Shaft Load

General

If the maximum permissible forces at the motor shaft are exceeded, this will result in premature wear of the bearing or shaft breakage.

 WARNING
UNINTENDED EQUIPMENT OPERATION DUE TO MECHANICAL DAMAGE TO THE MOTOR
  • Do not exceed the maximum permissible axial and radial forces at the motor shaft.
  • Protect the motor shaft from impact.
  • Do not exceed the maximum permissible axial force when pressing components onto the motor shaft.
Failure to follow these instructions can result in death, serious injury, or equipment damage.

Force for Pressing On

The force applied during pressing on must not exceed the maximum permissible axial force. Applying assembly paste to the shaft and the component to be mounted reduces friction and mechanical impact on the surfaces.

If the shaft has a thread, use it to press on the component to be mounted. This way there is no axial force acting on the bearing.

It is also possible to shrink-fit, clamp or glue the component to be mounted.

The following table shows the maximum permissible axial force FA at standstill.

Characteristic

Unit

Value

SH3040

SH3055

SH3070

SH3100

SH3140

SH3205

Maximum axial force FA at standstill

N

(lbf)

20

(4.5)

40

(9)

80

(18)

160

(36)

300

(65)

740

(165)

Shaft Load

The following conditions apply:

  • The permissible force applied during pressing on must not be exceeded

  • Radial and axial limit loads must not be applied simultaneously

  • Nominal bearing service life in operating hours at a probability of failure of 10% (L10h = 20000 hours)

  • Mean speed of rotation n = 4000 rpm

  • Ambient temperature = 40 °C (104 °F)

  • Peak torque = Duty types S3 - S8, 10% duty cycle

  • Nominal torque = Duty type S1, 100% duty cycle

Shaft load

The point of application of the forces depends on the motor size:

Characteristic

Unit

Value

SH3040

SH3055

SH30701, SH30702

SH30703

SH31001, SH31002, SH31003

SH31004, SH3140

SH3205

Value for X

mm

(in)

12.5

(0.49)

10

(0.39)

11.5

(0.45)

15

(0.59)

20

(0.76)

25

(0.98)

40

(1.57)

The following tables show the maximum radial shaft load FR and the maximum axial shaft load FA for SH3040:

Speed of rotation

Unit

Value

SH30401

SH30402

FR

FA

FR

FA

1000 rpm

N

(lbf)

130

(29)

26

(6)

145

(32)

29

(7)

2000 rpm

N

(lbf)

105

(24)

21

(5)

115

(26)

23

(5)

3000 rpm

N

(lbf)

90

(20)

18

(4)

100

(22)

20

(4)

4000 rpm

N

(lbf)

85

(19)

17

(4)

90

(20)

18

(4)

5000 rpm

N

(lbf)

76

(17)

16

(4)

85

(19)

17

(4)

6000 rpm

N

(lbf)

72

(16)

15

(3)

80

(80)

16

(4)

7000 rpm

N

(lbf)

68

(15)

14

(3)

76

(17)

15

(3)

8000 rpm

N

(lbf)

65

(15)

13

(3)

72

(16)

14

(3)

9000 rpm

N

(lbf)

63

(14)

12

(3)

70

(16)

13

(3)

10000 rpm

N

(lbf)

60

(13)

11

(2)

67

(15)

12

(3)

The following tables show the maximum radial shaft load FR and the maximum axial shaft load FA for SH3055:

Speed of rotation

Unit

Value

SH30551

SH30552

SH30553

FR

FA

FR

FA

FR

FA

1000 rpm

N

(lbf)

340

(76)

68

(15)

370

(83)

74

(17)

390

(88)

78

(18)

2000 rpm

N

(lbf)

270

(61)

54

(12)

290

(65)

58

(13)

310

(70)

62

(14)

3000 rpm

N

(lbf)

240

(54)

48

(11)

260

(58)

52

(12)

270

(61)

54

(12)

4000 rpm

N

(lbf)

220

(49)

44

(10)

230

(52)

46

(10)

240

(54)

48

(11)

5000 rpm

N

(lbf)

200

(45)

40

(9)

220

(49)

44

(10)

230

(52)

46

(10)

6000 rpm

N

(lbf)

190

(43)

38

(9)

200

(45)

40

(9)

210

(47)

42

(9)

7000 rpm

N

(lbf)

180

(40)

36

(8)

190

(43)

38

(9)

200

(45)

40

(9)

8000 rpm

N

(lbf)

170

(38)

34

(8)

190

(43)

38

(9)

190

(43)

38

(9)

The following tables show the maximum radial shaft load FR and the maximum axial shaft load FA for SH3070:

Speed of rotation

Unit

Value

SH30701

SH30702

SH30703

FR

FA

FR

FA

FR

FA

1000 rpm

N

(lbf)

660

(148)

132

(30)

710

(160)

142

(32)

730

(164)

146

(33)

2000 rpm

N

(lbf)

520

(117)

104

(23)

560

(126)

112

(25)

580

(130)

116

(26)

3000 rpm

N

(lbf)

460

(103)

92

(21)

490

(110)

98

(22)

510

(115)

102

(23)

4000 rpm

N

(lbf)

410

(92)

82

(18)

450

(101)

90

(20)

460

(103)

92

(21)

5000 rpm

N

(lbf)

380

(85)

76

(17)

410

(92)

82

(18)

430

(97)

86

(19)

6000 rpm

N

(lbf)

360

(81)

72

(16)

390

(88)

78

(18)

400

(90)

80

(18)

The following tables show the maximum radial shaft load FR and the maximum axial shaft load FA for SH3100:

Speed of rotation

Unit

Value

SH31001

SH31002

SH31003

SH31004

FR

FA

FR

FA

FR

FA

FR

FA

1000 rpm

N

(lbf)

900

(202)

180

(40)

990

(223)

198

(45)

1050

(236)

210

(47)

1070

(241)

214

(48)

2000 rpm

N

(lbf)

720

(162)

144

(32)

790

(178)

158

(36)

830

(187)

166

(37)

850

(191)

170

(38)

3000 rpm

N

(lbf)

630

(142)

126

(28)

690

(155)

138

(31)

730

(164)

146

(33)

740

(166)

148

(33)

4000 rpm

N

(lbf)

570

(128)

114

(26)

620

(139)

124

(28)

660

(148)

132

(30)

-

-

5000 rpm

N

(lbf)

530

(119)

106

(24)

-

-

-

-

-

-

The following tables show the maximum radial shaft load FR and the maximum axial shaft load FA for SH3140:

Speed of rotation

Unit

Value

SH31401

SH31402

SH31403

SH31404

FR

FA

FR

FA

FR

FA

FR

FA

1000 rpm

N

(lbf)

1930

(434)

386

(87)

2240

(504)

448

(101)

2420

(544)

484

(109)

2660

(598)

532

(120)

2000 rpm

N

(lbf)

1530

(344)

306

(69)

1780

(400)

356

(80)

1920

(432)

384

(86)

2110

(474)

422

(95)

3000 rpm

N

(lbf)

1340

(301)

268

(60)

1550

(348)

310

(70)

1670

(375)

334

(75)

1840

(414)

368

(83)

The following tables show the maximum radial shaft load FR and the maximum axial shaft load FA for SH3205:

Speed of rotation

Unit

Value

SH32051

SH32052

SH32053

FR

FA

FR

FA

FR

FA

1000 rpm

N

(lbf)

3730

(839)

746

(168)

4200

(944)

840

(189)

4500

(1012)

900

(202)

2000 rpm

N

(lbf)

2960

(665)

592

(133)

3330

(749)

666

(150)

3570

(803)

714

(161)

3000 rpm

N

(lbf)

2580

(580)

516

(116)

2910

(654)

582

(131)

3120

(701)

624

(140)

0198441113987.07

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Schneider Electric.

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