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  • Each assembly includes the housing cap and base, cap bolts, bearing, locknut and lockwasher, stabilizing ring and triple ring seals.
  • To order pillow block housing only, use the numbers listed in "Housing Only" column. These units include: cap, base, cap bolts, triple ring seals and stabilizing ring.
  • Assembly and pillow blocks described on this page constitute fixed units.
  • To order float units, specify part number plus suffix "Float" or "FL".
  • If one end closed assembly is required, specify “CL” in assembly number when ordering.
  • All assemblies shown are furnished in cast iron. If cast steel is desired, add the letter "S" to the alpha prefix (e.g., SAFS 22217).

Speed ratings are found in dimension tables in the spherical roller bearing section.
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Unit of Measure

Key Dimensions

Bearing Number

 N/A 22218

Diameter S-2

 N/A 4 1/8 in

Diameter S-3

 N/A 3.375 in

A

 N/A 4 in

B

 N/A 13.75 in

C

 N/A 3.875 in

D

 N/A 1.5 in

E Max.

 N/A 11.625 in

E Min.

 N/A 10.375 in

F

 N/A 2-1/8 in
H1 N/A 7.75 in

Oil Level K

 N/A 1.5313 in
L2 N/A 6.25 in

Y

 N/A 1.5781 in

No. of Base Bolts Required

 N/A 4

Size of Base Bolts Required

 N/A 5/8

Bolt Hole Length

 N/A 1.25 in

Bolt Hole Width

 N/A 0.625 in

Locknut

 N/A AN18

Lockwasher

 N/A W18
Housing Only3 N/A FSAF218
Stabilizing Ring 1 Req'd4 N/A SR-18-15

Triple Seal 2 Req’d at S-2

 N/A LOR96

Triple Seal 2 Req’d at S-3

 N/A LOR72

Seal Type

 N/A Triple Ring Seal

Full Timken Part Number

 N/A FSAF22218

Ratings

C0 - Static Radial Rating

 N/A 87200 lbf388000 N

C1(2) - Dynamic Radial Rating (Two-Rows)

 N/A 79700 lbf355000 N

Thermal Reference Speed - Grease 

 N/A 3500 rpm
Thermal Reference Speed - Oil 5 N/A 4300 rpm

Factors

e - ISO Factor6 N/A 0.23
Y0 - ISO Factor7 N/A 2.83
Y1 - ISO Factor8 N/A 2.9
Y2 - ISO Factor9 N/A 4.31
Cg - Geometry Factor10 N/A 0.0638
  • 1 Tolerance -0 to + 0.4 mm (-0 to +1/64 in)
  • 2 Tolerance -0 to + 0.4 mm (-0 to +1/64 in)
  • 3 "Housing Only" includes: cap, base, cap bolts, triple ring seals and stabilizing ring as required. When ordering non-standard housing only specify the shaft size.
  • 4 Stabilizing ring is used for fixed (FX) block; do not use for float (FL) mounting.
  • 5 See thermal speed ratings in the engineering section.
  • 6 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 7 These factors apply for both inch and metric calculations. See engineering
  • 8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 9 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 10 Geometry constant for Lubrication Life Adjustment Factor a3l.