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SKF 31309 J2/QCL7CDF is a 45mm bore single row metric tapered roller bearing. It features a pressed steel cage (J2) and optimized contact geometry (QCL7CDF). Designed for combined radial and axial loads in gearboxes, pinion shafts, and conveyor drives.
MODEL 31309 J2/QCL7CDF
$164.66 Each
Prices are subject to change
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Typically Ships in: 1 day
Returnable:No
Basic Dynamic Load Ratings C
40500 lbf
Basic Static Load Ratings C0
45900 lbf
Item #
31309 J2/QCL7CDF
Item Name
Single Row, Paired Face-To-Face Tapered Roller Bearings
Principal Dimension d
1.7717 in
Principal Dimension D
3.937 in
Principal Dimension T
2.1457 in
Speed Ratings - Limiting
6700 rpm
Speed Ratings - Reference
4000 rpm
General Description
| The factors that influence SKF bearing performance and service life include but are not limited to the following : Roller end/flange contact area The geometry and surface finish of the roller ends and the area on the flange that makes contact with the roller ends, have been optimized to promote and maintain the formation of a lubricant film. This reduces friction and heat generated by the bearing as well as flange wear. The bearings can better maintain preload and run at reduced noise levels. Raceways profiles To increase service life under misalignment or heavy load conditions, SKF tapered roller bearings have either crowned raceways or a logarithmic profile to prevent stress peaks at the roller ends. The logarithmic profile is designed to optimize load distribution along the rollers. Consistency of profiles and roller size The rollers used in SKF tapered roller bearings are made to such close tolerances that they are virtually identical. These extremely close tolerances, together with the precision of the raceway profiles, provide optimal load distribution over the rollers, to reduce noise and vibration levels and enable preload to be set more accurately. Running-in Tapered roller bearings typically have a running- in period. During the running-in period, a conventional design tapered roller bearing experiences a significant amount of friction, resulting in wear, which can be noticed as a temperature spike. With current SKF tapered roller bearing designs, friction, wear and frictional heat are significantly reduced, provided the bearings are mounted and lubricated correctly. |
Note
| SKF Explorer bearing. |
SKU: 315294
Bearing
Old hard to find bearing for a 85 year old tractor. Fit perfect and price was great.
Read moreSKU: 320006
Bearing purchase
Good price and fast delivery!! Also a pleasure doing business with MROSupply.com!!
Read moreSKU: 2069041
Purchase of bearing
exactly what we needed and it showed up in only 1 day thank you so much.
Read moreHow do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
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SKU: 315294
Bearing
Old hard to find bearing for a 85 year old tractor. Fit perfect and price was great.
Read moreSKU: 320006
Bearing purchase
Good price and fast delivery!! Also a pleasure doing business with MROSupply.com!!
Read moreSKU: 2069041
Purchase of bearing
exactly what we needed and it showed up in only 1 day thank you so much.
Read moreDisclaimer: The return policy information shown below is merely an excerpt from SKF's General Conditions of Sale.
RETURN OF GOODS FOR CREDIT
Goods will not be accepted for return without prior written approval from SKF. The return freight must be prepaid by the Buyer. Unless return of Goods is due to Supplier error, Goods returned will be subject to a credit service fee of $25.00 or 15% of the credit value, whichever is greater. An additional service fee may apply is further inspection is required at the discretion of SKF