Angular Contact Ball Bearings: Angular contact ball bearings have inner and outer ring raceways displaced along the bearing axis, allowing them to carry combined radial and axial loads simultaneously. Their axial load capacity increases with the contact angle, which is the angle that defines how load is transmitted between the ball and raceways. Common types include single row angular contact ball bearings, double row angular contact ball bearings, four-point contact ball bearings, and matched pair bearings, used for higher stiffness and load distribution. They are widely used in machine tools, pumps, compressors, electric motors, automotive gearboxes, and industrial machinery due to their high speed, precision, and durability.
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Self-Aligning Ball Bearings :
Self-aligning ball bearings have two rows of balls, a common sphered outer ring raceway, and two deep uninterrupted raceway grooves in the inner ring. They are available in open or sealed designs and are designed to accommodate angular misalignment between the shaft and housing, which may occur due to shaft deflection or mounting errors. These bearings offer high-speed performance with low friction, resulting in cooler operation and reduced energy loss. They require minimal maintenance due to low heat generation, which helps extend service life and maintenance intervals. Self-aligning ball bearings also provide excellent performance under light loads, have low noise and vibration levels, and are widely used in applications like fans and industrial machinery where smooth and quiet operation is important.
Insert Bearings:
Insert bearings (Y-bearings) are based on sealed deep groove ball bearings, featuring a convex outer ring and an extended inner ring with a locking device, allowing quick and easy mounting onto the shaft. These bearings are designed for simple installation and reliable performance in various applications. The spherically shaped outer surface helps accommodate initial misalignment by tilting within the housing, improving operational flexibility. They offer a long service life, even in contaminated environments, due to effective sealing solutions. Insert bearings also provide reduced noise and vibration levels, making them suitable for applications where smooth and quiet operation is important, with different shaft locking methods available to meet specific performance requirements.
Single Row Deep Groove Ball Bearings:
Single row deep groove ball bearings are available in open or capped designs (with seals or shields). Open bearings, which can also be supplied in capped versions, may include recesses in the ring side faces. They are widely used due to their simple design, versatility, and ability to support both radial and limited axial loads, making them suitable for a broad range of industrial applications.
Double Direction Thrust Ball Bearings :
These bearings consist of a shaft washer, a housing washer, and a ball and cage assembly. They are designed to accommodate axial loads and locate a shaft axially in one direction only, making them suitable for applications where controlled axial positioning and reliable thrust load support are required.
Single Row Angular Contact Ball Bearings :
Single row angular contact ball bearings can accommodate axial loads in one direction only. They are typically used in pairs or adjusted against a second bearing to support loads in both directions. These bearings have upper and lower shoulders on the rings and are non-separable, providing high rigidity and reliable performance in precision applications.
Four-Point Contact Ball Bearings :
Four-point contact ball bearings are single row angular contact ball bearings designed to support axial loads in both directions. They can also carry a limited radial load along with axial load. These bearings are separable, meaning the outer ring with ball and cage assembly can be mounted separately from the two inner ring halves, making installation easier. They require less axial space than double row bearings, making them suitable for compact designs. The recessed shoulders on the inner ring halves improve oil flow and also help in easier dismounting. These bearings maintain limited deformation under high clamping forces, ensuring stable performance in demanding applications.
Capped Bearings:
Angular contact ball bearings are available in capped versions with shields or seals on both sides for improved protection and longer service life. Single row bearings are supplied with non-contact seals (2RZ), offering low friction and effective contamination protection. Double row angular contact ball bearings are available with shields (2Z) for basic protection and low friction, or contact seals (2RS1) for enhanced sealing against dust and moisture. These designs ensure reliable performance, reduced maintenance, and suitability for a wide range of industrial applications.
Double Row Angular Contact Ball Bearings:
Double row angular contact ball bearings are designed like two single row angular contact ball bearings arranged back-to-back, but they require less axial space. They can accommodate radial loads, axial loads in both directions, and tilting moments, making them suitable for demanding applications. These bearings provide a stiff and stable bearing arrangement, ensuring high performance, precision, and reliability in industrial machinery.
Adapter Sleeves:
Adapter sleeves are commonly used components for mounting bearings with a tapered bore onto a cylindrical shaft seat. They can be used on both plain shafts and stepped shafts, making them a versatile mounting solution. They are easy to install and do not require additional shaft location devices. On plain shafts, the bearing can be positioned at any point along the shaft. On stepped shafts, when used with an L-shaped spacer ring, they allow precise axial positioning, making bearing mounting and dismounting easier and more efficient.
Lock Nuts Requiring a Keyway:
Lock nuts are used for securing bearings and components on shafts. They have metric threads and are designed to be used with lock washers. They feature four equally spaced slots around the circumference for a hook or impact spanner and are also known as shaft or withdrawal nuts. They are available in sizes from M10×0.75 to M200×3 (sizes 0 to 40) and can be locked using MB or stronger MB A lock washers. Some versions also use metric trapezoidal threads and are referred to as removal nuts, available in sizes from Tr 210×4 to Tr 280×4 (sizes 42 to 56), suitable for heavy-duty applications requiring secure locking.
Withdrawal Sleeves:
Withdrawal sleeves are slit tapered sleeves used to mount bearings with a tapered bore onto a cylindrical seat on stepped shafts. They are pressed into the bore of the bearing inner ring, which is supported against a shaft shoulder or similar fixed component, and are secured on the shaft using a nut or end plate. These sleeves are designed for easy mounting and reliable location of bearings in various applications.
Withdrawal sleeves are available in a standard range that includes basic design sleeves, sleeves for oil injection mounting, and sleeves suitable for large shaft diameters up to 1000 mm, making them suitable for a wide range of industrial requirements.
Lock Nuts:
Lock nuts are used to locate bearings onto a shaft and can also be used to mount bearings with a tapered bore onto tapered shaft seats or adapter sleeves, as well as to dismount bearings from withdrawal sleeves. They are also commonly used to secure components such as gears, belt pulleys, and other machine parts.
To prevent unintentional loosening, lock nuts are secured using either a locking device that engages a keyway in the shaft or a key slot in the adapter sleeve, or a locking mechanism integrated directly into the nut, ensuring safe and reliable operation.
Lock Nuts with Integral Locking:
Lock nuts with integral locking help reduce shaft cost since no keyway is required, and installation is quicker and easier because no separate locking device is needed.
These lock nuts are designed for specific applications: lock nuts are used to axially locate CARB roller bearings, sealed spherical roller bearings, and sealed self-aligning ball bearings on a shaft. They feature appropriate contact faces for the intended bearings and are available in sizes from M20×1 to M200×3 (sizes 4 to 40).
lock nuts are intended for locating radial bearings in less demanding applications and are available in sizes from M10×0.75 to M100×2 (sizes 0 to 20).
Double Row Deep Groove Ball Bearings:
Double row deep groove ball bearings are suitable for applications where the load-carrying capacity of a single row bearing is insufficient. For the same bore and outside diameter, they are slightly wider than single row bearings, but offer a significantly higher load-carrying capacity. These bearings provide reliable performance in radial load applications with limited axial load support, making them ideal for demanding industrial uses.
Thrust Ball Bearings:
Thrust ball bearings are manufactured as single direction or double direction bearings and are designed to accommodate axial loads only, with no capability to carry radial loads. They are commonly used in applications requiring controlled axial positioning and thrust load support. These bearings are separable and interchangeable, which simplifies mounting, dismounting, and maintenance. Versions with sphered housing washers can accommodate initial misalignment, improving operational flexibility. The shaft washer has a ground bore for interference fit, while the housing washer bore is larger and turned, ensuring proper assembly and reliable performance in axial load applications.
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