FYH NA311-32 Insert Bearing, 2 in Bore, Eccentric Collar, 120 mm O.D.
Available
The FYH NA311-32 is an eccentric collar insert bearing with a 2 in bore (50.8 mm). It measures 120 mm (4.724 in) O.D., with a basic dynamic load rating of 71.6 kN and a static rating of 45 kN.
It has a wide inner ring with an eccentric locking collar and a spherical O.D. for a housing with a matching spherical bore; the 3 in the part number is diameter series 3 (heavy duty).
Where this product is used
- Replacement insert for a plummer block or pillow block unit
- Replacement insert for flange and take-up housings with a matching spherical bore
- Conveyor rollers, drive shafts and idler stations
- Fans, blowers and pumps
- Agricultural, construction and general industrial machinery
Features
- Eccentric locking collar for a 2 in shaft: the collar engages the inner ring and a set screw is tightened to hold it
- Spherical O.D. for housings with a matching spherical bore
- Rubber seal with metal slinger, supplied pre-lubricated with FYH grease
- Basic dynamic load rating Cr 71.6 kN and static rating C0r 45 kN
- Allowable rotating speed 2,300 rpm (standard value)
Key specifications
| Specification | Detail |
|---|---|
| Type | Insert bearing (deep groove ball bearing) with eccentric locking collar and spherical O.D. |
| Model | NA311-32 |
| Bore diameter d | 50.8 mm (2 in) |
| Outer diameter D | 120 mm (4.724 in) |
| Locking | Eccentric locking collar with a set screw |
| Outer ring | Spherical O.D. with grease groove and grease holes |
| Seal | Rubber seal with metal slinger |
| Lubrication | Supplied pre-lubricated with FYH grease |
| Duty | Diameter series 3 (heavy duty) |
| Basic dynamic load rating Cr | 71.6 kN |
| Basic static load rating C0r | 45 kN |
| Factor f0 | 13.2 |
| Allowable rotating speed (standard value) | 2,300 rpm |
| Data basis | The catalogue has no row under the designation NA311-32. O.D., Cr, C0r and f0 are taken from the catalogue row NA311-35 (same size number); the widths and mass of NA311-32 are not shown |
| Brand | FYH (FYH Inc., Japan) |
Selecting the right option
This page is for the single model NA311-32, with a 2 in bore. If you need another shaft size, the related pages below list the other sizes in this range.
Imperial (inch) bores are in fractions of an inch; the Model Details give the size in mm with the inch size in brackets: match the bore to the shaft you have.
Catalogue data basis: The catalogue has no row under the designation NA311-32. O.D., Cr, C0r and f0 are taken from the catalogue row NA311-35 (same size number); the widths and mass of NA311-32 are not shown.
Fitting and use
Check the load and speed against the catalogue figures in the Model Details before ordering, and apply a suitable safety factor. The allowable rotating speed in the catalogue is a standard value: it falls to 80% for units fitted with covers, and a loose fit between shaft and inner ring reduces it further.
Fit the collar against the inner ring so the eccentric surfaces engage, then tighten the set screw in the collar.
Match the insert to a housing with the same size number: the spherical O.D. seats in a matching spherical housing bore.
If you are unsure which insert suits a shaft and housing, send AIMS the part numbers or sizes and we will confirm the fit.
Related products
Related FYH insert bearing pages: NA300 heavy duty insert bearings, 35 to 60 mm bore (metric), NA200 insert bearings, 20 to 60 mm bore (metric), NA200 insert bearings, 3/4 and 1 5/8 in bore (imperial) and NA200 insert bearings, 1 to 2 1/4 in bore (imperial).
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