The Timken Company - Inch Straight Bore Mounting Pillow Block SDAF231 and SDAF232 Series

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Each assembly includes the housing cap and base, cap bolts, bearing, locknut and washer, stabilizing ring and triple ring seals.
To order pillow block housing only, use the numbers listed in the "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., SDAFS 23152).
For fixed applications, both stabilizing rings must be used. Do not use stabilizing rings for “Float” mounting.

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Unit of Measure

Items	SDAF 23248 Inch Straight Bore Mounting Pillow Block SDAF231 and SDAF232 Series	SDAF 23152 Inch Straight Bore Mounting Pillow Block SDAF231 and SDAF232 Series	SDAF 23252 Inch Straight Bore Mounting Pillow Block SDAF231 and SDAF232 Series	SDAF 23156 Inch Straight Bore Mounting Pillow Block SDAF231 and SDAF232 Series	SDAF 23256 Inch Straight Bore Mounting Pillow Block SDAF231 and SDAF232 Series
Bearing Number	N/A 23248	N/A 23152	N/A 23252	N/A 23156	N/A 23256
Diameter S-2	N/A 10 1/2 in	N/A 11 1/2 in	N/A 11 1/2 in	N/A 12 1/2 in	N/A 12 1/2 in
Diameter S-3	N/A 9 3/16 in	N/A 9 15/16 in	N/A 9 15/16 in	N/A 10.7500 in	N/A 10.7500 in
A	N/A 10.25 in	N/A 10.25 in	N/A 12 in	N/A 12 in	N/A 12 in
B	N/A 35 in	N/A 35 in	N/A 38.25 in	N/A 38.25 in	N/A 38.25 in
C	N/A 13.125 in	N/A 13.125 in	N/A 14.75 in	N/A 14.75 in	N/A 14.75 in
D	N/A 3.75 in	N/A 3.75 in	N/A 3.375 in	N/A 3.875 in	N/A 3.375 in
E Max.	N/A 30.5 in	N/A 30.5 in	N/A 33.5 in	N/A 33.5 in	N/A 33.5 in
E Min.	N/A 29 in	N/A 29 in	N/A 32.75 in	N/A 32.75 in	N/A 32.75 in
F	N/A 8.75 in	N/A 8.75 in	N/A 9 in	N/A 9 in	N/A 9 in
H¹	N/A 20.875 in	N/A 20.875 in	N/A 23.4375 in	N/A 23.4375 in	N/A 23.4375 in
Oil Level K	N/A 3.5625 in	N/A 3.375 in	N/A 4.75 in	N/A 4.75 in	N/A 4.375 in
L²	N/A 14.25 in	N/A 14.25 in	N/A 15.875 in	N/A 15.875 in	N/A 15.875 in
No. of Base Bolts Required	N/A 4
Size of Base Bolts Required	N/A 1 5/8
Bolt Hole Length	N/A 2.375 in	N/A 2.375 in	N/A 2 in	N/A 2 in	N/A 2 in
Bolt Hole Width	N/A 1.625 in
Locknut	N/A NO48	N/A NO52	N/A NO52	N/A NO56	N/A NO56
Lockplate	N/A P48	N/A P52	N/A P52	N/A P56	N/A P56
Housing Only³	N/A SDAF3248	N/A SDAF3152	N/A SDAF3252	N/A SDAF3156	N/A SDAF3256
Stabilizing Ring 1 Req'd⁴	N/A A5679	N/A A5679	N/A A8968	N/A A8967	N/A A8975
Triple Seal 2 Req’d at S-2	N/A ER710-1	N/A ER832-1	N/A ER866-1	N/A ER866-1	N/A ER866-1
Triple Seal 2 Req’d at S-3	N/A ER923-1	N/A ER751-1	N/A ER826-1	N/A ER826	N/A ER826-1
Assembly Weight	N/A 1100 lb	N/A 1050 lb	N/A 1350 lb	N/A 1250 lb	N/A 1400 lb
Full Timken Part Number	N/A SDAF23248	N/A SDAF23152	N/A SDAF23252	N/A SDAF23156	N/A SDAF23256
C0 - Static Radial Rating	N/A 935000 lbf4160000 N	N/A 885000 lbf3930000 N	N/A 1090000 lbf4850000 N	N/A 937000 lbf4170000 N	N/A 1180000 lbf5250000 N
C1(2) - Dynamic Radial Rating (Two-Rows)	N/A 685000 lbf3050000 N	N/A 603000 lbf2680000 N	N/A 790000 lbf3510000 N	N/A 626000 lbf2780000 N	N/A 828000 lbf3680000 N
e - ISO Factor⁵	N/A 0.35	N/A 0.3	N/A 0.34	N/A 0.3	N/A 0.33
Y0 - ISO Factor⁶	N/A 1.88	N/A 2.18	N/A 1.94	N/A 2.21	N/A 2.02
Y1 - ISO Factor⁷	N/A 1.92	N/A 2.23	N/A 1.98	N/A 2.26	N/A 2.07
Y2 - ISO Factor⁸	N/A 2.86	N/A 3.31	N/A 2.95	N/A 3.36	N/A 3.08
Reference Thermal Speed Rating (Grease)	N/A 720 rpm	N/A 830 rpm	N/A 650 rpm	N/A 770 rpm	N/A 590 rpm
Reference Thermal Speed Rating (Oil)⁹	N/A 790 rpm	N/A 930 rpm	N/A 710 rpm	N/A 870 rpm	N/A 650 rpm
Cg - Geometry Factor¹⁰	N/A 0.1115	N/A 0.1162	N/A 0.1185	N/A 0.1206	N/A 0.1232
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.