TIMKEN M667944 | M667911D tapered roller bearing de doble hilera
- Brand
- TIMKEN
- Category
- Bearings
- Subcategory
- Tapered roller bearings
- Series
- TDO
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Description
TIMKEN M667944 | M667911D 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 M667944 | M667911D and any equivalents.
The TIMKEN TDO series is a double-row tapered roller bearing built as one matched unit, with the cones and the double cup supplied together. Because both rows work in a single assembly, it handles radial and axial forces in either direction and does so within a fairly compact envelope. That combination is why it turns up in gearboxes, machine tool spindles and mining equipment, where stiffness and accurate shaft location matter.
Reading the designation helps when you order. A TDO reference is really two codes: one for the cone and one for the cup. The leading M tells you the tapered roller series is metric, and the D on the cup means the cup is a double piece with two raceways machined into it. You can buy the complete assembly or the individual components, as long as the cone and cup pairing that defines the mounting is respected.
Typical service includes mill gearboxes, jaw crushers, presses, cranes and railway equipment, along with machine tool spindles and rolling mill rolls. In cement, steel and oilseed plants these bearings are chosen where the shaft has to stay well guided, with minimal deflection and repeatable positioning under combined loads.
Selection comes down to the radial and axial loads involved, the running speed and the space you have. During mounting, align the assembly and apply the preload the manufacturer specifies. Grease or oil both work as lubricants, and the sealing arrangement should match the environment, whether that means dust, water or elevated temperature. Compared with two separate bearings, the double cup makes axial adjustment simpler, but internal clearance still has to be checked once the bearing is in place.
TIMKEN tapered roller bearings interchange with other brands that carry the same standardized designations, though tolerances and capacities are not necessarily identical. For a quote, give the full cone and cup code, or the assembly number if you have it. If the exact reference is not on hand, send the part number or model through WhatsApp or email and the team will reply promptly, suggest equivalents and help you choose.
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 M…D designation mean in TIMKEN bearings?
- The M stands for a metric tapered roller series. The D on the cup shows it is a double cup with two raceways in one piece. A complete code pairs a cone with that double cup, depending on the reference.
- How do I choose between a TDO bearing and two single bearings?
- The TDO puts two rows into one assembly, which eases mounting and takes less axial space. Where higher load capacity or rigidity is needed, the TDO is generally the choice. Two single bearings can be enough for lighter loads or simpler arrangements.
- What lubricant is suitable for a double-row tapered bearing?
- It depends on speed and operating temperature. High-pressure lithium grease suits general applications; circulating oil is used at high speeds or temperatures. Follow the equipment manufacturer's recommendations and check the sealing to keep contamination out.