Choosing the Right Drill Rods for Canadian Ground Conditions
S135 vs. Grade 5 — which drill rod is right for your operation? We break down the differences and explain when to upgrade for Canadian rock and abrasive soil conditions.
Drill rod selection is one of the most important — and most overlooked — decisions in HDD. Using the wrong grade of rod for your ground conditions is one of the leading causes of rod failure, lost tooling, and costly fishing jobs.
Understanding Rod Grades
Drill rods are rated by their steel grade, which determines tensile strength, torque capacity, and fatigue resistance. The most common grades you’ll encounter are Grade 5, Grade 8, and S135. Grade 5 is entry-level and suitable only for soft, benign ground conditions. Grade 8 is the standard for most utility work. S135 is the premium grade — one-piece forged construction with the highest torque and tensile ratings available.
When to Use S135 in Canada
If you’re drilling in glacial till, fractured rock, river cobbles, or any abrasive formation — S135 is the right choice. The higher upfront cost is insignificant compared to the cost of a twist-off in difficult ground.
Wolf Machinery stocks one-piece forged S135 drill rods in standard and custom lengths for all major HDD makes. Contact our Canadian team for pricing and availability.