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
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  • Each assembly includes the housing cap and base, cap bolts, bearing, bearing adapter, locknut and lockwasher, stabilizing ring and triple ring seals.
  • To order pillow block housing only, use the number listed in the "Housing Only" column. These units include: cap, base, cap bolts, triple ring seals and stabilizing ring.
  • Assembly and pillow blocks as 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.
  • Assemblies shown are furnished in cast iron. If cast steel is desired, add the letter "S" to the alpha prefix (e.g., SDAFS 22515).

When ordering non-standard pillow block assemblies specify the shaft size.
timken-SAF-pillow-block-mounted-spherical-roller-bearing-unit-4-bolt-with-4-cap-bolts
Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series
Unit of Measure
Items timken-SAF-pillow-block-mounted-spherical-roller-bearing-unit-4-bolt-with-4-cap-bolts
SDAF 22617 2-7/8
Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series 		timken-SAF-pillow-block-mounted-spherical-roller-bearing-unit-4-bolt-with-4-cap-bolts
SDAF 22617
Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series 		timken-SAF-pillow-block-mounted-spherical-roller-bearing-unit-4-bolt-with-4-cap-bolts
SDAF 22617 3
Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series 		timken-SAF-pillow-block-mounted-spherical-roller-bearing-unit-4-bolt-with-4-cap-bolts
SDAF 22618 3-1/16
Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series 		timken-SAF-pillow-block-mounted-spherical-roller-bearing-unit-4-bolt-with-4-cap-bolts
SDAF 22618 3-1/8
Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series
Bearing Number N/A 22317K N/A 22317K N/A 22317K N/A 22318K N/A 22318K
Diameter S-1 N/A 2.8750 in N/A 2 15/16 in N/A 3 in N/A 3.0625 in N/A 3.1250 in
A N/A 4.5 in N/A 4.5 in N/A 4.5 in N/A 4.75 in N/A 4.75 in
B N/A 15-1/4 in N/A 15-1/4 in N/A 15-1/4 in N/A 15.5 in N/A 15.5 in
C N/A 6 in N/A 6 in N/A 6 in N/A 6.125 in N/A 6.125 in
D N/A 1 7/8 in N/A 1 7/8 in N/A 1 7/8 in N/A 2 in N/A 2 in
E Max. N/A 13.125 in N/A 13.125 in N/A 13.125 in N/A 13.5 in N/A 13.5 in
E Min. N/A 11.625 in N/A 11.625 in N/A 11.625 in N/A 12 in N/A 12 in
F N/A 3.375 in N/A 3.375 in N/A 3.375 in N/A 3.625 in N/A 3.625 in
H1 N/A 8.9375 in N/A 8.9375 in N/A 8.9375 in N/A 9.4375 in N/A 9.4375 in
Oil Level K N/A 1.8125 in N/A 1.8125 in N/A 1.8125 in N/A 2 in N/A 2 in
L2 N/A 6.75 in N/A 6.75 in N/A 6.75 in N/A 6.8750 in N/A 6.8750 in
Y N/A 1.8906 in N/A 1.8906 in N/A 1.8906 in N/A 2.0469 in 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
Adapter Assembly Number3 N/A SNW-117 x 2-7/8 N/A SNW-117 x 2-15/16 N/A SNW-117 x 3 N/A SNW-118 x 3-1/16 N/A SNW-118 x 3-1/8
Housing Only4 N/A SDAF617 x 2-7/8 N/A SDAF617 N/A SDAF617 x 3 N/A SDAF618 x 3-1/16 N/A SDAF618 x 3-1/8
Stabilizing Ring 1 Req'd5 N/A SR-20-17 N/A SR-20-17 N/A SR-20-17 N/A SR-21-18 N/A SR-21-18
Triple Seal Req'd N/A LOR 58 N/A LOR 59 N/A LOR 60 N/A LOR 67 N/A LOR 68
Assembly Weight N/A 94 lb N/A 94 lb N/A 94 lb N/A 137 lb N/A 137 lb
Full Timken Part Number N/A SDAF226172-7/8 N/A SDAF22617 N/A SDAF226173 N/A SDAF226183-1/16 N/A SDAF226183-1/8
C0 - Static Radial Rating N/A 131000 lbf584000 N N/A 131000 lbf584000 N N/A 131000 lbf584000 N N/A 148000 lbf659000 N N/A 148000 lbf659000 N
C1(2) - Dynamic Radial Rating (Two-Rows) N/A 122000 lbf543000 N N/A 122000 lbf543000 N N/A 122000 lbf543000 N N/A 136000 lbf606000 N N/A 136000 lbf606000 N
e - ISO Factor6 N/A 0.32
Y0 - ISO Factor7 N/A 2.06 N/A 2.06 N/A 2.06 N/A 2.04 N/A 2.04
Y1 - ISO Factor8 N/A 2.11 N/A 2.11 N/A 2.11 N/A 2.09 N/A 2.09
Y2 - ISO Factor9 N/A 3.14 N/A 3.14 N/A 3.14 N/A 3.11 N/A 3.11
Reference Thermal Speed Rating (Grease) N/A 3000 rpm N/A 3000 rpm N/A 3000 rpm N/A 2900 rpm N/A 2900 rpm
Reference Thermal Speed Rating (Oil)10 N/A 3500 rpm N/A 3500 rpm N/A 3500 rpm N/A 3400 rpm N/A 3400 rpm
Cg - Geometry Factor11 N/A 0.0662 N/A 0.0662 N/A 0.0662 N/A 0.0685 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 Includes sleeve, locknut and lockwasher. Add shaft size to order.
  • 4 "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.
  • 5 Stabilizing ring is used for fixed (FX) block; do not use for float (FL) mounting.
  • 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 See thermal speed ratings in the engineering section.
  • 11 Geometry constant for Lubrication Life Adjustment Factor a3l.