Find HS Code and trade information for one way bearing

One-Way Bearing

A one-way bearing, also known as a sprag clutch or backstop clutch, is a device that allows rotational motion in only one direction while preventing rotation in the opposite direction. It is a type of clutch that automatically engages when driven and disengages when coasting.

Material:

• Steel: Commonly used for the races, sprags (rollers or wedges), and cage. Alloy steels are often employed for higher strength and wear resistance.
• Bearing Steel: High-carbon chromium bearing steel (e.g., 52100) is frequently used for the rollers/wedges due to its hardness and durability.
• Cage Material: Typically made of brass, bronze, or polymer materials to reduce friction and wear.
• Lubricant: Grease is essential for smooth operation and to prevent wear. Specific grease types are chosen based on operating temperature, load, and speed.

Purpose:

• Preventing Backspin: The primary function is to stop reverse rotation of a driven component.
• Overrunning: Allowing free rotation in one direction and locking in the other.
• Starting Aid: In some applications, they assist in starting mechanisms.

Function:

One-way bearings operate based on the principles of friction and wedge action. They consist of:

• Outer Race: The stationary component, typically housed within a bore.
• Inner Race: Attached to the driven shaft.
• Sprags (Rollers/Wedges): These are the key components. They are tapered and reside between the inner and outer races.
• Cage: Holds the sprags in position.

When the driven shaft rotates in the permitted direction, the sprags roll or wedge between the races, transmitting torque. When rotation attempts to occur in the opposite direction, the sprags lock against the races, preventing rotation. The sprags are designed to automatically engage and disengage based on the direction of rotation.

Usage Scenarios:

• Automotive Industry: Starter motors (allowing the pinion gear to freewheel after engine start), alternators, and transmission components.
• Conveyor Systems: Preventing backflow of materials on inclined conveyors.
• Industrial Machinery: Various applications where backstopping or overrunning is required.
• Motorcycles and Scooters: Starter clutches.
• Wind Turbines: Overrunning clutches to protect gearboxes.
• Fishing Reels: Allowing easy casting and secure reeling.
• Power Tools: Drills and other tools requiring unidirectional operation.

Common Types:

• Sprag Type: The most common type. Uses tapered rollers that wedge between races. Offers high torque capacity.
• Roller Type: Uses cylindrical rollers. Generally used for lower torque applications.
• Cam Type: Uses cam-shaped rollers. Suitable for specific applications with intermittent loads.
• Backstop Clutch: A specific type designed for preventing backspin in large machinery. Often incorporates a detent mechanism for initial engagement.
• Overrunning Clutch: A general term, often referring to sprag or roller type clutches used for overrunning applications.

Based on the provided information, the following HS codes may be relevant to “one way bearing”:

• 8483308020: This HS code covers Transmission shafts (including camshafts and crankshafts) and cranks; bearing housings, housed bearings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters; flywheels and pulleys, including pulley blocks; clutches and shaft couplings (including universal joints); parts thereof: Bearing housings; plain shaft bearings: Other Bearing housings: Ball or roller bearing type. This code includes bearing housings and ball or roller bearing types, which could encompass one-way bearings depending on their construction and application as part of a transmission system. The total tax rate is 59.5%.
• 8483908080: This HS code covers Transmission shafts (including camshafts and crankshafts) and cranks; bearing housings, housed bearings and plain shaft bearings; gears and gearing; ball or roller screws; gear boxes and other speed changers, including torque converters; flywheels and pulleys, including pulley blocks; clutches and shaft couplings (including universal joints); parts thereof: Toothed wheels, chain sprockets and other transmission elements presented separately; parts: Other: Other Other. If the one-way bearing is considered a part of a transmission system and presented separately, this code may apply. The total tax rate is 57.8%.

According to the provided reference material, the HS code options related to 'one way bearing' are limited, with only the following 2 found.

It is important to note that the specific classification will depend on the detailed construction and function of the one-way bearing.