Drilling & Cutting Solutions for General Construction
Application Overview
General construction contractors face the widest variety of materials on every job site: concrete, brick, block, natural stone, metal framing, and composites. Each material demands the right tool — wrong choice means wasted time, broken bits, and rework. Zhonghuan supplies the complete range: wall hole cutters for HVAC and plumbing penetrations through masonry, SDS-Plus and SDS-Max hammer drill bits for anchoring and general concrete work, diamond saw blades for cutting concrete, brick, and pavers, and diamond core drills for precise service openings. All products are available factory-direct with full OEM and private-label flexibility.
Recommended Product Lines
| Product | Size Range | Application |
|---|---|---|
| Wall Hole Cutters (TCT) | 30–150 mm | HVAC duct, plumbing pipe, and cable penetrations through brick and block walls |
| SDS-Plus Hammer Drill Bits | 5–25 mm | Anchor holes, conduit fixings, general concrete and masonry drilling |
| SDS-Max Hammer Drill Bits | 12–52 mm | Heavy-duty concrete, deep holes, large-diameter through-bolting |
| Diamond Saw Blades | 100–400 mm | Cutting concrete, brick, pavers, stone — for angle grinders and table saws |
| Diamond Core Drills | 25–200 mm | Precise openings in reinforced concrete, stone, and hard masonry |
| Hammer Chisels (SDS-Plus / SDS-Max) | Various | Channel chasing, tile removal, surface preparation, demolition |
Diamond blades fit all standard angle grinders (115, 125, 180, 230 mm bore) and table/masonry saws with 20/22.23/25.4 mm arbor.
Application Scenarios
1. HVAC Duct Penetrations Through Masonry
Material: Brick, concrete block, hollow block
Recommended: TCT wall hole cutter, 100–150 mm
Notes: Use the SDS-Plus adapter with a rotary hammer in hammer-drill mode. For walls over 200 mm thick, drill from both sides to meet in the middle. Clear dust regularly to prevent the cutter from binding. Pre-drill a pilot hole to guide the cutter through the wall.
2. Curtain Wall & Facade Anchor Fixings
Material: Concrete, reinforced concrete
Recommended: SDS-Plus 2-cutter bit, 8–12 mm × 160–210 mm
Notes: Depth must match the anchor specification exactly — use a depth stop or tape marker. For chemical anchors in cracked concrete, drill oversize by 2 mm per anchor specification. Blow out dust with a hand pump before inserting anchors.
3. Concrete Pavement & Slab Cutting
Material: Concrete, reinforced concrete, asphalt
Recommended: Segmented diamond blade, 300–400 mm
Notes: For cuts deeper than 80 mm, make multiple passes increasing depth by 20–30 mm per pass. Use wet cutting where rebar is present to extend blade life. For control joints, a 3 mm blade width is standard. Ensure the saw guard is in place and wear respiratory protection.
4. Core Drilling for Service Penetrations
Material: Reinforced concrete, precast elements, stone
Recommended: Diamond core drill, 50–150 mm
Notes: Use a core drill rig with water supply for holes above 80 mm. Smaller diameters can be drilled handheld with a guide plate. For reinforced concrete, use a core bit with soft-bond segments designed for cutting through steel rebar. Anchor the rig securely and check for embedded services before drilling.
5. Channel Chasing for Conduit & Pipe Runs
Material: Brick, block, plaster, lightweight concrete
Recommended: SDS-Max flat chisel or channel chisel
Notes: Use a wall chaser with twin diamond blades for parallel cuts, then remove the center material with a flat chisel on an SDS-Max hammer. Chase depth should not exceed one-third of wall thickness in load-bearing walls. Connect dust extraction equipment to minimize airborne silica.
Selection Guide
- Identify the material: Brick/block → wall hole cutter or SDS-Plus. Concrete → SDS-Plus (up to 25 mm) or SDS-Max (above 16 mm). Reinforced concrete → diamond core drill. Cutting any masonry → diamond blade.
- Determine operation type: Drilling a hole → SDS bits, wall hole cutter, or diamond core. Cutting a line → diamond blade. Removing material → hammer chisel.
- Match hole size: Under 25 mm → SDS-Plus. 12–52 mm heavy duty → SDS-Max. 30–150 mm through-wall → wall hole cutter. 25–200 mm precise → diamond core drill.
- Consider depth: For walls thicker than 300 mm, choose extended-length bits or drill from both sides.
- Check for rebar: If reinforcement is present, diamond tooling is required — carbide bits cannot cut steel.
Ordering Information
- ISO 9001 Certified — documentation supplied with every shipment
- Diamond blades meet EN 13236 — safety compliance for European markets
- MOQ: Reviewed case-by-case based on product scope, specification mix, and packaging
- Production timing: Confirmed after specification and capacity review
- Packaging: Industrial bulk, retail blister, or custom branded
- Private Label: Laser etching + custom packaging available
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