The Timken Company - Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series

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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.

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Unit of Measure

Items	SDAF 22617 2-7/8 Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series	SDAF 22617 Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series	SDAF 22617 3 Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series	SDAF 22618 3-1/16 Inch Tapered Bore Mounting Pillow Block SDAF225 and SDAF226 Series	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.