NSK Self-Aligning Ball Bearings, Cylindrical Bore Bearings 1218 ,D=90
|Basic Load Ratings
DESIGN, TYPES, AND FEATURES
The outer ring of a self-aligning ball bearing has a spherical raceway and its center of curvature coincides with that of the bearing; therefore, the axis of the inner ring, balls and cage can deflect to some extent around the bearing center. This type is recommended when the alignment of the shaft and housing is difficult and when the shaft may bend. Since the contact angle is small, axial load capacity is low.
Pressed-steel cages are usually used.
Some self-aligning ball bearings have balls that protrude from the side face as shown below. This protrusion amount b1 is listed in the following table.
The permissible misalignment of self-aligning ball bearings is approximately 0.07 to 0.12 radian (4° to 7°) under normal loads. However, depending on the surrounding structure, such an angle may not be possible. Take care in the design of the bearing surroundings.
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 email@example.com 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 firstname.lastname@example.org
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.