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Roller Bearings

Page Thumb Roller Bearings ISC CompaniesRoller Bearings (Unmounted)

ISC Companies and affiliate Adams-ISC are distributors of mechanical power transmission parts including unmounted roller bearings. For more information about the brands we offer and/or pricing, please contact us by phone 763-559-0033, by email [email protected], or by filling out our online contact form.

Roller bearings have a large rolling surface area in contact with the inner and outer races and typically support heavier loads than comparably-sized ball bearings. A ball bearing’s contact type can be referred to as “point contact”, whereas a roller bearing has a “line contact”. Because of this line contact, the rollers are less likely to become deformed over time. Roller bearings carry heavy loads and can handle shock loads. They are more sensitive to misalignment because there is more surface area to manage the load, and maintaining even contact along the line can be difficult.

Types of Roller Bearings


This roller bearing has the highest combined radial load and speed capacity. A non-locating cylindrical bearing has a cylindrical shape that allows the inner ring to have axial movement relative to the outer ring. This is especially important when accommodating thermal expansion. Generally, a roller length that is equal to the roller diameter provides the best balance of load and speed capability.


Similar to cylindrical roller bearings but have a much smaller diameter-to-length ratio. They carry high radial loads in a minimal amount of radial space. Sometimes a hardened shaft acts as the needle bearing’s inner race. Cage-separated needle bearings have a retainer and accommodate higher speeds. Full complement style (drawn cup) needle bearings have elements in the outer ring that are up against one another and not separated with a retainer.


Usually contain one or two rows of barrel-shaped rollers within a spherical outer raceway. They support high radial or combined radial and thrust loads in both directions. Spherical bearings have internal, self-aligning capabilities. They can handle misalignment from 0.5 – 2 degrees without affecting rating or life.


Accommodate heavy radial loads, thrust loads, or combined loads. Parts include an inner ring, an outer ring, and tapered rollers that are spaced and contained in a cage. The race and roller angle determine the load capacity. Because they support thrust loads in one direction, they are usually used in sets facing opposite directions.

Cam-Type (Load Following)

These incorporate a shaft and head configuration and accommodate applications with symmetrical and elliptical rotation. Cam-type bearings are used when the shaft needs to follow a specific running alignment or support an extended load.

  • Stud/Threaded: has a threaded rod, stem, that screws into a threaded hole
  • Yoke/Shaft Mount: the roller head does not have a stub shaft extension

Top Brands We Offer

Bearings Limited Brand Logo

FAG_Schaeffler Brand Logo

General Bearing_SKF Brand Logo

IKO Brand Logo

INA_Schaeffler Brand Logo


KOYO Brand Logo

RBC Bearings Brand Logo

RBI Bearing Brand Logo

Schaeffler Brand Logo

Scheerer Bearing Brand Logo

SKF Brand Logo

ABC Smith Bearing Brand Logo

Timken Brand Logo

Torrington_Timken Brand Logo

PTDA-Handbook-CoverContent on this page was created using excerpts from the Power Transmission Handbook (5th Edition), which is written and sold by the Power Transmission Distributor’s Association (PTDA).

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ISC Companies and affiliate Adams-ISC are industrial distributors of bearings and mechanical power transmission parts. We have many different models and brands in stock for fast delivery. Our sales professionals are happy to assist you in the selection process to ensure the correct part is specified for your application. Get a quote by clicking below on “Request Pricing” and filling out the contact form or give us a call at 1-800-627-9434.

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