The Bone Crushing Machine (The “Marrow Extractor”)

Unlock the Flavor for Soup Bases & Bone Meal

If you are boiling whole cow leg bones for soup stock, you are wasting gas. The water cannot reach the marrow inside. You must crush it.

The PG Series Bone Crusher is built like a tank.

• The Blade Geometry:We use a staggered “Shear” blade design made of heat-treated alloy steel. It doesn’t just cut; it impacts the bone to shatter the structure.
• Adjustable Output:

• For Soup (Pho/Ramen):Set the screen to 20-30mm. This exposes the marrow but keeps the bone large enough to filter out later.
• For Bone Meal/Feed:The spec sheet mentions 178mm. Let’s be real here. To get that fine (powder), you usually need to run the material through the crusher twice or use a secondary colloid mill. This machine gets you 90% of the way there.

📊 Technical Specifications: The “Real” Capacity

Don’t trust the “Max Output” on the sticker. That is for soft material. Here is what you can expect when processing Frozen Bones (-18°C) vs Fresh Meat.

The “Digital Trap”:Competitors will sell you a “Bone Crusher” with a cast iron body. Do not buy it.The Reality: Bone crushing creates massive vibration. Cast iron cracks under shock load. Our frames are welded Carbon Steel or SUS304 (depending on your budget). For food production (Soup/Paste), you must specify the Stainless Steel cladding option to pass GMP audits in Thailand or Vietnam.

⚠️ Maintenance: How to Keep It Alive

These machines eat bones. They vibrate. Things get loose.

1. The Blade Gap (Crusher):The distance between the rotary blade and the fixed blade determines your efficiency. Check this every Sunday. If the gap gets too wide (>2mm), the machine stops “cutting” and starts “chewing.” This generates heat and ruins the bone quality.
2. The Gearbox Oil (Shredder):The dual reducers on the Model 600 take a beating. In the tropical heat of Southeast Asia, standard oil gets too thin. Use High-Viscosity Gear Oil (ISO VG 320). If you hear a whining noise, your gears are grinding dry.
3. The “Uncrushables”:Even though these are beasts, a stainless steel meat hook will destroy the blades. Install a magnetic trap on the in-feed conveyor. It costs $50 and saves a $2,000 blade set.

❓ FAQ: Straight Answers

Q: Can the Bone Crusher handle fresh cow skin (Cowhide)?A: Yes, but it is tricky. Fresh skin is elastic; it wraps around the shaft. You need to sharpen the blades to a “Knife Edge” (sharper angle) rather than a “Crushing Edge.” Tell us if you are processing skin so we can adjust the blade profile at the factory.

Q: Is the Shredder loud?A: The Shredder (low speed) is actually quiet—just a low rumble. The Bone Crusher, however, is loud (90dB+). It sounds like rocks in a blender. You must put this machine in a separate room or build a soundproof enclosure if you have workers nearby.

Q: Can I wash it with a high-pressure hose?A: The crushing chamber? Yes. The motor and gearbox? No. The seals on standard motors are IP55, not IP69K. Wipe the motor with a damp cloth. Blast the crushing chamber with hot water and degreaser.

Q: Why does the Model 600 Shredder have two motors?A: Torque. If one shaft hits a particularly hard femur bone, the dual-drive system ensures it has the power to snap it without stalling the whole machine. Single-motor shredders often jam and require you to reverse them manually.——This is the reliability standard required for 2026 industrial processing.