Our US API RD Tubing Round Threading Inserts are precision-engineered for manufacturing American Petroleum Institute (API) round threads, fully compliant with API SPEC 5B and GB/T 9253 standards. These inserts are specifically designed for high-performance thread turning on oilfield tubing and casing, ensuring reliable, pressure-tight connections in downhole and surface oil & gas applications.
Key Features & Advantages
API Standard Compliance & Precision Profile
Engineered to the exact tooth profile defined in API SPEC 5B, including the 30° flank angles and 1°47'24" taper angle, ensuring thread form, pitch, and taper meet all API requirements.
The insert geometry precisely replicates the round thread profile, including crest and root truncation heights, to guarantee leak-tight connections and mechanical integrity under high pressure.
Optimized for Oilfield Materials & Conditions
Designed for machining high-strength carbon steels, alloy steels, and heat-treated grades commonly used in oilfield tubular goods.
Available in wear-resistant carbide grades with optional coatings (TiN/TiAlN) to withstand the high cutting forces and heat generated in tough oilfield materials, extending tool life in high-volume production.
Accurate Tooth Form & Dimensional Control
Precision-ground cutting edges ensure consistent thread height (hs=hn=0.626P-0.178) and crest truncation (Scs=Scn=0.120P+0.051), meeting the strict tolerance requirements of API threads.
Balanced chip-breaker design promotes smooth chip evacuation, reducing tool wear and preventing built-up edge during continuous cutting operations.
Rugged & Durable Construction
Ultra-fine grain carbide substrate offers excellent toughness and wear resistance, ideal for the heavy-duty cutting required in oilfield component manufacturing.
Engineered to resist chipping and deformation in both continuous and interrupted cuts, ensuring consistent performance from the first to the last part in a batch.
Technical Specifications
Typical Applications
Oil & Gas Tubing/Casing
Manufacturing API round threads for production tubing, casing, and drill pipe.
01
Wellhead Components
Turning threads for high-pressure wellhead equipment and connection fittings.
02
Petroleum Equipment
Machining threaded components for pumps, valves, and other oilfield machinery.
03
Downhole Tools
Producing threaded connections for downhole tools and completion equipment.
04
Usage & Selection Guidelines
Grade Selection
Use high-toughness grades for roughing operations on heat-treated materials.
Choose coated grades for finishing to improve surface finish and wear resistance.
Tool Holder Compatibility
Select a matching tool holder for your insert size and machine interface (BT, HSK, CAT, etc.).
Machining Parameters
Optimize cutting speed, feed rate, and depth of cut based on the specific workpiece material and insert grade. Use high-performance cutting fluids to reduce heat and wear.
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