The Timken Company (, a world leader in engineered bearings and power transmission products, is expanding its popular line of mounted bearings with spherical roller bearing solid-block housed units that allow for even easier installation and removal for a multitude of applications.

“Timken spherical roller bearing solid-block housed units with double-nut adapters are designed for tough conditions without being hard to use,” said Cory Shaw, Timken general manager - housed unit bearings. “Not only are our mounted units stronger on the outside, but they are also smarter on the inside. We design our units to provide high performance, real world maintenance solutions in a wide range of sizes and styles.”

A Large Selection of Large Bore Options
Timken spherical roller bearing solid-block housed units now come in sizes up to 15 inches (380 mm), including the new TAA Series units, with added conveniences for customers. Inside each TAA Series unit is a double-nut, tapered adapter sleeve that simplifies bearing replacements in challenging environments.

Timken modified its standard adapter sleeve (with front lock nut) to include a mechanical withdrawal nut on the back end that is factory set for nominal shaft sizes and, if necessary, can be easily adjusted in the field to accommodate actual (under/over) shaft size.

The front locking nut is tightened until the back nut stops against the face of the inner ring, indicating that proper bearing clearance and mounting force has been achieved. This eliminates the need for difficult and often inaccurate in-process measurements of radial internal clearance, helping MRO pros reduce time on the job and improve consistency. (Note: the adapter sleeve can also accept hydraulic nuts.)

For quick dismounting, the front nut is loosened so the back nut can be tightened to unseat the sleeve from the tapered bearing bore, assisting in bearing removal.

Fully Packed with Features
All TAA Series housed units use a Timken double-row spherical roller bearing to deliver outstanding performance in many types of applications including mining, steel processing, bulk handling, power generation, forest products cement and more. No matter where they’re found, these mounted bearings provide time- and cost-saving advantages to customers including:

  • Loading capacity does not change regardless of housing orientation
  • Ability to handle up to 1.5 degrees of misalignment
  • Rigid one-piece, cast-steel housing withstands  shock loads and the impact of falling debris
  • Contact and non-contact primary seal options for enhanced protection
  • Optional secondary sealing covers available for all standard units.
  • Easy in-field conversion from fixed to floating with one rotation of the retaining nut

In addition, each unit is assembled-to-order, so no matter what seal combination is required, Timken can typically ship it from the factory in a matter of days to keep projects moving and plants running.

It takes superior products and people to reduce friction in industrial operations and Timken delivers both with a full portfolio of housed units backed by unrivaled heavy-duty industry experience. Visit to boost your knowledge of mounted bearings and browse one of the biggest inventories available.