Found 11 matching results
(CN → US)
| HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|
| 8425110000 | Doc | 55.0% | CN | US | 2025-05-12 |
| 8425190000 | Doc | 55.0% | CN | US | 2025-05-12 |
| 8431499050 | Doc | 80.0% | CN | US | 2025-05-12 |
| 8431499095 | Doc | 80.0% | CN | US | 2025-05-12 |
| 8487900080 | Doc | 83.9% | CN | US | 2025-05-12 |
| 8487900040 | Doc | 58.9% | CN | US | 2025-05-12 |
| 7315190000 | Doc | 80.0% | CN | US | 2025-05-12 |
| 7315895000 | Doc | 83.9% | CN | US | 2025-05-12 |
| 8308909000 | Doc | 57.7% | CN | US | 2025-05-12 |
| 8306100000 | Doc | 35.8% | CN | US | 2025-05-12 |
| 8306290000 | Doc | 30.0% | CN | US | 2025-05-12 |
Chain Adjuster
A chain adjuster is a component used in vehicles and machinery with roller chains to maintain proper chain tension. Precise chain tension is critical for efficient power transfer, reduced wear, and optimal performance of the drive system.
Material
Chain adjusters are typically constructed from:
- Steel: High-strength steel alloys are common, providing durability and resistance to wear and deformation.
- Aluminum Alloys: Lighter than steel, aluminum adjusters are used in applications where weight reduction is a priority, such as motorcycles.
- Plastic/Nylon Composites: Found in some lighter-duty applications, offering corrosion resistance and reduced noise.
Purpose
The primary purpose of a chain adjuster is to:
- Maintain Optimal Tension: Compensate for chain stretch that occurs over time due to use and wear.
- Prevent Chain Derailment: Ensure the chain remains securely on the sprockets.
- Reduce Vibration and Noise: Proper tension minimizes chain slack, reducing impacts and associated noise.
- Prolong Component Life: By keeping the chain properly aligned and tensioned, adjusters contribute to the longevity of the chain, sprockets, and related components.
Function
Chain adjusters work by:
- Adjusting Sprocket Position: Most adjusters function by moving the rear or front sprocket relative to its mounting point.
- Using Tensioning Mechanisms: These mechanisms can include:
- Eccentric Bolts: Rotating these bolts shifts the sprocket position.
- Adjustment Screws: These screws provide fine-grained tension adjustment.
- Sliding Mounts: Allowing the sprocket to slide forward or backward.
- Providing Preload: Some adjusters incorporate features to apply a specific preload to the chain, ensuring proper contact with the sprockets.
Usage Scenarios
Chain adjusters are commonly found in:
- Motorcycles: Crucial for rear chain drive systems.
- Bicycles: Used in single-speed and geared bicycles.
- ATVs and UTVs: Found in vehicles with chain-driven transmissions.
- Industrial Machinery: Used in conveyors, power transmission systems, and other applications utilizing roller chains.
- Chainsaws: Maintain tension on the cutting chain.
Common Types
- Eccentric Adjusters: Utilize rotating bolts to move the sprocket. Common in motorcycles.
- Screw Adjusters: Employ screws for precise tension control, often found in bicycles and some industrial applications.
- Sliding Adjusters: Allow the sprocket to slide within a mount, providing a range of adjustment.
- Hydraulic Adjusters: Used in some high-performance or heavy-duty applications, providing automatic tension control.
- Automatic Adjusters: Self-adjusting mechanisms that maintain chain tension without manual intervention.
- Chain Tensioners (Spring-Loaded): Often used in timing chains within internal combustion engines to maintain constant tension.
Based on the provided information, the following HS codes may be relevant to “chain adjuster”:
- 7315190000: Chain and parts thereof, of iron or steel: Articulated link chain and parts thereof: Parts. This HS code covers parts of articulated link chains made of iron or steel. A chain adjuster, being a component used with chains, could fall under this classification.
- 7315895000: Chain and parts thereof, of iron or steel: Other chain: Other: Other. If the chain adjuster is considered a type of “other chain” not specifically covered by 7315190000, this HS code may be applicable.
- 8308909000: Clasps, frames with clasps, buckles, buckle-clasps, hooks, eyes, eyelets and the like, of base metal, of a kind used for clothing or clothing accessories, footwear, jewelry, wrist watches, books, awnings, leather goods, travel goods or saddlery or for other made up articles; tubular or bifurcated rivets, of base metal; beads and spangles, of base metal: Other, including parts: Other. If the chain adjuster functions as a fastening or connecting component similar to a clasp or buckle, this HS code could be considered.
Regarding HS code 7315190000 and 7315895000, please note the need to verify the material (steel or iron) and may require documentation confirming the composition. Additionally, for both HS codes, a 25.0%加征关税 applies, increasing to 30.0% after 2025.4.2. A further 25%加征关税 may apply to steel and aluminum products.