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 6203-2RS Ceramic Bearing Sealed Premium ABEC-5 P5 High Quality US $63.80 
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 6203DD Sealed Bearing 17x40x12 Ceramic Nylon Premium ABEC-5 US $110.20
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 MRC #87503/C3/ABEC-1 Roller Bearing Sealed & Shielded NEW!!! Free Shipping US $14.95
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 627DD Sealed Ball Bearing 7x22x7 Ceramic ABEC-5 Oil US $18.91
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 10 Sealed Ball Bearing R2DD 1/8"x 3/8"x 5/32" ABEC-5 US $56.91
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 6805DD Ceramic Si3N4 Sealed Ball Bearing 25x37x7 ABEC-3 US $47.41
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 6802DD Ceramic Sealed Bearing 15x24x5 ABEC-7 Stainless US $56.91
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 6803DD Sealed Bearing 17x26x5 Ceramic ABEC-7 Stainless US $72.20
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 6804DD Sealed Bearing 20x32x7 Ceramic ABEC-7 Stainless US $81.70
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 6805DD Sealed Bearing 25x37x7 Ceramic Premium ABEC-5 Stainless 25mm Bore US $91.20
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 S627DD Sealed Bearing 7x22x7 Ceramic Premium ABEC-5 Stainless Kit8045 7mm Bore US $37.91
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 698DD Sealed Ball Bearing 8x19x6 Si3N4 Ceramic ABEC-5 US $18.91
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 6701DD Sealed Ball Bearing 12x18x4 Si3N4 Ceramic ABEC-5 US $28.41
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 607DD Sealed Ball Bearing 7x19x6 Si3N4 Ceramic ABEC-5 US $28.41
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 6801DD Ceramic Sealed Ball Bearing 12x21x5 Si3N4 ABEC-5 US $28.41
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 6802DD Ceramic Sealed Ball Bearing 15x24x5 Si3N4 ABEC-5 US $28.41
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 6904DD Sealed Bearing 20x37x9 Ceramic Premium ABEC-5 C3 New Stainless Kit8041 US $81.61
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 6005DD Sealed Bearing 25x47x12 Ceramic Premium ABEC-5 Stainless Kit8045 US $113.91
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 6202DD Sealed Bearing 15x35x11 Ceramic Nylon ABEC-7 US $83.60
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 6204DD Sealed Bearing 20x47x14 Ceramic Nylon ABEC-7 US $129.20
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 6205DD Sealed Bearing 25x52x15 Ceramic Nylon ABEC-7 US $152.00
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 6206DD Sealed Bearing 30x62x16 Ceramic Nylon ABEC-7 US $247.00
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 6207DD Sealed Bearing 35x72x17 Ceramic Nylon ABEC-7 US $332.50
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 6801DD Sealed Bearing 12x21x5 Ceramic ABEC-7 Stainless US $66.50
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 (50) 6205-2RS premium EMQ seal bearings 25X52X15 ABEC3 US $87.99
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 O.S. Front Bearing OS FS70 8x22x7 Ceramic Sealed ABEC-7 US $14.95
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 Bearing 5x11x4 Ceramic ABEC-5 Bearings Pack (10) Sealed US $59.95
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 S6805-2RS Bearing 25x37x7 Hybrid Ceramic ABEC-3 Sealed US $24.95
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 6204-2RS Ceramic Bearing Sealed ABEC-7 P4 High Quality US $74.80
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 6205-2RS Ceramic Bearing Sealed ABEC-7 P4 High Quality US $88.00
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 6206-2RS Ceramic Bearing Sealed ABEC-7 P4 High Quality US $143.00
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 6207-2RS Ceramic Bearing Sealed ABEC-7 P4 High Quality US $192.50
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 6005-2RS Ceramic Bearing Sealed Premium ABEC-5 P5 High Quality Kit8045 US $65.95
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 6803-2RS Ceramic Bearing Sealed ABEC-7 P4 High Quality US $41.80
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 6801-2RS Ceramic Bearing Sealed ABEC-7 P4 High Quality US $38.50
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 6904-2RS Ceramic Bearing Sealed Premium ABEC-5 P5 High Quality Grease SRL New US $47.25
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 (50) 6004-2RS Premium EMQ seal bearing 25x52x15 ABEC3 US $67.99
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 (100) 6004-2RS Premium EMQ seal bearing 25x52x15 ABEC3 US $119.99
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 (1) 6007-2RS Premium EMQ seal bearing 35x62x14 mm ABEC3 US $5.80
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 (10) 6007-2RS Premium EMQ seal bearing 35x62x14 ABEC3 US $33.21
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 (50) 608-2RS premium seal bearing 608 RS bearings ABEC3 / C3 608 RS US $33.99
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 (100) 608-2RS premium seal bearing 608 RS bearings ABEC3 / C3 680 2RS US $55.99
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 (Qty 10) 1614-2RS Premium Bearings 3/8 x 1-1/8, ABEC 3, 1614 RS, Sealed Bearings US $25.47
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 6900 2RS sealed bearings ABEC7 10x22x6 rubber seal - 10 pieces US $4.95
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 (10) ABEC7 608-2RS seal bearing 608 rs bearings 8x22x7 mm US $7.59
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 (16) ABEC7 608-2RS seal bearing 608 rs bearings 8x22x7 mm miniature US $11.49
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 (50) 608-2RS seal bearing 608 rs bearings 8x22x7 mm ABEC7 top quality US $29.99
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 (50) 608-2RS BLUE seal bearing 608 rs bearings 8x22x7 mm ABEC5 top quality !!! US $29.99
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 (16) ABEC5 608-2RS blue seal bearing 608 rs bearings 8x22x7 mm miniature new!!!! US $11.49
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 (10) ABEC5 608-2RS seal bearing 608 rs bearings 8x22x7 mm Blue! new!! US $7.49
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 61902-2RS Bearing 15x28x7 Si3N4 Ceramic Stainless Steel Sealed ABEC-3 Ball Beari US $17.00
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 R6DD Sealed Bearing 3/8"x 7/8"x 9/32" Ceramic Premium ABEC-5 US $55.10
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 S61902 Ceramic Bearing 15x28x7 ZrO2 Stainless Steel Sealed ABEC-5 Ball Bearings US $17.00
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 SR8-2RS Ceramic Bearing Stainless Steel Sealed ABEC-5 1/2"x1 1/8"x5/16" inch Bal US $31.05
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 SR8-2RS ABEC-5 Sealed Bearing Si3N4 Ceramic Stainless Steel 1/2"x1 1/8"x5/16" in US $41.05
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 6901-2RS Sealed Bearing 12x24x6 ABEC-5 Ball Bearings US $12.00
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 SMR115-2RS Ceramic Stainless Steel Sealed ABEC-5 Bearing 5x11x4 Miniature Ball B US $22.00
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 SMR105-2RS Ceramic Stainless Steel Sealed ABEC-7 Bearing 5x10x4 Miniature Ball B US $32.00
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 SMR148-2RS Ceramic Stainless Steel Sealed ABEC-5 Bearing 8x14x4 Miniature Ball B US $22.00
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 SMR104-2RS Ceramic Stainless Steel Sealed ABEC-7 Bearing 4x10x4 Miniature Ball B US $32.00
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 SMR115-2RS Ceramic Stainless Steel Sealed Dry ABEC-7 Bearing 5x11x4 Miniature Ba US $32.00
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 SMR95-2RS Ceramic Stainless Steel Sealed ABEC-7 Bearing 5x9x3 Miniature Ball Bea US $32.00
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 S686-2RS Bearing 6x13x6 Si3N4 Ceramic Stainless Steel Sealed ABEC-5 Miniature Ba US $22.00
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 S625-2RS Ceramic Si3N4 Stainless Steel ABEC-5 Sealed Bearing 5x16x5 Miniature Ba US $22.00
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 (Qty of 1) R16-2RS sealed Premium ABEC3/C3 Grade bearing US $6.90
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 (Qty of 1) 1654-ZZ ABEC3/C3 Grade sealed bearing US $9.08
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 (Qty of 1) 1638-ZZ ABEC3/C3 Grade sealed bearing US $8.39
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 (Qty of 1) 1623-ZZ ABEC3/C3 Grade sealed bearing US $6.28
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 (Qty of 1) 1621-ZZ ABEC3/C3 Grade sealed bearing US $3.48
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 (Qty of 1) 1620-2RS ABEC3/C3 Grade sealed bearing US $5.96
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 (Qty of 10) 1616-2RS ABEC3/C3 Grade sealed bearing US $24.86
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 (Qty of 10) R6-2RS ABEC3/C3 Grade sealed bearing US $9.98
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 (Qty of 1) R10-2RS sealed ABEC3/C3 Grade bearing US $6.38
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 (Qty of 10) R4-2RS ABEC3/C3 Grade sealed bearing US $8.20
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 (Qty of 10) 623-2RS ABEC3/C3 Grade sealed bearing US $16.38
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 (Qty of 10) 627-2RS ABEC3/C3 Grade sealed bearing US $8.18
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 (Qty of 10) 628-2RS ABEC3/C3 Grade sealed bearing US $15.97
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 (1) 6010-2RS Premium EMQ seal bearing 50x80x16 mm ABEC3 US $10.99
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 Lot 10 Bearings R2-2RS 1/8"x 3/8"x 5/32" Sealed ABEC-5 US $29.95
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 Bike Bearings 6802 Ceramic Sealed Ball Bearing ABEC-7 US $33.00
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 Wholesale Lot 10 Bearings 5x11x4 Ceramic Sealed ABEC-5 US $59.95
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 10 Bearing 5x11x4 Hybrid Ceramic Sealed ABEC-5 VXB US $59.95
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 6903-2RS Bearing 17x30x7 Hybrid Ceramic ABEC-5 Sealed US $14.95
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 6802-2RS Bearing 15x24x5 Hybrid Ceramic ABEC-3 Sealed US $9.95
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 8 Skateboard Hybrid Ceramic Bearing Si3N4 ABEC-5 Sealed US $45.00
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 Skateboard Wheel / Bandsaw Bearings-Sealed-Heavy Duty-ABEC-1-36k RPM-Pre Greased US $1.25
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 6901-2RS Bearing 12x24x6 Hybrid Ceramic ABEC-5 Sealed US $12.95
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 (50) 6206-2RS Premium EMQ seal bearing 30x62x16 ABEC3/c3 bearings 6206 rs US $166.99
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 (1) 6208-2RS Premium EMQ seal bearing 40x80x18 ABEC3 US $9.88
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 (2) 6208-2RS Premium EMQ seal bearing 40x80x18 ABEC3 US $16.22
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 (4) 6208-2RS Premium EMQ seal bearing 40x80x18 ABEC3 US $27.99
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 6210-RS, 6210 2RS, Premium Bearing, 50x 90x20,ABEC/C3, 6210 RS Sealed Bearing US $19.57
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 (4)6800-2RS,61800 RS,Sealed Bearing,ABEC3,6800 RS US $7.15
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 (1) 6209-2RS Premium EMQ seal bearing 45x85x19 ABEC3 US $5.66
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 (10) 6209-2RS Premium EMQ seal bearing 45x85x19 ABEC3 US $69.99
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 (1) 6210-2RS Premium EMQ seal bearing 50x90x20 ABEC3 US $6.58
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 (10) 6210-2RS Premium EMQ seal bearing 50x90x20 ABEC3 US $68.99
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 (2) 6210-2RS Premium EMQ seal bearing 50x90x20 mm ABEC3 / C3 6210 bearings US $17.81
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 (10)1602-2RS Premium Bearings 1/4 x11/16,1602 RS,ABEC 3 Sealed Bearings US $18.79
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 10 Ceramic 5x11x4 ABEC-5 5mm/11mm/4mm Miniature Ball Sealed Radial Ball Bearings US $62.00
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Sealed Abec
Skateboard Bearings Ceramic vs. Steel by John Smith
Skateboard speed relies on many factors, the most important one is the RPM (revolution per minute) rate of the "Ball Bearings". The ball bearing consist of inner race, outer race, balls, balls retainer and optional closures.
As you may all know, any skateboard has 4 wheels (DUH), each wheel has 2 ball bearings, makes them all 8 Ball bearings, and they are (of course) sold as a set of 8 ball bearings. RPM of the ball bearings relies on reducing the friction between all the moving elements, here are the factors affecting the RPM:
1- Quality: The quality of any bearings are classified by the American Bearing Manufacturers Association ABMA as ABEC rating, the more the ABEC rating the more precise bearings were manufactured, or tighter in tolerance; in other words, the most common and good choice ABEC rating is ABEC-7.
2- Inner and outer race material: Carbon, chrome, zirconia and stainless steel are your options. For regular skate, I wouldn't choose anything but the Chrome Steel, well .. this is the widest used bearings steel. However, if you go to a race or a skate compition, you better sacrifice cash and go for the zirconia
3- Balls material: Again the bottom line is to reduce friction, your options are (sorted best to "not bad") silicon nitride ceramic, Zirconia ceramic and steel.
4- Retainer material: Your options are (sorted best to "not bad") zirconia, PTFE, bakelite, nylon, bronze and steel.
5- Lubrication: I suggest just any multi-purpose oil, since a skate-boarder can always take good care of his hardware, grease will make your wheels hard to free-spin
6- Closures: used to protect the moving parts of your ball bearings from outside contamination. If you are skate-boarding in a perfect environment (there is no such thing) with no dirt, no water and no humidity then you can always use your ball bearings without closures. Your options are (sorted best to "not bad") Teflon seals, metal shields, non-contact rubber seals, and contact rubber seals.
Confusing, Huh?, I am sure it is. Fortunately, any of the above selections should be good for regular skate-boarding, for professional skating go for the following good choice:
8 ABEC-7 Skateboard Bearings:Ceramic:Sealed:Nylon Cage
VXB Ball Bearings
Article Source: http://www.earticlesonline.com/Article/Skateboard-Bearings-Ceramic-vs--Steel/64408
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