Silverthin precision thin section bearings are manufactured in standard configurations, and are available as either sealed or unsealed units depending on requirements.To know more visit: http://www.carterbearings.co.uk/silverthin/thinsection-bearings/

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Thin Section Bearings
Silverthin Precision Thin Section Bearings Brochure »
Silverthin precision thin section bearings are manufactured in standard configurations, and are available as either sealed or unsealed
units depending on requirements. All Silverthin bearing products are manufactured in the USA in line with the strict regulations set out under
the Berry amendment. There are a wide variety of bearings available in a wide variety of materials, coatings and lubrication combinations.
The product range comprises of the following standard cross sectional sizes: (Each cross section below is linked to the catalogue)
UNSEALED A, C & X TYPE
SERIES SECTION ID OD
SAA
3/16″
.187
1.000
to
1.750
1.375
to
1.9903/16″.187
SERIES SECTION ID OD
SA
1/4″
.250
2.000
to
12.000
2.500
to
12.5001/4″.250
MENU

2. SERIES SECTION ID OD
SB
5/16″
.3125
2.000
to
20.000
2.625
to
20.6255/16″.3125
SERIES SECTION ID OD
SC
3/8″
.375
4.000
to
30.000
4.750
to
30.7503/8″ .375
SERIES SECTION ID OD
SD
1/2″
.500 4.000
to
30.000
5.000
to
31.0001/2″.500
SERIES SECTION ID OD
SF
3/4″
.750 4.000
to
35.000
5.500
to
36.5003/4″.750
SEALED C & X TYPE
SERIES SECTION ID OD
JSA
1/4″
.250
2.000
to
6.500
2.500
to
7.0001/4″.250
SERIES SECTION ID OD
JSB
5/16″
.3125
2.000
to
6.500
2.625
to
7.1255/16″.3125
SERIES SECTION ID OD
JSU
1/2″
.500 4.000
to
12.000
4.750
to
12.7503/8″.375

3. Standard and Special Large Diameter Unsealed and Sealed Silverthin Bearings are available upon request.
These bearings are available in a variety of cross sections to meet customer needs. Email your request to us and we will advise
availability or help you with your special application requirements.
SERIES SECTION ID OD
SG
1″
.1000
4.000
to
35.000
6.000
to
37.0001″.1000
Type “A” – Angular Contact
In applications with axial loads in one direction the A-Type, angular contact ball bearing should be used. This bearing
also works well in radial or combined radial-thrust applications. The A-Type bearing should never be used alone to support
moment loads or reversing axial loading.
Type A Load Condition
Radial Axial Moment Reversing Axial Combined Radial Thrust
Good Excellent
Use in pairs
Excellent
Use in pairs
Excellent
Good
Type “C” – Radial Contact
The C-Type, radial contact ball bearing is designed with deep ball grooves to withstand high loads. Although this bearing
is used primarily in applications with radial loads, it can withstand moderate axial loads, reversing axial loads, and
moment loads.
Type C Load Condition
Radial Axial Moment Reversing Axial Combined Radial Thrust
Excellent Good Good (light to moderate loads) Good (light to moderate loads) Good
Type “X” – 4-Point Contact
The X-Type, or 4-point contact, ball bearing is ideal for moment loading. X-Type bearings are designed with Gothic arch
raceways creating four contact points between the balls and the raceways. This design is excellent for moment loading
and reversing axial loading. The X-Type bearing can be used for other light loading conditions, but is not recommended in
place of the C- or A-Type bearing for pure radial loads.
When specifying this type of bearing for use with axial or moment loads combined with radial loads application speed
(rpm) should be carefully considered. Please contact Carter engineering department for information on combined load and limiting speeds.
Type X Load Condition

4. Radial Axial Moment Reversing Axial Combined Radial Thrust
Poor Good Excellent Excellent Poor
Please contact Carter for radial bearing use with combined radial loads with axial or moment loading and for limiting speeds and separator
selection.
Two A-Type bearings are often used as a duplex pair. Different configurations for duplex bearings are shown in the Engineering section of the
product catalogue.
Please consult Carter engineering for application of these bearings.
Special non standard bearings are engineered and manufactured up to 40 inches in diameter, some from special materials, to serve the
needs of our diverse customer base.
Precision Thin Section Bearings
As with all bearings, precision thin bearings can improve the overall efficiency of your
machinery or equipment. From greater accuracy and reliability to higher speed – put simply
they help you increase your profit and build on the service you offer your clients. They also
help to lower the running cost of your machinery and lead to less frequent services.
What makes precision thin section bearings unique is that on top of the aforementioned
benefits, they also offer reduced friction and increased design flexibility. Thanks to their size
and shape they also help to save weight and create additional space.
From medical equipment and aerospace telescopes to fridges and ceiling fans, bearings
can be found in almost every mechanism that involves movement. As with all bearings, the
precision thin section type work on a very simple principle – things move better when friction
is reduced. They can drastically improve the overall efficiency of your machinery or
equipment, and at a fraction of the size and weight of a standard bearing.
Inspection
Due to the large diameters and thin sections of these products, it is necessary to address measurement and inspection techniques. To
accurately measure the bore and outside diameters of thin section bearings, a specific procedure must be followed.
Appropriate measuring equipment must be used which will allow the inspector to take 3 to 5 readings around the circumference, which are
then averaged to determine the true measurement of the bearing in the free state i.e. (unmounted). This procedure allows for the inherent out-
of-roundness these particular bearings will exhibit. When measuring, special care must be exercised to ensure neither the bearing weight nor
pressure from the measuring equipment affects the measurements.
Installation
If thin section bearings are being installed into a housing, pressure should be applied only on the outer ring. Bearings to be installed on a
shaft should be pushed on the inner ring. Since the majority of Silverthin products are open (without seals), a clean, contaminant-free
installation area is advised.
Lubrication
Rolling element bearings rely on ball and raceway surface lubrication. A thin film of oil or grease should be used. Be sure not to contaminate
the lubricant. Our standard open (unsealed) bearings are shipped with only a light oil as a corrosion inhibitor. You must lubricate these with
the appropriate grease or oil for your application. Sealed bearings are shipped as standard practice with 20% – 30% fill of Mil-G-81322
grease.
Load Ratings

5. Information listed on this website such as load ratings and bearing dimensional data has
been compiled from industry standard data as well as ABMA and ANSI information and
formulas. Technical information and ratings have been modified from empirical data and test
data from Silverthin™ load capacities shown on the website are not additive. For combined
radial and axial loading an equivalent radial loading must be calculated.
Thin Section Bearing Housing & Shaft Fits
Thin section bearings are affected by the tolerance, roundness, and expansion & contraction
rates of the housing & shafts used to mount them. The “Precision tolerances &
Recommended Fits” shown on this website are for bearings with standard diametric
clearance and steel shafts & housings. Those with special clearances or preloads and those which are mounted in, or have shafts in,
materials other than steel, will need special internal clearance consideration to account for different expansion & contraction rates of dissimilar
materials.
Thin Section Bearings with Thin Dense Chrome Plating
NTDC – Nodular Thin Dense Chrome Plated bearing rings of 52100 steel are designated
with an “A” in the Silverthin™ part numbering system. This electro-deposited chrome plating
process will not chip, crack or peel under severe stress experienced in bearing raceways.
This process increases corrosion resistance, improves surface hardness to the Rc70-Rc78
range which in turn reduces friction and helps retain lubrication. Silverthin apply this plating
to their standard 52100 steel inner and outer rings so allowances must be made to standard
housing and shaft fits to allow for the plating build up on the exposed surfaces, especially
the bore and outside diameter. The plating build up per surface can generally be from
.000040 inch to .00015 inch. Contact us at Carter for bore and shaft fits.
Silverthin Thin Section Bearing Specifications:
Races (rings) AISI 52100 vacuum degassed bearing steel
Heat treatment Through hardened and stabilized for use at -65 degrees F to +250 degrees F. Please check with factory for operating
temperatures for sealed bearings
Balls AISI 52100, 440C or ceramic (Silicone Nitride)
Seals Buna-N rubber-metal reinforced
Cages “A” type – circular pocket G, H, R, U, & F “C” & “X” type – snapover type D, N, P, L, T
& F
Diametric Clearance ABMA standard 26.2
Preloads ABMA standard 26.2
Internal geometry ABMA standard 26.2
Identification All Silverthin™ bearings are marked with part number, lot code and “Silver” on
the outside diameter
Cleaning Immersion and agitation with preservative oil applied.
Packaging Sealed in plastic and boxed up to 12″ bore. Boxing or special packaging as required.
Quality Operating Groups of Mechatronics Inc. including Silverthin Bearing Group are registered to the ISO 9001:2000 quality standard. A
copy of the registration certificate is available upon request.
Lubrication Sealed bearings 20% – 30% fill of Mil-G-81322 grease. Open bearings are dipped in light oil as a corrosion inhibitor (not intended
to be a bearing lubricant).

6. A list of applications and equipment where thin section bearings are
used
Medical, rotary polishing, X-ray – MRI, rotary pipe cutting, rotary welding and semi-
conductor equipment. Rotary actuators, rotary work holding tables, aerospace – auxiliary
equipment (not flight critical), turrets, gun turrets, turntables, gun barrel mounts, indexing
tables, missile launchers, machine tools, lathe accessories and radar equipment. Robotics,
radar drives, antenna pedestals, satellite antennas and labelling machines.
Equipment for packaging, truck mounted communication, food processing, bottling and
converting. Telescope bases, wallpaper & screen printing, camera mounts, camera lenses,
textile and knitting machinery. Optical drivers, tyre production equipment, security camera mounts, wire handling, winding & bonding
equipment, orbital welding, sensors, oil well equipment, mounts for sensors. Blow out protectors, instrument mounts, king post bearing
applications, gimbals and gimbal assemblies, gear boxes, slip rings, transmission gear & chain, rotary unions, rotary joints and clutch
backstops.
Precision Thin Section Bearings
As with all bearings, precision thin bearings can improve the overall efficiency of your machinery or equipment. From greater accuracy and
reliability to higher speed, put simply they help you increase your profit and build on the service you offer your clients. They also help to lower
the running cost of your machinery and lead to less frequent services.
What makes precision thin section bearings unique is that on top of this they also offer reduced friction and increased design flexibility.
Thanks to their size and shape they also help to save weight and create additional space.
From medical equipment and aerospace telescopes to fridges and ceiling fans, bearings can be found in almost every mechanism that
involves movement. As with all bearings, precision thin section bearings work on a very simple principle – things move better when friction is
reduced. Precision bearings from Silverthin can drastically improve the overall efficiency of your machinery or equipment, and at a fraction of
the size and weight of a standard bearing. For greater accuracy, reliability and speed from your engineering application, call Carter Bearings
today.
Here at Carter Bearings our strength lies in finding the solution to your individual engineering problems, and providing them at the most
competitive prices. If your machinery is used in an application where size, weight and space are at a premium, from the aerospace industry to
the production of food processing equipment; your solution may lie in precision bearings. Precision thin section bearings provide unique
solutions as the bearing width and section (distance from bore to outside diameter) in each series remain constant regardless of the change
in bore diameter, offering reduced friction and increased design flexibility – even at sizes of up to 40 inches in diameter.
Why Choose Carter Bearings?
Here at Carter Bearings, we understand that no single bearing is appropriate for every single application. Some applications require special
bearings in order to cope with the demands of the harsh environments they’re to be used in, such as ultra-high vacuum, cryogenic and the
clean requirements of the pharmaceutical industry.
Since 1999 Carter Manufacturing Ltd. has been providing engineering solutions to various industries across Europe. Over time, we have
expanded our range and built our reputation to such great heights that we are now the European Master Distributor of the Silverthin product
range. We carry a large stock of Silverthin products in our UK warehouse and can order in any specialised or large bearing from the entire
range on request.
Our team of experts have a deep understanding of both the interactions and applications of thin section bearings. We are entirely focussed
on understanding your engineering problems, and constantly strive to produce the best solutions to each individual application. We have
proven able to provide the best engineering solutions to the industry at the most affordable prices across a range of currencies. No matter
where you are in the world, Carter Bearings has a solution for you.
If your machinery is used in an application where size, weight and space are at a premium, from the aerospace industry to the production of
food processing equipment; your solution may lie in precision thin section bearings. Call today for more information on our extensive Silverthin
range.

7. For more information please contact us »
Browse: Home / Silverthin / Thin Section Bearings
Silverthin Products
Thin Section Bearings
SAA Series 3/16 x 3/16
SA Series 1/4 x 1/4
SB Series 5/16 x 5/16
SC Series 3/8 x 3/8
SD Series 1/2 x 1/2
SF Series 3/4 x 3/4
SG Series 1 x 1
JSA Sealed Series 1/4 x 1/4
JSB Sealed Series 5/16 x 5/16
JSU Sealed Series 3/8 x 1/2
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