Deep Groove Ball Bearings 6900 series

1. High accuracy 2. Low noise 3. Low weight 4. Can be customized according to your needs 5. Can provide small & miniature st

 Application

Widely used in home appliances, electric tools, fitness equipment, motors, medical devices, 

motorbikes, textile machines, autos and other areas.Deep Groove Ball Bearing are the most common bearing type

Deep groove ball bearing feature1) Model: Open, Z, ZZ, RZ,2RZ,RS, 2RS 2) Quality level: reach the same level as the Japanese and European bearings 3) Tolerance level: ABEC-1 (P0), ABEC-3 (P6),ABEC-5(P5)4) Noise Level: EMQ V1 Z2, EMQ V2 Z3, EMQ V3 Z4, EMQ V4 5)Application: home appliances,low noise and high speed electric motors; automotive components, pumps,machinery.

Bearing ClearanceThe radial paly of NBK bearings might be divided into five groups according to ISO standard.

Borediameterd(mm)		C2		C0		C3		C4		C5
Overt	To	Min	Max	Min	Max	Min	Max	Min	Max	Min	Max
2.5 6		0 7		2 13		8 23		14 29		20 37
6 10		0 7		2 13		8 23		14 29		20 37
10 18		0 9		3 18		11 25		18 33		25 45
18 24		0 10		5 20		13 28		20 36		28 48
24 30		1 11		5 20		13 28		23 41		30 53
30 40		1 11		6 20		15 33		28 46		40 64
40 50		1 11		6 23		18 36		30 51		45 73

Shield,seal and lubrication The structure of bearings consists of open and close types,and the close type might be equipped with shield sing or both sides(z,z);with non-contact seal on single single or both sides (L, 2L ),and with contact seal on single side or both sides (RS,2RS). Our bearings are alreaby filled with proper oil grease, whitch can be used directly without any wash .They are fit for low or middle load,and low or middle speed.The work temperature is -20•C ~+ 110 •C .lf the conditions. Change,please connect with our engineers.Bearing collarand ball materidl The best material for bearing is high carbon chromium bearing steel,which has hardness,strong rolling fatigue resistance,wearing resistance and stable dimension.lts chemical composition is:

(wt%)	C 0.9-1.05	Cr 1.40-1.63	Si 0.15-0.35	Mn 0.25-0.45	P 0.027	P = 0.02
(wt%)	Ni <0.23	Cu = 0.25	Mo = 0.1	Sn <0.03	As <0.04	As <0.005
(wt%)	Sb <0.002	Pb <0.002	O <0.001	Al <0.05	Ca <0.01

Beraing accuracyBearing accuracy refers to accuracy on dimension and rotation. According to national standard, the bearing accuracy is divided into five classes:Classes 0,Classes 6,Classes 5,Classes 4,Class 2.AII of them are equivalent to ISO standard.The Comparison of different accuracy classes are shown as follows: Inner ring

Bore Diameterd(mm) over to	Dmp Bore Tolereance limits	Kia Radial Runout	SD Side Runout with bore	Sia Axis Runout	Bs Width limits	Vbs Width Variation
	Class0 Class6 Class5 Class4 Class2	Class0 Class6 Class5 Class4 Class2 Max	Class5 Class4 Class2 Max	Class5 Class4 Class2 Max	Class0 Class6 Class5 Class4 Class2	Class0 Class6 Class5 Class4 Class2 Max
2.5 10 10 18 18 30 30 50	0 -8 0-7 0-5 0-4 0-2.5 0 -8 0-7 0-5 0-4 0-2.5 0 -10 0-8 0-6 0-5 0-2.5 0 -12 0-10 0-8 0-4 0-2.5	•  6 4 2.5 1.5 •  7 4 2.5 1.5 •  8 4 3 2.5 15 10 5 4 2.5	7 3 1.5 7 3 1.5 8 4 1.5 8 4 1.5	7 3 1.5 7 3 1.5 8 4 2.5 8 4 2.5	0 -120 0 -40 0 -40 0 -120 0 -80 0 -80 0 -120 0 -120 0 -120 0 -120 0 -120 0 -120	15 15 5 2.5 1.5 20 20 5 2.5 1.5 20 20 5 2.5 1.5 20 20 5 3 1.5

Outer ring

Out Diameter D(mm)	Dmp Bore Tolerance limits	Kea Radia1Runout Max	SD Side Runout with bore Max	Sea Axis Runout Max	Cs Width limits	Vcs Width Variaton Max
	Class0 Class6 Class5 Class4 Class2	Class0 Class6 Ckass5 Class4 Class2	Class5 Class4 Class2	Class5 Class4 Class2	Class0 Class6 Class5 Class4 Class2	Class0 Class6 Class5 Class4 Class2
6 18 18 30 30 50 50 80 80 120	0 -8 0 -7 0 -5 0 -4 0 -2.5 0 -9 0 -8 0 -6 0 -5 0 -4 0 -11 0 -9 0 -7 0 -6 0 -4 0 -13 0 -11 0 -9 0 -7 0 -4 0 -15 0 -13 0 -10 0 -8 0 -5	15 8 5 3 1.5 15 9 6 4 2.5 20 10 7 5 2.5 25 13 8 5 4 35 18 10 6 3	8 4 1.5 8 4 1.5 8 4 1.5 8 4 1.5 9 5 2.5	8 5 1.5 8 5 1.5 8 5 2.5 10 5 4 11 6 5	Same as the matched inner ring	5 2.5 1.5 5 2.5 1.5 Same 5 2.5 1.5 as the 6 3 1.5 Matched 8 4 2 inner ring

Deep Groove Ball Bearings 6900 series