NSK Spherical Roller Bearings , Cylindrical Bore Bearings 21308EAE4 ,D=40
|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
|①Bearing Series||239, 230, 240, 231, 241, 222, 232, 213, 223 : Spherical roller bearings|
|②Bore number||Bore number indicates bore diameter. Bore number X 5 (mm)|
|③Internal design||EA, CA : High load capacity|
|④Cage||M : Machined-brass cage (for CA Design)
Omitted: Pressed-steel cage (for EA Design)
|⑤⑥Ring 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
|⑦Internal clearance||Omitted : CN clearance, C3 : Clearance greater than CN,
C4 : Clearance greater than C3, C5 : Clearance greater than C4
|⑧Tolerance class||Omitted : ISO Normal, P6 : ISO Class 6, P5 : ISO Class 5, P4 : ISO Class 4|
|⑨Special specification||S11 ; Dimensional stabilizing treatment: working temperature under 200 °C
(omitted for EA design)
|⑩NSKHPSTM||*H* : NSKHPSTM designation
Tolerance Class : ISO Normal
We have a 30-day return policy. Returns are limited to items purchased within 30 days and are subject to a 25% restocking fee.
Items must be unworn, unused, with tags and in original packaging to be eligible for return. A receipt or proof of purchase is also required.
To initiate a return, please contact firstname.lastname@example.org If your item is eligible for a return, you will be credited 75% of the original purchase price, not including any shipping costs. Please contact your sales professional to request an RMA (Return Materials Request) as only returns bearing an RMA will be received. All items must be in new saleable condition in the original packaging. Credits will be issued once the item has been received and inspected.
If you have any questions regarding returns or exchanges, please contact email@example.com
damage and problems
Please inspect your order upon receipt and if the item is defective or damaged, or if you have received the wrong item, please contact us immediately so that we can evaluate the problem and deal with it properly.
Unfortunately we do not accept returns on non-policy items, discount items or gift cards.
The fastest way to get the item you want is to return the item you have and purchase a new item separately once the return has been accepted.
After we receive and inspect your return, we will notify you and let you know if a refund has been approved. If approved, your original payment method will be automatically refunded. Remember, it may take a while for your bank or credit card company to process and post your refund.