acorn industrial services ltd

About Ball Bearings,

All Types of Ball bearings are used to provide smooth, low friction motion in rotary applications. Ball bearings types include Radial Ball Bearings (Deep Groove and Angular Contact) and Thrust Ball Bearings. Radial ball bearings are designed to carry both radial and axial (thrust) loads, while thrust ball bearings are designed for pure thrust loads only. Many different configurations are available for ball bearings, including bearing, machine part designed to reduce friction between moving parts or to support moving loads. There are two main kinds of bearings: the antifriction type, such as the roller bearing and the ball bearing, operating on the principle of rolling friction; and the plain, or sliding, type, such as the journal bearing and the thrust bearing, employing the principle of sliding friction. Roller bearings are either cylindrical or tapered (conical), depending upon the application; they overcome frictional resistance by a rolling contact and are suited to large, heavy assemblies. Ball bearings are usually found in light precision machinery where high speeds are maintained, friction being reduced by the rolling action of the hard steel balls. In both types the balls or rollers are caged in an angular grooved track, called a race, and the bearings are held in place by a frame, commonly called a pillow block or plummer block. Ball bearings or roller bearings reduce friction more than sliding bearings do. Other advantages of antifriction bearings include ability to operate at high speeds and easy lubrication. A journal bearing usually consists of a split cylindrical shell of hard, strong metal held in a rigid support and an inner cylindrical part of soft metal, which holds a rotating shaft, or journal. A self-aligning journal bearing has a spherically shaped support that turns in a socket to adjust to movements of the shaft. Slight misalignment of the shaft can be accommodated in the ordinary journal bearing by wearing of the soft bearing material, often an alloy of tin or lead. Less frequently used are aluminum alloys, steel, cast iron, or a thin layer of silver covered with a thin coating of a soft bearing material. Ideally, a film of lubricant, normally oil, separates journal and bearing so that contact is prevented (see lubrication). Bearings that are not split are called bushings. A thrust bearing supports an axial load on a shaft, i.e., a force directed along a shaft's length. It may be a plate at the end of a shaft or a plate against which the collar on the shaft pushes. Large thrust bearings, such as those used to transmit the motive force of a ship's propeller from the shaft to the hull, have blocks that are separated from the collar on the shaft by wedge-shaped spaces filled with oil. Graphite bearings are used in high-temperature situations. Certain plastics make satisfactory self-lubricating bearings for low speeds and light loads and, if additionally lubricated, work at higher speeds and carry greater loads. Rubber and a naturally oily wood, lignum vitae, are used in water-lubricated bearings. Watches and other precision instruments have glass or sapphire pivot bearings. In gas-lubricated bearings a film of gas separates the bearings from the moving machine parts. Magnetic bearings employ magnetic repulsion to separate journal from bearing, reducing friction still further.

About Angular Contact Bearings

Angular contact bearings are designed such that a contact angle between the races and the balls is formed when the bearing is in use. The major design characteristic of this type of bearing is that one, or both of the ring races have one shoulder relieved, or higher than the other. In order for these bearings to function properly, they must be assembled with a thrust load. This loading (or preload) creates a line of contact (or contact angle) between the inner race, the ball and the outer race. The preload can be built into the bearing or created when the bearing is inserted into an assembly. The contact angle varies from 15° to 40° and is measured relative to a line running perpendicular to the bearing axis. Angular contact bearings are unidirectional thrust bearings that can withstand heavy thrust loads and moderate radial loads.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Radial Ball Bearings
Radial, or deep groove bearings can take radial and axial loads to varying degrees but are used when the primary load is in the radial direction. They consist of an inner ring, an outer ring, balls and sometimes a cage to contain and separate the balls.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Aircraft Control and Airframe Bearings
Aircraft control and airframe bearings are specially designed to meet the rigorous demands of aircraft control and aerospace applications. They can be of ball, roller, or needle roller construction. Most aircraft control and airframe bearings are manufactured to U.S. government military (MIL-SPEC) standards.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Bushings / Sleeve Bearings
Bushings / sleeve bearings, also called journal or plain bearings, are used to constrain, guide or reduce friction in rotary or linear applications. They function via a sliding action as opposed to the rolling action used by ball, roller and needle bearings. As in all bearings, proper lubrication is required to reduce wear and friction. Terms such as fluid film, self-lubricated, hydrostatic, and hydrodynamic are commonly designations for plain bearings.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Ceramic Hybrid Bearings
A ceramic hybrid bearing is constructed of steel inner and outer rings with ceramic (typically Si3N4) balls in place of steel. These bearings have several advantages over all steel bearings, such as higher speed and acceleration capability, increased stiffness, higher accuracy, lower friction and heat generation, reduced lubrication requirements, low thermal expansion, and extended operation life. Bearings containing all ceramic balls are also nonconductive and are commonly used in electric motor applications.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Flange Mounted Bearings
Flange mounted bearings are used when a shaft axis is perpendicular to the bearing mounting surface. Available in 2, 3, or 4-hole configurations, flange mounted bearings provide a method of accurate mounting fits and load support. Selection of the appropriate bearing can be accomplished with knowledge of the shaft size and radial and thrust load requirements.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Hanger Bearings
Hanger bearings are used as rotational bearings for drive and screw conveyor shafts that are enclosed with a housing or conveyor trough. The frame mounts to the top or side of the housing and suspends the bearing to the center for shaft mounting. They are used extensively in agricultural and heavy industry screw conveyors, and in automotive, aircraft and marine driveshaft assemblies.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Insert / Wide Inner Ring Bearings
Insert / wide inner ring bearings are used for mounting on shafts without the need for shoulders, locknuts, or adapters. The bearing is locked in place through setscrews or a locking collar. The inner ring usually extends on both sides of the bearing to provide extra shaft support.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Instrument and Miniature Bearings
Instrument and miniature bearings are small deep groove or angular contact bearings. They are used in applications requiring very small bearings, such as dental drills and computer disk drives.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Linear Bearings and Rails/Guides
Linear bearings are used to provide smooth, low friction motion in linear applications. Different types of linear bearings include bushing/sleeve, ball and cross roller designs.
About Magnetic Bearings
Magnetic bearings use an electromagnet to provide non-contacting, friction-free motion in rotary applications. They are constructed of a rotating and a stationary part (rotor and stator, respectively) separated by an air gap. Magnet bearings operate by applying an electric current to ferromagnetic materials used in both the rotor and stator, creating a magnetic flux path that includes the rotor, stator, and air gap. Magnetic bearings do not require lubrication, and are virtually maintenance-free.

About Needle Roller Bearings

Needle roller bearings are designed for radial load applications where a low profile is desired. The rolling elements of these bearings are cylindrical rollers with large length to diameter ratios (usually 3 to 5 times), called needle rollers. Different types of needle roller bearings include: needle roller bearings with machined inner and outer rings, needle roller and cage assemblies (without an inner or outer ring), and drawn cup needle bearings.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames
About Pillow Block Bearings
Mounted bearings provide a level of load support. Selection of the appropriate bearings can be accomplished based on the shaft size and the radial and thrust load requirements.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.

About Rod End Bearings

Rod end bearings contain a plain bearing that which can accommodate a shaft or rod with varying misalignment. They attach to a static rod via a male threaded stud or an internal female thread. Both the ball and liner come in a variety of materials with different ratings for load capacity and lubrication requirements. Some rod end bearings have integral threaded studs in the bearing. Rod end bearings are widely used in linkages, throttles and shift control rods
About Roller Bearings
Roller bearings are used to replace sliding motion with low friction, rolling motion in rotary applications. The principal types of roller bearings are cylindrical, spherical, and tapered. In general, roller bearings offer higher load capacities than ball bearings of the same size. They are used for heavy-duty moderate-speed applications.
About Slewing Rings / Turntable Bearings
Slewing rings / turntable bearings can accommodate axial, radial and moment loads. They are not mounted in a housing or on a shaft, but instead are mounted directly to a seating surface. The inner and outer rings are supplied with mounting holes. The inner ring, outer ring, or both may have integral gears. They are also referred to as slewing rings and tabletop bearings.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Spherical Plain Bearings
A spherical plain bearing can accommodate a shaft or rod with varying misalignment. It consists of a spherical plain bearing (ball bushing) inside a cylindrical housing. The housing may have a liner of different material to minimize friction or provide self-lubrication. Many ball and liner materials are available in with different ratings for load capacity and lubrication requirements.

About Take-up Bearings and Frames

Take-up frames and bearings are used primarily to correct tension conveyor belts and systems or to align conveyor tracks. They "take up" the necessary design slack with an adjustment screw attached to a bearing through which a rotating element (e.g. the shaft of the conveyor drive) is mounted.
About Thin-section Bearings
Thin-section bearings have small cross-sections with respect to their diameter. Thin-section bearings are designed to save space, lower the weight of a design and reduce friction.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.
About Thrust Bearings
Thrust bearings are designed for pure thrust loads, and can handle little or no radial load. The rolling element in a thrust bearing can be a ball, needle or roller.

Mechanical Components covers a wide range of items and devices designed to handle, induce, or drive mechanical systems. In almost all cases, these components were manufactured to be part of a greater system, and do not have the ability to function on their own. The mechanical components family includes the following products: bearings and bushings, belts and pulleys, chains and sprockets, clutches and brakes, couplings, collars and universal joints, enclosures, fans and electronic cooling, gears, industrial heaters and heating elements, industrial tools, limit switches, mechanical fasteners, power transmission (mechanical), process equipment, pulleys and belts, seals, solenoids, springs, and switches.

Bearings are components used to provide load support and reduce friction. This family includes ball bearings, bushings and sleeve bearings, cam followers, flange mounted bearings, hanger bearings, linear bearings and rails and guides, pillow block mounted bearings, rod end bearings, roller bearings, shaft - hub locking devices, spherical plain bearings, and take-up bearings and frames.

friction, resistance offered to the movement of one body past another body with which it is in contact. In certain situations friction is desired. Without friction the wheels of a locomotive could not “grip” the rails nor could power be transmitted by belts. On the other hand, in the moving parts of machines a minimum of friction is desired; an excess of friction produces heat, which in turn causes expansion, the locking of the moving parts, and a consequent breakdown of the machinery. Lubrication is important in minimizing friction as are also such devices as ball and roller bearings.