NSK Spherical Roller Bearings , Cylindrical Bore Bearings 21310EAE4C3,D=50
|Basic Load Ratings
DESIGN, TYPES, AND FEATURES
Various types of high load capacity spherical roller bearings are available. Types EA, C and CD have pressed-steel cages, and type CA has machined-brass cages. EA-type bearings listed here are classified as NSKHPSTM bearings, which offer particularly high load-carrying capacity, high limiting speeds, and superior performance under high-temperature operating conditions up to 200 °C.
An oil groove and holes are located in the outer ring to supply lubricant, and the bearing numbers are suffixed with E4.
To use bearings with oil grooves and holes, an oil groove should be located in the housing bore since depth for the groove in the bearing is limited. The dimensions of the oil groove and number of holes present are listed in Tables 1 and 2.
When bearings with a hole for a locking pin to prevent outer ring rotation are required, please contact NSK.
□Formulation of Bearing Designations
Spherical Roller Bearings
||239, 230, 240, 231, 241, 222, 232, 213, 223 : Spherical roller bearings
||Bore number indicates bore diameter. Bore number X 5 (mm)
||EA, CA : High load capacity
||M : Machined-brass cage (for CA Design)
Omitted: Pressed-steel cage (for EA Design)
||K : Tapered bore of inner ring (taper 1 : 12)
K30 : Tapered bore of inner ring (taper 1 : 30)
E4 : Lubricating groove in outside surface and holes in outer ring
||Omitted : CN clearance, C3 : Clearance greater than CN,
C4 : Clearance greater than C3, C5 : Clearance greater than C4
||Omitted : ISO Normal, P6 : ISO Class 6, P5 : ISO Class 5, P4 : ISO Class 4
||S11 ; Dimensional stabilizing treatment: working temperature under 200 °C
(omitted for EA design)
||*H* : NSKHPSTM designation
Tolerance Class : ISO Normal
We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.
To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase.
To start a return, you can contact us at email@example.com. If your return is accepted, we’ll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.
You can always contact us for any return question at firstname.lastname@example.org.
Damages and issues
Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right.
Exceptions / non-returnable items
Certain types of items cannot be returned, like perishable goods (such as food, flowers, or plants), custom products (such as special orders or personalized items), and personal care goods (such as beauty products). We also do not accept returns for hazardous materials, flammable liquids, or gases. Please get in touch if you have questions or concerns about your specific item.
Unfortunately, we cannot accept returns on sale items or gift cards.
The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.