NSK Deep Groove Ball Bearings 6918ZZ ,Single-Row D=90
|Bearing Numbers||Boundary Dimensions
|Basic Load Ratings
DESIGN, TYPES, AND FEATURES
SINGLE-ROW DEEP GROOVE BALL BEARINGS
Single-row deep groove ball bearings are classified into the types shown below.
The proper amount of good quality grease is packed in shielded and sealed ball bearings. A comparison of the features of each type is shown in Table 1.
Table 1 Features of Sealed Ball Bearings
|Rubber Non-Contact Seal
|Rubber Contact Seal
|Torque||Low||Low||Higher than ZZ and VV types
due to contact seal
|Speed capability||Good||Good||Limited by contact seals|
|Grease-sealing effectiveness||Good||Better than ZZ type||Slightly better than VV type|
|Dust resistance||Good||Better than ZZ type (usable in moderately dusty environments)||Best (usable even in very dusty environments)|
|Water resistance||Not suitable||Not suitable||Good (usable even if fluid is splashed on bearing)|
|Operating temperature||–10 to +110 °C||–10 to +110 °C||–10 to +110 °C|
Note (1) The above temperature range applies to standard bearings. By using cold- or heat-resistant grease or changing the type of rubber, the operating temperature range can be extended.
□Formulation of Bearing Designations
Single-row deep groove ball bearings
|①Bearing type||6 : Single-row deep groove ball bearings|
|②Dimension Series||2 : 02 Series, 3 : 03 Series, 9 : 19 Series, 0 : 10 Series|
|③Bore number||Less than 03, Bearing bore 00 : 10mm, 01 : 12mm, 02 : 15mm, 03 : 17mm
Over 04, Bearing bore bore number X 5 (mm)
|④Seals/shields||ZZ : Shield on both sides, DDU: Rubber contact seal on both sides, VV: Rubber non-contact seal on both sides, Z: Shield on one side, DU: Rubber contact seal on one side V:Rubber non-contact seal on one side|
|⑤Internal clearance||Omitted : CN clearance＊1, C3 : Clearance greater than CN, C4 : Clearance greater than C3, CM : For electric motors＊1|
|⑥NSKHPS designation||& : NSKHPSTM Bearings|
|⑦Grease designation＊2||NS7 : NS HI-LUBE|
＊1 CM clearance may be used instead of CN clearance (the reverse is not possible).
＊2 The grease designation is required when seals/shields are used on both sides.
NSKHPS™ Deep Groove Ball Bearings
Note (1) The above temperature range applies to standard bearings. By using
cold- or heat-resistant grease or changing the type of rubber, the operating temperature range can be extended.
Compared with conventional bearings:
● Improved reliability
Bearing life is 15% longer than conventional bearings thanks to optimization of the bearing’s internal design and improvement of processing technology. As a result, NSKHPS™ bearings contribute to reducing maintenance costs and facilitate the downscaling of related equipment.
● New product lineup
The standard dimensions are identical to standard size bearings. NSK has expanded the lineup of NSKHPS™ bearings by focusing on a wide range of sizes offering a high degree of versatility for various general-purpose applications.
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.