What This Product Does

The 1304 general PDC cutters are 13.04mm diameter standard-grade diamond composite inserts manufactured for general-purpose well drilling and coal mining bit construction. The general designation indicates a cost-effective product line that meets standard performance requirements without the premium-grade quality controls of the high-class 1304 line. These cutters serve the majority of drilling applications where formation conditions are within normal ranges (15-50 MPa, moderate abrasiveness) and cutter cost per bit is a significant factor in the overall drilling budget.

Key Features & Technical Specifications

Cutter diameter: 13.04mm. Table geometry: flat. 

Diamond layer thickness: 1.0-1.2mm. Substrate: tungsten carbide with 6%-8% cobalt. 

Hardness: HRA >80. Thermal stability: up to 700 degrees C. 

Impact resistance: rated for medium impact. Braze interface: standard planar. 

Surface flatness: within 0.05mm (standard production tolerance). 

Quality control: batch sampling (not 100% inspection like high-class grade). Available in standard and thermally stable grades.

Performance Advantages

In standard coal mining formations at 15-45 MPa, 1304 general cutters deliver performance comparable to higher-priced cutters for the first 60-70% of service life, with divergence occurring mainly in the final wear stage where premium cutters maintain cutting efficiency longer. For coal mines drilling in relatively uniform seams without hard inclusions, the general grade provides the best cost-per-meter value because the premium quality margin is not fully utilized. At 20-30% lower unit cost than high-class cutters, the 1304 general grade reduces per-bit construction cost by 12-18% for bit manufacturers assembling standard-specification products for the mining market.

Application Scenarios

Standard coal mining bit construction for mines with moderate and uniform seam conditions. Water well bit manufacturing for sedimentary formations. General-purpose drilling bit repair and refurbishment. Bit manufacturers producing cost-competitive product lines. For applications requiring premium quality and guaranteed bond integrity, the 1304 height class PDC Cutters well drilling Tool inserts for coal mining provides 1304 high-class cutters with 100% ultrasonic bond inspection and tighter flatness tolerances. Oil and gas well surface hole bits in soft to medium formations.

Problem-Solving Capabilities

Many coal mines and drilling contractors operate in formations that do not require premium-grade cutters but find that premium cutter prices inflate their per-bit cost unnecessarily. In Shanxi Province, a group of medium-scale coal mines conducted a side-by-side trial comparing general-grade and high-class 1304 cutters on identical 94mm three-wing bits in their standard mining seams (25-40 MPa, low inclusion frequency). The result: general-grade bits averaged 280m life versus 320m for high-class bits, a 12.5% difference, but at 28% lower per-bit construction cost. The general-grade bits produced a 15% lower cost per meter drilled. For mines with over 50 bits in annual consumption, this translates to significant annual savings without meaningfully affecting drilling schedules.

Technical Support & Customization

SUNGOOD TECH can upgrade general-grade 1304 cutters to high-class specifications for specific batches when formation conditions change. Volume discount structures for orders exceeding 1,000 pieces. Standard packing in 100-piece lots for convenient inventory management. Technical specifications and braze recommendations provided with each order.