Standard Type Plummer Blocks

SN5 and SN6 types are the most common type, which are provided for in JIS B 1551, ISO 113/II, and DIN736, 737. SN30 and SN31 types are medium size and their shaft diameters are bigger than that of SN5 and SN6 types. For these types, a bearing is mounted with the use of an adapter.

Large Plummer Blocks

These are large size and for heavy-duty application. They have dual structure oil seals. For these types, a bearing is mounted with the use of an adapter.

Dustproof Plummer Blocks

This is a dustproof type, and this was developed by NSK. It has a combination of oil seals, labyrinth seals, and oil groove seals; therefore, it is suitable for environments with dust and other foreign matters.
For this type, a bearing is mounted with the use of an adapter.

Stepped-Shaft Type Plummer Blocks