| HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|
| 8409915085 | Doc | 57.5% | CN | US | 2025-05-12 |
| 8409999190 | Doc | 57.5% | CN | US | 2025-05-12 |
| 8487900080 | Doc | 83.9% | CN | US | 2025-05-12 |
| 8487900040 | Doc | 58.9% | CN | US | 2025-05-12 |
| 8511906040 | Doc | 57.5% | CN | US | 2025-05-12 |
An engine lock, also known as a flywheel lock or engine seizure lock, is a device used to prevent rotation of an engine's flywheel or crankshaft, typically for maintenance or transport purposes.
Material
Engine locks are commonly constructed from hardened steel alloys to withstand significant force and resist deformation. Specific materials used depend on the engine size and intended application. Some locks utilize replaceable steel pins for added security and ease of replacement if damaged.
Purpose
The primary purpose of an engine lock is to immobilize the engine. This is crucial for several reasons:
- Maintenance: Prevents unwanted rotation of the engine during disassembly or reassembly of components like the flywheel, crankshaft pulley, or timing components.
- Transport: Secures the engine during shipping or moving, preventing damage from internal component movement.
- Storage: Helps prevent corrosion and wear during long-term engine storage by keeping internal parts stationary.
- Safety: Prevents accidental starting of the engine during maintenance procedures.
Function
Engine locks function by inserting hardened pins into designated holes in the flywheel or flexplate. These pins engage with corresponding features on the rotating component, effectively preventing its movement. The lock is typically tightened using a wrench or socket, securing it in place. The force required to rotate the engine past the lock's pins will exceed the lock's structural limits, preventing movement.
Usage Scenarios
- Automotive Repair: Frequently used when replacing the flywheel, clutch, or performing timing belt/chain maintenance.
- Motorcycle Repair: Similar applications as automotive repair, particularly when servicing the engine's timing components.
- Small Engine Repair: Used on lawnmowers, generators, and other small engines for flywheel removal and installation.
- Engine Rebuilding: Essential during engine rebuilds to hold the crankshaft in place while working on other components.
- Engine Shipping/Storage: Used by manufacturers and rebuilders to secure engines during transport and long-term storage.
Common Types
- Flywheel Lock (Automotive): Specifically designed for automotive flywheels, often with multiple pins to engage with different bolt patterns. These are often engine-specific.
- Flexplate Lock: Used for engines with flexplates (common in automatic transmissions).
- Universal Engine Lock: Designed to fit a wider range of engines, often with adjustable pins.
- Motorcycle Flywheel Lock: Smaller, engine-specific locks for motorcycle applications.
- Pin-Type Lock: The most common type, utilizing hardened steel pins inserted into flywheel holes.
- Sleeve-Type Lock: A sleeve that fits over the flywheel and engages with the crankshaft, providing a more secure hold. (Less common)
Based on the provided information, “engine lock” can be interpreted as parts related to engines. Here's a breakdown of potentially relevant HS codes:
- 8409915085: Parts suitable for use solely or principally with the engines of heading 8407 or 8408. This code covers parts specifically designed for spark-ignition internal combustion piston engines (including rotary engines) and are to be installed in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704. The total tax rate is 57.5% (基础关税: 2.5%, 加征关税: 25.0%, 2025.4.2后加征关税: 30%).
- 8409999190: This HS code also covers parts suitable for use solely or principally with the engines of heading 8407 or 8408, but with a broader application scope. It applies to parts intended for installation in vehicles of subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704. The total tax rate is 57.5% (基础关税: 2.5%, 加征关税: 25.0%, 2025.4.2后加征关税: 30%).
- 8487900080: Machinery parts, not containing electrical connectors, insulators, coils, contacts or other electrical features, and not specified or included elsewhere in this chapter. This code could apply if the engine lock is a purely mechanical component. The total tax rate is 83.9% (基础关税: 3.9%, 加征关税: 25.0%, 2025.4.2后加征关税: 30%, 钢,铝制品加征关税: 25%).
- 8487900040: Machinery parts, not containing electrical connectors, insulators, coils, contacts or other electrical features, and not specified or included elsewhere in this chapter, specifically oil seals (other than those of chapter 40). If the engine lock incorporates an oil seal, this code may be applicable. The total tax rate is 58.9% (基础关税: 3.9%, 加征关税: 25.0%, 2025.4.2后加征关税: 30%).
Regarding HS codes 8409915085 and 8409999190, it is important to confirm the intended vehicle type for installation (subheading 8701.21, 8701.22, 8701.23, 8701.24 or 8701.29, or heading 8702, 8703 or 8704).
For HS codes 8487900080 and 8487900040, please verify that the engine lock does not contain any electrical components (connectors, insulators, coils, contacts) and confirm the material composition (steel or aluminum) as this impacts the applicable tax rate.