CERATIZIT CTM17-BC / BC20 Carbide Tips for SDS Drill Bits

Does Ceratizit Make SDS Drill Bits, or Carbide Tips for SDS Drill Bits?

Buyers often search Ceratizit SDS drill bit or Ceratizit carbide tip for SDS hammer drill because marketplace listings blur three different things: finished SDS drill bits, carbide tip blanks, and the carbide grade used inside the head. For procurement, that distinction matters.

CERATIZIT is strongest as a hard-material and cutting-tool group. Its public hard-material pages position carbide products for masonry and hammer drill tips, stone working, rods, preforms, and carbide components. Its cutting-tool catalogue also covers HSS drills, solid carbide drills, indexable drills, reamers, and spindle tools. That does not mean every search result labelled “Ceratizit SDS drill bit” is an official finished SDS bit.

The practical buyer interpretation is this: Ceratizit is a carbide-tip benchmark and supplier reference for SDS and masonry drill-bit OEMs. If a seller says “Ceratizit tip,” “BC20,” or “Luxembourg Ceratizit 46000 series carbide tip,” ask for the exact tip grade, dimensions, cobalt percentage, grain class, brazing method, and finished-bit test records. The name alone is not enough.

CTM17-BC and BC20: Grade Code vs Catalog Cross-Reference

In CERATIZIT's official Solutions for stone working catalog, CTM17-BC appears in the "CERATIZIT grade code" column, while BC20 appears as the catalog/ISO cross-reference for that same material. They are not two different carbide grades. Supplier specifications should lead with CTM17-BC and show BC20 only as a cross-reference.

The published values are 8.5% Co, medium grain (1.3-2.5 µm), density 14.65 g/cm³, HV10 1,420, HV30 1,400 and HRA 90.4. The hammer-tip table lists TRS 2,900 MPa for small diameters and 2,800 MPa for large diameters. The catalog's general cross-reference table also shows HC30/BC20 and U.S. code C1; it does not support relabeling the grade as "ISO C1/K20".

Production sits at Mamer, Luxembourg — the legacy Cerametal plant with approximately 1,300 employees, now part of the Plansee Group's Ceratizit Hard Material Solutions division after Plansee took majority ownership in March 2021. Ceratizit sells BC tips as brazing-ready preforms in standardised hammer-drill geometries from 4 mm to 52 mm diameter, plus ANSI and JIS series — not as finished SDS bits. The downstream OEM brazes them onto a chrome-vanadium or Ni-Mo steel body. Hilti has been Ceratizit's largest hammer-drill carbide customer since 1985, an industrial relationship that helped define exactly what BC20 optimises for.

CT4 and 46000: Different Tip Geometries, Not Grades

CT4 is CERATIZIT's one-piece X-form monobloc 4-cutter tip geometry. The metric program covers Ø5-35 mm and is dimensioned by Height a, Height a1, Ø1, Ø2, centre diameter and thickness.

46000 is a different metric centering-tip geometry for conventional 2-cutter heads. It uses a raised 161° centre apex, 105° tip point, 22°30′ clearance and 8° rake, with a published Ø4-52 mm range and PGM conformity.

Both geometries can be ordered in CTM17-BC material. The catalog examples make the hierarchy explicit: CT4-5.00 CTM17-BC and 46000-4.0 CTM17-BC.

The code before the diameter identifies the tip geometry; the final CTM17-BC suffix identifies the carbide grade. BC20 is the catalog cross-reference for CTM17-BC, not a geometry and not an additional material grade.

Availability, origin, mill certificates and lot documentation must be confirmed against the supplier quotation for the specific order; the public catalog alone does not prove Zhonghuan's current stock or incoming-lot documentation.

The Chinese YG Family: A Parallel Ecosystem, Not a Copy

Chinese carbide grades use the YG prefix for straight WC-Co alloys (no TiC or TaC). The number is the cobalt percentage; the suffix letter denotes grain size — C for coarse (2.5–6 µm), X for fine, no suffix for medium. The classification standard is GB/T 18376.1, which formally maps YG codes onto ISO 513 K-class designations, while GB/T 5242 governs rock-drilling hard-alloy tools and the GB/T 3848–3851 series defines the test methods for hardness, density, TRS and porosity.

Five grades dominate Chinese SDS production:

• YG6 (~94 WC + 6 Co, medium grain) — hardest, HRA 90–92, TRS 1,500–1,700 MPa. Used for tile and rotary masonry where impact is minimal.
• YG8 (8% Co medium-grain) — HRA ~89.5, TRS 2,000–2,300 MPa. General masonry.
• YG8C — 8% Co but moves to coarse grain (2.5–5 µm). HRA ~89, HV30 ~1,320, TRS 2,000–2,200 MPa. The Chinese SDS standard.
• YG11C (11% Co coarse) — HRA ~87, TRS up to 2,800 MPa. The rebar-impact and demolition specialist, mirroring exactly what Ceratizit's BC30 does on the European side.

The producer landscape is concentrated. Zhuzhou Cemented Carbide Group (ZCC) — founded 1954, the cradle of the Chinese industry, now a Minmetals subsidiary — and Zigong Cemented Carbide (ZGCC, 自硬), one of the original 156-key-projects-era plants, are the volume leaders for SDS tip blanks. Xiamen Tungsten's Golden Egret subsidiary (GESAC) plus its mining-tool arm Luoyang Golden Egret Geotools position as the premium virgin-powder house. Below these tier-one names sits a long tail of Zhuzhou and Zigong cluster SMEs — Eastern Carbide, Kerui, Jinding and dozens more — which produce the bulk of Alibaba-tier SDS tips at variable quality.

Virgin Versus Recycled: The Hidden Quality Variable

The most important distinction inside Chinese carbide procurement is not the YG number — it is the powder source.

Virgin powder (原生料) comes through ammonium paratungstate from concentrate, with oxygen content typically below 0.2% and tightly controlled iron, silicon and tantalum impurities. Zinc-process recycled powder (再生料 via 锌熔法) is recovered by dissolving scrap WC-Co in molten zinc, distilling the zinc out and remilling the cake. The chemistry is nominally the same and the energy cost is roughly one-third of virgin processing — but oxygen content rises to 0.3–0.5%, iron accumulates with each cycle, and uncontrolled grain growth on successive recycles widens the property scatter. TRS routinely drops 5–15% in zinc-recycled powder versus virgin at the same nominal grade.

BC20 Versus YG8C, Side by Side

These are the two grades buyers most often ask to compare, because their nominal chemistry is almost identical. The differences appear at the microstructure level.

The hardness gap of roughly 80 HV translates into slower abrasive wear against silica and crushed-granite aggregate. The TRS gap of 25–35% at virtually identical cobalt content is the more revealing number, and it is not an artefact of the recipe.

BC20 is technically the finer-grained material — Ceratizit reaches medium 1.3–2.5 µm, while YG8C runs noticeably coarser at 2.5–5 µm — and Ceratizit gets toughness from binder volume and porosity control rather than from grain coarsening, helped by Sinter-HIP densification on every batch and tighter oxygen specification. Industry consensus from drill-bit OEM literature indicates a roughly 2× field-life advantage for BC20 in standardised concrete-drilling tests versus competent virgin-YG8C output, and considerably more versus budget zinc-recycled tips.

The practical conclusion: BC20 is not 'better than YG8C' in any abstract sense. It is more consistent at a slightly finer grain and slightly higher cobalt point, which suits a market that tolerates higher unit cost in exchange for predictable failure rates.

See how TRS, HRA/HV hardness and grain size trade off across YG8C, YG11C and CTM17-BC/BC20 with real figures in our interactive Carbide Grade Decoder.

Who Actually Uses BC20 — and Who Quietly Does Not

Distributor-confirmed users of BC20 are surprisingly few when the question is asked rigorously. Ahlsell's Ironside SDS-Plus and SDS-Max bits are the canonical reference: dozens of Ahlsell.se product pages explicitly state 'BC20 Luxembourg Ceratizit carbide blades, hardness HRA 90–91.5'. Some Jiangsu-based PGM-certified manufacturers are reported as BC-grade users but lack a public datasheet equivalent to Ironside's. Heller, Alpen-Maykestag, DreBo, Diager and Dreps are geographically and commercially likely Ceratizit customers, but none publish the carbide grade source. Treat anything beyond Ironside as 'probable, not confirmed'.

The two largest names in the SDS market do not buy BC20:

• Bosch operates its own carbide production at Ravensburg, Germany — one of three Bosch carbide competence centres alongside Udine (saw blades) and Saint Niklaus (oscillating tools). Bosch's own e-learning materials describe it as 'the only AC manufacturer producing in-house carbide powders and powder blends' and sole owner of the Induction Diffusion Welding (IDS) process used in SDS plus-7X and X5L bits.
• Hilti, despite its 1985 hammer-drill partnership with Ceratizit, formulates its own carbide internally for the TE-CX and TE-YX product families, with manufacturing across Kaufering, Schaan, Thüringen and Kecskemét. How much raw powder still comes from Plansee/GTP is not disclosed.

The implication is that the two highest-volume premium SDS brands have vertically integrated their carbide stack and use BC20 only as a benchmark, not as a supply.

PGM Certification Verifies Geometry, Not Metallurgy

A persistent buyer misconception is that the Prüfgemeinschaft Mauerbohrer (PGM) mark requires Ceratizit BC20 or any specific grade. It does not.

PGM is a German industry association founded in 1978 that certifies a masonry drill bit produces holes within the geometric tolerances that European Technical Assessments require for DIBt- and ETA-approved anchors. The PGM directive (Dok200) checks cutting-tip diameter tolerance, symmetric tip placement, run-out and the manufacturer's quality management system. The PGM FAQ states explicitly: 'performance and tool life are not PGM criteria.' Carbide grade and supplier are agnostic.

The current PGM register lists 18 manufacturers. European holders include Alpen-Maykestag, BBW (Stanley Black & Decker), Bosch Ravensburg, Diager, DreBo, Dreps, Heller and Hilti (Kaufering and Kecskemét). Asian holders include Bosch Power Tools China and Japan's Miyanaga, alongside several Chinese contract manufacturers. The PGM mark was registered as the first EU Certification Mark on 9 March 2018 and is policed against counterfeits — Chinese raids have seized over 56,000 fake bits since 2009.

Beyond Ceratizit: Other European Carbide Suppliers

Three European-based suppliers offer genuine alternatives for stone-working carbide tips:

• Hyperion Materials & Technologies — the legal successor to Sandvik Hard Materials after the 2018 divestiture. Largest non-rival to toolmakers in Europe with sites in Italy (Sinter Sud, Sant'Agata de' Goti) and Germany (AFC Hartmetall). Medium-coarse, coarse and extra-coarse WC-Co grades in the 6–15% Co range are explicitly marketed for 'rotary and percussion rockbits', with the H10F line (10% Co + 0.5% Cr3C2) as flagship for high-temperature cobalt stability.
• Element Six's Hard Materials division — from the 2007 Barat Carbide acquisition, German plant in Burghaun. Covers Softrock Tools for foundation drilling, road planing and recycling.
• Boehlerit (Kapfenberg, Austria) — publishes 40+ grades from 3% Co submicron to 26% Co coarse, with explicit construction-industry positioning.

Outside this list the choices narrow. Sandvik Mining and Rock Solutions still makes its own PowerCarbide range but only sells finished bits, not blanks. H.C. Starck Tungsten Powders (now Masan) is a powder-only supplier. Tigra, Extramet and HAM specialise in woodworking, precision metalworking and PCD respectively. Günther Wirth, often cited historically, was acquired by Ceratizit in August 2012 and is now part of the same group. The practical European universe for OEMs that want SDS tip blanks outside Ceratizit is therefore Hyperion, Element Six, Boehlerit and a handful of smaller specialists — plus Korean and Japanese alternatives (KORLOY, Sumitomo, Mitsubishi, Tungaloy) and the Chinese ZCC/ZGCC/GESAC tier-one plants.

The Technical Grade Selection Framework

Four design variables determine SDS drill bit carbide performance: cobalt percentage, grain size, microstructural cleanliness and joint quality.

TRS rises roughly 50 MPa per 1% Co in the 3–12% range with coarse grain, and fracture toughness rises about 0.5 MPa·m^0.5 per 1% Co, plateauing around 12–15% Co before stiffness loss reverses the trend. This is why YG11C is the rebar specialist — each extra cobalt point buys measurable bending strength and crack resistance against the impulse load of striking embedded steel. Hardness moves the other direction: HV30 falls from roughly 1,700 at 6% Co fine-grain to 1,400 at 8.5% Co medium-grain to 1,200 at 11% Co coarse-grain.

Grain size adds the second axis. Coarser WC means longer crack paths along grain boundaries (deflection toughening), thicker effective cobalt layers between grains (binder-arrest of cracks) and better thermal-shock accommodation. SDS designs almost universally use coarse to medium-coarse grain even at the cost of nominal hardness because single-event impact resistance dominates over fatigue strength in real-world drilling, where unpredictable rebar strikes are the catastrophic failure mode. The opposite holds in pure-rotary tile drilling, which is why YG6 fine-grain still has a market.

Failure modes track directly onto these variables:

• Abrasive tip wear in clean concrete favours lower-Co finer-grain grades (YG6, YG8, BC10).
• Tip chipping on rebar favours higher-Co coarser-grain grades (YG11C, BC30, BC40).
• Brazing joint failure is driven by CTE mismatch (steel ~12, WC-Co ~5–6 × 10⁻⁶/K), cobalt migration into the braze and cyclic fatigue — addressed by joint design, not grade.
• Plastic deformation of cobalt above 600°C in deep anchor holes is mitigated by Cr3C2-stabilised binders like Hyperion's H10F formulation.

The brazing method amplifies these effects. Induction brazing at 700–820°C with silver-based BAg-24 filler runs 12-second cycle times and dominates mass-market SDS production, but produces larger residual stresses from CTE mismatch. Controlled-atmosphere brazing with Ag-Cu-Ti active filler at around 900°C in 10⁻³ Pa atmosphere builds a TiC reaction layer at the carbide interface, reaches shear strengths above 150 MPa and averages roughly 2.5× the joint strength of conventional induction methods. Higher-cobalt grades wet better with silver fillers, but they also lose cobalt to the braze layer if temperature is held too long, leaving a brittle WC-rich skin — a process control issue that sorts premium European production from rushed mass-market work as much as the carbide grade itself.

What the Price Structure Actually Reflects

At the carbide level, a Ceratizit BC20 hammer-drill tip costs roughly 3–6× a comparable Chinese YG8C tip. At the finished-bit level, the European retail premium is 5–15× over imported Chinese bits — the remainder of the gap reflecting brazing quality, geometry tolerance, distribution markup and brand.

This price differential is not all metallurgy. A meaningful share is the QA infrastructure: vertically integrated tungsten supply through Plansee, Sinter-HIP discipline on every batch, traceable batch testing, and the geographic premium of Mamer over Zhuzhou. For an OEM serving DIY chains where bit failure rates drive warranty cost, BC20 is cheap insurance. For an OEM serving construction professionals who already buy by reputation, the same logic applies.

For a tier-three private-label SDS bit competing on shelf price, virgin-powder YG8C from a tier-one Chinese plant — ZCC, ZGCC or GESAC — is the rational specification. The field-life gap to BC20 narrows considerably when the comparison is virgin against virgin, rather than against zinc-recycled cluster output.

Specify the Variables, Not the Brand Name

The instinctive 'BC20 vs Chinese carbide' framing flattens a much more interesting picture. CTM17-BC (catalog cross-reference BC20) is one specific point — 8.5% Co, medium 1.3–2.5 µm grain, HV30 1,400 and TRS 2,800–2,900 MPa by hammer-tip size class — on a continuum that the BC family covers from 4% to 17.5% Co and that the YG family covers in parallel from YG6 to YG15. The right specification depends on three questions: how much rebar will the bit see, how clean is the powder source, and what brazing method does the OEM use. Those three answers determine field life far more than whether the label says BC20 or YG8C.

The most useful insights for buyers come from where the data converges and where it diverges. It converges on the metallurgy: any reputable producer making 8.5% Co medium-grain WC-Co with HIP densification and virgin powder will land within a few HV points and a few hundred MPa TRS of BC20. It diverges on the surrounding industrial system: Plansee's vertically integrated tungsten supply, Ceratizit's batch QA, and the European brazing infrastructure are what make BC20 the predictable choice — not a magic recipe that Chinese producers cannot replicate. Top-tier Chinese plants (ZCC, ZGCC, GESAC) can and do match BC20 chemistry; the gap widens, sometimes dramatically, only when the buyer drops to cluster SME suppliers using zinc-recycled powder with no public oxygen specification.

For practical procurement guidance:

1. Ask for grain-size measurement, oxygen content, density tolerance, HRA range and TRS test method — not just the grade name.
2. Ask whether the powder is virgin, blended or zinc-recycled.
3. Ask whether brazing is controlled-atmosphere mesh-belt or induction and what filler alloy is used.
4. Match the grade to the application: a YG11C tip from a virgin-powder producer with controlled-atmosphere brazing will outperform a BC20 tip with a sloppy induction braze on rebar-heavy demolition work, and a BC05 tip will outperform a YG11C tip in pure rotary tile drilling.

The grade label is the start of the conversation, not the end of it.

Related Procurement Programs

If you are sourcing this product line for a distributor, importer, or private-label channel, these OEM and wholesale programs cover the procurement questions buyers usually ask next.

• SDS Drill Bits Manufacturer & Wholesale Supply for Distributors — OEM and wholesale SDS drill bit supply for importers, distributors, and tool brands: SDS-Plus, SDS-Max, carbide tips, 2-cutter and 4-cutter heads, packaging.
• SDS-Plus Drill Bits for Anchor Bolt Installation in Concrete — Precision SDS-Plus hammer drill bits for mechanical and chemical anchor holes in concrete and masonry.
• SDS Plus Drill Bit Sets Private Label & OEM Packaging — Private-label SDS Plus drill bit set program for retailers, importers, and online tool brands.
• 3-Cutter Full Carbide Head SDS-Plus Manufacturer — OEM / private-label for the one-piece full-carbide 3-cutter (120° Y) geometry.
• Y-Cutter SDS Drill Bits Manufacturer & OEM — the 3-blade 120° Heller-Trijet-class geometry, full-carbide-head only.