NU 211 ECM/C3VL0241 Ceramic Insulated Bearings

NU 211 ECM/C3VL0241

-- Dimension: 55*100*21mm

-- Weight: 0.8kg

-- Type: Cylindrical roller bearings,Single Row

-- Feature: Outer ring with Ceramic coating design

-- C3: Internal clearance greater than Normal

World TOP QUALITY NU 211 ECM/C3VL0241 Electrically Insulated Bearings

d	55 mm	Bore diameter
D	100 mm	Outside diameter
B	21 mm	Width
D1	≈86 mm	Shoulder diameter outer ring
F	66 mm	Raceway diameter inner ring
s	max.1 mm	Permissible axial displacement from the normal position of one bearing ring relative to the other
r1,2	min.1.1 mm	Chamfer dimension
r3,4	min.1 mm	Chamfer dimension

Electrically Insulated Bearings NU 211 ECM/C3VL0241 are one kind of Electrically Insulated Cylindrical roller bearing design. NU 211 ECM/C3VL0241 also called Caramic Coated Bearings, The material are adopt high quality chrome steel, this design are separable. the bearing ring with the rollers and cage assembly can be separated from the other ring, single row cylindrical roller bearings not only NU series design, but also N, NJ, NUP design, NU 211 ECM bearing have two integral flanges on the outer ring and no flanges on the outer ring. this kind of bearing can accommodate axial displacement of the shaft relative to the housing in both directions.

Single Row Cylindrical roller bearing NU 211 ECM/C3VL0241 is one kind of Current Insulated bearings, it consist of Inner Ring with Coated, or outer ring with coating, brass or nylon, Brass cage and steel rollers, the cylindrical roller and raceway of the rings are line contact, so cylindrical roller bearings are the same with spherical roller bearing, tapered roller bearing, thrust roller bearing and the other kinds of roller bearings, they all have larger load capacity than ball bearings, cylindrical roller bearing mainly carry radial load, Small friction between the rollers and the ribs of the rings make the cylindrical roller bearings are suitable for the application which are high speed rotation. There are many different design according to the ribs of the rings, NU, NJ, NUP, N, NF series single row cylindrical roller bearing, Insulated Cylindrical roller bearings focus on used in Electrical Motors.

The effects of stray electric current Electric current passing through the bearing can cause micro-cratering on the raceways of the inner and outer rings and on the rolling element surfaces. Heat generated by the electrical discharges causes local melting that creates micro craters and changes in the structure of the metal, which can be recognized as a dull grey discoloration of the raceways. If such a bearing continuous to be operated, further a wash boarding pattern may develop as a secondary damage.

Local high temperatures cause the additives in the lubricant to char or burn the base oil. This causes the additives to be consumed more quickly. In the case of grease lubrication, the grease turns black and hard. This signiicantly shortens grease life, leading to shorter bearing service life.

Product Features of NU 211 ECM/C3VL0241 Bearings

1. High insulation properties

To prevent electric corrosion in bearings, a highly productive aluminum ceramic coating material is used to coat the outer ring, and by combining optimized additives, insulation performance is improved by about tenfold.

2. Improved durability

· Optimizing bearing elements improves film impact resistance by a factor of 3x.

· Optimized ceramic coating materials makes for excellent heat dissipation.

Product Benefits

The new product is designed to improve the reliability of motors in general industrial machinery, thereby contributing to the greater adoption of inverter motors.

• Two functions in one solution

– a bearing function

– electrical insulation

• Virtually eliminates premature bearing failures caused by stray electric currents

• Increased machine uptime

• Reduced maintenance costs

• Provide an economical solution when compared with other insulation solutions

• Global availability of a wide assortment