7055308122 MANTLE EF/F for Metso HP100 | Crusher Wear Parts

Getting Down to Business with the 7055308122 Mantle

Let’s talk about the moving parts. The 7055308122 is a mantle, specifically cast in an Extra Fine/Fine (EF/F) cavity profile. If you’re reading this, you already know where it goes. The mantle sits directly on top of the main shaft head assembly. When the crusher runs, the shaft gyrates eccentrically, pushing the mantle against the stationary bowl liner. That’s where the rock gets crushed. It’s a brutal environment. The mantle takes the brunt of the impact, the abrasion, and the sheer compressive force.

This specific part number is a direct replacement for the Metso HP100 cone crusher. The HP100 is the smallest in the Metso HP series, but don’t let its size fool you. It’s a workhorse. We see these machines all over the place. They’re perfect for secondary or tertiary crushing in mid-sized quarries, or for producing high-quality manufactured sand in smaller aggregate plants. Because the HP100 has a relatively small crushing chamber, getting the right cavity profile is the difference between making a profit and just burning through liner costs.

Why Material Selection Makes or Breaks Your Liner Life

You can have the perfect cavity profile, but if the metallurgy is wrong, the mantle will fail. Most standard mantles are cast in Mn13 (13% manganese steel). It’s tough, it’s reliable, and it’s cheap. But manganese steel relies on work-hardening. It needs high impact to compress the surface layer and get hard. If your application is low-impact but highly abrasive, standard Mn13 will just wear away like a bar of soap.

That’s where we step in with our Mn18Cr2 alloy. By bumping the manganese up to 18% and adding 2% chromium, we increase the initial hardness and deepen the work-hardening effect. After casting, we water-quench our manganese steel to dissolve the carbides, ensuring the matrix is ready to harden under pressure. We had a customer in a Queensland quarry running HP100s in a tertiary circuit. They were crushing hard river gravel and burning through standard Mn13 EF mantles every three weeks. The rock was too abrasive, and the impact wasn’t quite high enough to fully work-harden the Mn13. We swapped them to our Mn18Cr2 alloy. The surface hardened properly right out of the gate, and they pushed that lifespan to over five weeks. That’s a massive drop in downtime and a huge saving on their monthly wear parts budget.

Understanding Premature Wear and Cavity Profiles

A lot of guys call us up complaining that a mantle only lasted a few days. Nine times out of ten, it’s not the part’s fault. It’s the application. The 7055308122 is an EF/F profile. The Extra Fine/Fine cavity has a tight parallel zone and a steep toggle angle. It’s designed to choke-feed smaller material to produce a very tight product gradation, usually for sand or fine chips.

If you are feeding 50mm rock into an EF/F cavity, you are going to have a bad time. Here are the most common reasons we see premature wear on fine cavities:

• Oversized feed: Large rocks will bridge at the top or cause extreme localized wear at the feed point.
• Tramp metal: A rogue piece of drill steel slipping through can wedge in a fine cavity and crack the mantle on the first shift. We’ve seen it split head assemblies in Western Australia iron ore mines.
• Uneven feed distribution: If the rock falls to one side of the chamber, you’ll get a lopsided wear pattern.
• Mismatched bowl liner: A mantle doesn’t work in isolation. Pairing an EF mantle with a worn-out coarse concave drops your efficiency to zero.

Keep your feed gradation strict. For an EF/F mantle on an HP100, your top size feed should really be kept under 30mm. Fix your feed chute or adjust your feed distributor before you blame the steel.

What We Bring to the Table

We’ve been casting crusher wear parts for 40 years. We aren’t just a trading company slapping our logo on someone else’s scrap. We control the chemistry. We control the heat treatment. When you buy this mantle from us, you are getting exact OEM dimensions. It will seat properly on your HP100 head nut without needing a grinder to make it fit. We also have the capability to cast custom alloys. If you’re running a highly abrasive material and need something beyond standard Mn18, we can look at adding titanium carbide inserts or tweaking the carbon content for your specific needs.

We keep a close eye on our castings. Every mantle is ultrasonically tested before it leaves the foundry to make sure there are no hidden subsurface cracks. We’d rather catch a bad casting here than have it break apart in your crusher three weeks from now.

Figuring Out What You Need

Crushing is never a one-size-fits-all game. What works in a limestone plant in India will fail miserably in a basalt quarry in Chile. If you’re looking at this 7055308122 Metso HP100 replacement and you aren’t entirely sure if the EF/F profile is the right move for your current product spec, don’t just guess. Drop us a line. Tell us what you’re crushing, what your feed size looks like, and what your target product is. We’ve probably seen your exact problem before, and we can tell you if this is the right part, or if you need to look at a Medium or Coarse profile instead.

Feel free to reach out if you need a quote or just want to bounce some ideas around about your liner life. We’re always happy to talk shop.