Locking Bolt 1019559606 for Metso HP400 Cone Crusher

The Locking Bolt (Part Number 1019559606) is a safety-critical fastener engineered exclusively for the head assembly of the Metso Nordberg HP400 Cone Crusher.
Situated at the apex of the crushing chamber, this high-strength bolt secures the locking nut assembly and feed cone.
While the head nut provides the primary clamping force for the mantle, this locking bolt acts as the essential secondary retention device, preventing the assembly from loosening under the intense vibration and gyratory motion of the crushing cycle.

Failure of this specific crusher spare part can lead to the detachment of the feed plate, exposing the expensive head nut to direct rock impact and rapid wear.
As a specialized HP series crusher parts supplier, we stock these bolts in premium Grade 12.9 alloy steel to ensure they survive the harshest mining environments.

Core Engineering Advantages

Generic fasteners cannot withstand the “hammering” effect found in the crushing chamber. Our OEM-spec bolts are designed for fatigue resistance.

• Superior Tensile Strength: Manufactured from 42CrMo4 (AISI 4140) or equivalent high-alloy steel, heat-treated to Grade 12.9 standards (Tensile Strength ≥ 1220 MPa).
  This ensures the bolt does not stretch or shear under peak impact loads.
• Impact Resistant Design: Features a rolled thread profile (rather than cut threads) which preserves the steel’s grain structure, increasing fatigue life by 30% against high-frequency vibration.
• Corrosion Protection: Coated with a heavy-duty black oxide or zinc-flake finish to prevent rust seizure, ensuring the bolt can be removed easily during scheduled liner changes without cutting.

Technical Specifications

The following table outlines the parameters for this critical fastener.
Please verify the part number against your HP400 parts manual.

Field Diagnosis: When to Replace?

Because this bolt is removed during every mantle change, it is subject to wear and fatigue.
Inspect for these failure signs:

• Thread Stretching (Necking): Run a fresh nut down the bolt threads by hand.
  If it binds or feels loose in specific spots, the bolt has yielded (stretched) and lost its clamping ability.
  Replace immediately.
• Head Rounding: If the hex head corners are rounded off from impact or improper tool usage, you will not be able to apply the correct torque.
• Impact Damage: If the bolt head shows deep gouges from rock impact (due to a worn feed plate), its structural integrity is compromised.

Expert Installation Advice

Torque is Everything: The 1019559606 Locking Bolt must be tightened to the exact OEM torque specification (refer to your HP400 manual).

Pro Tip: Apply a high-pressure Molybdenum Disulfide (MoS2) anti-seize paste to the threads before installation.
This prevents “thread galling” caused by the immense friction and heat generated in the crushing head, ensuring you can remove the bolt safely during the next service shutdown.

Secure your crushing circuit today.
Contact our technical team to check stock for the HP400 Locking Bolt (1019559606).