Taper Lock Bushing

A Taper Lock Bushing is a mechanical joint used to connect a shaft to another part. Taper lock bushings are made of steel and feature a tapered surface to lock onto the shaft. The taper bore bushings also feature a thread and key-way for additional security. Taper lock bushings are available in different sizes and can be interchanged with a variety of other bushings from other manufacturers.

Bushing Keyway Size PDF

Types of Taper Lock Bushings

What Is a Taper Lock Bushing?

A taper lock bushing is an excellent choice for applications requiring a tight fit and an excellent clamping force. They offer a slim and sturdily constructed flangeless design. This allows the bushing to fit flush with the tapered bushing sprocket. The hub is designed to be left-justified to prevent any issues with high overhung loads.

These taper-lock bushings are great for mounting pulleys on shafts. They are also handy for attaching shafts to driven shafts. Typical applications include power transmission components such as motors, gearboxes, and transmissions. The taper lock bushings are available in many bore sizes, from mm to inches.

Taper Lock Bush Dimensions and Specifications

taper lock bushing size chart

How Does a Taper Lock Bushing Work?

A taper-lock bushing is a mechanical device used to mount components such as pulleys, sprockets, and gears onto shafts. It provides a secure and reliable connection between the shaft and the mounted component. The primary function of a taper lock bush is to create a tight fit between the bushing, the shaft, and the mounted component.

Here’s how taper lock bushings work:

• Design: A taper lock bushing typically consists of two main parts: a hollow, tapered sleeve and an outer flange with threaded holes. The sleeve has a slightly larger diameter at one end than the other, forming a taper.
• Shaft Preparation: The shaft onto which the bushing will be mounted needs to be clean and free of debris. It should also be properly sized and have the appropriate keyway, if necessary.
• Bushing Installation: The bushing is placed over the shaft, with the large end facing the component to be mounted. The small end of the bushing is inserted onto the shaft.
• Taper Engagement: As the bushing is pushed onto the shaft, the taper on the inside of the bushing matches the taper on the outside of the shaft. This creates a wedging effect, causing the bushing to tighten around the shaft.
• Flange Attachment: Once the bushing is in position, the outer flange is bolted to the component being mounted. The flange has threaded holes that align with corresponding holes in the component, allowing bolts to secure them together.
• Torque Application: To further enhance the connection, torque is applied to the bolts, causing the flange to press against the component. This tightens the bushing onto the shaft, creating a strong and secure connection.

The taper lock design ensures that the bushing remains tightly locked in place, preventing any slippage or movement between the shaft and the mounted component. It provides a reliable and easily adjustable connection, allowing for quick installation, removal, and repositioning of the mounted components when needed.

How to Measure Taper Lock Bush?

To measure a taper lock bush, you will need a few tools. Here’s a step-by-step guide on how to measure a taper lock bush.

1. Prepare the tools: You will need a vernier caliper or a micrometer capable of measuring both internal and external dimensions.
2. Examine the taper lock bush: Look closely at the taper lock bush. It consists of an inner tapered bore and an outer flange. Familiarize yourself with the parts before proceeding.
3. Measure the outer diameter: Use the vernier caliper or micrometer to measure the outside diameter of the taper lock bush. Place the measuring jaws or anvils on opposite sides of the bush’s outer flange and close them gently until they make firm contact. Take note of the measurement.
4. Measure the inner diameter: Open the jaws or anvils of the vernier caliper or micrometer and place them inside the inner tapered bore of the bush. Close them gently until they make contact with the inner surface of the taper. Take note of the measurement.
5. Determine the taper angle: The taper angle is the angle of the taper, usually expressed in degrees. It is not directly measured but provided by the manufacturer. Check the product documentation or contact the manufacturer to obtain the taper angle information.
6. Verify compatibility: Once you have measured the outer and inner diameters and obtained the taper angle, compare these measurements to the specifications of the component you are trying to fit the taper lock bush onto. Ensure that the taper lock bush is compatible with the intended component, taking into account factors such as shaft size and taper angle.

By following these steps, you should be able to measure a taper lock bush accurately. Remember to handle the measuring tools carefully to ensure precise measurements, and consult the manufacturer or relevant documentation if you have any doubts about compatibility.

Installation of Tapered Bushings

1. Remove all oil, dirt and paint from the shaft, bushing bore, bushing exterior and component (sprocket, pulley, etc.) bores.
2. Insert the bushing into the assembly. Match the hole pattern, not the threaded holes (each hole is threaded on one side only.)
3. Screw set screws or cap screws into those semi-threaded holes. Install the assembly on the shaft.
4. Alternately tighten the set screws or cap screws to the recommended torque settings.
5. On 3535 and larger bushings, hammer the large end of the bushing with a block, socket, or punch (do not hammer the bushing directly).
6. Repeat steps 4 and 5 until the torque wrench reads the same after hammering as it did before hammering.
7. Fill all unoccupied holes with grease.

Tapered Bushing Removal

1. Remove all set screws or cap screws.
2. Insert the set screws or cap screws into the hole. Loosen the bushing by alternately tightening the set screws or cap screws.
3. To reassemble, complete all seven (7) installation instructions.

Choose WLY Transmission as the Supplier

Depending on the type of bushing you are looking for, you will need to determine the length through the bore of the shaft you want to use the bushing in. Generally, taper lock bushings come in metric and inch series.

If you are not sure which bushing is right for your application, it is important to work with a qualified supplier. These manufacturers offer a wide range of products and services. From precision machining to heat treating, a supplier can assist you with your design and installation needs.

WLY Transmission Co., Ltd is one of the taper lock bushings suppliers in China. With more than 15 years of experience, we offer high-quality China taper lock bushes and export them to many places worldwide. Our inch series and metric taper lock bushings can be the replacement of browning taper lock bushings, baldor dodge taper lock bushings, fenner taper lock bushings, martin, masks and SKF taper lock bushings. Feel free to contact us for more information; we’d love to help.