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SS693-ZZ Stainless Steel Miniature Ball Bearing 3x8x4 Shielded SMR693ZZ

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SS693-ZZ Stainless Steel Miniature Ball Bearing 

Key Features

SS693-ZZ is a Precision StainlessSteel Miniature Ball Bearing manufactured to have both sides metal shielded and is pre-lubricated with grease allowing it to be ready for use upon delivery. Our 600 Series Bearings have a larger OD which can assist in high speed applications as well as large load capacity applications.

Match Numbers / Interchange Numbers

SMR693-ZZ, S693Z, SS693.2Z, SS693ZZ, S693ZZ, DDR-830ZZ, SSR830ZZ

Applications / Industries

SS693-ZZ StainlessSteel Miniature Ball Bearings are used in a range of applications from Aerospace industry to Pharmaceutical industry, Biotech, Food processing, Fishing Reels, Chemical processing, Marine, Military, Defense, Automotive industries and much more.

What are Ball Bearings?

A ball bearing is a type of rolling-element bearing that uses roller balls to separate two “races,” or bearing rings. The combination of the roller balls and bearing rings help to reduce surface contact and rotational friction across moving planes to accommodate axial loads.

Ball bearings help to facilitate motion by distributing loads and reducing friction for applications that have a high-speed requirement, ultimately aiding in extending the working life of your equipment.

What are Rolling-Element Bearings?

Rolling-element bearings, commonly called rolling bearings, are bearings that carry a load by utilizing “rolling elements” between two concentric, grooved rings called races. The motion of the bearing races allows for the rolling elements to move with very little resistance and with little slide variance.

Some common types of rolling elements include ball, cylindrical, spherical, barrel, needle, spindle, or tapered.

What is the Difference Between Open, Shielded, and Sealed Rolling Bearings? 

The main difference between open and sealed/ shielded bearings is the application of lubrication. The main difference between sealed and shielded bearings is the presence of a protective enclosure.

  • Sealed and shielded bearings are both lubricated with oil or grease in the bearing factory. However, a rubber sealed bearing protects the bearing by using a seal that contacts the inner and outer race. This provides superior protection at the cost of operating speed and temperature.
  • Open bearings are meant to be lubricated in place, with periodic reapplication of lubrication, based on use.
  • Shielded rolling bearings contain an enclosure that helps to protect the working parts of the bearing from environmental debris that may be introduced and would otherwise reduce the ball bearing speed and lifespan. This metal shield is stamped onto the bearing and only contacts the outer ring, this allows for protection without sacrificing operating speed or temperature.
Online Catalog:
Dimensions & Material
Inner Diameter:
Outer Diameter:
Chevron SRI-2 Grease
Stainless Steel AISI-440C
ID: 3mm x OD: 8mm x W: 4mm
Product Details
Closure Type:
Stainless Steel Shielded ZZ
Speed Limit:
Grease: 60,000 RPM | Oil: 67,000 RPM
Basic Load Ratings:
Static (Cor) : 40 lbf | Dynamic (Cr) : 126 lbf
Interchange Numbers:
SMR693-ZZ, S693Z, SS693.2Z, SS693ZZ, S693ZZ, DDR830ZZ, SSR830ZZ
SS693-ZZ Stainless Steel Miniature Ball Bearing 3x8x4 Shielded SMR693ZZ

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