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Thin Section Bearings

Metric Extra Thin Section Bearings

While Silverthin is the premier source for Made in the USA Thin Section Bearings, sometimes they are just not thin enough. Some applications require even lighter, thinner bearings. In those cases Silverthin Extra Thin Section Bearings represent a unique option. All of these parts are made in the same internal design configurations as Silverthin Thin Section bearings, and all are Made in the USA:

  • A-Type (Angular Contact – 30°)
  • C-Type (Radial)
  • X-Type (Four Point Contact – 30°)

Aside from being Extra Thin, the cross-sections are not square. They come in two constant cross-section, variable ID sizes:

  • 2mm Wide x 3mm High
  • Standard with no cage

These bearings provide a unique solution for small spaces and provide less torque than more common bushing or plain bearings that may be used. It is recommended that Silverthin Engineering be consulted by any designer wanting to use Silverthin Extra Thin Section bearings. Their unique geometry requires extra considerations.

Full complement or spacer balls standard
1/16" balls
  1. Load capacities are not additive
  2. The maximum shaft or housing fillet radius that the bearing corners will clear for this series is 0.25mm
  3. Race Width Tolerance: +0.000 -0.127mm

A-Type Metric Extra Thin BEARINGS

SILVERTHIN
PART
NUMBER
DIMENSION IN MILLIMETERS CAPACITIES IN NEWTONS APPROX
WEIGHT
GRAMS
BORE OUTSIDE
DIA
LAND
DIA
LAND
DIA
RADIAL THRUST
B D L1 L2 STATIC DYN STATIC
SM03503AS035.0004137.238.83853856705
SM06003AS060.0006662.263.86505506909
SM07003AS070.0007672.273.875061071011
SM07403AS074.0008076.277.880063073511
SM08003AS080.0008682.283.886566077512
SM09003AS090.0009692.293.897071582513
SM10003AS0100.000106102.2103.81,07576586515
Full complement or spacer balls standard
1/16" balls
  1. Load capacities are not additive
  2. The maximum shaft or housing fillet radius that the bearing corners will clear for this series is 0.25mm
  3. Race Width Tolerance: +0.000 -0.127mm

C-Type Metric Extra Thin BEARINGS

SILVERTHIN
PART
NUMBER
DIMENSION IN MILLIMETERS CAPACITIES IN NEWTONS APPROX
WEIGHT
GRAMS
BORE OUTSIDE
DIA
LAND
DIA
LAND
DIA
RADIAL
B D L1 L2 STATIC DYN
SM03503CS035.0004137.238.84204205
SM06003CS060.0006662.263.87106059
SM07003CS070.0007672.273.882567011
SM07403CS074.0008076.277.887569011
SM08003CS080.0008682.283.894572512
SM09003CS090.0009692.293.81,06078513
SM10003CS0100.000106102.2103.81,18084015
Full complement or spacer balls standard
1/16" balls
  1. Load capacities are not additive
  2. The maximum shaft or housing fillet radius that the bearing corners will clear for this series is 0.25mm
  3. Race Width Tolerance: +0.000 -0.127mm

X-Type Metric Extra Thin BEARINGS

SILVERTHIN
PART
NUMBER
DIMENSION IN MILLIMETERS CAPACITIES IN NEWTONS / N-M APPROX
WEIGHT
GRAMS
BORE OUTSIDE
DIA
LAND
DIA
LAND
DIA
RADIAL THRUST MOMENT
B D L1 L2 STATIC DYN STATIC STATIC
SM03503XS035.0004137.238.87105855557.95
SM06003XS060.0006662.263.81,21085057511.89
SM07003XS070.0007672.273.81,4109356001311
SM07403XS074.0008076.277.81,49096562513.411
SM08003XS080.0008682.283.81,6051,0156451412
SM09003XS090.0009692.293.81,8051,09569014.913
SM10003XS0100.000106102.2103.82,0051,18073515.615

Type A, C & X – Precision Class 1 (Ref. ABEC 1F)
For standard clearance bearings only

Bearing
Size
Bearing Diameters Radial & Axial Runout Rotating Shaft or
Duplex F Mounting
Stationary Shaft or
Duplex B Mounting
Standard
Bearing
Diametral
Clearance*
Bearing
Bore
Bearing
OD
Inner
Race
Outer
Race
Shaft
Diameter
Housing
Bore
Shaft Diameter Housing Bore
Nominal
+.0000
Nominal
+.0000
Radial
& Axial
Radial
& Axial
Nominal
+.0000
Nominal
+.0000
Nominal Nominal Before Installation
35 -.0130 -.0130 .0100 .0100 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
60 -.0130 -.0130 .0130 .0130 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
70 -.0130 -.0130 .0150 .0150 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
74 -.0130 -.0130 .0150 .0150 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
80 -.0130 -.0130 .0150 .0150 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
90 -.0130 -.0130 .0150 .0150 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
100 -.0130 -.0130 .0150 .0150 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
110 -.0130 -.0130 .0200 .0200 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
120 -.0130 -.0130 .0200 .0200 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
130 -.0130 -.0130 .0200 .0200 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
140 -.0130 -.0130 .0250 .0250 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
150 -.0130 -.0130 .0250 .0250 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
160 -.0130 -.0130 .0250 .0250 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460
170 -.0130 -.0130 .0250 .0250 +.0130 +.0130 +.0000 -.0130 +.0000 -.0130 .0300 .0460

  • All dimensions in millimeters
  • Tolerances for shaft and housing are for steel material under normal ambient conditions
  • Diametral clearance after installation could vary significantly if bearing, housing, and shaft tolerances are at either end of their range.
  • Race Width Tolerance
    • Single Type C, X, A Bearings: +.000 –.127
    • Duplexed Type A Pairs: +.000 –.254

Part Number Cross Reference

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