighting systems – Creating passage holes in slabs and shear walls for water mains, drainage pipes and fire sprinkler risers.

• Electrical and data services – Opening clean, round holes for cable trays, conduits and junction boxes in commercial and industrial buildings.

• Anchoring and structural connections – Forming holes for large anchor bolts, threaded rods and steel connections in heavy construction.

Matched with suitable diamond segments, these barrels deliver smooth cutting, reliable productivity and long life in demanding drilling conditions.

OEM Supply and Quality Control

As a professional diamond tool manufacturer, SENMINE applies strict quality control to every batch of core drill bit barrels. Tube materials are inspected for straightness and wall thickness before welding. Welds are checked for strength and continuity, and finished barrels are tested for runout and thread accuracy.

We have exported core barrels and complete diamond core bits to many countries and regions, and can coordinate packaging, palletizing and documentation according to your import requirements. MOQ, lead time and shipping methods can be adjusted for distributors, wholesalers and large project contractors.

If you need a stable long-term supplier for core drill bit barrels, we can support you with consistent quality, flexible customization and competitive factory pricing.

FAQ

Q1: Are these barrels supplied with diamond segments or only as tubes?
We can supply barrels as tubes only for customers who weld their own diamond segments, or as fully assembled core bits with crowns and segments produced by SENMINE. Please specify which configuration you need when sending your inquiry.

Q2: Can I use the same barrel for wet and dry drilling?
The barrel itself can usually be used in both wet and dry systems, but the segment formula, segment height and water slot design must match the intended application. For reinforced concrete and large diameters, wet drilling is strongly recommended to protect both the barrel and segments.

Q3: How do I choose the correct length?
Choose the overall length based on the required hole depth plus allowance for stand-off, anchor plate thickness and rig mounting. Our standard 350 mm and 450 mm barrels cover most building applications, but we can produce longer or shorter versions for special projects.

Q4: Which drilling machines are these barrels compatible with?
With the available thread options (1/2" BSP, M22, 1-1/4"-7 UNC, 1-1/4"-3), our barrels can be matched to most common rig-mounted and handheld diamond core drilling machines. If you are unsure, send us the thread specification or machine model and we will recommend the right configuration.

Q5: What information should I provide for an OEM order?
For OEM and private label orders, please provide:

• Diameter range and length

• Thread type and drilling mode (wet/dry)

• Whether you need barrels only or complete core bits

• Colour, logo and packaging requirements

• Approximate monthly or yearly volume

This helps us design a specification that fits your market and keep production stable.

Usage Scenarios