NTN-SNRSC.213.DSBearing Housing Seal 65 mm Inner Diameter for 213 Size Split Plummer Block — Lot of 7

Product Description

What this part is

This is a bearing housing seal with a published inner diameter of 65 mm, catalogued as a bearing housing accessory. It is the ring-shaped seal that fits into the seal bore at each end of a split plummer block housing, closing the gap between the housing and the rotating shaft so grease stays in and dirt and water stay out.

Quantity and configuration

Unit Quantity: one lot of seven seals. One saleable unit, seven pieces inside it. A single housing takes two seals, one at each end, so a lot of seven covers three housings with one spare.

What the 65 mm inner diameter tells you

The seal inner diameter has to match the shaft it runs on, not the bearing bore or the housing seating diameter. A 65 mm inner diameter lines up with a 213-series bearing of cylindrical bore mounted directly on a 65 mm shaft. That is the significant detail, because the same 213-size housing can also be built with a tapered-bore bearing on an adapter sleeve, and that arrangement puts a 60 mm shaft through the housing instead. A seal sized for 65 mm suits a 65 mm shaft; on a 60 mm shaft there would be a 2.5 mm radial gap all the way round.

Establish which shaft diameter your housing is built around by measuring the old seal bore or the shaft at the seal position, because the housing designation does not determine shaft size.

How this relates to the TSN 213 seal

SC 213 DS is the functional analogue of the TSN 213 seal — both are 65 mm inner diameter seals for a 213-size split plummer block housing, performing the same job in the same position. That makes it the natural search term if you have been quoted a TSN 213 and are looking at alternatives.

Split-housing seal grooves from different manufacturers are dimensionally similar, because they are all built around the same bearing sizes. Groove width, groove depth and the outside diameter of the seal ring can differ between makes. Treat it as follows: SNR housing seal, 65 mm inner diameter, SKF equivalent is TSN 213.

Published data

Manufacturer: NTN-SNR (SNR brand).

Product class: bearing housing seal / bearing housing accessory.

Inner diameter: 65 mm.

EAN: 3413520644246.

Quantity: one lot of seven pieces.

Why the housing seal is worth getting right

Housing seals fail quietly and take the bearing with them. A split pedestal block on a conveyor or fan shaft carries its grease in the housing cavity; the seals at each end are the only thing keeping that grease in place and keeping abrasive dust, washdown water and process material out. Once a seal is worn or wrongly sized, grease escapes, contamination enters, and the bearing fails from abrasive wear months before its fatigue life would have ended. Replacing seals at every bearing service is routine practice for that reason, and it is why seals are stocked in multiples rather than bought one at a time.

Interchange guidance

Search forms that reach this part include SC 213 DS, SC213DS, SC.213.DS, SNRSC213 and SC213SNR. The functional SKF equivalent is TSN 213 A, or TSN 213 generally. SNR bearing operations are part of NTN-SNR, so SNR is the legacy brand name on current NTN-SNR product. The matching 213-size housing is the SKF SNL 213 split plummer block, SKU B-BF5COM#NPZN7N.