18.5x26x4 Bearing Ceramic Si3N4:Stainless:Shielded
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Ball Bearing Ceramic Balls (Si3N4) (Silicon Nitride) 18.5x26x4 mm Shielded Bearings

18.5mmx26mmx4mm Double Metal Shielded, radial, deep groove ball bearings, bearings are made of Stainless Steel with Ceramic Balls (Si3N4), bearing are closed with 2 Metal Shields, one Shield from each side to protect the bearing from dust or any possible contamination, bearings are sealed and self lubricated, inner diameter is 18.5mm, the outer diameter is 26mm and the width is 4mm. Most common application is the Align RC helicopter engine. Dimensions: 18.5*26*4 mm/Metric ID (inner diameter)/Bore=18.5mm OD (outer diameter)=26mm Width/Height/thickness=4mm Name: ball bearing Item: Double Metal Shields Ball Bearings Size: 18.5mm x 26mm x 4mm Ball Bearings Inner Diameter (ID): 18.5mm Outer Diameter (OD): 26mm Width/Height/Bridth (W/H/B): 4mm Dimensions: 18.5*26*4 mm/Metric ID (inner diameter)/Bore=18.5mm OD (outer diameter)=26mm Width/Height/thickness=4mm Type: Deep groove radial ball bearings Material: Stainless Steel Balls: Ceramic Si3N4 Closures: Double Metal Shields Quantity: One Bearing

Ball Bearings

Ball Bearings main function is to minimize the friction caused by any relative movement of two or more objects, in order to reach the maximum efficiency of energy usage, we aim to minimize the "converted to heat" energy by using Ball Bearings.
A great variety of Ball Bearings types and Ball Bearings designs are known, the manifolds of the ball bearings is justified by their various purpose of the ball bearings needed application, each type of ball bearings has a certain characteristic technical properties, rolling ball bearings have the following advantages compared with the plain bearings:

• Low starting moment.
• Low friction at all speeds.
• Low energy consumption.
• High reliability.
• Small width.
• Low consumption of lubricant.
• Long relubrication intervals.
• Easy to mount and dismount.
• Standardized dimensions.