NTN SN508 split plummer block housing

NTN SN508 is a reference of split plummer block housing, within Bearing housings. Request a quote for SN508 via WhatsApp or email with the quantity you need; we respond promptly with the quote and equivalents.

NTN SN500 and SN600 series housings are split plummer blocks: the housing opens into two halves so the bearing can be mounted and inspected without removing the shaft from the machine. They hold self-aligning ball bearings and spherical roller bearings with a tapered bore, mounted on the shaft with an adapter sleeve. MR Accesorios Industriales, in Buenos Aires, Argentina, is an official NTN distributor.

In the designation, SN stands for the split pillow block housing and the digits that follow identify the bearing it holds: in SN506, the 5 refers to the normal-width bearing series and 06 to the bearing bore code (06 × 5 = 30 mm). With an adapter sleeve, that bearing fits a 25 mm shaft. The SN600 series follows the same logic for series 3 bearings, which have a larger cross-section. The housing number is not the shaft diameter.

Each size accepts self-aligning ball bearings and spherical roller bearings with the same bore code and a tapered bore, always with the adapter sleeve that matches the bearing. Locating rings on both sides hold the bearing axially; without them the bearing floats and follows the thermal expansion of the shaft, which is the usual arrangement at the opposite support.

Sealing is provided by seals at the shaft openings (double-lip, felt or labyrinth, depending on temperature, speed and contamination) and by an end cover when the housing sits at the end of the shaft. Grease is the usual lubricant, replenished through the grease fitting in the cap.

They are used in belt conveyors, fans, pumps, mills, screens and long line shafts in mining, agriculture, cement and food processing. The base is bolted to the frame; check that the support surface is flat and aligned before tightening the caps, because a twisted base loads the bearing.

The main dimensions of SN housings are standardised, so an NTN SN housing takes the place of the equivalent housing from another brand on the same frame: check the shaft height, the bolt-hole spacing and the sealing. Send us the housing or bearing part number on WhatsApp and we will quote it.