NZ $14.50 +GST each
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This 6 x 13 x 5 mm (686-2RS Si3N4) bearing is a metric deep groove ball bearing. The 686-2RS Si3N4 inner diameter is 6 mm, the 686-2RS Si3N4 outer diameter is 13 mm, the 686-2RS Si3N4 width is 5 mm.
This bearing has non-contact metal shield on one side, and rubber seal on the other side to protect the bearing from dust or any possible contamination, which can extend bearing life, and retain the lubricant in the bearing.
The cage of this bearing is stainless steel, and the balls are made of Si3N4 Silicon Nitride ceramic. Tolerance of this bearing is rated at ABEC - 7. Silicon Nitride (Si3N4) ceramic bearings are 30% lighter than steel and 40% stronger. They have an incredible maximum spin rating of 300,000 rpm under load. These bearings are great for fishing reels and other applications that require fast spinning rate and resistant for rust and corrosion. Librication is generally not required with ceramic bearings.