Carbide Tunneling Teeth

Carbide Tunneling Teeth — TBM & Shield Machine Supplier

Ruixin tunneling teeth are tungsten carbide cutting tools for shield tunneling machines and roadheader cutterheads operating in medium-hard to hard rock and mixed-face formations. Designed for impact toughness and stable wear performance, manufactured to consistent grade specifications for predictable service life in demanding tunneling conditions.

Quick Grade Selection by Formation

Formation / UCS	Recommended Grade	Key Advantage
Medium-hard rock (EPB shield)	SS16CB / SS18CB	Balanced hardness + toughness for shield cutter heads
Hard rock / mixed face	SS20CB / SS15CT	High wear resistance with impact toughness in hard formations
Complex geological structure	SS18CC / SS20CC	Maximum toughness for variable strata
Hard rock drilling (DTH/rotary)	SS12C / SS16C	High hardness for abrasive hard rock penetration

Full Grade Specifications

Grade	Density (g/cm³)	Hardness (HRA)	TRS (MPa)	Grain (μm)	Application
SS12C	14.95±0.05	90.0±0.5	≥2900	2.0–2.4	Impact bit, DTH bit — medium/hard rock
SS16C	14.70±0.05	88.5±0.5	≥2600	2.4–3.2	Percussive rotary, oil well bit inserts
SS20C	14.50±0.05	87.5±0.5	≥2800	2.4–3.2	Mining bit, roller bit
SS16CB	14.70±0.05	87.5±0.5	≥2200	4.0–6.0	Shield machine cutter head & engineering pick
SS18CB	14.60±0.05	87.0±0.5	≥2400	4.0–6.0	Shield machine cutter head & engineering pick
SS20CB	14.50±0.05	86.5±0.5	≥2600	4.0–6.0	Shield machine cutter head & engineering pick
SS18CC	14.60±0.05	86.5±0.5	≥2600	7.0–8.0	Complex geological structure picks
SS20CC	14.50±0.05	85.5±0.5	≥2800	7.0–8.0	Complex geological structure picks
SS15CT	14.77±0.05	86.5±0.5	≥2800	8.0–8.5	Heavy-duty shearer & roadheader — hard/complex strata
SS16CTA	14.72±0.05	86.3±0.5	≥2800	8.0–8.5	Heavy-duty shearer & roadheader — hard/complex strata

Custom alloy composition available. Send formation data for grade recommendation.

Why Ruixin

• ISO-certified manufacturer — 14,200m² facility, Jinan, Shandong, China
• 12+ years cemented carbide production, 500 tonnes/year capacity
• Material test reports with every shipment — HRA, density, grain structure verified
• OEM tooth geometries accepted — custom dimensions to your cutterhead drawings
• Sample orders for qualification before bulk project supply
• Factory-direct pricing, no trading company markup

Request a Quote

Provide formation data (UCS, abrasivity index) and cutterhead type to info@ruixintungstencarbide.com or WhatsApp +86-15253178777. Grade recommendation and lead time confirmed within 24 hours.

Frequently Asked Questions

What carbide grade should I use for EPB shield tunneling in mixed-face ground?

For EPB (Earth Pressure Balance) shield machines in mixed-face conditions, we recommend SS16CB or SS18CB grades — these offer a balance of hardness and toughness that handles transitions between soil, gravel, and soft rock. For harder or more abrasive formations, SS20CB or SS15CT provides higher wear resistance with maintained impact toughness. Send us your UCS data for a specific grade recommendation.

Can you supply tunneling teeth to match our existing cutterhead drawing?

Yes. We accept 2D drawings, DXF files, or physical samples to replicate your existing tooth geometry. Custom shank diameter, cone angle, tip profile, and brazing surface are all available. Send your drawing for a quotation within 24 hours.

What is the MOQ and lead time for tunneling teeth?

Sample orders of 20–100 pieces are accepted for qualification. Bulk orders typically start from 500 pieces. Lead time is 5–7 days for samples and 3–5 weeks for production quantities. Project-based scheduling is available for large tunneling contracts.