6318/C3vl0241 Direct Current and Alternating Current Motors Insocoat Bearings

• Contact Angle: 0
• Aligning: Non-Aligning Bearing
• Separated: Separated
• Rows Number: Single
• Load Direction: Radial Bearing
• Material: Bearing Steel
• Model NO.: 6318/C3VL0241
• Certificate: ISO9001
• MOQ: 1PCS
• Payment: L/C, D/a, D/P, T/T, Western Union, Moneygram
• Delivery: 7-35 Days
• Drawing: Avalibale
• Transport Package: Single Box
• Specification: 6318/C3VL0241
• Trademark: MONTON
• Origin: Luoyang
• HS Code: 8482102000
• Production Capacity: 1000PCS/Week

Product Description

Name	Current-Insulating Bearings
Brand	MONTON
Model	6318/C3VL0241
d	90mm
D	190mm
D	43mm
Ring Material	Gcr15/Special materail
Cage Material	Brass cage
Load rating  dynamic	143KN
Load rating  static	108 KN
Fatigue Limit Load Pu[kN]	3.8
Reference speed [r/min]	7500
Limiting speed [r/min]	4800
Sealed	as customer requested
Weight	4.9KG
Design Structure	Ball
Precision	P5/P6 or as customer requested
Vibration	ZV1, ZV2, ZV3, or  as customer requested
Clearance	C0, C2, C3, or  as customer requested
Quality standard	ISO9001: 2000/SGS
Package	single box
Original	Luoyang
Service	OEM
Delivery date	Accordingly
Application	Threephase motor,Traction motor,Wind power generator

Insulated Insocoat bearings

Electric motors, generators and associated equipment are at risk when an electric current passes through their bearings. This can damage the contact surfaces of rolling elements and raceways in the bearings (electrical erosion) and rapidly degrade the grease. An additional risk in electric motors and generators comes from high frequency currents caused by the inherent stray capacitance. 

The risk of damage increases where the application uses a frequency converter.

Insulated Insocoat bearings are designed to prevent electric current from passing through the bearing have the external surfaces of either their inner or outer ring coated with an insulating aluminium oxide layer, by applying a sophisticated plasma-spray process for an outstanding quality finish  are a very cost-effective solution compared with other insulation methods.

Electrical pitting often occurs in the use of rolling bearings in high power electromotor, wind turbine generator and rail vehicles motor systems and cause sparks that damage the rolling contact surface, ultimately lead to bearing failure.

Electric insulated bearings therefore have been created and take the place of non-insulated bearings. we  applies advanced surface modification process overlay a ceramic coating on the bearing ring, to insulate the electrical current flow into bearing substrate, so the electrical pitting is prevented and bearing's service life is extended.

It is significantly more cost-effective to provide for the use of electrically insulated bearings at the planning stage. As a result, customer benefit is increased through reduced maintenance costs and higher machine availability.

SAT series are the electrically insolated bearing products developed and marketed by us The insulation has a guaranteed breakdown resistance of at least 1000V AC or DC. We can also develop tailored modes for customer on types and precision levels, as well as higher electrical insulation.

Bearing features

Protection against electrical erosion 

With insulating properties integrated into the bearing, INSOCOAT bearings can improve reliability and increase machine uptime by virtually eliminating the problem of electrical erosion.

High electrical resistance 

The aluminium oxide coating provides a minimum electrical resistance of 200 Ω and can withstand voltages up to 3 000 V DC.

Consistent electrical performance 

Plasma-spray coatings are normally hygroscopic and, therefore, vulnerable to penetration caused by condensation. To protect against this effect, INSOCOAT bearings are treated with a unique sealant.



Application of Insulated Bearings in Electric motors

1. Causes and harm of motor shaft voltage and bearing current formation

In the operation of the motor, any imbalance in the phase currents in or around the rotor's magnetic circuit can  produce a rotating system flux linkage.

When the shaft rotates, these flux chains can generate a potential difference across the shaft. This potential difference is called the shaft voltage. The shaft voltage can excite a circulating current through a loop formed by the two ends of the bearing in the shaft and the casing (closed circuit), which is called the shaft current.

In addition, the rotor core has more remanence, For a wound rotor motor, shaft voltage and shaft current are generated if two or more windings are short-circuited to the rotor core or the shaft. the bearing current is related to the structure of the motor, the power of the motor, the magnitude of the drive voltage, the rise time of the pulse, the length of the cable, etc. The larger the power of the motor, the higher the driving voltage, the steeper the rising edge of the driving voltage, and the shorter the cable, the larger the bearing current.


2. How to block shaft current - use electrically insulated bearings

In order to avoid damage to the bearing caused by the shaft current, effective measures should be taken to isolate the shaft current. For large motors with independent bearing housings at both ends, spacers made of insulating material can be placed between the bearing housing and the metal base. For a motor in which an ordinary bearing and a casing are integrated, an Electrically insulated bearing is generally used at one end thereof (often arranged at the non-spindle end).

For high requirements, insulated bearings are installed at both ends. The insulating bearing used is generally a method of attaching (generally coating) an insulating layer to the outer ring. In some cases, the inner and outer rings are also provided with an insulating layer.

Electrically insulated bearings avoid damage caused by electrical corrosion, so they are more reliable in operation than in conventional bearings. And compared to other insulation methods, such as shaft or housing insulation, etc. More cost effective and reliable. Insulated bearings have the same dimensions and basic technical features as non-insulated bearings Suitable for motors, generators, especially variable frequency motors.

CoatMaster (China Bearing manufacturer), As the exprienced Electrically Insulated Bearing manufacturer of China, Not only produce insulated deep groove ball bearing, insulated cylindrical roller bearing, insulated tapered roller bearing, insulated angular contact ball bearing and the other type of insulated bearing, but also supply complete and expert solution for electric motor and the other applications where need insulated bearing. if you have problem make you distracted about the insulated bearing, just contact with our bearing technical team.

Bearing	Dimension			Basic Dynamic Load Rating		Fatigue Limit Load	rated speed
				dynamic	static		Reference speed	Limiting speed
	d[mm]	D[mm]	B[mm]	C[kN]	C0[kN]	Pu[kN]	[r/min]	[r/min]
6314/C3VL0241	70	150	35	111	68	2.75	9500	6300
6314M/C3VL0241	70	150	35	111	68	2.75	9500	9000
6215/C3VL0241	75	130	25	68.9	49	2.04	10000	6700
6315/C3VL0241	75	160	37	119	76.5	3	9000	5600
6315M/C3VL0241	75	160	37	119	76.5	3	9000	8000
6216/C3VL0241	80	140	26	72.8	55	2.2	9500	6000
6316/C3VL0241	80	170	39	130	86.5	3.25	8500	5300
6316M/C3VL0241	80	170	39	130	86.5	3.25	8500	7500
6217/C3VL0241	85	150	28	87.1	64	2.5	9000	5600
6317/C3VL0241	85	180	41	140	96.5	3.55	8000	5000
6317M/C3VL0241	85	180	41	140	96.5	3.55	8000	7500
6218/C3VL0241	90	160	30	101	73.5	2.8	8500	5300
6318/C3VL0241	90	190	43	151	108	3.8	7500	4800
6318M/C3VL0241	90	190	43	151	108	3.8	7500	7000
6219/C3VL0241	95	170	32	114	81.5	3	8000	5000
6219M/C3VL0241	95	170	32	114	81.5	3	8000	7500
6319/C3VL0241	95	200	45	159	118	4.15	7000	4500
6319M/C3VL0241	95	200	45	159	118	4.15	7000	6300
6220/C3VL0241	100	180	34	127	93	3.35	7500	4800
6320/C3VL0241	100	215	47	182	140	4.75	6700	4300
6320M/C3VL0241	100	215	47	182	140	4.75	6700	6000
6222/C3VL0241	110	200	38	151	118	4	6700	4300
6222M/C3VL0241	110	200	38	151	118	4	6700	6300
6322/C3VL0241	110	240	50	216	180	5.7	6000	3800
6322M/C3VL0241	110	240	50	216	180	5.7	6000	5300
6224/C3VL0241	120	215	40	153	118	3.9	6300	4000
6324/C3VL2071	120	260	55	216	186	5.7	5600	3400
6324M/C3VL2071	120	260	55	216	186	5.7	5600	5000
6226/C3VL2071	130	230	40	163	132	4.15	5600	3600
6326/C3VL2071	130	280	58	242	216	6.3	5000	3200
6326M/C3VL2071	130	280	58	242	216	6.3	5000	4500
6228/C3VL2071	140	250	42	174	150	4.55	5300	3400
6328/C3VL2071	140	300	62	265	245	7.1	4800	3000
6328M/C3VL2071	140	300	62	265	245	7.1	4800	4300
6230/C3VL2071	150	270	45	186	166	4.9	5000	3200
6330/C3VL2071	150	320	65	286	285	7.8	4300	2800
6332M/C3VL2071	160	340	68	291	285	7.65	4000	3800
6334M/C3VL2071	170	360	72	332	340	8.8	3800	3400
6336M/C3VL2071	180	380	75	371	405	10.4	3600	3200