TIMKEN HM858548D tapered roller bearing de doble hilera
- Brand
- TIMKEN
- Category
- Bearings
- Subcategory
- Tapered roller bearings
- Series
- TDI
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Description
TIMKEN HM858548D 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 HM858548D and any equivalents.
When a mounting has to carry radial and axial forces at the same time in both directions, a double row tapered roller bearing is often the answer. This TIMKEN assembly puts two rows of tapered rollers into one unit, which makes it rigid and able to handle combined loads. You will find it in gearboxes, transmission shafts and other industrial machinery.
Reading the part number helps you identify what you are looking at. The HM prefix points to a dimension family, the basic number covers the bore and width combination, and the D suffix tells you the bearing is double row rather than single row. Examples such as HM231116D, HM237542D and HM252311D all follow that pattern. Within the TIMKEN range, the TDO, TDI and TNA series differ in how the cones and cups are arranged.
These bearings show up in demanding sectors: metallurgy, cement, mining and heavy equipment manufacturing. They are common in speed reducers, rolling mill rolls, mill shafts and material handling systems. Because they take combined loads and moments, they suit mountings where alignment matters. Overhead cranes and power transmission drives that need rigidity also use them.
Selection comes down to the load case. Check the radial and axial loads, the rotation speed and the environment. If contamination is present, look for variants with integrated seals. Pick a lubricant that matches the working temperature, and make sure mounting is aligned precisely to avoid extra stress. Internal clearance is set according to the application, so follow the manufacturer's instructions for mounting and start-up.
Interchangeability needs care. Double row tapered roller bearings from different brands can vary in dimensions and capacity. Always confirm the bore, outside diameter and total width. The TIMKEN TDO series has equivalents in other brands, but no universal cross-reference exists. When you request a quote, give the complete part number or the exact dimensions so we can propose a compatible alternative.
If you need a double row tapered roller bearing, send the part number from your equipment or the mounting dimensions on WhatsApp. Our team will get back to you promptly with the right option for your application and technical support.
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 D suffix mean in the HM designation?
- The D indicates a double row bearing: two sets of tapered rollers on the same shaft. That lets it take radial and axial loads in both directions, unlike a single row bearing.
- How do I choose between the TDO, TDI and TNA series?
- It depends on the mounting arrangement and the load type. TDO is used where the cups are separate; TDI and TNA have their own configurations. To select, we need the dimensions and the application details.
- What data do I need to request a quote for a replacement?
- Send the complete part number shown on the bearing, or the bore, outside diameter and width. Working conditions such as load, speed and temperature also help. With that we will quote you on WhatsApp promptly.