SKF Nj2305EV/C4 Cylindrical Roller Bearing for Motor Crane Hook

• Rolling Body: Roller Bearings
• The Number of Rows: Single
• Outer Dimension: Small and Medium-Sized (60-115mm)
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: NJ2305EV/C4
• Material: Bearing Steel
• Spherical: Non-Aligning Bearings
• Load Direction: Axial Bearing
• Separated: Separated
• Model Name: Cylindrical Roller Bearing
• Stock: Rich Stock
• Factory or Trade: Industry and Trade
• Quality: ABEC-1, Z1V1
• Lubrication: Grease or Oil
• Cage: Steel or Nylon
• Certificate: ISO9001:2008
• Clearance: C2 C0 C3 C4 C5
• Precision: P0 P6 P5
• Vibration: Z4, Z3, Z2, Z1
• Samples: Available
• Seals Type: Open
• Limiting Speed: 3000-3600r/Min
• Advantage: Low Noise
• Bearing Material: Bearing Steel
• Transport Package: Air/Sea; Box+Carton+Pallet
• Specification: all size
• Trademark: DNSKF
• Origin: China
• HS Code: 8482102000
• Production Capacity: 100000/Mouth
• Package Size: 40.00cm * 35.00cm * 20.00cm
• Package Gross Weight: 20.000kg

Product Description

Product Description

Classification of cylindrical roller bearings:

1.Single row cylindrical roller bearing: Single row cylindrical roller bearing is a separable bearing that is easy to install and disassemble. Both rings can adopt a tight fit, and the modified contact line between the roller and raceway can reduce stress concentration.

2.Double row cylindrical roller bearings: Double row cylindrical roller bearings belong to the category of floating bearings, and their separability makes installation and disassembly very convenient. Both ferrules can be used with a tight fit. Double row cylindrical roller bearings are almost not allowed to have inclination angles.

Character

Characteristics of cylindrical rollers

1. The roller and raceway are in line contact or repaired line contact, with a large radial bearing capacity, suitable for bearing heavy loads and impact loads.
2. The friction coefficient is small, suitable for high speed, and the limiting speed is close to Deep Groove Ball Bearing.
3. The N-type and NU type can move axially and adapt to changes in the relative position of the shaft and casing caused by thermal expansion or installation errors. They can be used as free end supports.
4. The machining requirements for the shaft or seat hole are high, and the relative deviation of the outer ring axis after bearing installation should be strictly controlled to avoid contact stress concentration.
5. The inner or outer ring can be separated for easy installation and disassembly.
 

Advantages of the DNT product
 

1.Low noise: multiple experiments reaching below 20 decibels,
2.High precision: precision manufacturing processes achieve ultra-high precision,
3.High quality: High temperature and corrosion resistance to ensure bearing performance,
4.High hardness: maintained at 58-65 ° with excellent wear resistance,
With optimized internal assembly and high-speed polymer cages, reducing bearing energy consumption,
 

Number of rolling columns of cylindrical rollers:
(1)single rows: 
N,NU tpye
NJ,NF tpye
NUP,NFP tpye
NH(NJ+HJ) tpye
(2)double rows:
NN,NNU tpye
NNF tpye
(3)four rows:
FC type
FCD type

Exploded view

 

Method of adjusting radial clearance:

1. The side clearance of cylindrical and elliptical bearing shells can be adjusted by manual scraping or by adding pads to the bearing split surface after turning and scraping.
2. The top clearance of cylindrical and elliptical bearing shells can be adjusted by manual scraping or by adding pads to the bearing split surface when conditions permit.
3. For fixed bearing shells with multiple oil wedges, in principle, it is not allowed to repair or adjust the clearance of the bearing shells. If the clearance is not suitable, a new bearing shell should be replaced.
4. For multi oil wedge tilting bearing pads, it is not allowed to repair or scrape the pads. When the clearance is not suitable, the pads should be replaced. For pads with adjustable thickness, the amount of pads can be adjusted by adding a stainless steel pad under the adjustment block at the back of the pad, or by thinning the thickness of the adjustment block. Note that for multi oil wedge tilting bearing pads, the thickness error between the same set of pads should be less than 0.01mm.
 

Application

1.Large and medium-sized electric motors,
2.locomotives and vehicles,
3.machine tool spindles,
4.internal combustion engines,
5.generators, gas turbines,
6.reducers, rolling mills,
7.vibrating screens,
8. lifting and transportation machinery.

Product Parameters

Cylindrical roller bearing
Bearing No.	Boundary Dimensions(mm)			Basic Load Ratings(N)		Limiting Speed
	d	D	B	Cr	Cor	Oil(RPM)
N203	17	40	12	11400	9100	19000
NJ203	17	40	12	11400	9100	19000
NJ203ETN	17	40	12	16900	13800	19000
NU203	17	40	12	11400	9100	19000
NU203ETN	17	40	12	16900	13800	19000
NJ2203E	17	40	16	22800	20300	16400
N204	20	47	14	15800	13100	16400
NF204	20	47	14	15800	13100	16400
NJ204	20	47	14	17000	14400	16400
NU204	20	47	14	15800	13100	16400
N304	20	52	15	21800	17700	13800
NJ304	20	52	15	21800	17700	13800
NU304	20	52	15	21800	17700	13800
NUP304ETN	20	52	15	31500	26800	13100
NJ2304ETN	20	52	21	42000	38700	13000
N205	25	52	15	17000	14900	13800
NF205	25	52	15	17000	14900	13800
NJ205	25	52	15	17000	14900	13800
NJ205E	25	52	15	29900	28400	13100
NJ205ETN	25	52	15	29900	28400	13100
NU205	25	52	15	17000	14900	13800
NU205/C3	25	52	15	15400	14900	13800
NU205E	25	52	15	29900	28400	13100
NU205ETN	25	52	15	29900	28400	13100
NUP205	25	52	15	17000	14900	13800
NCL205	25	52	15	24600	24300	13100
N2205	25	52	18	24100	23300	13100
NJ2205	25	52	18	24100	23300	13100
NU2205	25	52	18	24100	23300	13100
NU2205/C3	25	52	18	21400	22800	13100
NU2205EV	25	52	18	41400	43300	11400
N305	25	62	17	29100	25200	11400
N305ENTN/C3	25	62	17	41500	37400	11400
NF305	25	62	17	29100	25200	11400
NJ305	25	62	17	29100	25200	11400

Installation precautions
1.Avoid strong impact since the contact surface between the bearing raceway surface and the rolling element is close to point contact. Excessive impact force will cause indentation on the contact surface,so knock or drop impact must be avoided
2.Avoid dust entering the bearing.If dust enters the bearing during use the raceway surface and rolling element surface will be damaged, resulting in abnormal noise or poor rotation of the bearing.

 

FAQ

1.Is the company a production factory or a trading company?

Shandong Dente International Trade Co.,Ltd is a manufacturing enterprise focusing on bearings and integrating research, production and sales.

2.How many the MOQ of your company?

Depending on the size of the bearing, the MOQ is variable, if you are interested, you can contact me for a quote.

3.Does the company accept OEM or customized bearings?
In addition to standard products, we also supply non-standard and modified standard products for special application. Meanwhile, we provide OEM service.

4.What are the company's delivery terms?
We can accept EXW,FOB,CFR,CIF,etc. You can choose the one which is the most convenient cost effective for you.
5.What is your delivery time?
Most orders will be shipped within 7-15 days of payment being received.


Any problems, pls feel free to contact us.100% after-sales service!

 We can supply high-quality bearing products with competitive price and the shortest delivery time if you choose us!