Import 25mm Pilling Bullet Teeth C31hd — Buy in wholesale FOB from Supplier in China

The C31HD is a 25mm pilling bullet tooth built for rock wheel trencher and concrete drilling operations, manufactured by Xi'an Tydrillbits Co., Ltd from Shaanxi Province, China. It features a 12mm tungsten carbide tip brazed onto a 42CrMo steel body produced by forging, with an overall bullet length of 118mm, head diameter of 33mm, and head length of 61mm. The carbide tip itself measures 22mm in length, giving it a substantially longer cutting profile than the standard C31 variant. These dimensions position the C31HD for aggressive penetration in solid rock and reinforced concrete rather than softer soils or mixed ground conditions.

The material pairing of tungsten carbide with 42CrMo alloy steel follows standard practice in the foundation drilling industry, where tip fracture and body wear are the dominant failure modes. The 42CrMo grade provides the fatigue resistance and toughness needed to withstand percussive loading in rotary drilling, while the larger 12mm carbide diameter (versus 9mm on the C31) extends wear life in abrasive conditions. Forging rather than casting the steel body refines grain structure and improves directional strength under torsional stress. Buyers should note that while the source lists plastic box packaging, it does not specify carbide grade subclass, braze alloy composition, or hardness values, all of which affect field performance.

Applications for this tool span hard rock drilling, reinforced concrete removal, and tunnel boring with rubber tire and rock wheel trenchers. The C31HD designation indicates it belongs to the C31 series but with heavy-duty specifications suited to more demanding ground conditions than standard C31 bits. Importers sourcing from Xi'an Tydrillbits should confirm minimum order quantities, lead times, and whether the supplier provides companion holders or retainer rings for their tooling system. They should also verify if carbide tips are sharpened or flat-faced, and whether the supplier offers test certificates for material composition or batch hardness testing.

Xi'an Tydrillbits Co., Ltd is located at 11 Dianzi 3rd Road, Yanta District, Xi'an, Shaanxi Province, with postal code 710061. The company's trust tier is classified as harbor, though its response rate shows 0.00 percent and average response time registers zero hours, indicating limited or no response activity on the platform through which this listing appears. The supplier address places it in an established industrial district of Xi'an, a city with significant manufacturing infrastructure and transport links to eastern ports.

The listing provides no information about factory size, annual output, years in operation, specific quality certifications, export history, or clientele. What the source does confirm is that the supplier produces forged drilling tools with tungsten carbide inserts and offers product-specific dimensional data. Buyers should treat unverified claims with caution and conduct direct due diligence, including requesting material test reports, sample evaluation, and references for prior export shipments before committing to volume orders.