Product Description
UMZ Bearing ,The rolling element of bearing is taper roller, cone roller bearing inner circle has tapered roller.Conical extension all the to the same point on the axis bearing, tapered roller bearings belong to the body bearing, our company can according to customer’s special requirements, and design production, can provide a metric system size and non-standard bearings.
Tapered roller bearing can be a direction under high load, radial and axial practical in low and middle speed aspect, we are CZPT to offer the following range of bearings: single row, double row, four column type, precision for PO and level P6.
| Name: | 28985/28921 28985/21 28985/28920 571117177 Inch Taper Tapered Roller Bearing |
| Model No. | 28985/28921 28985/21 28985/28920 571117177 |
| Type: | Tapered Roller Bearing/Taper Roller Bearing |
| Weight: | Standard weight |
| Specifications: | Standard size |
| Material: | Chrome steel GCR-15 |
| CAGE: | Steel Cage and Nylon Cage |
| Rolling body: | Roller |
UMZ INCH TAPERED ROLLER BEARING
The structure, assembly dimension accuracy and rotation accuracy of Inch tapere roller bearings are different from those of metric bearings.It is mainly used for import-ed machinery or industries with special needs.
The Inch tapered roller bearing refers to the tapered roller bearing whose overall dimensions are measured in inches, originated from Britain and the United States;
Structure: single column, double column and 4 columns
UMZ Bearing-ZheJiang HangZhou Precision Bearing Co., Ltd. has the most advanced production equipment and perfect testing instruments. Tapered Roller Bearing, Auto wheel Bearing, Deep Groove Ball Bearing,Pillow Block Bearing,Cylindrical Roller Bearing are our main product which is strictly followed with the ISO9001 Quality Management System Standard and IATF16949 Quality Standard. The company has registered trademark “UMZ”. The products have been sold to all over the world and have replaced some of the imported products. What’s more, The products have been exported to more than 20 countries and the areas, such as the USA,Italy,Mexico,Russia,Brazil,Spain and Middle-east,etc., which is Deeply Prided by new and old customers.
Assembly Workshop
Test Workhouse
The company has complete detection means, measure and improve the means of detection means,online detection and performance of finished bearings. Have life test machine, grease leakage temperature rise test, cleanliness measuring device, roundness instrument, curvature tester, roughness tester, liquid gap tester, vibration instrument and various bearing special inspection instrument the key of high precision instruments such as CZPT instrument, roundness instrument etc. are from Britain, Japan and other countries to introduce merit, not only the formation of the strict product quality inspection system, and fully capable of independent research and Analysis on the bearing performance indexes.
Q:What’s your after-sales service and warranty?
A: We promise to bear the following responsibilities when defective products were found:
1.12 months warranty from the first day of receiving goods;
2. Replacements would be sent with goods of your next order;
3. Refund for defective products if customers require.
Q:Do you accept ODM&OEM orders?
A: Yes, we provide ODM&OEM services to worldwide customers, we also customize OEM box and packing as your requirements.
Q:What’s the MOQ?
A: MOQ is 10pcs for standardized products; for customized products, MOQ should be negotiated in advance. There is no MOQ for sample orders.
Q:How long is the lead time?
A: The lead time for sample orders is 3-5 days, for bulk orders is 5-15 days.
Q:Do you offer free samples?
A: Yes we offer free samples to distributors and wholesalers, however customers should bear freight. We DO NOT offer free samples to end users.
Q:How to place order?
A: 1. Email us the model, brand and quantity,shipping way of bearings and we will quote our best price for you;
2. Proforma Invoice made and sent to you as the price agreed by both parts;
3. Deposit Payment after confirming the PI and we arrange production;
4. Balance paid before shipment or after copy of Bill of Loading.
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| Precision: | P0 P6 P5 ABEC1 ABEC3 ABEC5 |
|---|---|
| Cage: | Steel Cage and Nylon Cage |
| Inner and Outer Cage: | Super Finished |
| Brand: | Umz, OEM |
| Factory or Trader: | Factory |
| Hardness: | 59-62 |
| Samples: |
US$ 0.1/Piece
1 Piece(Min.Order) | |
|---|
| Customization: |
Available
| Customized Request |
|---|
What are Tapered Roller Bearings and How do They Function in Machinery?
Tapered roller bearings are a type of rolling element bearing designed to handle both radial and axial loads by providing a conical geometry. They consist of inner and outer rings, tapered rollers, and a cage that holds the rollers in place. Tapered roller bearings are commonly used in various machinery and equipment for their ability to support high radial and axial loads simultaneously. Here’s how they function in machinery:
- Geometry:
Tapered roller bearings have an inner ring with a conical surface and an outer ring with a matching conical surface. The rollers are also shaped like truncated cones. This geometry allows the rollers to make contact with both the inner and outer raceways at a common point on the bearing axis, distributing loads more effectively.
- Load Distribution:
The conical shape of tapered rollers enables them to handle both radial and axial loads. Radial loads are supported by the larger diameter of the rollers near the large end of the cone, while axial loads are absorbed by the smaller diameter near the small end of the cone.
- Adjustable Clearance:
Tapered roller bearings often allow for adjustable clearance or preload. This feature permits fine-tuning of the bearing’s internal play to optimize performance, reduce friction, and prevent excessive wear.
- Thrust Capability:
Tapered roller bearings can handle thrust (axial) loads in one direction, making them suitable for applications where axial loads need to be managed along with radial loads.
- Applications:
Tapered roller bearings are commonly used in various machinery and equipment:
- Automotive Industry:
Tapered roller bearings are widely used in wheel hubs, transmissions, and differential systems in automobiles, where they handle radial and axial loads experienced during driving.
- Heavy Machinery:
In construction equipment, mining machinery, and industrial machinery, tapered roller bearings support heavy loads and shocks, making them suitable for applications like earthmoving and material handling.
- Aerospace:
Tapered roller bearings are used in aircraft landing gear, where they support both vertical and horizontal loads during takeoff, landing, and taxiing.
- Railways:
In trains, tapered roller bearings are used in wheelsets and axles to manage radial and axial loads that occur as the train moves along curves and straight tracks.
- Wind Energy:
Tapered roller bearings are employed in wind turbine gearboxes, where they handle the radial and axial loads associated with converting wind energy into electrical power.
- Installation:
Installation of tapered roller bearings often involves adjusting the internal clearance or preload to optimize performance. Proper lubrication is crucial to ensure smooth operation and longevity.
In summary, tapered roller bearings function by utilizing their conical geometry to support both radial and axial loads, making them versatile components in a wide range of machinery and equipment across various industries.
Can you Explain the Design and Construction of Tapered Roller Bearings?
The design and construction of tapered roller bearings are characterized by their conical geometry and specific components that enable them to handle radial and axial loads simultaneously. Here’s an overview of their design and construction:
- Components:
Tapered roller bearings consist of the following components:
- Inner Ring:
The inner ring has a conical raceway on its inner surface, which matches the conical shape of the rollers. It serves as the raceway for the rollers and provides support to the rotating assembly.
- Outer Ring:
The outer ring also features a conical raceway on its inner surface that complements the shape of the rollers. The outer ring provides a rigid structure to house the entire bearing assembly.
- Tapered Rollers:
The rollers have a conical shape with varying diameters along their length. This design allows the rollers to make point contact with the inner and outer raceways, distributing loads efficiently.
- Cage:
The cage or retainer holds the rollers in position, maintaining proper spacing and preventing them from coming into contact with each other. The cage material can vary, and its design may affect factors like friction and heat generation.
- Conical Geometry:
The distinguishing feature of tapered roller bearings is their conical geometry. The conical angle is defined by the contact angle between the roller axis and the bearing axis. This angle facilitates effective load distribution and axial load support.
- Load Distribution:
The conical shape of the rollers and raceways allows tapered roller bearings to handle both radial and axial loads. Radial loads are primarily supported by the larger diameter of the rollers at the large end of the cone, while axial loads are absorbed by the smaller diameter near the small end of the cone.
- Adjustable Clearance and Preload:
Many tapered roller bearings allow for adjustable internal clearance or preload. This feature enables fine-tuning of the bearing’s internal play, optimizing performance and minimizing friction.
- Thrust Capability:
Tapered roller bearings can handle thrust (axial) loads in one direction, making them suitable for applications where axial loads need to be managed along with radial loads.
- Applications:
Tapered roller bearings find applications in various industries, including automotive, heavy machinery, aerospace, and more. They are used in scenarios that require efficient load distribution and handling of combined loads.
In summary, tapered roller bearings are designed with conical geometry to accommodate both radial and axial loads. Their specific components, such as tapered rollers and a cage, work together to ensure effective load distribution, making them suitable for a wide range of industrial applications.
What Factors should be Considered when Selecting a Tapered Roller Bearing for a Specific Application?
Choosing the right tapered roller bearing for a specific application involves considering various factors to ensure optimal performance and reliability. Here are the key factors to consider:
- Load Requirements:
Assess the types and magnitudes of both radial and axial loads the bearing will experience. Choose a tapered roller bearing with a load capacity that comfortably exceeds the expected loads to prevent premature wear or failure.
- Speed:
Determine the required rotational speed of the bearing. High-speed applications may require bearings designed for reduced friction and heat generation to maintain efficiency and avoid overheating.
- Precision and Tolerance:
Consider the level of precision required for the application. Tapered roller bearings are available in different precision classes, such as ABEC (Annular Bearing Engineering Committee) grades, which impact factors like smoothness and accuracy of rotation.
- Mounting and Installation:
Assess the available space for mounting the bearing and consider the ease of installation. Bearings with adjustable clearance or preload might be advantageous for fine-tuning the bearing’s internal play.
- Temperature and Environment:
Take into account the operating temperature range and environmental conditions of the application. Extreme temperatures or corrosive environments may require specific bearing materials or coatings.
- Lubrication:
Choose an appropriate lubricant based on the application’s speed, temperature, and load conditions. Proper lubrication ensures smooth operation, reduces friction, and prolongs the bearing’s lifespan.
- Cost and Budget:
Consider the budget allocated for bearings. High-precision or specialized bearings may come at a higher cost, but their performance benefits can outweigh the initial investment over the bearing’s service life.
- Application Type:
Identify the specific industry and application in which the bearing will be used. Tapered roller bearings are employed in various sectors, including automotive, heavy machinery, aerospace, and more.
- Expected Lifespan:
Estimate the required bearing lifespan for the application. Factors such as load, speed, and maintenance practices can impact the bearing’s longevity.
- Bearing Size and Design:
Choose a bearing size that fits within the application’s space constraints while providing the necessary load capacity. The design, including the number and arrangement of rollers, can influence load distribution and performance.
- Maintenance Requirements:
Consider the maintenance schedule and accessibility for bearing inspection and replacement. Bearings in applications with limited maintenance intervals may require enhanced durability.
In conclusion, selecting a tapered roller bearing for a specific application involves assessing load requirements, speed, precision, mounting, temperature, lubrication, cost, application type, expected lifespan, bearing size, and maintenance considerations. Careful evaluation of these factors ensures that the chosen bearing meets the demands of the application while providing reliable performance and longevity.
editor by CX 2024-04-23