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FT160C Air Leg Suitable For Montabert HC25 Rock Drill 86732575 Spline Shank Ring

Hardened steel, machined to fit. No fluff.

The FT160C Air Leg and 86732575 Spline Shank + Ring Assembly keep your Montabert HC25 rock drill working in tough ground. Hardened steel takes the hits. The ring cuts vibration before it eats your internals. Splines lock in tight, so torque goes where it should—into the bit, not into heat or chatter. Spares that earn their keep in mining, tunneling, and site work.

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FT160C Air Leg Suitable For Montabert HC25 Rock Drill 86732575 Spline Shank Ring
#147
Highlights
Key Advantages
  • Hardened steel that doesn't fold under impact—heat-treated to take repeated blows without mushrooming or cracking.
  • Spline fitment tight enough to eliminate slop in the drive, so you're not losing energy to wobble or premature wear on the chuck.
  • The ring isn't just a spacer. It steadies the shank in the housing, which quiets vibration and keeps adjacent parts from rattling loose.
  • Wear surfaces are deep-hardened, not just case-hardened. That means you can run it longer in abrasive ground before you see material loss.
  • Drop-in compatibility with the HC25—no reaming, no shimming. Same dimensions as the original 86732575 assembly, so it bolts up and runs.
Use Cases
Applications
  • Underground headings where a loose shank means a shift lost. Transfers impact and rotation cleanly in hard rock.
  • Tunnel face drilling—the ring keeps the shank true even when the feed isn't dead straight, so collaring stays accurate.
  • Benching and production drilling in quarries. Withstands dust, grit, and constant hammering without binding.
  • Heavy civil work: bridge abutments, foundations, rock anchoring. Parts that hold up when the drill runs all day.
Specs
Technical Specifications
Air Leg ModelFT160C
Matches DrillMontabert HC25 Rock Drill
Assembly Includes86732575 Spline Shank + Ring
Shank MaterialThrough-hardened alloy steel, ground splines
Ring FunctionSupports shank alignment, dampens vibration
Use InMining, tunneling, quarrying, construction drilling
Details
Detailed Description

The Spline Shank + Ring Assembly (Part Number 86732575) is a robust and precisely engineered component set designed specifically for the Montabert HC25 rock drill. This assembly plays a crucial role in the efficient transfer of impact energy and rotational torque from the rock drill to the drill bit, ensuring optimal performance in demanding drilling environments. Below is a detailed description:

Description

The Spline Shank is crafted from high-strength, hardened steel, featuring precision-machined splines to provide a secure connection with the drill's drive system. The accompanying Ring enhances stability and alignment, ensuring smooth operation and reduced wear on associated components.

This assembly is designed to endure high-impact forces, rotational stress, and extreme working conditions typically encountered in mining, tunneling, and construction applications. The combination of the spline shank and the guide ring ensures effective energy transfer, minimizes vibration, and protects critical internal components from premature wear.

Key Features

  1. Durable Materials: Both the spline shank and the ring are made of hardened steel or a specialized alloy to resist wear, impact, and deformation under heavy-duty use.

  2. Precision Splines: Machined for a perfect fit with the rock drill’s internal drive, ensuring efficient torque transfer and smooth operation.

  3. Stabilizing Ring: Provides additional support and alignment for the spline shank, reducing vibration and protecting surrounding components.

  4. Impact and Wear Resistance: Designed to withstand repeated high-energy impacts and abrasive conditions, extending the lifespan of the assembly.

  5. Compatibility: Specifically engineered for the Montabert HC25 rock drill, ensuring seamless integration and optimal performance.

Applications

  • Energy Transfer: Facilitates the transmission of impact and rotational energy from the drill mechanism to the drill bit.
  • Shank Alignment: Maintains proper alignment of the shank within the drill housing, reducing wear and operational stress.
  • Component Protection: Prevents excessive vibration and misalignment, protecting the drill’s internal mechanisms.

Introduction

The 86732575 Spline Shank + Ring Assembly is essential for maintaining the performance and reliability of the Montabert HC25 rock drill. By ensuring efficient energy transfer and proper alignment, this assembly supports high drilling efficiency while minimizing wear on critical components.

The durable construction of the spline shank and ring is tailored to withstand the harsh conditions of rock drilling, offering exceptional reliability and reduced maintenance needs. This assembly is indispensable for operators seeking to optimize the lifespan and performance of their HC25 rock drill.

Conclusion

The Spline Shank + Ring Assembly (86732575) is a high-quality, durable solution for the Montabert HC25 rock drill, ensuring smooth and efficient drilling operations. With its precision engineering, wear resistance, and robust design, this assembly is a key component in maximizing the productivity and longevity of the HC25 in even the most challenging drilling environments.

FAQ
FAQ
Will this fit my HC25, or do I need to measure something first?
It's machined to the 86732575 OEM dimensions for the Montabert HC25. If your drill calls out that part number, it fits. Still, pull your old shank and count the splines—if the count and diameter match, you're set. Our support can walk you through it if you're unsure.
We drill in fractured rock. How long does the ring last before it gets chewed up?
The ring is hardened through, not just coated. In fractured ground you'll see surface wear eventually, but it holds alignment far longer than a soft ring. Swap the ring when you notice slop in the shank—usually that's well past 300 meters of drilling, but your ground dictates the pace.
Does the assembly come as one piece, or do I get the shank and ring separately?
Ships as the complete 86732575 set—shank and ring together. Install it as a pair so the wear pattern is matched from day one.
We're running wet holes with a lot of fines. Any tips to keep it from binding?
Keep the splines greased, even in wet conditions. A heavy moly paste works better than light oil—it won't wash out as fast. And clean the receiver bore during bit changes; packed fines will side-load the shank.
Can I use this on a modified HC25 with a different rotation motor?
If the chuck end hasn't been modified and the drifter stroke length is stock, it'll work. The spline interface is the key. If your rotation motor changes the chuck, check the spline count and profile against the original HC25 spec before ordering.
What's a realistic lead time to a mine site in West Africa?
It depends on stock when you order. Usually 5–7 working days to a freight forwarder, then courier to site. Air freight gets it there fastest. We'll quote transit times when you give us the consignee details—no guesswork.
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