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SLF Products:
Spindle bearings (high precision angular contact ball bearings)
Angular contact ball bearings, single row
Deep groove ball bearings, single row
Self-aligning ball bearings
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Offered with an almost unlimited selection of "custom design" features and options, as well as specially-engineered bearing types. Choose from optional construction materials, a wide range of mechanical modification and engineering adaptations, all carefully selected to allow you to satisfy your particular application requirements:
A variety of shaft locking devices
A broad selection of bearing seals
Special internal and external fit-ups
Special and premium lubricants
Special housing configurations
Corrosion-resistant platings /coatings
Many other options/modifications
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SNR TOPLINE bearings benefit from SNR's state-of-the-art innovations, providing suitable solutions for the most extreme operating requirements.
This product range breaks down into 4 families, with bearings capable of sustaining temperatures from -60 °C (LT series) to +150 °C (FT series) and up to +200 °C (HT series), as well as high rotational speeds up to 700,000 N.Dm (HV series).
Fitted with steel cages, the Topline bearings are also proposed in sealed version (fluorinated elastomer or Viton seal, according to the series) or in protected version (deflector baffles, of lower cost, and suitable for higher rotational speeds).
The TOPLINE product range greases have been selected for their outstanding performance in application and submitted to thorough testing. 70 % of the bearing failures are attributable to lubrication: therefore, particular care has been paid to grease selection, now a major contributor to the quality of our bearings, guarantying their reliability and durability.
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CEROBEAR ceramic bearings make it possible to apply rolling bearings in a variety of circumstances. Cerobear ceramic bearings offer new opportunities of application, especially in extreme technical domains, which have been inaccessible up till now.
The inner and outer rings of the bearings are made of high-performance ceramics such as silicon nitride or zirconium oxide. The rolling elements are also made of silicon nitride. For the production of cages and gaskets a variety of materials, such as PEEK or PI, are available.
CEROBEAR ceramic bearings set themselves apart through the following characteristics:
■ High corrosion resistance
■ Qualify for extreme temperatures
■ Qualify for dry running conditions
■ Low weight
■ Absolutely amagnetic
■ Qualify for media- and starved lubrication
■ High stiffness
■ High reliability
■ Low abrasion
■ Low operating costs
CEROBEAR ceramic bearings are manufactured in ISO- measurements or customized designs according to your needs.
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These bearings are for ultra-high temperature, low magnetization, and high surface pressure requirements, which cannot be handled even with bearings for general vacuum, clean environments or corrosive environments.
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features:
Acetal races as standard
Polypropylene,PEEK, nylon and other materials for bearing races also available
Stainless steel 316 balls as standard
Glass, plastic and other stainless steel ball types available
advantages:
Corrosion resistant
Lubrication free
Lightweight
Low friction
Quiet
Hygienic
Maintenance free
Non-metallic with glass balls
Non-magnetic with glass balls
In excess of 25 years proven performance
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CRES stands for Corrosion Resistant Engineered Solutions... a new look at corrosion resistant power transmission components.CRES Mounted Ball Bearing products start with the latest in corrosion resistance technology coupled with advanced industry minded features driven by industry-focused leaders. Finally, our engineers designed CRES around the notion that a "family" of corrosion resistant products spanning the spectrum of performance and value will provide customers flexibility and latitude to specify the correct solution when and where they see fit... without jeopardizing product performance or operating profit.
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Special bearings for your special requirements
If your application requires special sizes, load or speed ratings, we can provide you with rapid, practical and creative custom-made solutions.
Our experienced engineering team has developed special bearings and systems for numerous industries, such as:
* Pumps
* Agricultural machinery
* Wind energy
* Heavy machinery
* Iron and steel
* Railway vehicles
* General machinery
* Industria gearboxes
* etc.
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Available open, protected by shields or seals, with light or heavy contact.
Where special requirements of environment conditions, high speeds, noise level, the bearings will be made with related variations of the internal design and of the component parts.
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GWG make large diameter deep groove ball bearing. In addition to stardard bearings, GWG supply non-standard and customer bearings in shorter lead time than expected.For more information,please view our homepage www.gwgbearings.com
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Deep Groove ball bearings are the most popular of all the ball bearing types because they are available in a wide variety of seal, shield and snap-ring arrangements.
The bearing ring grooves are circular arcs made slightly larger than the radius of the ball. The balls make point contact with the raceways (elliptical contact when loaded). The inner ring shoulders are of equal height (as the outer ring shoulders).
Deep Groove ball bearings can sustain radial, axial, or composite loads and because of simple design, this bearing type can be produced to provide both high-running accuracy and high-speed operation.
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Deep groove ball bearings are the simplest yet the most popular bearing:
* Suitable for very high rotating speeds
* Well suited for medium high radial and axial loads in one or both directions
* Various seals and grease variants available for different operating conditions
* Numerous clearance and tolerance classes available for different operating conditions
* Standard: DIN 625
* Series: 600, 6000, 6200, 6300, 6400, 1600; Thin-ring: 61800, 61900
* Application examples: electrical motors, general machinery, industrial gearboxes, pumps, agricultural machinery, etc.
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Deep Groove ball bearings are the most popular of all the ball bearing types because they are available in a wide variety of seal, shield and snap-ring arrangements.The bearing ring grooves are circular arcs made slightly larger than the radius of the ball.
The balls make point contact with the raceways
(elliptical contact when loaded).
The inner ring shoulders are of equal height (as the outer ring shoulders). Deep Groove ball bearings can sustain radial, axial, or composite loads and because of simple design, this bearing type can be produced to provide both high-running accuracy and high-speed operation. Standard ball retainers (cages) are made from pressed steel. Machined cages are used in bearing operation at very high speed or for large diameter bearings.
Deep Groove ball bearings with seals or shields are standardized. They contain proper amount of grease in advance.
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Angular contact ball bearings with single row, double row, matched sets.
To stand axial and radial loads the range will include different contact angles (12 to 60 degrees), high accuracy for machine tool spindle applications, large size for heavy industries and wheel special bearings also.
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The construction of this ball bearing is similar to mounting two single row angular ball bearings back to back(DB).
Capacities of double row ball bearing is less than single row since few balls can be inserted per row.
This bearing type can sustain radial, moment and bi-directional axial loads.
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- sizes per Type Series 70, 72,73,
- low-friction, low noise, rolling contact ball guide,
- self-adjusting preload, increased number of balls,
- running during extended lifetime with high precision.
- 16º contact angle, face-to-face orientation,
- standardised per DIN 628 part 5
- Precision ABEC 5...7...9...HQ
two rows within the space of a single row bearing:
- Type K (factory standard)
- Type UK (dimensional series 20)
- Type UL, UM (Type series 72, 73)
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Cylindrical roller bearings with snap ring grooves
. Basic Design: Full complement. Double row. Sealed on both sides
. Highest dynamic & static load ratings:
- Maximum utilization of bearing section provides maximum load ratings.
. Superior sealing capability:
- Unique design rubber contact seal prevents dust & water invasion.
. Location: Easy to locate axially due to snap rings on both sides.
. Lubrication: - Lubricate with a lithium soap-based grease containing an EP additive.
. Relubrication: - Lubricate through lubrication hole & grooves only in inner ring.
. Operating temperature: Suitable for -30 to +120°C
. Application: Highly suitable in rope sheave
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Four-point contact ball bearings
GWG produce large diameter Four-point contact ball bearings. In addition to standard items,GWG can make non-standard and custom beairngs with shorter lead time than expected.For more information,please view our homepage www.gwgbearings.com
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at the moment selected types or series Q.. and QJ.., e.g. Q306, QJ306, QJ308, QJ206, QJ207, QJ208, QJ209, QJ210, QJ212, QJ218, Q313, Q317
additional types are possible on request
cage design: Glass-fibre reinforced polyamide 66 or brass
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features:
Acetal races as standard
Polypropylene,PEEK, nylon and other materials for bearing races also available
Stainless steel 316 balls as standard
Glass, plastic and other stainless steel ball types available
advantages:
Corrosion resistant
Lubrication free
Lightweight
Low friction
Quiet
Hygienic
Maintenance free
Non-metallic with glass balls
Non-magnetic with glass balls
In excess of 25 years proven performance
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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.
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Flush ground set combination
(Universal matching)
Flush ground set combination bearings are also available with suffix U. This permits the use of random combinations where two or more bearings are mounted.
This type is used for for supporting the ball screws that are used as actuators of high precision and high machines, precision measurement equipment, robots, etc. This is a precision and high ability bearing.
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Timken produces precision bearings and assemblies in miniature, instrument and thin-section series. All are manufactured with quality steel, tolerances and features that meet demanding application challenges. These precision bearings and assemblies are applied in surgical and medical imaging devices, precision pumps, measurement and material handling equipment as well as guidance, weapons and space applications.
Super precision ball bearings are available in inch sizes.
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SNFA Series VEB (ISO 19) and VEX (ISO 10) have been developed to offer outstanding performance even in very demanding and advanced applications.
The different issues affecting high speed applications have been analysed when designing and producing these series. Particular attention has been paid to dynamic and heat effects and lubrication problems without neglecting other features such as the load capacity and rigidity. VEB and VEX bearings offer a wide range of application possibilities both with grease and oil lubrication.
The values given for rigidly preloaded bearings are valid as long as operating conditions do not involve marked heat-induced preload increase. In some applications, such as electrospindles for instance, the electric motor generated heat thermally increases bearing preload and reduces the
speed obtainable. H1/NS version VEB and VEX bearings (with ceramic balls and air-oil lubrication feed holes in the outer ring) are the ideal solution for reaching maximum speed.
Minimum air-oil lubrication, controlled constant preload, accurate bearing mounting and good spindle balance are necessary for obtaining satisfactory results with VEB and VEX bearings.
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Koyo's line of EXSEV (Extreme Special Environment) bearings were specifically engineered for the tough applications..like those involving high temperatures, corrosive solutions and atmospheres, dry lubrication, low particle emissions, non-magnetic environments and high vacuum conditions.
Koyo meets the challenge with specialty steels, silicon nitride bearing components and advanced dry film coatings for protection and low particle emissions.
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High temperature bearings
Fitted with a steel sheet cage, the F600 range bearings receive a specific surface treatment making them more resistant to oxidation and thermal shocks, and allowing operations between 200°C and 350°C.
Suitable for slow handling at high temperatures, they require a rotating speed of less than 50 RPM and moderate loads. Radial clearance was increased to compensate for thermal expansion deviations between the 2 rings and for neighbouring component distortions.
The special treatments of the F600 series can be applied on request to other bearing symbols and types (e.g. spherical roller bearings). Please contact SNR's technical departments.
Applications examples: oven carriages, transport rolls, conveyors, porcelain works, glass making, foundries, cement plants, brick plants…
Series: F600 (standard), F604 (greased and protected), F605 (limestone process)
6000, 6200, 6300
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Development of low-torque ball bearing that improves automotive fuel efficiency.
JTEKT Corporation has developed a low-torque ball bearing for use in oil lubrication that improves automotive fuel efficiency.
Many oil-lubrication ball bearings are used in the motor-support areas of hybrid vehicle transmissions and the gear-support areas of automotive automatic transmissions, manual transmissions, and continuously variable transmissions.
Further improvement in automotive fuel efficiency is currently sought, and further reduction of rotational resistance (rotational torque) in the ball bearings used in the above mechanisms is seen as essential. By optimizing the design dimensions of the bearing internal parts, JTEKT has succeeded in reducing rotational torque 40% in comparison with the conventional product.
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SNFA's prime objective has always been to reach the highest levels of specialisation in the design, development and manufacture of precision bearings.
The various series manufactured by SNFA present a wide variety of configuration and sizes. They consist of bearings ranging from a minimum of 6 mm diameter bore to a maximum of 380 mm outer diameter.
Development has always been in line with international standards, as there is a need to offer interchangeability, bearing specifications are therefore classed in accordance with such standards. Specifically, SNFA bearing are designed and manufactured in accordance with the following standards:
- Overall dimension, radii ABMA Std 20 (Equivalent to ISO 15)
- Dimensional tolerance ABMA Std 20 (Equivalent to ISO 492)
- Running accurary tolerance ABMA Std 20 (Equivalent to ISO 492)
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Angular Ball Bearings with Ceramic Balls for Super High Speed Operation
These bearings present the super high speed dn value, 2,100,000 (as dmn value; 2,600,000) using air-oil lubrication. Boundary dimensions are equal to the ISO standard series, but super high speed revolution using air-oil lubrication can be obtained. Bearings also operate under high acceleration conditions.
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