29320M Spherical Roller Thrust Bearing Specifications and Selection Guide

The 29320M is a single-row spherical roller thrust bearing designed primarily to support heavy axial loads in one direction while accommodating limited misalignment. Commonly published boundary dimensions are a 100 mm bore, 170 mm outside diameter, and 42 mm total height. The “M” designation commonly indicates a machined brass cage, but suffix meanings and available configurations can vary by manufacturer, so confirm them against the supplier’s drawing and technical data before ordering.

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This guide explains what to check when evaluating a 29320M, how to match it to an application, and what information to provide when requesting a quotation. It is intended for industrial buyers, engineers, maintenance teams, and sourcing professionals comparing bearing options. For an automotive-related project, verify that the bearing’s load direction, speed, fit, and operating conditions suit the specific assembly rather than assuming interchangeability based on the part number alone.

Key Takeaways

• The common 29320M envelope is 100 mm × 170 mm × 42 mm; confirm the exact version and tolerances with the supplier.
• This bearing primarily handles axial load in one direction and can accommodate limited misalignment; it is not a general-purpose radial bearing.
• Selection requires more than matching dimensions: check loads, speed, lubrication, mounting, cage, and operating environment.
• Share the application details and required quantity with Tuoda Bearing to confirm suitability, availability, and quotation terms.

What Is a 29320M Spherical Roller Thrust Bearing?

A spherical roller thrust bearing uses barrel-shaped rollers arranged between a shaft washer and a housing washer. Its raceway geometry allows the bearing to support substantial axial force while accommodating a degree of shaft-to-housing misalignment. The bearing is intended mainly for axial loading in one direction, so the installation and load path should be reviewed before selection.

The 29320M designation identifies a size and design within a spherical roller thrust bearing series, but a designation alone does not provide every purchasing detail. Internal design, cage material, clearance, precision, lubrication provisions, and allowable operating conditions may differ among manufacturers or product variants. Ask for the complete specification and drawing for the offered item, particularly when replacing an existing bearing.

Typical Specifications to Confirm

These dimensions are useful for initial screening, not a substitute for a controlled drawing. Manufacturing tolerances and product details should be checked against the exact brand and specification being sourced. Do not rely on a listing title alone when the bearing is part of a critical assembly.

Application Matching: Where the 29320M May Fit

Spherical roller thrust bearings are considered in machinery where high axial forces and some misalignment are part of the operating conditions. Examples can include heavy industrial drives, vertical shafts, and other equipment with a thrust-bearing position, subject to the machine designer’s load and speed calculations. The actual fit depends on the full application, not simply on whether the equipment is described as automotive, industrial, or heavy-duty.

Because the bearing is primarily designed for axial loading, assess any radial load separately. Combined loading, shock, vibration, frequent starts, and changing load direction can affect service performance and may require a different arrangement or a paired bearing solution. If the thrust direction reverses, confirm whether the design needs a second bearing or another configuration to support axial force in both directions.

Questions for Application Review

• Is the principal load axial, and in which direction does it act?
• What are the maximum, normal, and fluctuating loads?
• What shaft speed, start-stop pattern, and operating temperature are expected?
• Is misalignment expected, and how much can the assembly tolerate?
• How will the bearing be lubricated, sealed, mounted, and inspected?

How to Select a 29320M

1. Confirm the Designation and Envelope

Start by comparing the bearing marking, drawing, and the three basic dimensions: 100 mm bore, 170 mm outside diameter, and 42 mm height are common references for this size. Check the shaft and housing fits, shoulder dimensions, retaining features, and installation clearances as well. If you are replacing a bearing, record the manufacturer, full suffix, and any visible cage or washer markings before removing it.

2. Check Loads, Speed, and Misalignment

Provide the supplier or application engineer with axial and radial loads, speed, load direction, duty cycle, and expected misalignment. Compare these conditions with the ratings and operating limits published for the exact bearing offered. If the available application data is incomplete, do not treat a nominal load rating as proof that the bearing will perform adequately in service.

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3. Select Cage, Lubrication, and Operating Conditions

The cage option should be suitable for the operating speed, lubrication method, temperature, and load conditions. A machined brass cage is a common interpretation of the “M” suffix, but buyers should confirm this with the manufacturer rather than assume all catalogs use identical coding. Specify the lubricant, relubrication interval where applicable, contamination controls, and any temperature or corrosion concerns.

4. Verify Fit, Mounting, and Maintenance

Confirm that the shaft washer and housing washer can be installed in the correct orientation and that the assembly provides adequate support. Review mounting procedures, fit recommendations, and lubrication instructions from the bearing supplier or equipment maker. A correct bearing can still be damaged by contamination, poor alignment, unsuitable fits, or incorrect installation practices.

Pricing, MOQ, and Lead-Time Considerations

The cost of a 29320M depends on factors such as brand, cage configuration, order quantity, packaging, and availability. Minimum order quantities and lead times are supplier- and stock-dependent, so they should be confirmed for the requested specification rather than assumed from a general product page. For planning, request both current availability and an estimated replenishment schedule if the bearing is needed for ongoing production or maintenance.

When comparing quotations, make sure each supplier is offering the same dimensions, cage, tolerances, and documentation. A lower unit price may not represent an equivalent product if the exact design or traceability requirements differ. Include the delivery destination, quantity, packaging needs, and any inspection or documentation requirements in the RFQ to reduce avoidable revisions.

Supplier Evaluation Checklist

A suitable supplier should be able to identify the offered product clearly and provide the technical information needed for engineering review. Ask for a drawing, product data sheet, marking details, and confirmation of the cage and dimensional configuration. For a replacement or regulated application, also state any traceability, inspection, or documentation needs before placing the order.

• Can the supplier confirm the exact 29320M dimensions and suffix interpretation?
• Are load ratings, speed guidance, and operating limits available for the offered version?
• Can the supplier clarify brand, origin, packaging, and product identification?
• Are stock status, MOQ, and delivery estimate confirmed in writing?
• Can the supplier support technical questions and discuss alternatives if the application data changes?

Common Selection Mistakes to Avoid

One frequent mistake is choosing by part number and dimensions alone without reviewing the load direction, speed, lubrication, or fit. Another is treating “M” as a universal guarantee of one cage design across every source. Buyers should also avoid assuming that a spherical roller thrust bearing can support any radial load or that it automatically accommodates unlimited misalignment.

For automotive-related use, do not assume the 29320M is a direct replacement for a wheel, transmission, or other vehicle bearing solely because the bore matches. Compare the original equipment specification, loading, speed, sealing, and installation arrangement first. Where the application is safety-critical or operating data is uncertain, obtain engineering confirmation before purchase.

Request a 29320M Quote from Tuoda Bearing

Tuoda Bearing supports B2B buyers evaluating spherical roller thrust bearings for maintenance, replacement, and equipment sourcing. To help us check the 29320M specification, include the required quantity, application, load and speed information, preferred brand or equivalent requirements, and delivery destination. If you have a drawing, existing bearing markings, or a product data sheet, share those details for a more accurate review.

In summary, the 29320M is a spherical roller thrust bearing commonly listed with a 100 mm bore, 170 mm outside diameter, and 42 mm height, and it is intended primarily for axial loading in one direction. Confirm the exact variant, cage, ratings, and application suitability before ordering. Contact Tuoda Bearing with your operating conditions and sourcing requirements to request a specification check, availability, and a quotation.