FYH Bearing Unit Builder
- Housing
- —choose from the list below
- Insert
- —choose from the list below
- Adapter sleeve
- —
Pick a housing and an insert and everything else narrows to what actually fits. Enter a part number from FYH or another brand, filter by shaft size, and get the complete unit with live price and stock on every part.
Checking live stock…
Housings
Inserts
Click any photo to magnify it.
Adapter sleeves
Brand cross-reference
Have a Koyo, Nachi, NSK, NTN or SKF part number? We carry FYH housed units, so use these tables to find the FYH equivalent, then build the unit above. You can also type the other brand's code straight into the part number box and the builder will translate it.
Source: Finer Power Transmissions interchange chart (WIR bearings and housings), pages 8.1.90–8.1.93. It is a third-party chart, not an FYH document, so treat it as a starting point for identifying a part rather than a compatibility guarantee. Check dimensions, load ratings, seal type and tolerance class against both catalogues before swapping brands.
Quick guide: duty and housing style
Two questions sort most jobs: how hard is it working, and how does it bolt on? The duty ladder sets the series; the style sets the housing. The builder above only ever pairs parts that actually fit.
Duty ladder
| Duty | Housings | Inserts that go in them | Where it lands |
|---|---|---|---|
| Extra light | LF | SB200SA200 | Narrow inner ring, thin housing section. Light shafts, low load, clean sites: packaging lines, small fans, light conveyors, food handling gear. |
| Light — 200 series | P200F200FL200FC200FBPAT200 | UC200NA200SSUCSC200UK200 | The workhorse of the range. General plant and maintenance: conveyors, augers, fans and blowers, pumps, line shafting, grain handling, food and beverage lines, workshop machinery. |
| Medium — X series | PXFXFCX | UCX | Heavier bearing and heavier housing section on the same shaft size, so you lift capacity without redesigning the shaft. Loaded conveyors, feeders, timber mills, recycling and waste plant, agricultural machinery under real load. |
| Heavy — 300 series | P300F300FL300T300 | UC300NA300UK300 | Biggest section, highest load and best with shock. Quarry and mining conveyors, crushers and screens, heavy drive shafts, bulk materials handling, port and stockpile gear. |
Sitting outside the ladder: the ER / SER and SAA / CSA inserts have a cylindrical outer ring instead of a spherical one, so they do not self-align and no FYH housing takes them. They go into a cartridge or a machined seat and are sold as replacement inserts. We also stock SA208 and SB208 as inserts only; the matching size 208 extra-light housing is not in our range, so ask our team if you need one.
X-series housings take UCX inserts only. The outside dimensions differ from the UC of the same shaft size, so a UC will not sit in a PX and a UCX will not sit in a P.
Housing styles
| Style | Series | What it does | Typical industries |
|---|---|---|---|
| Pillow block | PPX | Bolts to a horizontal surface underneath or beside the shaft, with the shaft running parallel to the mounting face. The default mount and the most common housing in the range. | Every industry: conveyor frames, fan and pump bases, agricultural drives, workshop machinery. |
| Pillow block, tapped base | PA | Same shape but bolted from underneath through tapped holes rather than through slots. For mounting where you cannot get a spanner on top, or onto a machined pad. | OEM machinery, packaging equipment, tight in-frame mounting. |
| 4-bolt square flange | FFX | Bolts to a vertical face or plate with the shaft passing through it. Four bolts, so it holds alignment under load better than a two-bolt flange. | Gearbox and drive-end mounts, bulk handling, mixers and agitators, screening plant. |
| 4-bolt spigotted flange | FCFCX | A cartridge flange with a machined spigot that registers into a bore in the plate, so it locates concentrically rather than relying on the bolt holes. | OEM equipment, machinery where shaft alignment is set at build, food and processing plant. |
| 2-bolt oval flange | FLLF | Two bolts through an oval flange. Lighter, cheaper and fits where a square flange will not. LF is the extra-light version. | Light conveyors, packaging lines, agricultural implements, fans and ducting. |
| 3-bolt offset flange | FB | A bracket-style flange that sets the shaft centre off the mounting face, for when the shaft cannot sit flush with the plate. | Agricultural machinery, materials handling, retro-fits around existing framework. |
| Take-up block | T | Slides along a frame or rail so the shaft can be drawn back to tension a belt or chain, then locked off. Needs the matching take-up frame, which is a separate part. | Belt conveyors, grain and feed elevators, chain drives, quarry and recycling plant. |
Style does not change what fits inside. The insert is set by shaft size and duty, not by whether the housing is a pillow block or a flange, which is why the builder narrows both lists together.