SD split plummer block housings
A split housing for heavy loads, with a labyrinth seal as standard and stronger GG 25 iron.
Series SD 30.. and SD 31.. are split housings for spherical roller bearings on an adapter sleeve. They come with labyrinth seals as standard; where the shaft ends inside, a grey cast iron end cover is fitted.
To fit the labyrinth onto the shaft, a Perbunan cord is laid between the shaft and the labyrinth ring. It seals and lets the ring move axially as the shaft expands with heat.
Series SD 5.. are supplied with double felt seals as standard; a labyrinth is an option there.
The bolts joining the upper and lower parts are class 8.8. With an angled load, check not only the housing but those bolts and the holding-down bolts too.
SDI is the newer version of the same design: a stiffer body, marked points for sensors and a bearing-centre mark that makes fitting easier.
Source
HFB catalogue 2011/03, page 34, and the manufacturer's SDI leaflet.
- Material
- grey cast iron GG 25; GGG 40 and GS 45 on request
- Seal
- labyrinth (30.., 31..), double felt (5..)
- Bearing
- spherical roller on an adapter sleeve
- Lubrication
- grease
- items in the catalogue
- 194
Other series
- SNIA split plummer block to DIN 736 and 737 — the most bought HFB series and the usual replacement for SNL housings.
- SNThe same design as SNI but to DIN 736 through 739, with a tighter seat — H7 instead of H8.
- 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.