Bevel and Mitre Gears0 pages

Bevel and Mitre Gears
Design and Selection

The power steel bevel gears can transmit under ideal lubrication
conditions is normally limited by wear life. The following tables
give design power in kW for a normal operating life of 10,000
hours for stock gears. For increased life gears can be induction
hardened.

Interchangeability

1.

From details of Driver and Driven equipment select correct
Service Factor from table below.
2. Calculate Design Power kW
Design Power = Actual Power Service factor.
3. If Drive ratio not available determine from
R.P High Speed Shaft
.M.
Ratio =
R.P Low Speed Shaft
.M.
4. From table for Drive Ratio (i.e. 1:1 Mitre Gear, 1.5:1 to 4:1
Bevel Gears), select smallest gearset where Power equals or
exceeds Design power at Pinion R.P For variable speed
.M.
drives check selection at max. shaft speed, torque and power.
For useful formulae on Bevel Gears design refer to appendix
pages.

Installation

All mitre and bevel gears develop end thrust which must be
counteracted by bearings of adequate capacity. Accurate and rigid
mounting of both gear and pinion provide quiet operation and
long life. Bearing spacing and shaft stiffness should be selected to
keep shaft deflection below .025mm.

Lubrication

Grease lubrication can be adequate for low speed applications but
oil splash lubrication is always preferable. The oil level should
cover the face of the lower gear, and sufficient capacity should be
available to keep oil temperature below 95˚C.

Fax

Design Factors

Efficiency

Character of Load of Driven Equipment
Power Source

Uniform

Power Rating Tables Standard Metric Mitre Gears

Heavy
Shock

1.00
1.25
1.50

Uniform
Light Impulse
Heavy Impulse

Moderate
Shock
1.25
1.50
1.75

1.75
2.00
2.25

For speed increase drives add 0.1 to above factors.

50

100

200

300

400

500

600

800

1000

1200

1500

2000

3000

M1016
M1019
M1022
M1026
M1030
M1516
M1519
M1522
M1526
M1530
M2016
M2019
M2022
M2026
M2030
M2516
M2519
M2522
M2526
M2530
M3016
M3019
M3022
M3026
M3030
M3516
M3519
M3522
M3526
M3530
M4016
M4019
M4022
M4026
M4030
M4516
M4519
M4522
M4526
M4530
M5016
M5019
M5022
M5026
M5030

.001
.001
.002
.004
.006
.003
.005
.007
.012
.019
.006
.010
.016
.028
.042
0.01
0.02
0.03
0.05
0.07
0.02
0.03
0.05
0.08
0.13
0.03
0.05
0.07
0.13
0.20
0.04
0.07
0.11
0.20
0.29
0.06
0.10
0.16
0.26
0.40
0.07
0.13
0.21
0.35
0.54

.003
.005
.008
.014
.021
.010
.017
.027
.043
.069
.022
.038
.060
.101
.152
0.04
0.07
0.11
0.19
0.28
0.07
0.11
0.18
0.30
0.46
0.10
0.17
0.28
0.47
0.73
0.15
0.26
0.41
0.72
1.06
0.21
0.36
0.57
0.93
1.46
0.27
0.48
0.76
1.29
1.96

.005
.009
.015
.025
.038
.017
.030
.048
.078
.123
.039
.068
.107
.180
.272
0.07
0.12
0.19
0.33
0.50
0.12
0.21
0.33
0.54
0.83
0.19
0.31
0.50
0.84
1.31
0.26
0.47
0.74
1.28
1.89
0.37
0.65
1.02
1.67
2.62
0.48
0.87
1.36
2.30
3.50

.010
.016
.026
.044
.069
.031
.055
.085
.139
.220
.070
.121
.191
.322
.485
0.13
0.22
0.35
0.60
0.89
0.22
0.37
0.59
0.97
1.48
0.34
0.56
.090
1.50
2.34
0.47
0.84
1.33
2.29
3.38
0.67
1.16
1.83
2.99
4.67
0.87
1.55
2.43
4.12
6.25

.014
.023
.037
.062
.096
.044
.077
.119
.195
.308
.099
.169
.267
.451
.680
0.18
0.31
0.49
0.84
1.25
0.30
0.51
0.83
1.36
2.08
0.47
0.79
1.26
2.10
3.27
0.66
1.18
1.86
3.20
4.73
0.94
1.63
2.56
4.19
6.54
1.22
2.17
3.40
5.76
8.75

.018
.029
.046
.078
.121
.055
.097
.150
.215
.387
.124
.212
.336
.567
.854
0.23
0.39
0.61
1.05
1.58
0.38
0.65
1.05
1.71
2.62
0.59
0.99
1.58
2.64
4.11
0.83
1.48
2.34
4.03
5.95
1.18
2.04
3.21
5.26
8.22
1.53
2.73
4.27
7.24
11.00

.021
.034
.055
.093
.145
.066
.115
.179
.293
.462
.148
.253
.401
.676
1.019
0.27
0.47
0.73
1.26
1.88
0.46
0.77
1.25
2.04
3.12
0.71
1.18
1.89
3.15
4.91
1.00
1.76
2.79
4.80
7.10
1.41
2.44
3.84
6.28
9.81
1.83
3.26
5.10
8.64
13.13

.025
.040
.066
.110
.171
.078
.136
.211
.346
.545
.175
.299
.474
.799
1.204
0.33
0.55
0.86
1.48
2.23
0.54
0.91
1.47
2.41
3.69
0.84
1.40
2.23
3.73
5.80
1.18
2.09
3.29
5.67
8.38
1.67
2.88
4.53
7.42
11.59
2.16
3.85
6.02
10.21
15.51

.030
.049
.079
.133
.206
.094
.164
.255
.417
.657
.210
.360
.570
.962
1.450
0.39
0.66
1.04
1.79
2.68
0.65
1.10
1.77
2.90
4.44
1.01
1.69
2.69
4.49
6.98
1.42
2.51
3.97
6.83
10.10
2.01
3.47
5.46
8.93
13.96
2.60
4.63
7.25
12.30
18.67

.037
.060
.097
.163
.253
.115
.201
.313
.512
.806
.258
.442
.700
1.181
1.780
0.48
0.81
1.28
2.20
3.29
0.80
1.35
2.18
3.56
5.45
1.24
2.07
3.30
5.51
8.57
1.74
3.08
4.87
8.39
12.40
2.47
4.26
6.70
10.97
17.14
3.19
5.69
8.90
15.09
22.93

.044
.070
.114
.192
.298
.136
.237
.368
.603
.950
.304
.521
.825
1.392
2.097
0.57
0.96
1.50
2.59
3.88
0.95
1.59
2.57
4.20
6.42
1.46
2.44
3.89
6.49
10.10
2.05
3.63
5.74
9.89
14.60
2.91
5.02
7.90
12.92
20.19
3.76
6.70
10.49
17.78
27.01

.052
.083
.135
.227
.352
.161
.280
.435
.712
1.122
.359
.616
.974
1.643
2.475
0.67
1.14
1.78
3.06
4.58
1.12
1.88
3.03
4.96
7.58
1.72
2.88
4.59
7.66
11.92
2.42
4.29
6.77
11.67
17.24
3.44
5.93
9.32
15.25

.063
.100
.164
.275
.427
.195
.340
.528
.863
1.361
.436
.747
1.182
1.993
3.003
0.81
1.38
2.15
3.71
5.55
1.35
2.28
3.68
6.01
9.20
2.09
3.49
5.57
9.30

.085
.137
.222
.374
.580
.264
.462
.717
1.172
1.848
.592
1.014
1.605
2.706
4.077
1.10
1.87
2.93

2.94
5.20
8.22

4.00

4.44
7.92
12.38

5.39
9.11

Gear Speed R.P
.M.

1.84
3.10

2.84

4.17
7.19

Selections in tinted area have pitch line velocity over 5 m/s. For these selections it is recommended teeth are induction hardened.

3

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Gear Set
Catalogue
No.

+44 121 325 1079

When correctly aligned, a bevel gearset with oil lubrication can
operate with transmission efficiency up to 98 per cent.

+44 121 360 0155

For correct selection of a Bevel Gearset first assemble application
data, including Power, shaft speeds and drive ratio required.

Bevel gears of identical pitch and teeth but from different drive
ratio gearsets are not interchangeable. All bevel gears are
generated on the pitch cone radius which varies with the ratio of
gears within a given diametral pitch.

Te l

Bevel and Mitre Gears are used to transmit power between shafts
intersecting at 90˚, on low speed, high torque applications where
pitch line velocity does not exceed 5 m/s. All Cross+Morse gears
are cut to the Gleason System to provide equal strength between
pinion and gear.