SNI split plummer block housings
A split plummer block to DIN 736 and 737 — the most bought HFB series and the usual replacement for SNL housings.
SNI housings take self-aligning ball and spherical roller bearings, mounted on the shaft directly or on an adapter sleeve. They are designed for grease lubrication only; the manufacturer will drill lubrication holes on request.
The bearing seat is machined to H8. A locating bearing is obtained by fitting one or two fixing rings between the housing shoulder and the bearing outer ring.
They come with felt seals as standard. For high temperatures or heavy dirt loads other seal arrangements can be ordered. Where the shaft ends inside the housing, a cover plate replaces the seal on one side.
Under the SSNI designation the same housing is available with a reinforced base — standard without holes in the base, with two or four on request.
Source
HFB catalogue 2011/03, page 6.

- Dimensional standard
- DIN 736 and 737
- Seat tolerance
- H8
- Material
- grey cast iron GG 20; GGG 40 and GS 45 on request
- Seal
- felt as standard
- Bearing
- spherical roller and self-aligning ball
- Lubrication
- grease
- items in the catalogue
- 224
Dimensional equivalents
- SKF SNL 208-307
- SKF SNL 209
- SKF SNL 210
- SKF SNL 211
- SKF SNL 212
- SKF SNL 213
- SKF SNL 215
- SKF SNL 216
- SKF SNL 217
- SKF SNL 218
- SKF SNL 507-606
- SKF SNL 508-607
- SKF SNL 509
- SKF SNL 510-608
- SKF SNL 511-609
- SKF SNL 512-610
- SKF SNL 513-611
- SKF SNL 515-612
- SKF SNL 516-613
- SKF SNL 517
- SKF SNL 518-615
- SKF SNL 519-616
- SKF SNL 520-617
- SKF SNL 522-619
- SKF SNL 524-620
- SKF SNL 526
- SKF SNL 528
- SKF SNL 530
- SKF SNL 532
Other series
- SNThe same design as SNI but to DIN 736 through 739, with a tighter seat — H7 instead of H8.
- SDA split housing for heavy loads, with a labyrinth seal as standard and stronger GG 25 iron.
- GOS / GOFHousings for high speeds and temperatures, oil-lubricated through a splash ring. Mostly in fan assemblies.
- BTLSolid GS 45 cast steel housings for conveyor drums, with a double labyrinth at both ends.
- STLSplit take-up housings for conveyor drums, in GS 45 cast steel with a double labyrinth.
- TVNUnsplit housings for self-aligning ball bearings with a cylindrical bore, supplied as floating bearings.