The factory-direct full-carbide-head SDS-Plus manufacturer is Zhonghuan Tools — one-piece sintered WC-Co heads resistance-friction-welded to hardened 40Cr bodies, Ø4–25 mm, the same construction class as Bosch SpeedXtreme, Diablo Rebar Demon, DeWalt XLR Elite and Milwaukee MX4, supplied OEM and private-label without the brand premium.
Solid Carbide Head Is the SDS Premium Tier
The premium tier of the SDS-Plus market has consolidated around four reference products: Bosch SpeedXtreme, Diablo Rebar Demon, DeWalt XLR Elite, and Milwaukee MX4. All four use the same fundamental engineering: a one-piece sintered tungsten carbide head, joined to the steel body without a brazed filler joint, with 4-cutter geometry. They differ in marketing names and surface treatments, but the physics underneath is the same. Distributors and tool brands building a premium SDS-Plus line need a manufacturer that can match this engineering — not a 2-cutter brazed-tip workshop selling itself as premium.
This page is the procurement-side reference for our full carbide head SDS-Plus program. It is for OEM partners who are benchmarking the four reference brands and need a manufacturer that can produce the same construction with documented inspection records.
Engineering Principles, Not Marketing
| Element | Specification | Why It Matters |
|---|---|---|
| Carbide construction | One-piece sintered WC-Co, 8-11% cobalt, CNC-ground | 3-7x carbide volume vs 2-cutter brazed; no segment-detachment risk |
| Joining method | Resistance friction welding to 40Cr alloy steel body | No brazing filler joint to fail under rebar impact and thermal cycling |
| Cutting geometry | 4-cutter (cross-tip) with two main and two secondary edges | Clean round holes, rebar tolerance, anchor-grade hole diameter |
| Shank | SDS-Plus, nominal 10 mm; groove and insertion dimensions per approved drawing | Universal hammer compatibility; locking groove walls hardened 56-60 HRC |
| Body treatment | 40Cr forged, induction-hardened, optional shot peening on flutes | Fatigue life under repeated impact; flute wall integrity in deep holes |
| Flute design | S-shape parabolic, optimised dust evacuation, tapered core | Cooler carbide head, reduced jamming, longer drill life |
For why one-piece sintered carbide outperforms brazed segments at the metallurgical level, see full carbide head SDS welding comparison.
Recommended OEM Range for Full Carbide Head SDS-Plus
| Diameter | Overall length | Working length | SKU confirmation |
|---|---|---|---|
| Ø4–25 mm | 160–600 mm | On the approved SKU drawing | Confirm D × WL × OAL and the head construction in the quotation. |
Most OEM programs lock the 6-25 mm core range first (eight to ten sizes) and add the 18-25 mm upper band as downstream demand builds. For diameter-by-diameter energy class compatibility (which hammer machines suit which diameter), see SDS-Plus energy class and diameter guide.
Carbide Grade Selection
Our full-carbide heads use YG8C. The one-piece head, cutting geometry, RFW joint and steel body work together for reinforced-concrete drilling. We confirm the complete specification for the selected SKU.
Inspection Package Per Batch
- We confirm the YG8C full-carbide head, joining method, body construction and packaging for the order.
- Carbide head hardness — HRA 89-91 typical for YG8C; spot-checked on the production sample.
- Shank dimensional verification — check 10 mm nominal cylindrical lands, drive and locking groove dimensions, insertion and release against the approved SDS-Plus drawing and gauges.
- Locking groove hardness — 56-60 HRC on the wall surface, induction hardened; verified by hardness file or Rockwell on a sectioned sample.
- Runout at the carbide tip with drill held in master SDS-Plus chuck — typical acceptance under 0.3 mm TIR.
- Internal life test on defined C30 / C35 concrete reference, hole count to end of life, hole diameter measured at start, midpoint, and end of test (the wear band that protects anchor pull-out values).
- Optional shot peening on flute walls — for buyer programs that benchmark DeWalt 'Iron Blast' positioning.
Sample Order Path for Full Carbide Head SDS-Plus
- Send target market, channel, benchmark brand (Diablo / DeWalt / Bosch / Milwaukee), diameter range, length range, and packaging brief.
- We confirm the YG8C full-carbide head, joining method, body construction and packaging for the order.
- Sample run produces 3-5 representative diameters with full inspection package; physical samples shipped to buyer.
- Buyer verifies dimensional, runout, life test data, and tactile feel under representative drilling conditions.
- Spec lock and pre-production sign-off on a 50-200 piece first batch before bulk schedule starts.
Spanish-speaking and Latin-American buyers source this program as brocas SDS-Plus de cabeza de metal duro macizo para hormigón armado — solid carbide head SDS-Plus bits for reinforced concrete and rebar (armadura). Fabricamos con marca propia del distribuidor.
RFQ Checklist
- Diameter range and length range (12-size opener vs core 6-25 mm vs custom).
- We confirm the YG8C full-carbide head, joining method, body construction and packaging for the order.
- Surface treatment: standard, shot-peened flutes (Iron Blast equivalent), TiN body.
- Marking: laser shank marking (size, brand, batch code, approved SDS interface drawing reference).
- Packaging: bulk, PVC pouch, plastic case, blister card, color sleeve, master carton spec.
- Inspection records required (carbide grade, hardness, runout, life test, hole diameter wear).
- Quantity per SKU and reorder cycle.
Build a Premium-Tier SDS-Plus Line With Full Carbide Head Construction
Send your target benchmark brand, diameter range, carbide grade preference, and packaging brief. We will reply with a sample plan, inspection record set, and OEM quotation path.
Request Full Carbide Head Quote
