Part Number SDAF 23256, Inch Straight Bore Mounting Pillow Block SDAF231 and SDAF232 Series On The Timken Company

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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

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.

timken-SAF-pillow-block-mounted-spherical-roller-bearing-unit-4-bolt-with-4-cap-bolts

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Inch Straight Bore Mounting Pillow Block SDAF231 and SDAF232 Series

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Unit of Measure: Imperial Metric Both

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

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.

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Part Number SDAF 23256, Inch Straight Bore Mounting Pillow Block SDAF231 and SDAF232 Series