The Timken Company
The Timken Company
4500 Mt Pleasant St. NW
N. Canton, OH 44720
Phone: (234) 262-3000
E-Mail: CustomerCAD@timken.com • Web site: www.timken.com
Print Back
  • 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.
Unit of Measure

Specifications

Bearing Number

 N/A 22318

Diameter S-2

 N/A 4 1/8 in

Diameter S-3

 N/A 3.3750 in

A

 N/A 4-15/16 in

B

 N/A 15.5 in

C

 N/A 4.375 in

D

 N/A 2 in

E Max.

 N/A 13.5 in

E Min.

 N/A 12 in

F

 N/A 2-1/4 in
H1 N/A 9.1875 in

Oil Level K

 N/A 2 in
L2 N/A 7 in

Y

 N/A 2.0469 in

No. of Base Bolts Required

 N/A 4

Size of Base Bolts Required

 N/A 3/4

Bolt Hole Length

 N/A 1.5 in

Bolt Hole Width

 N/A 0.75 in

Locknut

 N/A AN18

Lockwasher

 N/A W18
Housing Only3 N/A SAF318
Stabilizing Ring 1 Req'd4 N/A SR-21-18

Triple Seal 2 Req’d at S-2

 N/A LOR112

Triple Seal 2 Req’d at S-3

 N/A LOR191

Seal Type

 N/A Triple Ring Seal

Full Timken Part Number

 N/A SAF22318

Basic Load Ratings

C0 - Static Radial Rating

 N/A 148000 lbf659000 N

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

 N/A 136000 lbf606000 N

Factors

e - ISO Factor5 N/A 0.32
Y0 - ISO Factor6 N/A 2.04
Y1 - ISO Factor7 N/A 2.09
Y2 - ISO Factor8 N/A 3.11

Reference Thermal Speed Rating (Grease)

 N/A 2900 rpm
Reference Thermal Speed Rating (Oil)9 N/A 3400 rpm
Cg - Geometry Factor10 N/A 0.0685
  • 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 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 6 These factors apply for both inch and metric calculations. See engineering
  • 7 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 8 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 9 See thermal speed ratings in the engineering section.
  • 10 Geometry constant for Lubrication Life Adjustment Factor a3l.