77055308260 Mantle for Metso HP300 | Crusher Wear Parts

77055308260 Mantle for Metso HP300 — What You Need to Know

The mantle is the moving wear component that sits on the main shaft head of a cone crusher. On the HP300, part number 77055308260 is a mantle designed to fit the medium-to-coarse cavity configuration. It gyrates eccentrically against the stationary bowl liner (concave), creating the crushing action that reduces rock from roughly 200mm feed down to 20-40mm product.

We’ve been casting mantles for Metso HP series crushers for over 40 years. This particular part number comes up a lot — the HP300 is one of the most popular mid-range cone crushers in quarrying and aggregate production across Australia, Southeast Asia, and South America.

Part Number & Specifications

Part Number: 77055308260
Machine: Metso HP300 cone crusher
Part Type: Mantle (moving cone liner / 动锥衬板)
Cavity Range: M/C/EC (Medium / Coarse / Extra Coarse)
Material Options: Mn13Cr2, Mn18Cr2, Mn22Cr2 (upon request)

The HP300 mantle 77055308260 is a substantial casting — typically running 280-340 kg depending on the cavity profile. The outer surface features corrugated ridges that grip and compress rock as the head gyrates. These ridges are what actually do the work, and they’re what wears down over time.

Dimensionally, this mantle is machined to match OEM specifications. The bore, the top diameter, the bottom skirt profile — all within ±0.5mm of original Metso drawings. We’ve had customers send us their old mantles for measurement, and our castings line up consistently.

Application — Where the HP300 Runs

The Metso HP300 sits in the secondary or tertiary crushing stage. You’ll find it in:

• Hard rock quararies — granite, basalt, gabbra. This is where mantles wear fastest. We’ve seen Mn13 mantles last 6-8 weeks on granite in Queensland before needing replacement.
• Iron ore mining — Western Australia Pilbara operations run HP300s in tertiary duty. The ore is abrasive but not extremely hard, so Mn18Cr2 gives a solid lifespan here.
• Recycling concrete and demolition waste — tramp metal is the enemy here. We always recommend checking for steel contamination in the feed.
• Sand and gravel production — relatively gentle application. Mantles tend to last longer here, sometimes 12-16 weeks on Mn13.

The HP300 is also commonly paired with an HP500 or HP400 in a multi-stage crushing circuit. If you’re running multiple Metso cones, the wearing pattern on your mantles tells you a lot about how the circuit is performing overall.

Material & Features — Why Manganese Grade Matters

The material choice for your HP300 mantle directly affects how long it lasts and how consistently it performs. Here’s what we typically see in the field:

Mn13Cr2 (13% manganese, 2% chromium) — The standard workhorse. Good initial hardness (HB 200-220), excellent work-hardening capability. Best suited for medium-hard rock and situations where impact is moderate. Most of our HP300 mantle orders ship in Mn13Cr2.

Mn18Cr2 (18% manganese, 2% chromium) — Higher manganese content means better work-hardening under heavy compression. If you’re crushing hard, abrasive rock like basalt or quartzite, this is what we recommend. We had a customer in South Africa who switched their HP300s from Mn13 to Mn18Cr2 and saw roughly 35% longer wear life on andesite. The upfront cost is about 15% higher, but the cost-per-ton crushed dropped significantly.

Mn22Cr2 — Available on request for extreme applications. Higher manganese with chromium carbide microstructures. Typically used in mining operations where downtime for mantle changes is extremely expensive.

One thing we’ve learned from four decades in this business: the casting quality matters as much as the material grade. A poorly cast mantle with porosity or inclusions will crack prematurely regardless of how much manganese you put in it. Our foundry uses resin sand molding with controlled cooling rates. Every casting goes through magnetic particle inspection before machining. We catch the defects before they reach your crusher.

Why Choose Our Aftermarket Mantle

We’re a 40-year-old foundry in China that specializes in crusher wear parts. Here’s what that means for you practically:

• OEM dimensions guaranteed. We machine to Metso’s original drawings. If it doesn’t fit, we replace it — no arguments.
• Consistent supply. We stock common HP300 mantle patterns and can ship within 2-3 weeks for standard orders. Emergency orders can be faster.
• Material flexibility. Need Mn18Cr2 instead of Mn13? We pour it. Need a custom cavity profile for a specific feed gradation? We can modify the pattern.
• Price advantage. Typically 30-40% less than genuine Metso parts, with comparable or better wear life in most applications we’ve tracked.
• Technical support. If you’re not sure which cavity profile or material grade fits your application, we’ll help you figure it out. We’ve done this for hundreds of quarries worldwide.

Let’s Talk About Your Application

If you’re running Metso HP300s and looking for a reliable aftermarket mantle supplier, drop us a line. Tell us what you’re crushing, what your current wear life looks like, and what part numbers you’re buying. We’ll tell you honestly whether our parts make sense for your situation.

Part number 77055308260 is one we manufacture regularly — it’s not a special order item. If you need a quote, feel free to reach out at benny@crusherwearparts.cn or visit our website at www.crusherwearparts.cn.