Ningbo Fenghua Bolong Machinery Manufacturing Co., Ltd. is one of the leading manufacturers and suppliers of damper resonance mass in China. Please feel free to buy durable damper resonance mass made in China here from our factory. All customized products are with high quality and competitive price.
Core Advantages
Precision Frequency Tuning - Each damper mass is calibrated to a specific resonant frequency - typically 30–70Hz for engine-related vibrations and 10–15Hz for chassis shake. The effective frequency range is determined by the combination of mass value, mounting position, and damping characteristics, ensuring precise attenuation of problem frequencies identified during vehicle development.
Q235 Carbon Steel Construction - Manufactured from structural-grade carbon steel per GB/T 700, providing the density and rigidity required for effective mass tuning while maintaining good machinability and cost-effectiveness. Material certificates and chemical composition verification ensure consistent properties across every production batch.
Zinc-Nickel Alloy Long-Term Corrosion Protection - Electroplated zinc-nickel alloy coating per SMTC 5 100-003-5p-RH43 specification, 8–15μm thickness with silver finish. Neutral salt spray testing per ISO 9227 delivers ≥144 hours to white rust and ≥720 hours to red rust - equivalent to 6–10 times the corrosion resistance of conventional zinc plating at equivalent thickness.
Coating Integrity & Adhesion - The electroplating process ensures uniform coverage across all surfaces - including internal edges, corners, and thread features - with no uncoated areas. Coating adhesion is verified per ISO 2819, with no flaking, peeling, or cracking. Finished surfaces are free from scratches, cracks, porosity, rust stains, or other defects that could affect assembly, safety, or appearance.
Passive Maintenance-Free Operation - No sensors, wiring, or control units required. Once installed, the unit operates without power supply, calibration, or periodic maintenance - providing stable, reliable vibration attenuation throughout the full vehicle service life with no additional failure points.
Flexible Mounting Configurations - Available in custom geometries - cylindrical, block-shaped, or complex contours - to fit specific vehicle package constraints. Mounting features (through-holes, threaded inserts, or welded studs) are machined per customer drawings, enabling direct bolt-on installation without additional brackets or structural modifications.
Full Process Traceability - From incoming material to finished product, each batch is documented with mill certificates, machining dimensional records, coating thickness measurements, and salt spray test reports - ensuring complete traceability from raw material through to final dispatch.
Technical Specifications
|
Parameter |
Details |
|
Product Name |
Damper Resonance Mass - Tuned Vibration Absorption Components |
|
Material |
Q235 GB/T 700 (structural carbon steel) |
|
Manufacturing Process |
Machining/forging → zinc-nickel alloy electroplating |
|
Coating Specification |
SMTC 5 100-003-5p-RH43, 8–15μm thickness, silver finish |
|
Corrosion Resistance (ISO 9227) |
White rust ≥144h; Red rust ≥720h |
|
Coating Adhesion |
Per ISO 2819 - no flaking, peeling, or cracking |
|
Mass Range |
0.5–5.0kg (custom per application) |
|
Operating Temperature |
-40°C to +150°C |
|
Quality Systems |
IATF 16949 certified manufacturing |
Manufacturing Process
|
Stage |
Key Operations |
Quality Gates |
|
Blanking & Roughing |
Q235 bar/forging cutting → rough turning of profile |
Material certificate verification; chemical composition check |
|
Precision Machining |
CNC turning/milling → mounting holes and mating faces |
CMM dimensional verification; surface finish inspection |
|
Surface Preparation |
Cleaning → degreasing → pickling activation |
Surface cleanliness; no oil residue or scale |
|
Zinc-Nickel Plating |
Electroplating → 8–15μm deposit → silver passivation |
Coating thickness (magnetic gauge); coverage uniformity |
|
Final Inspection |
Visual inspection → adhesion sampling → salt spray sampling |
ISO 2819 adhesion; ISO 9227 corrosion validation |
Quality Control
Material Phase
Each batch is accompanied by mill certificates verifying Q235 grade, chemical composition, and mechanical properties. Incoming dimensions are checked to ensure adequate machining stock.
01
Machining Phase
Critical features - overall profile, mounting hole positions, and thread specifications - are verified by CMM per drawing. Surface finish is inspected to ensure proper coating adhesion.
02
Plating Phase
Coating thickness (8–15μm) is measured on each batch using magnetic gauges. Coverage uniformity is visually inspected on all surfaces - including bores, edges, and thread roots. Adhesion testing per ISO 2819 (cross-cut or bend test) is performed on sample basis.
03
Final Release
Salt spray testing per ISO 9227 is conducted on sample basis per batch - confirming ≥144h white rust and ≥720h red rust. Dimensional inspection is performed by CMM on sample basis. Visual inspection is performed on 100% of parts to ensure no scratches, cracks, porosity, peeling, rust stains, or uncoated areas. Full inspection documentation accompanies each batch with traceability to raw material and production parameters.
04
Application Scenarios
Engine Mount NVH Tuning
Installed on engine mount brackets or adjacent structures, these damper masses attenuate engine shake at idle and low-speed operation. By shifting the mount system's natural frequency away from engine firing order harmonics, they reduce structure-borne noise transmitted to the vehicle cabin.
Transmission & Driveline Applications
Tuned masses on transmission housings and differential carriers absorb gear mesh and torsional vibration energy, protecting sensitive driveline components from fatigue damage caused by high-frequency oscillations.
Subframe & Chassis NVH Refinement
Subframe-mounted damper masses target body shake and suspension resonance frequencies. By modifying local modal behavior without extensive structural changes, these components contribute to overall vehicle refinement.
Custom Services
Frequency analysis
Evaluation of your vehicle NVH targets and identification of critical resonance frequencies requiring attenuation
Custom mass tuning
Mass value and geometry tailored to your specific frequency targets (typically 5–30Hz for chassis, 30–70Hz for powertrain)
Mounting interface design
Hole patterns, thread specifications, and mating surfaces per your drawing or assembly interface
Coating validation
Salt spray testing per ISO 9227 and adhesion testing per ISO 2819 on sample basis
Sample support
Prototype quantities for vehicle-level NVH validation and durability testing
Production volume
From pilot runs to high-volume production with PPAP documentation
Whether you need damper resonance masses for engine mount NVH tuning, tuned mass components for chassis refinement, or zinc-nickel plated counterweight assemblies for corrosion-critical underbody applications - our engineering team provides full support from frequency analysis and mass tuning through machining, electroplating, and production delivery.
Contact Us for Your New Project
Hot Tags: damper resonance mass, China damper resonance mass manufacturers, suppliers, factory, Automotive limit stop, Damper Resonance Mass, Heavy Duty Connecting Rod Bushings, press fit blocks and vibration dampers, Press in Block, thin chassis clearance shim for heavy truck axle hub
