
SKF 129 TN9 self-aligning ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Self-aligning ball bearings
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Description
SKF 129 TN9 belongs to self-aligning ball bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 129 TN9 and any equivalents.
SKF self-aligning ball bearings in the TN series are double-row units with a spherical outer raceway that absorbs angular misalignment between shaft and housing. They suit equipment where perfect alignment is not achievable, such as transmissions, fans, and agricultural machinery. MR Industrial Accessories LLC supplies this line to customers across the United States and Latin America.
The part number combines a basic designation with suffixes that define internal details. For instance, 2304 TN9 is a self-aligning bearing from the 23 series, while 11204 TN9 belongs to the 112 series with its own dimensions. The TN9 suffix means the cage is made of glass fiber reinforced polyamide, appropriate for moderate temperatures. Other suffixes can indicate clearance or sealing, so always check the full code to confirm the configuration you need.
These bearings are found in equipment where shaft deflection or less rigid mounting occurs: conveyor belts, mixers, centrifugal pumps, industrial fans, and food machinery. In Latin America they are common in agro-industrial operations, processing plants, and maintenance workshops. The self-aligning feature helps reduce wear and extends service life under demanding conditions.
When selecting a bearing, consider radial and axial loads, rotation speed, and the environment. The TN series typically comes unsealed, so if dust or moisture is present, plan for external seals or choose a sealed variant. During assembly, ensure correct initial alignment and proper lubrication; the polyamide cage needs no special handling, but avoid impacts that could damage it.
For equivalences, SKF self-aligning ball bearings can be interchanged with other brands that follow the same standardized dimensions, such as FAG, NSK, or NTN. Always verify the complete code and tolerances, because small differences in internal clearance or cage type can affect performance.
To request a quote for an SKF self-aligning ball bearing from the TN series, send the exact code via WhatsApp or email. The MR team responds promptly and can suggest equivalents and help you choose the right option for your application.
Dimensions
Dimensions and tolerances: Message us the part number on WhatsApp and we'll verify its dimensions and version with the manufacturer's datasheet.
Frequently asked questions
- What does the suffix TN9 mean in an SKF bearing?
- TN9 indicates a polyamide cage reinforced with glass fiber, suitable for moderate temperatures and high speeds. It does not alter external dimensions or load capacity, but it affects heat dissipation and fatigue resistance.
- Does this bearing allow misalignment?
- Yes, self-aligning ball bearings compensate for angular misalignment between shaft and housing. This reduces stresses and extends service life in mountings where perfect alignment is not achieved, such as flexible shafts or separate housings.
- How do I request the correct code for a quote?
- Provide the complete code from the bearing or equipment manual. If you do not have it, share the measurements or send a photo and we will help identify it. MR quotes quickly via WhatsApp.

