All Product Types > ENGINEERED BEARINGS > Mounted Bearings > Mounted SAF Split-Block Spherical Roller Bearings > Inch Straight Bore Mounting Pillow Block SDAF231 and SDAF232 Series > Part Number SDAF 23256  

Part Number SDAF 23256, 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.




Specifications  · Basic Load Ratings  · Factors

Specifications

Bearing Number
23256

Diameter S-2
12 1/2 in

Diameter S-3
10.7500 in

A
12 in

B
38.25 in

C
14.75 in

D
3.375 in

E Max.
33.5 in

E Min.
32.75 in

F
9 in

H1
23.4375 in

Oil Level K
4.375 in

L2
15.875 in

No. of Base Bolts Required
4

Size of Base Bolts Required
1 5/8

Bolt Hole Length
2 in

Bolt Hole Width
1.625 in

Locknut
NO56

Lockplate
P56

Housing Only3
SDAF3256

Stabilizing Ring 1 Req'd4
A8975

Triple Seal 2 Req’d at S-2
ER866-1

Triple Seal 2 Req’d at S-3
ER826-1

Full Timken Part Number
SDAF23256
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.


Basic Load Ratings

C0 - Static Radial Rating
1180000 lbf
5250000 N

C1(2) - Dynamic Radial Rating (Two-Rows)
828000 lbf
3680000 N


Factors

e - ISO Factor1
0.33

Y0 - ISO Factor2
2.02

Y1 - ISO Factor3
2.07

Y2 - ISO Factor4
3.08

Reference Thermal Speed Rating (Grease)
590 rpm

Reference Thermal Speed Rating (Oil)5
650 rpm

Cg - Geometry Factor6
0.1232
1 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
2 These factors apply for both inch and metric calculations. See engineering
3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
4 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
5 See thermal speed ratings in the engineering section.
6 Geometry constant for Lubrication Life Adjustment Factor a3l.