# Diamond Core Bits — B2B Industrial Specification Monograph | Newtech Sources Co., Ltd.

> Laser-welded and high-frequency welded wet/dry diamond core drill bits and adapters for reinforced concrete coring and HVAC/plumbing installation.

## 1. Category Procurement & Engineering Summary
- **Manufacturer**: Newtech Sources Co., Ltd. (Founded 1998, Guangzhou, China · Tax ID / USCC: 914401067124673119)
- **Canonical Category Hub**: https://newtech-sources.com/products/category/diamond-core-bits
- **Active Series in Category**: 6 published industrial product series
- **Engineering Tolerance Benchmark**: Engineered to EN 13236 & ANSI B7.1 dimensional concentricity, segment shear-torque, and rotational safety tolerances
- **OEM / ODM Policy**: Process-by-requirement custom dimensions, alloy/bond formulation, laser marking, and private-label packaging
- **Quality Verification**: 100% Pre-Shipment Dimensional & Visual Inspection prior to dispatch
- **Port of Loading**: Flexible FOB & mixed-container consolidation from any port in China
- **Direct RFQ Endpoint**: https://newtech-sources.com/contact | Email: sales@newtech-sources.com
- **Parent Summary Index**: https://newtech-sources.com/llms.txt

## 2. Quick Comparison Matrix

| Model / SKU | Product Series | Dimensional / Key Summary | MOQ | Canonical URL |
| --- | --- | --- | --- | --- |
| NT-DCB-102 | Laser-Welded Heavy-Duty Wet Concrete & Asphalt Diamond Core Drill Barrel (1-1/4"-7 UNC) | 51 mm (2") to 24 x 4.8 x 10/12 mm (51 mm (2"), 24 x 3.5 x 10/12 mm, 450 mm (18"), 76 mm (3"), 102 mm (4"), 24 x 3.8 x 10/12 mm, …) | 30 Pcs | https://newtech-sources.com/products/diamond-core-bits |
| NT-DCB-101 | Diamond Core Bit Accessories | 25mm (1.0") to 102mm (4.0") (25mm (1.0"), 35mm (1-3/8"), 50mm (2.0"), 102mm (4.0")) | 50 Pieces | https://newtech-sources.com/products/diamond-core-bit-accessories |
| NT-DCB-103 | Dry & Wet Segmented Masonry & Brick Diamond Core Drill Bit with Slotted Barrel | 38 mm (1-1/2") to 152 mm (6" Vent) (38 mm (1-1/2"), 150 / 300 mm, 52 mm (2"), 65 mm (2-1/2"), 107 mm (4-1/4" Flue), 127 mm (5" Extractor), …) | 50 Pcs | https://newtech-sources.com/products/dry-wet-segmented-masonry-diamond-core-drill-bit |
| NT-DCB-106 | M14 / 5/8"-11 Angle Grinder Dry Porcelain, Tile & Granite Diamond Core Bit | 6 mm to 68 mm (Socket Box) (6 mm, 8 mm, 20 mm, 35 mm (1-3/8"), 68 mm (Socket Box)) | 100 Pcs | https://newtech-sources.com/products/m14-angle-grinder-dry-porcelain-diamond-core-bit |
| NT-DCB-104 | High-Frequency Welded Thin-Wall Reinforced Concrete Diamond Core Bit | 370 / 400 mm to 132 mm (5-1/4") (370 / 400 mm, 32 mm, 370 / 450 mm, 51 mm (2"), 76 mm (3"), 108 mm (4-1/4"), …) | 50 Pcs | https://newtech-sources.com/products/high-frequency-welded-thin-wall-diamond-core-bit |
| NT-DCB-105 | Roof-Top Segment Turbo Crown Diamond Core Drill Bit for Hard Aggregate | 52 mm (2") to 202 mm (8") (52 mm (2"), 450 mm, 82 mm (3-1/4"), 102 mm (4"), 152 mm (6"), 202 mm (8")) | 50 Pcs | https://newtech-sources.com/products/roof-top-segment-turbo-crown-diamond-core-bit |

## 3. Detailed Technical Specifications (6 Series)

### 3.1 Laser-Welded Heavy-Duty Wet Concrete & Asphalt Diamond Core Drill Barrel (1-1/4"-7 UNC) (NT-DCB-102)
- **Canonical URL**: https://newtech-sources.com/products/diamond-core-bits
- **Markdown Datasheet**: https://newtech-sources.com/llms/products/diamond-core-bits.txt
- **Model / SKU**: NT-DCB-102
- **Discipline**: Diamond Core Bits
- **Minimum Order Quantity (MOQ)**: 30 Pcs
- **Direct RFQ**: https://newtech-sources.com/contact?product=Laser-Welded%20Heavy-Duty%20Wet%20Concrete%20%26%20Asphalt%20Diamond%20Core%20Drill%20Barrel%20(1-1%2F4%22-7%20UNC)%20(NT-DCB-102)

**Overview**: Engineered for deep coring in reinforced concrete, cured asphalt, and stone. High-intensity laser welding fuses each diamond segment directly to the heavy-wall seamless steel tube, preventing segment loss even under intense frictional heat and heavy rebar strikes. 100% pre-shipment tested for concentricity and bond retention. FOB delivery from any port in China.

**Engineering Highlights**:
- CNC laser-welded 10-12 mm high-concentration diamond segments handle heavy #6-#8 steel rebar in structural concrete
- Heavy-wall stress-relieved seamless steel tube machined with wrench flats on a solid 1-1/4"-7 UNC hub
- Available in dedicated bond grades for high-PSI reinforced concrete or abrasive highway asphalt pavement test coring
- Custom extended barrel lengths (600 mm / 1,000 mm) and loose replacement retipping segments available

**Target Materials & Applications**: Structural reinforced concrete slabs, shear walls, bridge piers & airport runways, Highway asphalt & civil material-testing laboratory core sampling, 2.5 kW - 7.5 kW electric and hydraulic stand-mounted core drill rigs

**Technical Specifications**:
| model | thread | diameter | segmentSize | barrelLength |
| --- | --- | --- | --- | --- |
| NT-DCB-102-51 | 1-1/4"-7 UNC | 51 mm (2") | 24 x 3.5 x 10/12 mm | 450 mm (18") |
| NT-DCB-102-76 | 1-1/4"-7 UNC | 76 mm (3") | 24 x 3.5 x 10/12 mm | 450 mm (18") |
| NT-DCB-102-102 | 1-1/4"-7 UNC | 102 mm (4") | 24 x 3.8 x 10/12 mm | 450 mm (18") |
| NT-DCB-102-152 | 1-1/4"-7 UNC | 152 mm (6") | 24 x 4.0 x 10/12 mm | 450 mm (18") |
| NT-DCB-102-203 | 1-1/4"-7 UNC | 203 mm (8") | 24 x 4.2 x 10/12 mm | 450 mm (18") |
| NT-DCB-102-305 | 1-1/4"-7 UNC | 305 mm (12") | 24 x 4.8 x 10/12 mm | 450 mm (18") |

| Parameter | Specification |
| --- | --- |
| Diameter Range | 25 mm (1") to 600 mm (24") Custom Barrels up to 1,000 mm Length |
| Welding Process | Full-Penetration CNC Laser Welding |
| Hub Thread | 1-1/4"-7 UNC Female Standard (1/2" BSP & 5/8"-11 Available) |
| Bond Formulations | Dedicated Reinforced-Concrete Bond or Hard-Matrix Asphalt Test-Core Bond |

### 3.2 Diamond Core Bit Accessories (NT-DCB-101)
- **Canonical URL**: https://newtech-sources.com/products/diamond-core-bit-accessories
- **Markdown Datasheet**: https://newtech-sources.com/llms/products/diamond-core-bit-accessories.txt
- **Model / SKU**: NT-DCB-101
- **Discipline**: Diamond Core Bits
- **Minimum Order Quantity (MOQ)**: 50 Pieces
- **Direct RFQ**: https://newtech-sources.com/contact?product=Diamond%20Core%20Bit%20Accessories%20(NT-DCB-101)

**Overview**: Diamond Core Bit Accessories (NT-DCB-101) by Newtech Sources Co., Ltd. is engineered for commercial tile installers, stone fabricators, and mechanical/electrical contractors across North America and Europe. Thread mounts and shanks are customizable to regional standards including 5/8"-11 UNC, 1-1/4"-7 UNC, M14, M10, and 3/8" Hex shanks, with 100% pre-shipment concentricity verification.

**Engineering Highlights**:
- Precision CNC-machined steel barrel ensures zero wobble and clean hole entry
- High-grade thermal-stable diamond crystals resist glazing in dense porcelain and granite
- Full thread compatibility for North American (5/8"-11, 1-1/4"-7) and European (M14, 1/2" BSP) rigs
- Custom multi-piece contractor case assortments and retail packaging supported

**Target Materials & Applications**: Porcelain slabs, ceramic tiles, sintered stone, granite, and marble countertops, Reinforced concrete walls, bridge decks, and masonry block coring, Plumbing faucet holes, washbasin cutouts, and HVAC/electrical conduit penetrations, Handheld angle grinders, rotary drills, and stand-mounted diamond core drilling rigs

**Technical Specifications**:
| bore | size | model | segment |
| --- | --- | --- | --- |
| 5/8"-11 or M14 / Hex Shank | 25mm (1.0") | NT-DCB-101-D25 | 10mm Diamond Band |
| 5/8"-11 or M14 / Hex Shank | 35mm (1-3/8") | NT-DCB-101-D35 | 10mm Diamond Band |
| 5/8"-11 or M14 | 50mm (2.0") | NT-DCB-101-D50 | 10mm Diamond Band |
| 5/8"-11 or 1-1/4"-7 UNC | 102mm (4.0") | NT-DCB-101-D102 | 10mm Segment Height |

| Parameter | Specification |
| --- | --- |
| Cooling Mode | Dry or Wet Operation |
| Thread / Shank Mount | 5/8"-11 UNC (US), 1-1/4"-7 UNC, M14 (EU), M10, 3/8" Quick-Change Hex Shank |
| Working Barrel Length | 35mm (1.38"), 60mm (2.36"), 150mm (6"), 400mm (15.75"), 450mm (18") |
| Diamond Bonding Technology | Laser-Welded / High-Frequency Sintered Coring Segments |
| Diameter Range (Metric / Imperial) | 6mm (1/4") – 152mm (6") / Up to 350mm (14") for Engineering Core Bits |

### 3.3 Dry & Wet Segmented Masonry & Brick Diamond Core Drill Bit with Slotted Barrel (NT-DCB-103)
- **Canonical URL**: https://newtech-sources.com/products/dry-wet-segmented-masonry-diamond-core-drill-bit
- **Markdown Datasheet**: https://newtech-sources.com/llms/products/dry-wet-segmented-masonry-diamond-core-drill-bit.txt
- **Model / SKU**: NT-DCB-103
- **Discipline**: Diamond Core Bits
- **Minimum Order Quantity (MOQ)**: 50 Pcs
- **Direct RFQ**: https://newtech-sources.com/contact?product=Dry%20%26%20Wet%20Segmented%20Masonry%20%26%20Brick%20Diamond%20Core%20Drill%20Bit%20with%20Slotted%20Barrel%20(NT-DCB-103)

**Overview**: Engineered for HVAC installers, plumbers, and electricians who must core through finished interior brick and cinder block walls without water coolant. The slotted and corrugated barrel creates a continuous airflow that draws powdered masonry dust out of the kerf, keeping the laser-welded diamond segments cool during continuous dry operation. 100% pre-shipment tested. FOB delivery from any port in China.

**Engineering Highlights**:
- Laser-slotted barrel with spiral outer flutes evacuates brick and block dust rapidly during water-free indoor drilling
- 100% laser-welded segment attachment prevents segment loss under elevated dry-coring temperatures
- Matched to standard UK/EU/US boiler flue and extractor diameters (38, 52, 65, 107, 117, 127, 152 mm)
- Supplied individually or as 5-core / 11-piece plumber & HVAC dry-core kits with SDS-Plus/Hex arbors and drift key

**Target Materials & Applications**: Engineering brick, aerated concrete block (AAC), breeze block, limestone & mortar, Boiler flues, dryer vents, kitchen extractor ducts & finished interior retrofits, Handheld dry diamond core drills with micro-percussion or rotary action

**Technical Specifications**:
| model | thread | diameter | segments | workingLength |
| --- | --- | --- | --- | --- |
| NT-DCB-103-38 | 1/2" BSP or 5/8"-11 | 38 mm (1-1/2") | 4x Laser-Welded | 150 / 300 mm |
| NT-DCB-103-52 | 1/2" BSP or 5/8"-11 | 52 mm (2") | 4x Laser-Welded | 150 / 300 mm |
| NT-DCB-103-65 | 1/2" BSP or 5/8"-11 | 65 mm (2-1/2") | 5x Laser-Welded | 150 / 300 mm |
| NT-DCB-103-107 | 1/2" BSP or 5/8"-11 | 107 mm (4-1/4" Flue) | 6x Laser-Welded | 150 / 300 mm |
| NT-DCB-103-127 | 1/2" BSP or 5/8"-11 | 127 mm (5" Extractor) | 7x Laser-Welded | 150 / 300 mm |
| NT-DCB-103-152 | 1/2" BSP or 5/8"-11 | 152 mm (6" Vent) | 8x Laser-Welded | 150 / 300 mm |

| Parameter | Specification |
| --- | --- |
| Welding Process | 100% Laser-Welded Dry-Heat Resistant Diamond Segments |
| Barrel Architecture | Helical Spiral Dust-Fluted & Laser-Slotted Cooling Barrel |
| Adapter Support | SDS-Plus, SDS-Max & Hex Chuck Arbors + Tapered Center Pilot Pin |
| Operation Mode | Dry Dust-Swivel Handheld Coring (Also Supports Wet Use) |

### 3.4 M14 / 5/8"-11 Angle Grinder Dry Porcelain, Tile & Granite Diamond Core Bit (NT-DCB-106)
- **Canonical URL**: https://newtech-sources.com/products/m14-angle-grinder-dry-porcelain-diamond-core-bit
- **Markdown Datasheet**: https://newtech-sources.com/llms/products/m14-angle-grinder-dry-porcelain-diamond-core-bit.txt
- **Model / SKU**: NT-DCB-106
- **Discipline**: Diamond Core Bits
- **Minimum Order Quantity (MOQ)**: 100 Pcs
- **Direct RFQ**: https://newtech-sources.com/contact?product=M14%20%2F%205%2F8%22-11%20Angle%20Grinder%20Dry%20Porcelain%2C%20Tile%20%26%20Granite%20Diamond%20Core%20Bit%20(NT-DCB-106)

**Overview**: Designed for tile setters and kitchen countertop installers who use standard 4-1/2" (115mm) or 5" (125mm) angle grinders at 10,000–12,000 RPM. Built with internal vegetable cooling wax that melts during drilling to lubricate the diamond edge and absorb heat during dry operations. Cuts crisp, chip-free holes in porcelain stoneware, Dekton, quartz, and marble without requiring bulky water injection setups. 100% pre-shipment inspected. FOB delivery from any port in China.

**Engineering Highlights**:
- High-RPM (11,000 RPM) vacuum-brazed diamond crown drills dense Grade-5 vitrified porcelain in 8-15 seconds dry
- 6-16 mm bits contain internal thermal cooling wax; >= 20 mm bits feature spiral side dust-evacuation slots
- Direct M14 or 5/8"-11 female thread mounts rigidly onto standard angle grinders with zero chuck slippage
- Available in custom OEM anodized-aluminum tiler briefcases (e.g., 6/8/10/20/35/50/68 mm + chamfer cone)

**Target Materials & Applications**: Ultra-hard vitrified porcelain slabs, sintered stone (Dekton/Neolith), granite & marble, Electrical socket boxes (68 mm), plumbing pipes & anchor holes, Corded and cordless M14 / 5/8"-11 angle grinders

**Technical Specifications**:
| model | thread | cooling | diameter | diamondHeight |
| --- | --- | --- | --- | --- |
| NT-DCB-106-06 | M14 or 5/8"-11 | Internal Wax | 6 mm | 10 mm Vacuum Brazed |
| NT-DCB-106-08 | M14 or 5/8"-11 | Internal Wax | 8 mm | 10 mm Vacuum Brazed |
| NT-DCB-106-20 | M14 or 5/8"-11 | Side Slots | 20 mm | 15 mm Vacuum Brazed |
| NT-DCB-106-35 | M14 or 5/8"-11 | Side Slots | 35 mm (1-3/8") | 15 mm Vacuum Brazed |
| NT-DCB-106-68 | M14 or 5/8"-11 | Side Slots | 68 mm (Socket Box) | 15 mm Vacuum Brazed |

| Parameter | Specification |
| --- | --- |
| Diameter Schedule | 6 mm to 130 mm (Individual Sizes & 6-Pc/8-Pc Aluminum Tiler Kits) |
| Thread Options | M14 Female (EU/UK/AU/Asia) or 5/8"-11 Female (US/Canada) |
| Operating Speed | 8,000 - 11,000 RPM High-Speed Dry Angle Grinder Coring |
| Crown Matrix | Vacuum-Brazed Grade-A Diamond (35/40# - 45/50#) |

### 3.5 High-Frequency Welded Thin-Wall Reinforced Concrete Diamond Core Bit (NT-DCB-104)
- **Canonical URL**: https://newtech-sources.com/products/high-frequency-welded-thin-wall-diamond-core-bit
- **Markdown Datasheet**: https://newtech-sources.com/llms/products/high-frequency-welded-thin-wall-diamond-core-bit.txt
- **Model / SKU**: NT-DCB-104
- **Discipline**: Diamond Core Bits
- **Minimum Order Quantity (MOQ)**: 50 Pcs
- **Direct RFQ**: https://newtech-sources.com/contact?product=High-Frequency%20Welded%20Thin-Wall%20Reinforced%20Concrete%20Diamond%20Core%20Bit%20(NT-DCB-104)

**Overview**: Constructed with a thin-wall steel barrel that significantly reduces the cutting volume of concrete required per hole, enabling cordless and lightweight electric handheld core drills to achieve exceptional penetration rates. High-frequency silver-copper brazed crown segments offer razor-sharp cutting action and minimal thermal drag. 100% pre-shipment inspected. FOB delivery from any port in China.

**Engineering Highlights**:
- Thin-wall 2.0-2.5 mm kerf displaces 25-35% less concrete volume, boosting penetration speed on lower-amperage drills
- High-frequency silver-brazed cobalt matrix delivers smooth, low-vibration cutting through medium rebar
- Cold-drawn seamless alloy barrel resists ovality distortion under clamping and side loads
- Retipping replacement crown rings and full barrels available for B2B service centers

**Target Materials & Applications**: HVAC split-AC wall penetrations, plumbing risers & electrical conduits, Reinforced concrete slabs, brick walls & granite curbstones, Handheld wet core drills and compact vacuum-base core stands

**Technical Specifications**:
| model | length | thread | diameter | wallThickness |
| --- | --- | --- | --- | --- |
| NT-DCB-104-32 | 370 / 400 mm | M22 / 1-1/4"-7 / 1/2" BSP | 32 mm | 2.0 mm |
| NT-DCB-104-51 | 370 / 450 mm | M22 / 1-1/4"-7 / 1/2" BSP | 51 mm (2") | 2.0 mm |
| NT-DCB-104-76 | 370 / 450 mm | M22 / 1-1/4"-7 / 1/2" BSP | 76 mm (3") | 2.2 mm |
| NT-DCB-104-108 | 370 / 450 mm | M22 / 1-1/4"-7 / 1/2" BSP | 108 mm (4-1/4") | 2.2 mm |
| NT-DCB-104-132 | 400 / 450 mm | M22 / 1-1/4"-7 / 1/2" BSP | 132 mm (5-1/4") | 2.5 mm |

| Parameter | Specification |
| --- | --- |
| Welding Process | High-Frequency Silver-Alloy Induction Brazing |
| Thin-Wall Kerf | 2.0 - 2.5 mm Reduced Kerf Area for +30% Faster Penetration |
| Crown Type | Continuous Crown (< 45 mm) or Narrow-Gap Segmented (>= 51 mm) |
| Coolant Mode | Wet Coring (Handheld & Light Rig Drills) |

### 3.6 Roof-Top Segment Turbo Crown Diamond Core Drill Bit for Hard Aggregate (NT-DCB-105)
- **Canonical URL**: https://newtech-sources.com/products/roof-top-segment-turbo-crown-diamond-core-bit
- **Markdown Datasheet**: https://newtech-sources.com/llms/products/roof-top-segment-turbo-crown-diamond-core-bit.txt
- **Model / SKU**: NT-DCB-105
- **Discipline**: Diamond Core Bits
- **Minimum Order Quantity (MOQ)**: 50 Pcs
- **Direct RFQ**: https://newtech-sources.com/contact?product=Roof-Top%20Segment%20Turbo%20Crown%20Diamond%20Core%20Drill%20Bit%20for%20Hard%20Aggregate%20(NT-DCB-105)

**Overview**: Engineered with innovative pointed 'roof-top' segment geometry that creates high initial point pressure during startup. This allows operators to begin holes cleanly on polished hard granite, river gravel concrete, and heavy foundation slabs without chatter or walking. Turbo side corrugations sweep pulverized sludge out of the kerf rapidly. 100% pre-shipment tested. FOB delivery from any port in China.

**Engineering Highlights**:
- Peaked roof-top segment geometry concentrates initial contact pressure for instant, chatter-free self-centering without pre-dressing
- Corrugated turbo sidewalls reduce lateral friction and channel cooling water directly across hard flint/granite aggregate
- Laser-welded segment bond withstands heavy steel rebar encounters in bridge decks and foundation walls
- Offered in 1-1/4"-7 UNC (North America/Global), 1/2" BSP (Europe), and Hilti BI+/DD-BL compatible hubs

**Target Materials & Applications**: High-PSI cured concrete with heavy steel rebar & hard river-gravel/flint aggregate, Bridge decks, precast concrete beams, civil foundations & MEP penetrations, Stand-mounted electric and hydraulic diamond core drill rigs

**Technical Specifications**:
| model | thread | diameter | segments | barrelLength |
| --- | --- | --- | --- | --- |
| NT-DCB-105-52 | 1-1/4"-7 UNC / 1/2" BSP | 52 mm (2") | 5x Roof-Top Turbo (12 mm H) | 450 mm |
| NT-DCB-105-82 | 1-1/4"-7 UNC / 1/2" BSP | 82 mm (3-1/4") | 8x Roof-Top Turbo (12 mm H) | 450 mm |
| NT-DCB-105-102 | 1-1/4"-7 UNC / 1/2" BSP | 102 mm (4") | 9x Roof-Top Turbo (12 mm H) | 450 mm |
| NT-DCB-105-152 | 1-1/4"-7 UNC | 152 mm (6") | 12x Roof-Top Turbo (12 mm H) | 450 mm |
| NT-DCB-105-202 | 1-1/4"-7 UNC | 202 mm (8") | 14x Roof-Top Turbo (12 mm H) | 450 mm |

| Parameter | Specification |
| --- | --- |
| Diameter Range | 32 mm (1-1/4") to 500 mm (20") Complete Structural Coring Range |
| Segment Profile | Self-Centering Roof-Top (A-Shape) Corrugated Turbo Segments |
| Welding Technology | Automated Deep-Penetration Laser Welding (>= 1,600 MPa Shear) |
| Coolant Mode | Wet Rig-Mounted Structural Coring (Dry Soft-Bond Option Available) |