EZO 693 ZZ 3x8x4 mm - Deep Groove Ball Bearing
EZO 693 ZZ is a miniature single-row deep groove ball bearing with dimensions 3x8x4 mm. It has a 3 mm bore diameter, 8 mm outside diameter and 4 mm width. The ZZ design uses metal shields on both sides of the bearing, helping to protect the internal components against contamination while retaining lubricant inside the bearing.
Technical data - EZO 693 ZZ
| Parameter |
Specification |
| Manufacturer |
EZO |
| Designation |
693 ZZ |
| Bearing type |
Deep groove ball bearing |
| Construction |
Single-row, miniature |
| d - bore diameter |
3 mm |
| D - outside diameter |
8 mm |
| B - width |
4 mm |
| Dimensions |
3x8x4 mm |
| Shields |
ZZ - metal shields on both sides |
What does EZO 693 ZZ mean?
The designation 693 ZZ identifies a miniature deep groove ball bearing with double metal shields.
693 identifies the bearing series and size.
ZZ indicates metal shields on both sides of the bearing.
EZO is a brand of miniature and precision bearings manufactured by Sapporo Precision in Japan.
The complete product identification is:
EZO 693 ZZ - 3x8x4 mm - miniature deep groove ball bearing with metal shields on both sides.
EZO 693 ZZ dimensions
The bearing dimensions are:
Complete dimensions:
3x8x4 mm
With an outside diameter of only 8 mm, the EZO 693 ZZ belongs to the miniature deep groove ball bearing category.
EZO 693 ZZ construction
EZO 693 ZZ is a single-row deep groove ball bearing.
Its basic construction consists of:
-
inner ring
-
outer ring
-
balls
-
cage
-
two metal shields
Deep groove ball bearings are primarily designed to accommodate radial loads and can also support axial loads in both directions within the operating limits of this bearing type.
What does ZZ mean in EZO 693 ZZ?
The suffix ZZ indicates that the bearing is equipped with metal shields on both sides.
The shields help reduce the ingress of contaminants into the bearing and help retain lubricant within the bearing.
Metal shields are different from contacting elastomer seals. They are not intended to provide complete sealing against liquids.
This distinction is important when selecting a miniature bearing for a specific operating environment.
EZO 693 ZZ vs open 693 bearing
The main difference is the protection of the bearing interior.
693 ZZ has metal shields on both sides.
An open 693 bearing does not have these shields.
Although both versions may have the same basic 3x8x4 mm dimensions, their construction and protection against contamination are different.
The ZZ suffix should therefore be considered when identifying or replacing the bearing.
EZO 693 ZZ vs rubber-sealed version
A ZZ bearing should not automatically be treated as equivalent to a rubber-sealed bearing of the same size.
Metal shields generally operate with very low additional friction because they do not function as contacting seals. Elastomer sealing systems provide a different level of protection and can affect friction and permissible operating speed.
The correct version should be selected according to the requirements of the application.
Selecting an EZO 693 ZZ bearing
Before ordering, verify:
-
complete designation 693 ZZ
-
manufacturer EZO
-
3 mm bore diameter
-
8 mm outside diameter
-
4 mm width
-
shield configuration
-
required bearing clearance
-
operating speed
-
load conditions
-
operating environment
-
requirements of the specific application
Identical 3x8x4 mm dimensions alone do not always confirm full technical interchangeability.
Alternative designations and search references
The product may also be searched as:
The terms ZZ and 2Z are commonly used in the bearing industry for versions with metal shields on both sides. However, the original manufacturer's designation should always be retained when identifying the exact product.
Installation
Because of its miniature dimensions, careful handling during installation is particularly important.
The bearing and mating surfaces should be clean before assembly. Installation force should never be transmitted through the balls.
When mounting the bearing onto a shaft, force should be applied to the inner ring. When pressing it into a housing, force should be applied to the outer ring.
Do not strike the bearing directly or deform the metal shields.
FAQ
What are the dimensions of EZO 693 ZZ?
EZO 693 ZZ has dimensions of 3x8x4 mm: 3 mm bore diameter, 8 mm outside diameter and 4 mm width.
What type of bearing is EZO 693 ZZ?
It is a miniature single-row deep groove ball bearing.
What does ZZ mean in EZO 693 ZZ?
ZZ indicates metal shields on both sides of the bearing.
Is EZO 693 ZZ rubber sealed?
No. The ZZ version uses metal shields rather than contacting rubber seals.
Is EZO 693 ZZ a miniature bearing?
Yes. With dimensions of 3x8x4 mm, it belongs to the miniature ball bearing category.
Is EZO 693 ZZ supplied lubricated?
Shielded miniature ball bearings are typically supplied with lubricant, but the exact lubricant specification should be confirmed for the specific EZO variant if it is critical to the application.
Can another 3x8x4 mm bearing replace EZO 693 ZZ?
Not automatically. In addition to dimensions, the shield configuration, internal clearance, precision, lubricant and operating requirements should be compared.
Are 693 ZZ and 693 2Z the same type?
Both designations are commonly associated with bearings having metal shields on both sides, but manufacturer-specific nomenclature should always be checked before assuming complete interchangeability.
EZO 693 ZZ - key information
EZO 693 ZZ is a miniature single-row deep groove ball bearing with dimensions 3x8x4 mm. It has a 3 mm bore, 8 mm outside diameter and 4 mm width. The ZZ configuration provides metal shields on both sides, helping protect the bearing interior against contamination while retaining lubricant.
Available from simmering.pl, a specialist supplier of bearings, seals and industrial components. Stock in Poland with worldwide shipping.
