TIMKEN NA691A tapered roller bearing de doble hilera
- Brand
- TIMKEN
- Category
- Bearings
- Subcategory
- Tapered roller bearings
- Series
- TNA
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Description
TIMKEN NA691A belongs to tapered roller bearing de doble hilera, 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 NA691A and any equivalents.
The TIMKEN TNA series is a double-row tapered roller bearing assembly. Two rows of tapered rollers run in one unit, so the bearing takes radial and axial loads in both directions. You will find it in gearboxes, final drives and mining equipment, where stiffness and load capacity matter.
Reading the code helps when you order or cross-reference. The series starts with the NA prefix, followed by a three-digit number and the letter A at the end. That string sets the size and internal construction of the assembly. Because variants exist, send the complete part number and our team will confirm the exact version you need.
These bearings suit arrangements with demanding combined loads: industrial gearboxes, speed reducers, material handling equipment, and machinery in the cement and mining industries. In crushing plants, mills and conveyors, the double-row layout carries radial and axial forces in both directions, which can simplify the support design and stabilize the rotating assembly.
Selection starts with the radial and axial loads, the rotation speed and the environment. TNA series bearings are commonly mounted with an interference fit on the shaft and in the housing, depending on the load type. Check alignment between shaft and support, and pick a grease or oil with the viscosity and additives the application calls for. Sealing and extra protection depend on how much contamination is present.
On replacements, double-row tapered roller bearings carry specific designations and are not always interchangeable across brands without checking dimensions and tolerances. TIMKEN uses its own nomenclature for this series, and other makers may list similar parts under different codes. Compare the main dimensions and operating conditions before you decide; we can help you find a compatible alternative.
If you have the part number, send it by WhatsApp or email and we will quote it promptly. MR Industrial Accessories LLC supplies the TIMKEN line and can advise on application, mounting and lubrication. We serve customers across the United States and in several Latin American countries, and we can suggest equivalents when needed.
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 NA…A designation mean in TIMKEN bearings?
- The TNA series uses the NA prefix, a three-digit number and a final A. That combination defines the size and features of the double-row bearing. Send us the complete part number and we will help you identify the specific reference.
- Where are double-row tapered roller bearings used?
- They are used where radial and axial loads are significant, such as gearboxes, final drives, and mining, cement and material handling equipment. The double row provides rigidity and load capacity in both directions, making it suitable for heavy machinery.
- How do I request a quote for a TIMKEN TNA series bearing?
- Write to us on WhatsApp or email with the part number you need. We will quote it promptly and, if necessary, advise on the application and mounting. We can also indicate a compatible alternative if you are looking for another variant.