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Sure, you could always add the old WD-40 to your 608 bearings to get them go spin smoother and faster, but why waste money on the oil when you can actually make a noticeable change in your bearings? The tools that you shall need are a shielded 608 bearing (I got mine from https://www.amazon.com/Bearing-Shielded-Greased-Miniature-Bearings/dp/B002BBD6X4/ref=sr_1_3?ie=UTF8&qid=1487218581&sr=8-3&keywords=608+bearing), and a small flathead screwdriver (It should be about the size in the picture). Also, your bearings shall look much more cool afterwards. I used this on my fidget spinner that I got from Thingiverse (credit to LoveWaffle for the design): http://www.thingiverse.com/thing:1915419

There is a guaranteed mega boost in performance after you do this simple hack. In the end, they spun just as fast if not faster than a ceramic 608 bearing.

Step 1: Pry Off the Metal Shield

Stick your screwdriver between the shielding and the center ring. Make sure that the screwdriver goes in, but be careful not to damage the bearings inside. Carefully pry the rest of the shield off of one side. Repeat on the other side, and you should have a 608 bearing with the covers off (doesn't it look much cooler?), and two rather bent covers.

Step 2: Wash and Spin

I recommend washing the bearing out before using it so that you can get dust and grease out of it. You may oil it now, but I prefer just to leave it with no oil because it is just too messy. I was blown away by the performance of it compared to the same bearing with the shields on.

<p>Ironically, the freer wheeling that comes with this is a sign that a machine tool's motor bearings need replacement. Some designs rely on the internal friction of the lubrication to slow rotation down when stopping, when a tool spins for too long after power- down, it's time to replace. ☺</p>
<p>Thank you for telling me that! I shall keep that in mind for the future.</p>
<p>The world of lubrication is a funny science, you'd think more would be better, but it can actually impede speed. When the famous &quot;rocket sled&quot; was first used, it was found that conventional petroleum lubrication used on the track rails actually formed a standing wave in front of the wheels at supersonic speed because of the heat generated, effectively braking the vehicle. Ordinary talc, a mineral, was subsequently found to be the best product to use as it stayed put and remained lubricious and let the sled glide over it.</p>
<p>I wash them out with kero. Then hold the hose sideways on them and direct a strong stream to get them moving . They spin like crazy . Dry and oil lightly using sewing machine oil The seals keep the grease in and the dirt out so if its serious forget it.</p>
<p>This DOES offer a speed advantage in the short term. &quot;Back in the day&quot; I, and every other skater I know of did this. The advantage is short lived. Without the covers and oil/grease/speed cream - the bearings degrade quickly and must be replaced. :( However, if you do it right before racing to the bottom of your city's biggest hill - its a point in your favor!</p>
<p>I did not know that the bearings would wear out faster, but I only used them for a fidget spinner. Thanks for the information!</p>

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Bio: My favorite pastime is 3D printing, and I have a homebuilt Rep-Rap Kossel.
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