T38-89mm Symmetrix Casing System for Tunnel Umbrella Drilling

TUNNELING EFFICIENCY & PACKAGING TIPS:

• Jumbo-Ready Performance: Designed to seamlessly handle the high-frequency impact energy of Epiroc, Sandvik, and Furukawa drifters without thread stripping.

• One-Stop T38 Package: This 89mm casing system perfectly pairs with Bloom’s best-selling T38-Rod-Hex32-R32 drifting rods, ensuring a synchronized feed length on your jumbo.

• Continuous Supply: Since the Ring Bit remains permanently in the tunnel wall, Bloom offers high-volume packaging discounts for replacement Ring Bits to ensure zero blasting delays.

For tunnel contractors battling soft fault zones and collapsing face geology, Bloom's T38-89mm Symmetrix system offers the ultimate tool protection. This heavy-duty system allows your drifting jumbo to drill holes and install 89mm casing tubes simultaneously, turning a risky drilling operation into a secure, predictable step for umbrella pipe-roofing support.

Engineered for full synchronization with standard T38 drill strings, the percussive and rotational energy is locked via a high-strength bayonet coupling. The pilot bit's upper shoulder firmly engages the casing shoe to pull the tube forward while keeping the borehole straight. Integrated internal flushing grooves keep the face clean under high mud or water flow. Once the casing reaches its designated depth, a quick, slight reverse rotation from the drifter unlocks the bayonet joint. You can pull your T38 rod string back smoothly in minutes, leaving the casing and ring bit in the hole to guarantee safe excavation.

Skip the compatibility guesswork. Contact our technical team today to discuss how to match this system with your existing T38 speed rods and drifting jumbos for maximum penetration.