Needle Roller Bearing(NA, RNA, RNA69, NKI, NKIS, NK) FBX needle bearing can take big radial load. Such a bearing has two kinds, with and without inner ring which is made up of a machined outer ring, a needle and cage assemblies and a separable inner ring. Main structure frame: NK- needle bearing without inner ring, light series NKI- needle bearing, light series NKS- needle bearing without inner ring, heavy series NKIS- needle bearing, heavy series

1. Material: *52100 Hardened Chrome Steel forNeedle Bearing *Low Carbon Steel Bearing for Cage, *Case Hardened Steel for Cup 2. Features: *Extremely high speed *High load capacity *Low profile, lightweight caged *Caged needle bearings offer up to 3X the speed of uncaged designs *Extremely low rolling friction *High lubrication capacity *Low sensitivity to misalignment *Needles have high length to diameter ratios 3. NOTES: Hardened shafts required RRc 58-60.

Inch single row tapered roller bearings are different from the metric bearings in structure, mounting dimension and rotate speed precision. Inch single row Tapered roller bearings are generally of separable design and have tapered cone and cup raceway between which tapered roller are arranged. Category: Inch tapered roller bearings single row Inch tapered roller bearings double row Inch tapered roller bearings four row Specification Boundary dimensions(mm) Mass(kg)

**SI2N4 **ZrO2 **SSIC Si3N4 (Silicon Nitride) Ceramic Bearings The ultimate hub has to have the ultimate bearings. Silicon Nitride (Si3N4) ceramic bearings are 30% lighter than steel and 40% stronger. So finely balanced, they have an incredible maximum spin rating of 300, 000 rpm under load. Manufactured in matched sets of 15 balls per cartridge, they exhibit variance in size and sphericity of LESS than 2 millionths of an inch among the entire bearing set.

The ultimate bearing for inline, skate board or luge racers. Solid Si3N4 ceramic roller balls. Ceramic ABEC 7 bearings are used by the serious skater, speed boarder or luge racer.Size 688,mini bearing,8*16*5 Axle 8mm Rings Chromer steel Balls Si3N4 ceramic Cage Nylon Lubrication Speed master oil Seal/Shield Both sides sealed Color Black.Can be made as customer’s reuqest Class Ceramic ball bearing Logo Ceramic 688RS.Can be made as customer’s request

Low density: Due to low density, ceramic bearings have low centrifugal load and create little heat, so they can work in the conditions of higher speed Rational elastic ratio: The elastic ratio of ceramics is higher than that of steel, thus increasing bearing's dynamic stiffness, however, the elastic ratio should not be too high, otherwise, excessive elastic ratio will create stress concentration to decrease the bearing capacity Low thermal expansion:
 

Full Si3N4 bearing has some better performance than ZrO2, the rings and balls made by full ceramic material: Si3N4, as a standard constructure, the cage made by PTFE, generally we also could make the cage with GFRPA66-25, PEEK, PI, Phenolic Textolite Tube, etc. Compares than the material of ZrO2, The SiN4 ceramics bearings could endure heavier load and could be used in higher temperature environment.

1. Typical Features High carrying capacity and rigidity High precision, good stability Long service life, low noise 2. Wide Applications WZFB thrust ball bearings are used in machine tool spindles, the rotational worktable of vertical lathes, automobile steering gears and so on 3. Wide varieties WZFB can serve you with thrust ball bearings of different sizes as long as the ID is over 70mm and OD is less than 1600mm 4. Strict inspection system and perfect after sales services