Plummer block bearings are bearing assemblies with split pedestal-style housings, which have flat mounting bases and mounting holes for installation. They are commonly fitted with spherical roller bearings or self-aligning ball bearings. Spherical roller bearing arrangements are suitable for heavy loads, shock loads, and applications with misalignment, while self-aligning ball bearing arrangements are generally more suitable for lighter loads and higher speeds.

Common plummer block housing series include SN, SNK, SD, and other manufacturer-specific series. The size chart on this page mainly covers the SN, SNK, and SD series. With their split housing design, plummer block bearings can be installed and replaced without removing other components from the shaft, making installation and maintenance easier, especially for large shafts and difficult mounting positions.

Because of these features, plummer block bearings are widely used in industrial equipment. If you want to confirm the dimensions of your existing plummer block bearings or find suitable replacement options, you can check the plummer block bearing size chart below.

After confirming the required dimensions, you can contact BKZ Industry, a bearing manufacturer specializing in bearing units, to purchase plummer block bearings in bulk. With its own factory, BKZ Industry can provide stable production and competitive factory-direct prices.

Now, let’s check the plummer block bearing sizes. To find a specific size or series quickly, press “Command + F” on a Mac or “Ctrl + F” on Windows, and then enter the model, series, or size you want to locate.

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Part 1. Plummer Block Bearing Sizes

Also Read: Flange Bearing Size Chart for for Buyers and Engineers

Part 2. Do You Have an SNL Series?

You may wonder why the SNL series is not included in this plummer block bearing size chart. The SNL series is a split plummer block housing series developed and supplied by SKF. BKZ Industry does not supply genuine SKF-branded SNL housings because we are not an authorized SKF distributor.

However, BKZ Industry can provide plummer block housings with the same or similar mounting dimensions. You can send us the housing number, bearing number, shaft diameter, seal type, dimensions, and application requirements, and we will help you find a suitable alternative.

Part 3. Are SN and SNL Housings Interchangeable?

SN and SNL housings are not always directly interchangeable. Some corresponding models may have the same or similar shaft center height, mounting-hole distance, and boundary dimensions because they are designed according to common ISO dimensional standards.

However, you should still compare the housing bore, overall dimensions, mounting-hole size, bearing model, adapter sleeve, seals, locating rings, and end covers before replacement.

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Part 4. What Are Differences Between SN, SNK, SNL, and SD?

SN, SNK, SNL, and SD are different plummer block housing series designations.

SN Series: SN is a traditional split plummer block housing series commonly supplied by different manufacturers. It is generally used with self-aligning ball bearings or spherical roller bearings in standard industrial applications.

SNK Series: SNK is a split plummer block housing designation used by certain manufacturers.

SNL Series: SNL is an SKF-developed split plummer block housing series.

SD Series: SD housings are generally larger, heavy-duty split plummer block housings designed for large shafts, heavy loads, and demanding applications such as mining, quarrying, steel production, and heavy industrial equipment.

Final Words

With this plummer block bearing size chart, you can find the bearing model or dimensional information you need. If you need to purchase plummer block bearings, you should choose a trusted bearing manufacturer. BKZ Industry is one of the reliable options, offering a wide range of plummer block bearings for bulk orders.