High Quality Needle Roller Bearing Na4918 Size 90*105*125 mm

• Customization: Available
• Cage: Without Cage
• Rows Number: Single
• Model NO.: NA4918
• Load Direction: Radial Bearing
• Style: Without Outer Ring
• Material: Bearing Steel
• Type: Closed
• Transport Package: Standard Export Box
• Specification: 90*105*125mm
• Trademark: AMC or other brand
• Origin: China
• HS Code: 8482102000
• Production Capacity: 100000

Product Description

1. Needle Roller Bearing NA4918  size 90*105*125 mm .

Needle roller bearings with cylindrical roller bearings,relative to its diameter, roller is fine and long. This is called needle roller. Although it has a small section, the load bearing capacity of bearing still had high, with thin and long needle bearing roller, so the radial structure is compact, compered with the other bearings,the size of the inner diameter and load capacity is the same.and its has the minimum size of outside diameter, especially for supporting structure of radial installation size restricted.

2. Product Description . 
 

Needle roller bearing with inner ring
The needle roller bearing with inner ring is necessary when shaft could not be used as bearing race. The inner ring or outer ring with needle roller or cage assembly units could be assembled individually.
Needle roller bearing of sealed ring with or without inner ring
Single sided or double-faced sealing HXB series needle roller could avoid soil. The sealing ring is of butadiene acrylonitrile rubber. Its working temperature scope is between minus 30 and 180. Lubricant is No.2 or No.3 high-performance lithium based grease. The longer re-lubricating interval period exists for enough storing lubricant grease space. The inner ring is 1mm thicker than the exterior ring, so sealing ring could work even when shaft moves down. There is lubricant aperture in inner ring in common.

Standard bearing
The bearings of standard grade are all proved up to dimensional precision and geometric accuracy of standard size. On exterior ring, there are lubricate hole and lubrication groove.

Dimensional tolerance
To bearing of high-precision requirements, it is required to inform the precision grade. To needle roller bearing with or without inner ring, whose radial clearance is flexible, it is also suitable.

Specific requirements
Please note supplementary code of bearing code when orders exterior ring of arc shape; so does order exterior ring with lubricate hole.
The bearing ring of grinding function is necessary with the purpose to get high-precision bearing device. Then the interior ring grinded after being assembled so as to improve rotating precision.

3. We also can offer following  bearings , please check . 
 

Bearing No.	Boundary dimensions(mm)				Basic load ratings(N)		Limiting speeds(rpm)	Mass(g)
	d	Fw	D	B	Cr	Cor	Oil
NA4900	10	14	22	13	8006	9000	23700	21.00
NA4901	12	16	24	13	5047	6352	20000	25.10
NA4902	15	20	28	13	6447	9053	18800	32.00
NA4903	17	22	30	13	7010	10010	17000	32.80
NA4904	20	25	37	17	11912	16594	16200	70.20
NA49/22	22	28	39	17	12996	19175	14360	76.00
NA4905	25	30	42	17	13452	20475	13832	76.00
NA49/28	28	32	45	17	13900	20100	13832	90.70
NA49/32	32	40	52	20	19000	32600	11134	150.00
NA4907	35	42	55	20	19800	41500	11134	151.00
NA4908	40	48	62	22	31036	63873	8567	123.00
NA4909	45	50	68	22	37000	96500	8052	260.00
NA4910	50	58	72	22	41000	72000	7526	264.00
NA4911	55	63	80	25	50600	96580	7156	386.00
NA4912	60	68	85	25	52800	110500	6022	412.00
NA4913	65	72	90	25	57500	110500	6022	435.00
NA4914	70	80	100	30	79000	154000	5111	712.00
NA4915	75	85	105	30	82000	158000	5111	765.00
NA4916	80	90	110	30	81000	170500	5111	870.00
NA4917	85	100	120	35	111000	237000	4600	1250.00
NA4918	90	105	125	35	114000	250000	4400	1312.00
NA4919	95	110	130	35	116000	260000	4200	1371.00
NA4920	100	115	140	40	120000	2740000	4000	1900.00
NA4922	110	125	150	40	132000	290000	3700	2070.00