This 693ZZ deep groove ball bearing offers high quality, high speed, low noise, and protect the ball from dust by the shield. Specifications: Inner Diameter: 3 mm; Outer Diameter: 8 mm; Thickness: 4 mm. Feathers: 1, Closed with metal shields to protect the bearing from dust or any possible contamination. 2, Widely used in: Roller skates, Skateboarding, Twisting cars, Running shoes, In-line wheels, Double row wheels, MTB, SUV and other Extreme sports equipment. 3, Fit for skateboards, inline skates, roller skates, scooters, and other skating applications, also available for 3D printer wheel bearings, CNC, cooling fan etc. 4, Also used in industrial engineering, such as Machinery, Power Transmission, Instrumentation, Household appliances, Internal combustion engines, Transport vehicles, Agricultural machinery, Construction machinery. Package Content : 10 x 693ZZ Deep Groove Ball Bearing
J**N
Thinking They Might Work.
Seemed lower quality than the ones I am replacing. Using in a telescope focuser so won’t be moving fast. First one wouldn’t turn well so tossed it. 2nd one rotated fine. Seems to work. Tolerances seem good enough. Glad there are 10 hoping half work. Not much quality control in these Chinese products.
B**E
Tolerences
The ID tolerances on these are pretty loose; the closest one to listed spec was 3.08mm, the worst 3.12mm, with most being 3.10mmThe OD's are pretty close.
Z**I
Poorly made
Very loose tolerance, will rattle badly under a few thousand RPM
B**A
Way out of tolerance
These bearings were a huge disappointment. The inside bore is anywhere between 3.14mm - 3.17mm making them useless for my application where I have precision ground 3mm shafts. In addition there is no pre-load in the bearings the the inner race has a fair amount of slop. These may be useful if you have a 1/8" shaft but definitely not with 3mm shafts.
S**N
Amazing little bearings
Exactly what I needed for my fpv tinytank build
Trustpilot
1 month ago
1 day ago
