Yrt Rotary Bearing, Crossed Roller Bearing, Shg Bearing, Csg Bearing, RV Bearing, Zarn Bearing, Zarf Bearing, Slewing Bearing

“Fastest” in skateboard speak is “Lowest torque” in bearing speak. “Fastest” in bearing speak is the bearing that has the highest RPM before failure. The difference between an ABEC1 bearing and an ABEC9 bearing is ONLY the tolerances to which it is made. An ABEC1 bearing is not made to as close a tolerance as an ABEC9 one. The differences between them are measured in microns or thousandths of a millimetre. The bore (the hole in the middle) of a skateboard bearing is 8mm. For an ABEC1 bearing the tolerance band on the bore size would be between 7.9920mm and 8mm. For an ABEC9 bearing the tolerance band on the bore size would be between 7.9975mm and 8mm. This is a difference of 5.5 microns. The human eye can only see things bigger that about 45 microns (roughly half the thickness of a human hair). That’s 8 times bigger than the differences between the two bearings! One good 5 set ollie will probably change the shape of your bearings by more than that. The reason an ABEC9 bearing feels faster is that they are usually filled with oil and not grease, i.e. nothing to do with the precision of the bearing. The following table illustrates maximum revolutions per minute (RPM) with increasing tolerance (ABEC number). 608 (the primary bearing size used in skate boards)Max rpm in greaseMax rpm oil Max RPM 608-ZZ ABEC1 (1.0)3400040000 Max RPM 608-ZZ ABEC3 (1.1)3740044000 Max RPM 608-ZZ ABEC5 (1.2)4080048000 Max RPM 608-ZZ ABEC7 (1.4)4760056000 Taking this a little further..... An ABEC 1 has maximum RPM before failure if lubricated with grease of 34,000 RPM - grease being the slowest rating due to heat build up and churning drag. Assuming the worst possible case of wheel outside diameter of 40 mm. 1 revolution = 40x3.14 = 125mm of travel (roughly) Therefore a wheel travels in 1 hour 34000x60x125 = 255,000,000mm This is 255 km/h or roughly 160mph!!!! An ABEC 7 can allow for 56000 rpm – they are usually sold oiled not greased Assuming the worst possible case of 40mm diameter wheels. 1 revolution = 40x3.14 = 125mm of travel (roughly) Therefore wheel travels in 1 hour 56000x60x125 = 420,000,000mm This is 420 km/h or roughly 260mph!!!! Wheels normally overheat and fail at about 100mph due to bubbles in the urethane bursting due to heat build up. Finally the high accuracy of a component is only of use if the surrounding parts are of a similar accuracy. All skateboard trucks and wheels are made to NO WHERE NEAR the standards of the bearings so fitting high ABEC bearings in a skateboard is akin to fitting Formula 1 wheel bearings to a tractor hub. Although the above may not be popular to many who sell high ABEC rated bearings at highly inflated prices, it is designed to dispel many myths and false selling when it comes to your skateboard bearings. So now you know..... In normal skateboard conditions there will be no difference between skate bearings of differing ABEC ratings when set up identically. The differences that you can feel occur due to method of sealing and type of lubrication. The only other major difference that exists is in the quality of the materials used to make the bearing but this cannot be measured without dismantling a sample bearing and putting it through some pretty expensive tests. For further information on skates vist our skateboard links page.

Luoyang Hongyuan Bearing Technology Co., Ltd. was established in December 2005, located in the Luoyang Airport Industrial Cluster, with more than 300 employees. With the development of precision bearings as the development direction, the company specializes in the research and development and manufacture of three series of precision rotary table bearings, cross roller bearings and robot reducer bearings. The precision grades are P2, P4 and P5, and the size range is 20mm ~2000mm.

YRTS series high-speed Axial/radial bearings (referred to as YRTS rotary bearings) series are the same as the YRT series, but the internal structure is different from the YRT series. The turntable bearing series is low and uniform. Therefore, for the occasions that require relatively low friction but relatively high speed, this series can be used, such as bearings for shafts driven by direct drive motors.

Contact us now and let us show you exactly what we can do for you.© ARN Trading Ltd t/a AHR International 2010 All rights reserved

1.Products AdvantagesProduct quality is fundamental for the surival of HONB.HONB bearing possesses the characteristics of high precision, high reliability and long life. 2.Fast DeliveryFrom ID size 20~300mm, we have enough stocks of parts.The lead time is within 7 days. 3.Personalized CustomizationAccept customized products, accept OEM / ODM. 4.Pre-sale and after-sale servicePre-sales technical support, after-sales technical guidance communication, 24 hours online. 5.Quality WarrantyWe have a QC team to inspect the product from original process to final packing according to drawing detail.Accept third party inspection and also offer Video inspection.For Crossed roller bearings, we offer 1 year warranty, if bearing problems, we replace new bearing at DDP cost.

Why we have high ABEC bearings in skateboarding. A typical scenario..... A skateboarder went into a bearing shop and asked the question “What is the fastest bearing you do?” The salesman thought for a while and said “ABEC 9, but they are very expensive” Unfortunately, due to the language barrier between them this has resulted in the current market situation. “Fastest” in skateboard speak is “Lowest torque” in bearing speak. “Fastest” in bearing speak is the bearing that has the highest RPM before failure. The difference between an ABEC1 bearing and an ABEC9 bearing is ONLY the tolerances to which it is made. An ABEC1 bearing is not made to as close a tolerance as an ABEC9 one. The differences between them are measured in microns or thousandths of a millimetre. The bore (the hole in the middle) of a skateboard bearing is 8mm. For an ABEC1 bearing the tolerance band on the bore size would be between 7.9920mm and 8mm. For an ABEC9 bearing the tolerance band on the bore size would be between 7.9975mm and 8mm. This is a difference of 5.5 microns. The human eye can only see things bigger that about 45 microns (roughly half the thickness of a human hair). That’s 8 times bigger than the differences between the two bearings! One good 5 set ollie will probably change the shape of your bearings by more than that. The reason an ABEC9 bearing feels faster is that they are usually filled with oil and not grease, i.e. nothing to do with the precision of the bearing. The following table illustrates maximum revolutions per minute (RPM) with increasing tolerance (ABEC number). 608 (the primary bearing size used in skate boards)Max rpm in greaseMax rpm oil Max RPM 608-ZZ ABEC1 (1.0)3400040000 Max RPM 608-ZZ ABEC3 (1.1)3740044000 Max RPM 608-ZZ ABEC5 (1.2)4080048000 Max RPM 608-ZZ ABEC7 (1.4)4760056000 Taking this a little further..... An ABEC 1 has maximum RPM before failure if lubricated with grease of 34,000 RPM - grease being the slowest rating due to heat build up and churning drag. Assuming the worst possible case of wheel outside diameter of 40 mm. 1 revolution = 40x3.14 = 125mm of travel (roughly) Therefore a wheel travels in 1 hour 34000x60x125 = 255,000,000mm This is 255 km/h or roughly 160mph!!!! An ABEC 7 can allow for 56000 rpm – they are usually sold oiled not greased Assuming the worst possible case of 40mm diameter wheels. 1 revolution = 40x3.14 = 125mm of travel (roughly) Therefore wheel travels in 1 hour 56000x60x125 = 420,000,000mm This is 420 km/h or roughly 260mph!!!! Wheels normally overheat and fail at about 100mph due to bubbles in the urethane bursting due to heat build up. Finally the high accuracy of a component is only of use if the surrounding parts are of a similar accuracy. All skateboard trucks and wheels are made to NO WHERE NEAR the standards of the bearings so fitting high ABEC bearings in a skateboard is akin to fitting Formula 1 wheel bearings to a tractor hub. Although the above may not be popular to many who sell high ABEC rated bearings at highly inflated prices, it is designed to dispel many myths and false selling when it comes to your skateboard bearings. So now you know..... In normal skateboard conditions there will be no difference between skate bearings of differing ABEC ratings when set up identically. The differences that you can feel occur due to method of sealing and type of lubrication. The only other major difference that exists is in the quality of the materials used to make the bearing but this cannot be measured without dismantling a sample bearing and putting it through some pretty expensive tests. For further information on skates vist our skateboard links page.

A skateboarder went into a bearing shop and asked the question “What is the fastest bearing you do?” The salesman thought for a while and said “ABEC 9, but they are very expensive” Unfortunately, due to the language barrier between them this has resulted in the current market situation.