The SDS-Plus TCT MEP Installation Channel
SDS-Plus TCT core bits are the MEP (mechanical, electrical, plumbing) installation workhorse for non-structural substrates. The rig is a standard SDS rotary hammer in impact-plus-rotation mode; the bit is a TCT-tipped hollow core; the substrate is brick, hollow block, aerated concrete (AAC), or light non-structural concrete. Volume applications include AC refrigerant pipe holes (Ø65 / Ø68 mm), electrical conduit penetrations (Ø35 / Ø45 mm), plumbing throughway (Ø45 / Ø65 mm), and junction box cutouts (Ø68 / Ø82 mm).
The MEP installation channel is large, fragmented, and brand-sensitive. EU electricians and plumbers run Bosch, Heller, and Hilti through trade supply chains; North American contractors run DeWalt and Irwin through Home Depot Pro and Lowes Pro; GCC and Asian HVAC installers run mixed channels with strong demand for private-label OEM at the distributor level. The SDS-Plus standard is universal across these markets — the same Ø68 mm bit fits any SDS-Plus rotary hammer regardless of brand.
Engineering Specifications
| Spec Area | Zhonghuan OEM Standard |
|---|---|
| Carbide grade | YG8C or YG11C — cobalt-rich, coarse grain, impact-optimized, material certificate per lot |
| Brazing process | Vacuum brazing at 1040 °C, controlled atmosphere, process documentation available |
| Body steel | 40Cr or 42CrMo4, heat-treated 35–45 HRC on tube body, harder on shank end |
| Shank | SDS-Plus per ISO 6296 / DIN 8517 dimensional compliance |
| Tooth count | 4-tooth (Ø35–55 mm) or 6-tooth (Ø65–82 mm) — matched to diameter range |
| Diameter range | Ø35, 45, 65, 68, 82 mm volume backbone; Ø50, 55, 75, 102 mm available on request |
| Tube depth | 50 mm and 100 mm standard cutting depths; 150 mm available for thick wall applications |
| Substrate target | Brick, hollow block, aerated concrete, light non-structural concrete — bond tuned per buyer's primary substrate |
Benchmark Spec-Matching
Zhonghuan supplies SDS-Plus TCT core bits against named brand benchmarks. The RFQ identifies the reference brand and target substrate; we respond with an engineering spec sheet matching the benchmark on carbide grade, brazing process, body steel, tooth geometry, and dimensional accuracy. Examples:
- Bosch SDS-Plus TCT Ø68 mm — EU MEP brick and hollow block. YG8C carbide, vacuum brazing, 40Cr body steel, 6-tooth geometry.
- Heller TCT Core Ø82 mm — EU AAC and brick. YG8C carbide tuned for AAC bond exposure, vacuum brazing, 42CrMo4 body steel.
- DeWalt DT60100 Ø65 mm — North American MEP installation. YG8C carbide, vacuum brazing, 40Cr hardened body.
- Hilti TE TCT Ø68 mm — TE rotary hammer ecosystem. YG11C impact-grade carbide, vacuum brazing, premium hardened body.
Cross-rig compatibility: SDS-Plus is a universal standard. A spec-matched Zhonghuan OEM bit fits any SDS-Plus rotary hammer — Bosch GBH, DeWalt D25, Hilti TE, Makita HR, Metabo, Milwaukee M18 — without adapter.
OEM Program Structure
| Stage | Deliverable |
|---|---|
| 1. Benchmark selection | Buyer specifies brand reference, target substrate, diameter range |
| 2. Spec lock | Engineering spec sheet — carbide grade, brazing, body steel, tooth count |
| 3. Sample drilling test | Witness test in target substrate, documented hole count and tooth wear |
| 4. Packaging proof | Printed sample of color box, blister card, or plastic case |
| 5. First production lot | Carbide material certificate, brazing process documentation, body steel mill certificate |
| 6. Repeat orders | Same locked spec; per-lot QC documentation continues |
MOQ and Packaging
- Standard MOQ — 300 pieces per size on volume diameters with documented engineering specs and standard packaging.
- Custom artwork MOQ — 500+ pieces per size per packaging variant for fully custom color box or blister card programs.
- Mixed-diameter starter kit — common Ø35/45/65/68/82 mm five-size pack at 200 pieces per size as a market entry option.
- Packaging formats — white box (industrial), color box (trade retail), blister card (hardware retail), plastic case kit (premium retail).
RFQ Checklist
- Target market and channel positioning (EU MEP / NA MEP / GCC HVAC / Asia)
- Primary substrate (brick / hollow block / AAC / light concrete)
- Diameter range and annual volume per diameter
- Benchmark brand reference (Bosch / DeWalt / Heller / Hilti)
- Carbide grade (YG8C or YG11C)
- Tube cutting depth (50 / 100 / 150 mm)
- Packaging format and custom artwork requirements
- Marking (laser etch, printed label, pad print)
- Documentation requirements (material certificate, brazing process, mill certificate)
- Sample order quantity and lead time
Start an SDS-Plus TCT Core Bit OEM Program
Send benchmark brand (Bosch / DeWalt / Heller / Hilti), target substrate, diameter range, annual volume, packaging, and marking requirements. We respond with a spec lock, sample drilling test plan, packaging proof timeline, and full quotation path.
Request SDS-Plus TCT Core Bit OEM Quote