Original NSK/ NTN/ Koyo/ NACHI Tapered Roller Bearing (30208)

• Customization: Available
• Rolling Body: Roller Bearings
• The Number of Rows: Single
• Model NO.: 30208
• Material: Bearing Steel
• Spherical: Non-Aligning Bearings
• Load Direction: Thrust Bearing
• Separated: Separated
• MOQ: 10
• Size: 40*80*19.75
• Transport Package: Plastic Packing\Box Packaging
• Specification: SGS ISO
• Trademark: OEM brand
• Origin: Shandong, China
• HS Code: 8482200000
• Production Capacity: 100000PCS/Year

Product Description

Original  NSK/ NTN/ KOYO/ NACHI Tapered Roller Bearing (30208)

1. Description of tapered roller bearing
Main Characteristics for Tapered Roller Bearings:
This kind of bearing is a separation-bearing, tapered raceway is on both the outer and inner ring, and rollers are round-table-shaped. Rollers and raceway are line contact, may bear a heavier load form both radial and axial, but also can bear axial loads only. When contact angle is bigger, the axial capacity is higher.
Tapered Roller should be designed to achieve internal and external roller Raceway and the contact line extension in the cross bearing the same point on the axis, in order to achieve pure rolling.
The new designed tapered roller bearing should be used fortified structure, increase the diameter of rollers, lengthen the roller, increase the rollers' number, and with a crown of the rollers, making the bearing's capacity and fatigue life improved significantly. Spherical and cone contact are used between the roller large end and ribs, to improve the lubrication.
The number of rows of such Bearing can be divided into different types of single-row, double-row and four-row. And this kind of bearing are used British system products normally.

Main Application:
Single-row: The front-wheel vehicle, the rear wheels, the machine spindle, shaft car vehicles, rolling mill, construction machinery, lifting equipment, printing machinery and all kinds of deceleration devices.
Double-row: The machine spindle, and rolling stock
Four-row: Roller Bearing

2. Structure
Single-row taper roller bearing
Taper roller bearing with large tapered angle
Double-row taper roller bearing with two inner ring
Single-row taper roller bearing with capped edge on outer ring
Two-row taper roller bearing with double inner ring
Inch taper roller bearing
Double-row tapered roller bearing with double outer rings
Large cone angle tapered roller bearing
Double-row tapered roller bearing with double inner rings
Single-row tapered roller bearing with snap rib on outer ring
Four-row tapered roller bearing
Double-row tapered roller bearing with double inner rings and inner spacer.
British system tapered roller bearing

3. Cage
The steel stamping cage is used normally, when diameter is more than
650mm, a roller-pillar welding cage is used.

4. Features
Large load capacity
Long life

Designation	Dimensions							Basic Load Ratings		Limiting Speed	Mass
	d	D	T	B	C	r1	r	Cr	Cor
						min.	min.	Dynamic	Static
SFT	mm							kN		Rpm	g
30203	17	40	13.25	12	11	1	1	20.7	21.9	9000	79
30303	17	47	15.25	14	12	1	1	28.3	27.2	8500	129
30204	20	47	15.25	14	12	1	1	28.2	30.6	8000	126
30304	20	52	16.25	15	13	1.5	1.5	33.1	33.2	8000	165
30205	25	52	16.25	15	13	1	1	32.2	37	7500	154
30305	25	62	18.25	17	15	1.5	1.5	46.9	48.1	6700	263
30206	30	62	17.25	16	14	1	1	43.3	50.5	6300	231
30306	30	72	20.75	19	16	1.5	1.5	59	63.1	5600	387
30207	35	72	18.25	17	15	1.5	1.5	54.2	63.5	5300	331
30307	35	80	22.75	21	18	2	1.5	75.3	82.6	5000	515
30208	40	80	19.75	18	16	1.5	1.5	63	74	4800	422
30308	40	90	25.25	23	20	2	1.5	90.9	107.6	4500	747
30209	45	85	20.75	19	16	1.5	1.5	67.9	83.6	4500	474
30309	45	100	27.25	25	22	2	1.5	108.9	129.8	4000	984
30210	50	90	21.75	20	17	1.5	1.5	73.3	92.1	4300	529
30310	50	110	29.25	27	23	2.5	2	130.1	157.1	3600	1280
30211	55	100	22.75	21	18	2	1.5	90.8	113.7	3800	713
30311	55	120	31.5	29	25	2.5	2	153.3	187.6	3200	1630
30212	60	110	23.75	22	19	2	1.5	103.3	130	3400	904
30312	60	130	33.5	31	26	3	2.5	171.4	210	3000	1990
30213	65	120	24.75	23	20	2	1.5	120.6	152.6	3000	1130
30313	65	140	36	33	28	3	2.5	195.9	241.7	2600	2440
30214	70	125	26.25	24	21	2	1.5	132.3	173.6	3000	1260
30314	70	150	38	35	30	3	2.5	21.9	271.7	2400	2980