Metso D100789

Technical & Mechanical Specifications

• Overall External Dimension: 220 mm outer diameter × 110 mm axial height
• Central Mounting Bore Inner Diameter: 42 mm through-hole for M40 mounting bolt assembly
• Static Rated Load Capacity Per Single Unit: 28 kN maximum static bearing load
• Dynamic Vibration Amplitude Tolerance: ±12 mm continuous cyclic displacement
• Operating Dynamic Frequency Bandwidth Compatibility: 6 Hz to 22 Hz standard vibrating screen operating frequency
• Rubber Hardness Grade: Shore A 65 industrial vibration damping hardness
• Elastic Recovery Rate After Full Compression: ≥97%
• Permitted Continuous Operating Temperature Range: -35 °C to +80 °C
• Maximum Allowable Compression Deformation Under Rated Load: 28 mm
• Service Life Rated Cycle Count: 12,000,000 full compression-release vibration cycles
• Chemical Resistance Standard: Resistant to aggregate limestone dust, iron ore particulate, mild industrial washing wastewater
• Single Unit Net Weight: 11.6 kg

Functional Features

1. Dual-layer composite rubber structure with internal reinforced fiber braid inserts to resist lateral shear deformation under horizontal screen vibration
2. Central through-hole mounting design compatible with standard Metso screen frame M40 high-tensile steel fixing bolt assemblies
3. Integrated upper and lower flat steel reinforcement backing plates to evenly distribute compression load across full rubber cross-section
4. High internal damping coefficient suppresses resonance vibration at screen startup and shutdown transient frequency stages
5. Anti-abrasion outer surface textured rubber layer prevents surface wear from accumulated mineral particulate friction
6. Omni-directional elastic deformation capability accommodates simultaneous vertical and horizontal multi-axis screen vibration displacement

Working Principle

Material Composition

• Main Elastic Body: High-tensile natural rubber blended with carbon black anti-abrasion filler and anti-oxidant additives
• Internal Reinforcement Layer: Polyester continuous fiber braided textile insert embedded uniformly inside rubber matrix
• Top & Bottom Load Distribution Plates: 10 mm thick hot-rolled carbon steel plate with rust-proof black oxide surface coating
• Central Mounting Bore Liner: Seamless cold-drawn steel sleeve bonded integrally to rubber central hole to prevent bolt friction wear

Structural Characteristics

• Circular monolithic cylindrical rubber body with symmetrical top and bottom steel backing plates bonded via high-temperature vulcanization process
• Smooth central steel sleeve through-hole running full axial length of isolator for vertical bolt mounting
• Uniform circumferential outer textured anti-abrasion ribbed surface
• Fully integrated vulcanized bonding between rubber matrix and steel components; no mechanical fasteners separating rubber and metal parts
• Symmetric load-bearing geometry ensuring identical elastic stiffness in all horizontal radial directions

Advantage Highlights

1. OEM Metso original spare part with perfect dimensional matching for all corresponding Metso vibrating screen model frames, zero machining modification required during replacement
2. Internal fiber braid reinforcement eliminates premature rubber tearing under high lateral shear mining vibration conditions
3. High static load bearing capacity reduces total quantity of isolators required per screen unit, cutting maintenance spare part stock count
4. Broad 6–22 Hz frequency bandwidth eliminates resonance risk during screen startup and shutdown transient phases
5. Carbon black blended rubber formula delivers superior abrasion resistance against sharp aggregate mineral dust particles
6. Long rated 12 million vibration cycle service life extends maintenance replacement interval and reduces plant production downtime
7. Wide -35 °C to +80 °C operating temperature range adapts to open-air seasonal mining plant environments

Applicable Industries

Installation Requirements

1. Position D100789 isolator vertically between screen moving frame and stationary base frame; align central steel sleeve bore with frame mounting bolt holes
2. Install M40 grade 8.8 high-tensile alloy steel mounting bolt through central bore; fasten upper and lower lock nuts with calibrated torque of 320 N·m
3. Arrange isolator units symmetrically at four corners of screen frame to evenly distribute total equipment static load
4. Clear all mineral dust and debris from contact surfaces between steel backing plates and metal frame before installation to avoid uneven load concentration
5. Maintain minimum 5 mm clearance gap around outer rubber circumference to eliminate contact friction between isolator and surrounding metal frame components during vibration

Usage Precautions

1. Forbid operation if isolator rubber body shows visible radial cracking, steel-rubber delamination or permanent compression set deformation exceeding 5 mm
2. Do not expose isolator to continuous contact with concentrated mineral acid, solvent or heavy oil lubricant; chemical contact breaks rubber vulcanization bonding
3. Conduct quarterly visual inspection of all installed D100789 units for surface abrasion and crack formation during routine plant maintenance shutdown
4. Replace all isolators on a single screen unit simultaneously if one unit suffers failure to maintain uniform elastic stiffness balance across full frame
5. Avoid excessive overloading of screen feed material beyond equipment rated capacity; overload generates irreversible permanent rubber compression deformation