5 1/2 Inch IADC 537 Tricone Rock Bit for Medium-Hard Formations

The 5 1/2" (139.7mm) IADC 537 tricone rock bit is a premium tungsten carbide insert (TCI) drilling tool engineered for reliable performance in soft to medium-hard formations. Designed to meet API standards, this roller cone bit combines an optimized cutting structure, robust bearing system, and durable gauge protection, making it the ideal choice for water well drilling, oil & gas exploration, geothermal projects, and civil engineering drilling operations.

Product Description

Parameter	Specification	Parameter	Specification
Bit Size	5 1/2" (139.7mm)	IADC Code	537
Bit Type	TCI (Tungsten Carbide Insert) Tricone Bit	Connection	3 1/2" API Regular Pin
Bearing System	Precision Journal Bearing	Seal Type	High-Performance Elastomer Seal
Recommended Weight on Bit (WOB)	0.35 - 1.05 kN/mm	Recommended Rotary Speed (RPM)	40 - 110 r/min
Nozzle Configuration	3 Replaceable Nozzles	Circulation Medium	Drilling Mud / Air / Foam
Body Material	High-Strength Alloy Steel	Net Weight	Approx. 32-35 kg
Application Formation	Soft to Medium-Hard Rock (Shale, Sandstone, Limestone)	Standard Compliance	API Spec 7

Core Advantages

Fast ROP & Long LifeOptimized tungsten carbide insert arrangement ensures efficient rock crushing and high wear resistance. Perfect for shale, sandstone, and limestone, it delivers fast penetration rates and extended bit life.
Reliable Sealed BearingsPrecision-machined, silver-plated bearings with Buna-N seals prevent drilling fluid contamination. The built-in compensator ensures stable lubrication for tough, high-load operations.
Superior Gauge ProtectionReinforced shank and gauge area with hardfacing reduces wear, maintains wellbore size, and prevents undergauge issues.
Wide ApplicationIdeal for water well drilling, oil & gas exploration, geothermal wells, foundation piling, and HDD projects.

Use & Cost Benefits

Proven ROI: Extended bit service life cuts trip time and labor costs.
Global Compatibility: Meets API standards, fits all standard drilling rigs.
Consistent Quality: Every bit undergoes strict factory testing before shipment.
Bulk Order Discounts: Competitive pricing for large project requirements.

Custom & Supply Capabilities

Customizable Designs: Tailor tooth profile, nozzle size, and connection to your project.
Reliable Delivery: Stable production capacity ensures on-time shipment worldwide.
Expert Support: Our engineering team provides free bit selection and drilling parameter advice.
After-Sales Service: Fast response for technical issues and replacement support.

Bit Selection Guide

Not sure if this IADC 537 bit is right for your project?

For softer formations: Choose lower IADC codes (e.g., IADC 437) for faster ROP.
For harder formations: Opt for higher IADC codes (e.g., IADC 637) for better wear resistance.
For specific conditions: Contact our team for a customized bit recommendation based on your formation data.

Raw Materials

Our tricone bits are built with certified high-strength alloy steel, rigorously tested for strength and durability. Premium raw materials guarantee reliable performance in the toughest drilling conditions.

5 1/2 Inch IADC 537 Tricone Rock Bit for Medium-Hard Formations