Torch Ring Suitable for Metso HP500 Cone Crusher Part ONA-1063915668

Product Overview
The torch ring, also known as the burning ring or spacer ring, is a sacrificial component installed between the mantle and the head nut in the mantle locking assembly. Its primary engineering function is to facilitate the safe removal of worn liners. During operation, the crushing action self-tightens the head nut to immense torque levels; the torch ring is designed to be flame-cut during maintenance, instantly relieving this axial tension and allowing the nut to be spun off without damage to the spindle threads. When it is time to replace the mantle, the torch ring is designed to be flame-cut. By cutting through this ring, the locking pressure is released, and the mantle can be removed without damaging the expensive head nut or the main shaft.

One Part, Multiple Sizes

The ONA-1063915668 torch ring is a precision-engineered replacement component designed specifically for cone crushers suitable for Metso HP500, weighing 19 kilograms. Torch rings vary in size and weight depending on the crusher model. For example, the HP200 torch ring weighs approximately 4.8 kg, while the HP300 has two different options at 5.88 kg and 6.49 kg. The HP400 ring is about 6.01 kg, and the HP500 ring is the heaviest at 19 kg. For HP4 models, there are two options available at 5.3 kg and 5.6 kg. After each use, the ring must be replaced. It is a one-time consumable part, yet it protects components that cost many times more.

Full Series Coverage
ONA's torch ring coverage extends far beyond HP500. We supply torch rings suitable for Metso's entire cone crusher range, including the HP series (HP100 to HP800), GP series (GP100 to GP550), MP series (MP800, MP1000, MP1250), as well as the SG series gyratory crushers and legacy models such as the Omnicone 937 SX. No matter the model or the series, if you provide the original part number, ONA can supply the correct torch ring for your crusher. Below are some of the torch ring part numbers currently in ONA's stock:

Product Advantages

Flame-Cuttable Metallurgy

The ONA-1063915668 torch ring is manufactured from low-carbon steel (AISI 1020 / AISI 1045) rather than manganese steel. This ensures the ring can be sliced easily with an oxy-acetylene torch without the hardening issues associated with other materials. The clean, fast cut reduces mantle removal time significantly and prevents damage to the expensive locking nut and main shaft threads.

Sacrificial Protection

The torch ring acts as a thermal and mechanical buffer, preventing the head nut from cold-welding to the mantle under the extreme pressure of self-tightening forces. By providing a sacrificial gap, the ring ensures the flame of the cutting torch is kept at a safe distance from the reusable locking nut and the threaded spindle. This single-use component protects parts that cost many times more than the ring itself.

Precision Fitment

Each ONA torch ring is precision-machined to strict tolerances to ensure square contact between the mantle and the head nut. Uneven contact surfaces can cause the head nut to loosen during operation, leading to catastrophic mantle spinning. ONA's precise manufacturing eliminates this risk, ensuring stable crusher operation and extended equipment life.

Applications
The ONA-1063915668 torch ring is specifically designed for cone crushers suitable for Metso HP500, which is a versatile rock crushing machine often used in aggregates production, quarrying applications, and mining operations on secondary, tertiary, or quaternary crushing stages. During routine mantle replacement – whether due to normal wear or after a tramp iron event – the torch ring must be flame-cut and replaced with a new one. ONA recommends keeping spare torch rings in inventory to avoid delays during scheduled maintenance. The torch ring should never be reused; once flame-cut, its structural integrity is compromised, and it cannot provide proper preload or sealing.

Torch Rings for Other Brands

In addition to HP series torch rings suitable for Metso, ONA also supplies high-quality torch rings for a wide range of other major cone crusher brands, including suitable for Sandvik (often referred to as burning rings), suitable for Symons, suitable for Telsmith, and suitable for Trio. For models not listed or for custom requirements, ONA offers manufacturing based on customer drawings or original part numbers.

FAQs

Q1: Can I reuse a torch ring after flame cutting?

No. The torch ring is designed to be destroyed during removal. After flame cutting, it cannot be reused. Always replace it with a new ONA torch ring every time you change the mantle.

Q2: What happens if I skip replacing the torch ring?

If you reuse an old torch ring, it may not provide the correct preload or may crack under torque. This can cause the mantle to loosen during crushing, leading to uneven wear, reduced crushing efficiency, and possible damage to the head nut and main shaft threads. Always use a new torch ring for reliable mantle locking.

Q3: Is the ONA-1063915668 torch ring compatible with other HP series crushers?

The ONA-1063915668 is specifically designed for the HP500 model. ONA manufactures torch rings for the entire HP series, including HP200, HP300, HP400, HP4, and HP6. Please confirm your crusher model and original part number before ordering to ensure correct fitment.