Deep groove Ball Bearings are with the characteristics of simply designed structures; low friction coefficient and high limit rotational speed. Their range of application is very wide. They can mainly carry radial load and certain thrust load. When the radial internal clearance increased, the bearings have the functions of angular contact ball bearings that a larger thrust load can also be carried.
Structures
1. Basic type 60000
Applications of this type of Bearing can be found in situations where there are no special requirements for mounting and sealing.
2. With one shield (-Z) on one side or two shields (-2Z) on both sides.
The shields are made of steel sheet. Adequate lubricating grease has been put in the deep groove ball bearings with two shields during assembling process and there is no need to clean the bearing or add lubricant as mounting. It is noncontact seal, and compared with deep groove ball bearings with seals, they have less friction and suitable for applications with high rotational speed requirement.
3. With one seal(-RS)on one side or two seals(-2RS)on both sides
The seals are made of rubber with steel sheet reinforcement. It is contact sealing that could seal much better but have high friction and low limit rotation speed if the seals contact with the outside of the inner ring; while it is non-contact sealing that has the same limit rotation speed as the basic type. The lubricant has been prefilled in the bearing with seals both sides, so there is no need to clean and fill the lubricant as mounting.
With snap ring groove on the outer ring (-N)
The snap ring can be used to locate the bearing in the axial direction so that the mounting in the housing is simplified.
Cage material
Deep groove ball bearings generally use pressed steel cages or solid cages. Phenol resin cage is suitable for application with high limit rotational speed.
Permissible Tilt Angle
Deep groove ball bearings permit tilting angle between the inner ring and outer ring. The details are listed in the Table 1.
Tolerance and Clearance
The tolerance of deep groove ball bearings is P0 basically. P5, P6, P4 and P2 are available for different application.
The radial internal clearance of deep groove Ball Bearing is as Table 3.
Dynamic equivalent radial load
Pr=XFr+YFa
Fr-Radial load (kN)
Fa-Axial load (kN)
X-Radial factor
Y-Axial factor
X and Y values see Table below.
Static equivalent radial load
P0r=Fr[kN]
P0r=0.6Fr+0.5Fa[kN]
Table 1 Permissible Tilt Angle
Radial internal clearance | The permissible angle |
0Basic group 3Group 3 4Group 4 | 8′ 12′ 16′ |
Table 2 Values of X and Y
Type of bearing | Relative axial load | Single row | Double row | e | |||||||
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X | Y | X | Y | X | Y | X | Y | ||||
Deep groove ball bearing | 0.172 0.345 0.689 1.03 1.38 2.07 3.45 5.17 6.89 | 0.172 0.345 0.689 1.03 1.38 2.07 3.45 5.17 6.89 | 1 | 0 | 0.56 | 2.3 | 1 | 0 | 0.56 | 2.3 1.99 1.71 1.55 1.45 1.31 1.15 1.04 1 | 0.19 0.22 0.26 0.28 0.3 0.34 0.38 0.42 0.44 |
Table 3 Radial internal clearance of deep groove ball bearing
μm
Nominal bore diameter d mm | C2 clearance | Standard clearance | C3 clearance | C4 clearance | C5 clearance | ||||||
Over | To | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max |
2.5 6 10
18 24 30
40 50 65
80 100 120
140 160 180
200 225 250
280 315 355
400 450 500
560 630 710
800 900 1000
1120 | 6 10 18
24 30 40
50 65 80
100 120 140
160 180 200
225 250 280
315 355 400
450 500 560
630 710 800
900 1000 1120
1250 | 0 0 0
0 1 1
1 1 1
1 2 2
2 2 2
2 2 2
2 3 3
3 3 10
10 20 20
20 20 20
20 | 7 7 9
10 11 11
11 15 15
18 20 23
23 25 30
35 40 45
55 60 70
80 90 100
110 130 140
160 170 180
190 | 2 2 3
5 5 6
6 8 10
12 15 18
18 20 25
25 30 35
40 45 55
60 70 80
90 110 120
140 150 160
170 | 13 13 18
20 20 20
23 28 30
36 41 48
53 61 71
85 95 105
115 125 145
170 190 210
230 260 290
320 350 380
410 | 8 8 11
13 13 15
18 23 25
30 36 41
46 53 63
75 85 90
100 110 130
150 170 190
210 240 270
300 330 360
390 | 23 23 25
28 28 33
36 43 51
58 66 81
91 102 117
140 160 170
190 210 240
270 300 330
360 400 450
500 550 600
650 | - 14 18
26 23 28
30 38 46
53 61 71
81 91 107
125 145 155
175 195 225
250 280 310
340 380 430
480 530 580
630 | - 29 33
36 41 46
51 61 71
84 97 114
130 147 163
195 225 245
270 300 340
380 420 470
520 570 630
700 770 850
920 | - 20 25 28 30 40
45 55 65
75 90 105
120 135 150
175 205 225
245 275 315
350 390 440
490 540 600
670 740 820
890 | 37 45
48 53 64
73 90 105
120 140 160
180 200 230
265 300 340
370 410 460
510 570 630
690 760 840
940 1040 1150
1260 |