M-22 to 1-1/4-7 Thread Adapter for Drill Core Bits | 2-Pack

2-Pack M-22 Male to 1-1/4-7 Female Thread Adapter for Drilling Rigs

Bridge the gap between metric and imperial threading standards with this precision-engineered set of two drill core bit thread adapters. Designed for professional construction sites, mining operations, and heavy-duty drilling rigs, these adapters convert Beijing M-22 male threads to US 1-1/4-7 female threads — allowing seamless equipment integration without costly interface workarounds.

Key Features

• Bidirectional Thread Compatibility: Converts M-22 male threads to 1-1/4-7 female threads, eliminating interface mismatches between metric and imperial drilling equipment.
• High-Precision Machining: Manufactured using precision turning processes for clean thread profiles and tight engagement, ensuring a secure, slip-free connection with efficient torque transmission.
• Heavy-Duty Alloy Steel Construction: Crafted from high-strength chromium alloy steel with a hardened surface treatment for outstanding wear resistance and extended service life in high-intensity environments.
• Tool-Free Quick Change: Compact design allows fast tightening and removal without additional tools — ideal for frequent drill bit changes on active job sites.
• Built-In Safety Design: Features anti-slip grooves, hex wrench slots for manual tightening, and an internal stop structure that prevents over-tightening to protect both the machine tool and drill bit threads.

Specifications

• Product: Water Drilling Rig Thread Adapter (2-Pack)
• Thread Conversion: M-22 Male → 1-1/4-7 Female
• Material: Chromium Alloy Steel
• Color: Black
• Sizes: Approx. 85 mm / 3.35 in & 114 mm / 4.48 in
• Suitable For: Drilling rigs, core bit setups, construction and mining drilling applications
• Country of Origin: Made in China

Package Contents

• 2 × Water Drilling Rig Thread Adapter

Important Notes

• Actual color may vary slightly from images due to monitor brightness and lighting conditions.
• Please allow slight measurement deviations (±1–2 mm) due to manual measurement.

Authoritative Resource

For workplace safety guidelines when operating drilling machinery and heavy construction equipment, refer to the U.S. Occupational Safety and Health Administration (OSHA) — Drilling Safety Standards.

Frequently Asked Questions

Q: What thread sizes does this drilling rig thread adapter convert between?

A: This adapter converts an M-22 male thread (metric, commonly used in Beijing-standard drilling equipment) to a 1-1/4-7 female thread (US imperial standard), making it compatible with a wide range of international drilling rigs and core bit setups.

Q: What material is this thread adapter made from, and how durable is it?

A: The adapter is made from high-strength chromium alloy steel with a hardened surface treatment, engineered for excellent wear resistance and a long service life under high-intensity drilling conditions such as construction and mining operations.

Q: Do I need special tools to install or remove this M-22 to 1-1/4-7 adapter?

A: No special tools are required for most operations. The adapter features anti-slip grooves and hex wrench slots for easy manual tightening. An internal stop structure also prevents over-tightening, protecting your equipment during frequent drill bit changes.

Q: How many adapters are included in one order?

A: Each order includes 2 adapters — one measuring approximately 85 mm (3.35 in) and one measuring approximately 114 mm (4.48 in), giving you two size options for different drilling rig configurations.