Shield Cutterhead Teeth

Carbide Shield Teeth — TBM Cutter Head Supplier

Ruixin shield cutterhead teeth are tungsten carbide cutting tools for shield tunneling machine (TBM) cutterheads operating in medium to hard rock formations. Mounted on the cutterhead face, they maintain cutting efficiency through consistent hardness, controlled grain size, and tight dimensional tolerances across production batches.

Quick Grade Selection by Formation

Formation	Grade	Key Property
Medium-hard rock (EPB / slurry shield)	SS16CB	Balanced hardness HRA 87.5 + toughness TRS ≥2200 MPa
Hard mixed-face formations	SS18CB	Improved impact resistance, grain 4.0–6.0μm
Hard rock — maximum wear resistance	SS20CB	Highest wear resistance in CB series
Complex / variable geological structure	SS18CC / SS20CC	Maximum toughness, coarse grain 7.0–8.0μm

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
SS16C	14.70±0.05	88.5±0.5	≥2600	2.4–3.2	Percussive rotary, oil well bits
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
SS18CB	14.60±0.05	87.0±0.5	≥2400	4.0–6.0	Shield machine cutter head
SS20CB	14.50±0.05	86.5±0.5	≥2600	4.0–6.0	Shield machine cutter head
SS18CC	14.60±0.05	86.5±0.5	≥2600	7.0–8.0	Complex geological structure
SS20CC	14.50±0.05	85.5±0.5	≥2800	7.0–8.0	Complex geological structure
SS15CT	14.77±0.05	86.5±0.5	≥2800	8.0–8.5	Heavy-duty shearer & roadheader
SS16CTA	14.72±0.05	86.3±0.5	≥2800	8.0–8.5	Heavy-duty shearer & roadheader

Custom alloy composition available. Provide UCS value and cutterhead design for grade recommendation.

Why Ruixin

• ISO-certified manufacturer — 14,200m² facility, Jinan, Shandong, China
• 12+ years cemented carbide manufacturing, 500 tonnes/year capacity
• Supplies tunneling contractors and TBM manufacturers across subway, railway, and highway tunnel projects
• Material test reports with every shipment — HRA, density, grain structure
• OEM custom tooth geometries to drawing — shank, body, tip dimensions all configurable
• Sample qualification orders accepted before bulk project commitment

Request a Quote

Send your formation data (UCS, abrasivity), cutterhead type, and tooth dimensions to info@ruixintungstencarbide.com or WhatsApp +86-15253178777. Grade recommendation within 24 hours.

Frequently Asked Questions

How are shield cutterhead teeth different from standard TBM disc cutters?

Engineering shield teeth are carbide-tipped picks mounted on the cutterhead face of EPB or slurry shield TBMs for cutting soft to medium rock and mixed-face formations. Disc cutters are used in hard rock TBMs and operate by crushing rather than cutting. Shield teeth are brazed carbide inserts and can be replaced individually, making them more suitable for mixed geological conditions where formation hardness varies.

What UCS range do your carbide shield teeth cover?

Our grade range covers formations from soft soil (UCS <30 MPa) up to hard rock (UCS 120–160 MPa). For formations above 120 MPa, we recommend SS20CB or SS15CT. Send us your geotechnical report or UCS values and we will specify the appropriate grade for your project formation profile.

Can you supply shield teeth for an ongoing tunneling project with phased deliveries?

Yes. We support project-based supply schedules with phased deliveries aligned to your TBM advance rate and tool change intervals. Contact us with your project timeline and monthly consumption estimate to set up a supply agreement.