Raise Boring Drilling Tool

Raise Boring Drilling Tool Raise Boring Drilling Tool And TBM Cutter Factory WhatsApp+8618961670797

10/09/2026

🔩 Custom Raise Boring Drill Pipe — Built for Demanding Ground Conditions

This customer-specific raise boring drill pipe is made from 4330V Mod alloy steel and manufactured entirely in-house — from forging to heat treatment and precision machining. No outsourcing. Full process control. Consistent quality.

Key specifications:
• Material: 4330V Mod
• Tensile strength: >1,100 MPa
• Impact absorption energy: ≥90 J
• Manufacturing process: In-house forging → heat treatment → machining
• Type: Custom-built to customer requirements

Why it matters:
✅ Full control over every critical production step
✅ High strength combined with excellent impact toughness
✅ Designed for reliable performance in tough raise boring applications
✅ Custom manufacturing according to your drawings and specifications

Looking for a reliable raise boring drill pipe supplier for your next project?

Whatsapp 86-18961670797

04/09/2026

Custom Forged Raise Boring Drill Pipe – 4145H & 4330V

Watch our in-house forging process in action.

We manufacture custom raise boring drill pipes in AISI 4145H and AISI 4330V – two high-strength alloy grades widely used for demanding downhole and raise boring applications. 4145H offers excellent ductility, shock resistance, and wear resistance, while 4330V delivers superior hardenability, fatigue strength, and toughness.

What sets us apart:

🔹 All in-house – We forge, heat-treat, and machine under one roof. From open-die forging that creates continuous directional metal grain flow to precise quench & tempering, every step is fully controlled.

🔹 Customized to your specs – Mechanical properties are tailored to meet your exact requirements.

🔹 ASTM A388 compliant – Every forging undergoes ultrasonic examination per ASTM A388 to ensure internal soundness.

🔹 Proven performance – Typical mechanical properties: 4145H delivers Tensile ≥965 MPa, Yield ≥793 MPa; 4330V delivers Tensile ≥1103 MPa, Yield ≥1034 MPa.

If you're looking for reliable, custom-forged raise boring drill pipes with full process traceability, let's talk.

www.jyeternalmetal.com

Maximize Your Raise Boring Potential with a 3m Reamer Head! 🔧Looking for reliable performance and maximum efficiency for...
01/09/2026

Maximize Your Raise Boring Potential with a 3m Reamer Head! 🔧

Looking for reliable performance and maximum efficiency for your next shaft project? A quality 3-meter reamer head is your key to success.

✅ Optimized for Hard Rock: Engineered with robust cutters to handle demanding geological conditions and deliver a high rate of pe*******on .
✅ Flexible & Serviceable: Choose from integral, segmented, or extendable designs to fit your transport and project size requirements .
✅ Proven Performance: Reduce downtime with robust components designed for easy maintenance and long service life .

Don't compromise on your raise boring tools. For a 3m raise, you need a reamer that delivers power, precision, and durability.

26/08/2026

Today I'd like to share a custom-made 42CrMo slide-type root drill bit for a client. The whole drill bit weighs 3500 kg and is forged as one piece. Through forging, the 42CrMo steel's coarse cast grains are broken up, and internal holes and loose spots are removed. This greatly improves its strength, toughness, and fatigue resistance. It passed flaw detection with no internal defects. The metallographic test also fully met the client's requirements. From raw material to finished product, every step is strictly controlled to make sure every piece we deliver is top quality.
https://www.jyeternalmetal.com
#4140 #4340 #4330 #4340

23/07/2026

Raise Boring Drill Pipe

Raise Boring Machine Center Rod – The Core Power Transmission LinkThe center rod is a critical component in the raise bo...
03/07/2026

Raise Boring Machine Center Rod – The Core Power Transmission Link

The center rod is a critical component in the raise boring machine (RBM) drilling system, positioned at the lowest end of the drill string, directly connecting the drill bit to the drill pipe. It fulfills three core missions:

🔹 Power Transmission – Efficiently transfers torque and axial thrust from the drilling rig to the drill bit, driving rock-breaking operations.

🔹 Precision Guidance – Ensures the drill bit follows the predetermined path, guaranteeing borehole accuracy and verticality.

🔹 Media Conveyance – Features a built-in central passage that provides a circulation path for flushing fluid to cool the drill bit and effectively carry cuttings to the surface.

Manufactured from high-strength alloy steel, the center rod delivers an optimal balance of hardness and toughness to withstand complex downhole stress conditions. Certain advanced designs incorporate elongated structures with reinforced stabilizer bars, significantly enhancing torsional strength and minimizing the risk of fracture.

29/06/2026

When it comes to raise boring, the thread connection is the backbone of every drill string.

DI-22 — the internationally recognized standard for raise boring drill rods. Designed with a large helix angle and coarse thread profile, it delivers superior load capacity and exceptional resistance to thread root fatigue.

Because in underground construction, reliability isn't optional — it's everything.

4 Steps to Select the Right Raise Boring Reamer Head – Avoid Costly MistakesSelecting the wrong reamer head can lead to ...
27/06/2026

4 Steps to Select the Right Raise Boring Reamer Head – Avoid Costly Mistakes

Selecting the wrong reamer head can lead to equipment failure, project delays, or even safety incidents. Getting it right from the start is critical.

Here’s a quick 4-step framework I use for reamer head selection:

1. Know Your Rig & Project Basics

Final reaming diameter and depth

Rig's max reaming diameter, torque, and pullback capacity

Drill rod thread type and size (must match the reamer head)

2. Assess Rock Conditions
Rock properties – especially Uniaxial Compressive Strength (UCS) – determine cutter selection and head design. Some heads are rated for UCS up to 1400 MPa. For challenging formations, custom cutter configurations are available.

3. Match Key Head Specifications

Diameter & Weight: Head diameter should equal or slightly exceed target bore size. Weight matters – a 3m head can weigh ~15 tons, and a 5m head over 30 tons. Ensure your rig's pullback capacity covers head + drill string weight.

Cutter Quantity & Type: More cutters for larger diameters. Choose cutter models that match your ground conditions.

Pilot Hole Size: Must align with the head design for smooth lowering and start-up.

4. Consider Structure & Special Solutions

One-piece vs. Modular: Modular heads (with detachable wings) are easier to transport and assemble in confined underground spaces.

Two-stage Reaming: If your rig has limited capacity but you need a large final diameter, multi-stage reaming can get the job done.

22/06/2026

Great time for raise boring cutter procurement? Tungsten carbide prices have dropped significantly.

If you’ve been watching the tungsten carbide market, you know how crazy things have been. Prices surged earlier this year due to supply constraints and export controls from China, which produces over 80% of global tungsten. But now? Carbide powder prices have fallen over 50% from their March peak, currently hovering around RMB 950–1,100/kg.

This shift is creating a real cost advantage window for raise boring cutter buyers. With raw material costs easing, we're seeing a surge in inquiries from mining and tunneling projects globally.

Why Does Your Raise Boring Stem Keep Breaking? 3 Root CausesIf you're in raise boring, you know the nightmare: a snapped...
17/06/2026

Why Does Your Raise Boring Stem Keep Breaking? 3 Root Causes

If you're in raise boring, you know the nightmare: a snapped stem mid-operation. Costly downtime, lost equipment, and safety risks. Here are the three main reasons your stem keeps failing—and what you can do about it.

1. Fatigue from Cyclic Stresses (The Silent Killer)

The stem endures millions of load reversals during reaming. Over time, micro-cracks form at stress points and propagate until failure. Field tests confirm that alternating stress is a primary cause of drill rod breakage. This isn't a sudden overload—it's metal fatigue that creeps up on you.

2. Overload and Bending at Startup

When the reamer head hits uneven rock at the start of reaming, differential bending moments are applied directly to the stem and saver sub. Repeated excessive bending forces create fatigue cracks that eventually lead to catastrophic failure. Uneven cutter contact = uneven stress.

3. Stress Concentration at Thread Connections

The threaded connection between the stem and the drill string is the weakest link. In practice, fractures frequently occur at the threaded joint just above the reamer head—precisely where torque and bending stress concentrate. This is compounded by insufficient make-up torque or misalignment during connection.

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No. 68 Wanquan Road, Zhouzhuang Town, Jiangyin City
Jiangyin
214400

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