Metric Spur Gears and Metric Spur Gear Sizes

Metric Spur Gears and Metric Spur Gear Sizes

Metric spur gears are manufactured to precise ISO and DIN dimensional standards and are available in modules 1 through 8. Our premium precision gears are manufactured from high-strength C45 steel, are designed with a 20° pressure angle, and are available in plate style or b-hub (hub on one side) style. Our metric spur gears are supplied as plain stock bores, but we can also supply machine-finished bores with a key-way and set screw upon request. Typical applications where metric spur gears are found include machine tools, heavy machinery, packaging equipment, lifts, positioning equipment, robotics, linear control equipment, and more! When it comes to spur gears, in general, a wide range of parameters influence the selection of gear size for the application. Possible application conditions and proper gear selection will yield the best outcome for production and gear life. For additional information or to get a quote on our metric spur gears, don't hesitate to contact our customer support team; we will be happy to assist you!
metric spur gear figure
One of the most important factors to consider is the gear tooth strength, which is known as the bending strength of the tooth that is allowed by the stress as the tooth root is under load from the mating geat. Additionally, the service factor, which is comprised of the lubrication, speeds, and noise considerations, additional details of this will be listed below. Another important factor is the surface durability of the metric spur gear, which is the allowable tangential force transmitted safely at the pitch circle. Utilization of gear oil and lubrication to the working gears in a system can greatly increase the working life and even overall performance of the gear; it is important to select lubrication for the specific application's requirements properly. Surface speed is also an important factor when selecting gears. Unlike enclosed gears that are typically flooded in a lubricant, open gears are more prone to contamination and less lubrication. Additional factors that should be considered are operating temperatures, moisture, gear alignment, duty cycle, and application shock loads. As speeds increase, whether on maintaining circular gears for rotational motion or for gear racks and pinion gears that create linear motion, higher speeds may require ground gears for a more precise and quiet movement. A precision fitment may be required when setting the gears to minimize the backsplash (the space between the non-contact side of the mating gear teeth). Often, experience can also play an important role, especially when evaluating possible design improvements in a system. It's important to consider the existing application or applications and the individual results you are getting versus what you are expecting in terms of tooth wear and overall life. The toothwear can be a good place to observe similar applications.

Metric Spur Gear Nomenclature

metric spur gear sizes
Metric spur gear nomenclature is fairly standard across all manufacturers; the above breakdown shows the standard part numbering system; however, if you have a metric gear with a different part # type, please contact us for the crossover. Additionally, our gears come standard as a 1045 steel material, but they are also available in stainless steel and plastic.

Metric Spur Gear Terms

metric spur gear and rackmetric spur gear terms
The terms below are commonly used throughout the industry regarding metric and standard spur gears.
  • Addendum: The height of the tooth was measured above the pitch circle.
  • Backlash: The play (distance) between mating teeth at the pitch circle.
  • Center Distance: The distance between the center of the mating gear.
  • Circular Pitch: Arc length of the pitch circle between the center of other corresponding points of the adjacent teeth. Circular pitch = 3.14159/ diametral pitch.
  • Clearance: The radial distance or separation between the top of one tooth and the bottom of the mating tooth space.
  • Crown: The face of each gear tooth has a slight outward bulge and is thinner on each end. This feature helps accommodate slight misalignments of gear teeth or shafts on which they are mounted.
  • Dedendum: the depth of the tooth measured below the pitch circle.
  • Diametral Pitch: The ratio of the number of teeth to the number of inches of the pitch diameter. Diametral pitch = 3.14159/ circular pitch.
  • External Gears: Gears with teeth that are cut on the outside.
  • Face Width: The axial tooth length.
  • Tooth Flank: the gear tooth's working, or contacting, side.
  • Gear Center: The center of the pitch circle of the gear.
  • Gear ratio: The ratio of the number of teeth in the driven gear sets. Typically, it is the number of teeth in the driven gear divided by the number of teeth in the driving gear.
  • Line of Centers: Connects the centers of the pitch circles of two mating gears.
  • Outside Diameter: This term applies to external gears and is the distance from the top of one tooth to the top of another tooth on the opposite side of the gear that is measured through the axis of the gear. Outside diameter = number of teeth +2 / diametral pitch.
  • Pitch: The distance between similar, equally spaced tooth surfaces along a given line or curve.
  • Pitch Circle: Circle where mating gear contact occurs. Pitch circles are tangent in mating gears.
  • Pitch Diameter: The diameter of the pitch circle. Pitch diameter = number of teeth/ diametral pitch.
  • Point of Contact: Any point where two tooth profiles on gears touch each other.
  • Pressure Angle: The angle between a tangent to the tooth profile and a line perpendicular to the pitch surface. Standard metric spur gears are 14.5° or 20° pressure angled.
  • Root Diameter: The distance from the bottom of one tooth to the bottom of a tooth is measured through the axis of the gear.
  • Tooth Thickness: The thickness of a tooth at the pitch circle.
  • Tooth Surface Aera: The contact sides or faces of a gear tooth or the area, including the tooth face and tooth flank.
  • Shaft Angle: The angle between the axis of two non-parallel gear shafts. This is often referred to as misalignment.
  • Spur Gears: Gears with straight teeth that are always parallel to the axis of rotation.

Metric Spur Gear Formulas and Criteria

The information below is intended to guide gear selection. It's important to know that there can be many factors in selecting the right and exact gear to match expectations. For the basic loading guide, the rolling stress load on the tooth σ=589N/mm^2 and allowable bending stress σ=200N/mm^2.
Gear Strength: to choose the metric spur gear based on the strength of the gear, you need to get the permissible bending strength of the gear, which is referred to as the allowable tangential force at the pitch circle and relates to the allowable load on the tooth and resulting bending stress in the root of the tooth under load.
Surface Durability is the safe force on the tooth without any occurrence of surface failures. Lubrication will be an important consideration for the teeth that mesh to keep working surfaces lubricated. The speed of the gears in the mesh will also play a role as will the type of lubrication used.
Selection is the next step that needs to be taken; this should be made based on the torque load of the application. The allowable torque for each gear is listed on the charts below and on the product pages themselves. Different manufacturers may use different loading criteria for loading based on service factors and material stress levels; the published torque ratings are intended as a guide.
Gear Size is generally proportional to the load capacity; a hardened gear will have more load capacity but less flexibility for absorbing or allowing shock loads and other application requirements. Ground gears will also improve positioning accuracy.
Load or service factors for external dynamic loads will also influence the operation and life of the gear. The below service factors that can be applied to the load will help extend the service life.
Lubrication: Less than 0.5m/s grease will suffice for peripheral speeds, but speeds over 0.5m/s oil should be considered. Safety factors should also be considered for safe working loads.
Speeds: C45 (1045) metric milled spur gears (un-ground) can be applied at rim speeds up to 12 m/s; in comparison, ground gears can be applied to 25 m/s. Hardened milled gears usually have a maximum limit of 8 m/s due to tooth distortion from the tooth hardening process; consider multiple stages of gear sets for high reductions.
Noise Consideration: Milled gears are the quietest when held at five m/s rim speed, and ground gears are typically suggested for more continuous operation, primarily for minimizing noise. Also, manual drives and pinions with 8-12 teeth can be used for low-speed applications. For gears that require higher demands, 25 teeth or more should be used.
Service Factors:
metric spur gear factors
Conversion Factors:
metric spur gear conversions
Selection Formulas (Metric & Inch Units)
metric spur gear notes
metric spur gear formulas

Metric Spur Gear Sizes

The charts below show our standard metric spur gear sizes and dimensions; for custom metric spur gears, quotes, or additional information, please contact us.

Module 1 Metric Spur Gear Sizes

module 1 metric spur gear sizes
Note: Dimension h = 15mm, Dimension H = 25mm
Tooth Count B-Type Part # A-Type Part # De (mm) Dp (mm) d (mm) D (mm) Max Torque (Ncm) Weight (kG)
12 M1B12 -- 14 12 9 5 35 0.01
13 M1B13 -- 15 13 10 5 40 0.02
14 M1B14 -- 16 14 10 5 45 0.02
15 M1B15 -- 17 15 12 6 49 0.02
16 M1B16 -- 18 16 13 6 53 0.03
17 M1B17 -- 19 17 14 8 55 0.03
18 M1B18 -- 20 18 15 8 62 00.3
19 M1B19 -- 21 19 15 8 72 0.04
20 M1B20 -- 22 20 16 8 81 0.40
21 M1B21 -- 23 21 16 8 91 0.05
22 M1B22 -- 24 22 18 8 101 0.05
23 M1B23 -- 25 23 18 8 112 0.06
24 M1B24 -- 26 24 20 8 125 0.06
25 M1B25 -- 27 25 20 8 136 0.07
26 M1B26 -- 28 26 20 8 150 0.07
27 M1B27 -- 29 27 20 8 164 0.08
28 M1B28 -- 30 28 20 8 177 0.08
29 M1B29 -- 31 29 20 8 195 0.09
30 M1B30 -- 32 30 20 8 209 0.09
31 M1B31 -- 33 31 25 10 224 0.11
32 M1B32 -- 34 32 25 10 243 0.12
33 M1B33 -- 35 33 25 10 262 0.12
34 M1B34 -- 36 34 25 10 279 0.13
35 M1B35 -- 37 35 25 10 299 0.14
36 M1B36 -- 38 36 25 10 318 0.14
37 M1B37 -- 39 37 25 10 329 0.15
38 M1B38 -- 40 38 25 10 364 0.16
39 M1B39 -- 41 39 25 10 385 0.16
40 M1B40 -- 42 40 25 10 409 0.17
41 M1B41 -- 43 41 30 10 436 0.19
42 M1B42 -- 44 42 30 10 459 0.20
43 M1B43 -- 45 43 30 10 486 0.21
44 M1B44 -- 46 44 30 10 511 0.22
45 M1B45 -- 47 45 30 10 538 0.23
46 M1B46 -- 48 46 30 10 566 0.23
47 M1B47 -- 49 47 30 10 602 0.24
48 M1B48 -- 50 48 30 10 642 0.25
49 M1B49 -- 51 49 30 10 682 0.26
50 M1B50 -- 52 50 30 12 725 0.26
51 M1B51 -- 53 51 40 12 769 0.32
52 M1B52 -- 54 52 40 12 818 0.33
53 M1B53 -- 55 53 40 12 843 0.33
54 M1B54 -- 56 54 40 12 893 0.34
55 M1B55 -- 57 55 40 12 934 0.36
56 M1B56 -- 58 56 40 12 972 0.37
57 M1B57 -- 59 57 40 12 1013 0.38
58 M1B58 -- 60 58 40 12 1054 0.39
59 M1B59 -- 61 59 40 12 1101 0.40
60 M1B60 M1A60 62 60 40 12 1146 0.41
61 M1B61 -- 63 61 50 12 1196 0.47
62 M1B62 -- 64 62 50 12 1265 0.49
63 M1B63 -- 65 63 50 12 1330 0.50
64 M1B64 -- 66 64 50 12 1395 0.51
65 M1B65 -- 67 65 50 12 1459 0.52
66 M1B66 -- 68 66 50 12 1503 0.53
67 M1B67 -- 69 67 50 12 1548 0.55
68 M1B68 -- 70 68 50 12 1592 0.56
69 M1B69 -- 71 69 50 12 1630 0.57
70 M1B70 M1A70 72 70 50 12 1665 0.58
72 M1B72 M1A72 74 72 50 12 1729 0.65
75 M1B75 M1A75 77 75 50 12 1838 0.73
76 M1B76 M1A76 78 76 50 12 1872 0.75
80 M1B80 M1A80 82 80 50 12 2030 0.80
85 -- M1A85 87 85 -- 12 2230 0.73
90 M1B90 M1A90 92 90 50 12 2450 0.85
95 -- M1A95 97 95 -- 12 2660 0.82
100 M1B100 M1A100 102 100 60 12
 2890 0.90
110 -- M1A110 112 110 -- 12 3710 0.91
114 -- M1A114 116 114 -- 12 3820 1.00
120 -- M1A120 122 120 -- 12 4000 1.32
127 -- M1A127 129 127 -- 12 4200 1.47

Module 1.5 Metric Spur Gear Sizes

module 1.5 metric spur gear sizes
Note: Dimension h = 17mm, Dimension H = 30mm
Tooth Count B-Type Part # A-Type Part # De (mm) Dp (mm) d (mm) D (mm) Max Torque (Ncm) Weight (kG)
12 M1.5B12 -- 21.0 18.0 14 8 114 .05
13 M1.5B13 -- 22.5 19.5 14 8 130 .05
14 M1.5B14 -- 24.0 21.0 18 8 146 .06
15 M1.5B15 -- 25.5 22.5 18 8 158 .07
16 M1.5B16 -- 27.0 24.0 20 8 171 .08
17 M1.5B17 -- 28.5 25.5 20 8 179 .09
18 M1.5B18 -- 30.0 27.0 20 8 199 0.10
19 M1.5B19 -- 31.5 28.5 20 8 231 0.10
20 M1.5B20 -- 33.0 30.0 25 8 260 0.13
21 M1.5B21 -- 34.5 31.5 25 10 292 0.13
22 M1.5B22 -- 36.0 33.0 25 10 325 0.14
23 M1.5B23 -- 37.5 34.5 25 10 361 0.16
24 M1.5B24 -- 39.0 36.0 25 10 402 0.17
25 M1.5B25 -- 40.5 37.5 25 10 438 0.18
26 M1.5B26 -- 42.0 39.0 30 12 483 0.20
27 M1.5B27 -- 43.5 40.5 30 12 528 0.22
28 M1.5B28 -- 45.0 42.0 30 12 572 0.23
29 M1.5B29 -- 46.5 43.5 30 12 629 0.24
30 M1.5B30 -- 48.0 45.0 30 12 674 0.26
31 M1.5B31 -- 49.5 46.3 35 12 723 0.30
32 M1.5B32 -- 51.0 48.0 35 12 784 0.31
33 M1.5B33 -- 52.5 49.5 35 12 844 0.33
34 M1.5B34 -- 54.0 51.0 35 12 901 0.34
35 M1.5B35 -- 55.5 52.5 35 12 966 0.36
36 M1.5B36 -- 57.0 54.0 35 12 1027 0.37
37 M1.5B37 -- 58.5 55.5 40 12 1060 0.42
38 M1.5B38 -- 60.0 57.0 40 12 1173 0.44
39 M1.5B39 -- 61.5 58.5 40 12 1242 0.46
40 M1.5B40 -- 63.0 60.0 40 12 1320 0.48
41 M1.5B41 -- 64.5 61.5 50 14 1405 0.50
42 M1.5B42 -- 66.0 63.0 50 14 1482 0.59
43 M1.5B43 -- 67.5 64.5 50 14 1567 0.61
44 M1.5B44 -- 69.0 66.0 50 14 1648 0.63
45 M1.5B45 -- 70.5 67.5 50 14 1734 0.65
46 M1.5B46 -- 72.0 69.0 50 14 1827 0.66
47 M1.5B47 -- 73.5 70.5 50 14 1941 0.70
48 M1.5B48 -- 75.0 72.0 50 14 2071 0.70
49 M1.5B49 -- 76.5 73.5 50 14 2200 0.73
50 M1.5B50 -- 78.0 75.0 50 14 2339 0.76
51 M1.5B51 -- 79.5 76.5 60 15 2480 0.86
52 M1.5B52 -- 81.0 78.0 60 15 2640 0.89
53 M1.5B53 -- 82.5 79.5 60 15 2720 0.91
54 M1.5B54 -- 84.0 81.0 60 15 2882 0.94
55 M1.5B55 -- 85.5 82.5 60 15 3014 0.96
56 M1.5B56 -- 87.0 84.0 60 15 3135 0.98
57 M1.5B57 -- 88.5 85.5 60 15 3267 1.00
58 M1.5B58 -- 90.0 87.0 60 15 3399 1.03
59 M1.5B59 -- 91.5 88.5 60 15 3551 1.06
60 M1.5B60 -- 93.0 90.0 60 15 3696 1.09
61 M1.5B61 -- 94.5 91.5 70 20 3858 1.22
62 M1.5B62 -- 96.0 93.0 70 20 4081 1.25
63 M1.5B63 -- 97.5 94.5 70 20 4290 1.28
64 M1.5B64 -- 99.0 96.0 70 20 4499 1.31
65 M1.5B65 -- 100.5 97.5 70 20 4708 1.34
66 M1.5B66 -- 102.0 99.0 70 20 4848 1.37
67 M1.5B67 -- 103.5 100.5 70 20 4993 1.40
68 M1.5B68 -- 105.0 102.0 70 20 5137 1.43
69 M1.5B69 -- 106.5 103.5 70 20 5257 1.46
70 M1.5B70 -- 108.0 105.0 70 20 5370 1.50
72 M1.5B72 M1.5A72 111.0 108.0 80 20 5577 1.19
75 -- M1.5A75 115.5 112.5 -- 20 5929 1.30
76 -- M1.5A76 117.0 114.0 -- 20 6039 1.33
80 -- M1.5A80 123.0 120.0 -- 20 6512 1.48
85 -- M1.5A85 130.5 127.5 -- 20 8063 1.67
90 -- M1.5A90 138.0 135.0 -- 20 8481 1.88
95 -- M1.5A95 145.5 142.5 -- 20 8888 2.09
100 -- M1.5A100 153.0 150.0 -- 20 9218 2.32
110 -- M1.5A110 168.0 165.0 -- 20 9416 2.82
114 -- M1.5A114 174.0 171.0 -- 20 9620 3.03
120 -- M1.5A120 183.0 180.0 -- 20 10076 3.36
127 -- M1.5A127 193.5 190.5 -- 20 10705 3.77

Module 2 Metric Spur Gear Sizes

module 2 metric spur gear sizes
Note: Dimension h = 20mm, Dimension H = 35mm
Tooth Count B-Type Part # A-Type Part # De (mm) Dp (mm) d (mm) D (mm) Max Torque (Ncm) Weight (kG)
12 M2B12 -- 28 24 18 10 2.8 0.08
13 M2B13 -- 30 26 19 10 3.2 0.10
14 M2B14 -- 32 28 20 10 3.6 0.12
15 M2B15 -- 34 30 22 10 3.9 0.14
16 M2B16 -- 36 32 24 10 4.2 0.16
17 M2B17 -- 38 34 25 10 4.4 0.18
18 M2B18 -- 40 36 25 10 4.9 0.19
19 M2B19 -- 42 38 25 10 5.7 0.21
20 M2B20 -- 44 40 30 12 6.4 0.26
21 M2B21 -- 46 42 30 12 7.2 0.27
22 M2B22 -- 48 44 30 12 8.0 0.29
23 M2B23 -- 50 46 30 12 8.9 0.31
24 M2B24 -- 52 48 35 12 9.9 0.36
25 M2B25 -- 54 50 35 12 10.8 0.39
26 M2B26 -- 56 52 40 12 11.9 0.45
27 M2B27 -- 58 54 40 14 13.0 0.47
28 M2B28 -- 60 56 40 14 14.1 0.50
29 M2B29 -- 62 58 40 14 15.5 0.52
30 M2B30 -- 64 60 40 14 16.4 0.55
31 M2B31 -- 66 62 45 14 17.8 0.61
32 M2B32 -- 68 64 45 14 19.3 0.65
33 M2B33 -- 70 66 45 14 20.8 0.68
34 M2B34 -- 72 68 45 14 22.2 0.71
35 M2B35 -- 74 70 45 14 23.8 0.74
36 M2B36 -- 76 72 45 14 25.3 0.78
37 M2B37 -- 78 74 50 14 26.1 0.86
38 M2B38 -- 80 76 50 14 28.9 0.90
39 M2B39 -- 82 78 50 14 30.6 0.93
40 M2B40 -- 84 80 50 14 32.5 0.97
41 M2B41 -- 86 82 60 16 34.6 1.05
42 M2B42 -- 88 84 60 16 36.5 1.09
43 M2B43 -- 90 86 60 16 38.6 1.13
44 M2B44 -- 92 88 60 16 40.6 1.23
45 M2B45 -- 94 90 60 16 42.7 1.27
46 M2B46 -- 96 92 60 16 45.0 1.31
47 M2B47 -- 98 94 60 16 47.8 1.48
48 M2B48 -- 100 96 70 16 51.0 1.53
49 M2B49 -- 102 98 70 16 54.2 1.57
50 M2B50 -- 104 100 70 16 57.6 1.62
51 M2B51 -- 106 102 70 20 61.1 1.67
52 M2B52 -- 108 104 70 20 64.8 1.72
53 M2B53 -- 110 106 70 20 68.5 1.78
54 M2B54 -- 112 108 70 20 72.4 1.83
55 M2B55 -- 114 110 70 20 76.3 1.88
56 M2B56 -- 116 112 70 20 80.5 1.94
57 M2B57 -- 118 114 70 20 84.7 1.99
58 M2B58 -- 120 116 70 20 89.0 2.05
59 M2B59 -- 122 118 70 20 93.1 2.11
60 M2B60 -- 124 120 70 20 97.3 2.16
61 M2B61 -- 126 122 80 20 102.0 2.36
62 M2B62 -- 128 124 80 20 107.0 2.42
63 M2B63 -- 130 126 80 20 111.0 2.48
64 M2B64 -- 132 128 80 20 114.0 2.55
65 M2B65 -- 134 130 80 20 117.0 2.61
66 M2B66 -- 136 132 80 20 120.0 2.67
67 M2B67 -- 138 134 80 20 122.0 2.74
68 M2B68 -- 140 136 80 20 125.0 2.81
69 M2B69 -- 142 138 80 20 127.0 2.87
70 M2B70 -- 144 140 80 20 130.0 2.94
72 M2B72 M2A72 148 144 80 20 135.0 2.50
75 -- M2A75 154 150 -- 20 166.0 2.71
76 -- M2A76 156 152 -- 20 168.0 2.79
80 -- M2A80 164 160 -- 20 175.0 3.09
85 -- M2A85 174 170 -- 20 179.0 3.50
90 -- M2A90 184 180 -- 20 180.0 3.93
95 -- M2A95 194 190 -- 20 181.0 4.39
100 -- M2A100 204 200 -- 20 185.0 4.87
110 -- M2A110 224 220 -- 20 201.0 5.90
114 -- M2A114 232 228 -- 20 208.0 6.34
120 -- M2A120 244 240 -- 20 217.0 7.03
127 -- M2A127 258 254 -- 20 235.0 7.89

Module 2.5 Metric Spur Gear Sizes

module 2.5 metric spur gear sizes
Note: Dimension h = 25mm, Dimension H = 40mm
Tooth Count B-Type Part # A-Type Part # De (mm) Dp (mm) d (mm) D (mm) Max Torque (Ncm) Weight (kG)
12 M2.5B12 -- 35.0 30.0 22 10 5.9 0.17
13 M2.5B13 -- 37.5 32.5 25 10 6.7 0.21
14 M2.5B14 -- 40.0 35.0 28 10 7.6 0.25
15 M2.5B15 -- 42.5 37.5 30 10 8.3 0.30
16 M2.5B16 -- 45.0 40.0 32 12 8.9 0.33
17 M2.5B17 -- 47.5 42.5 35 12 9.2 0.38
18 M2.5B18 -- 50.0 45.0 35 12 10.4 0.42
19 M2.5B19 -- 52.5 47.5 35 12 11.9 0.45
20 M2.5B20 -- 55.0 50.0 40 14 13.4 0.54
21 M2.5B21 -- 57.5 52.5 40 14 15.1 0.56
22 M2.5B22 -- 60.0 55.0 45 14 16.9 0.66
23 M2.5B23 -- 62.5 57.5 45 14 18.7 0.70
24 M2.5B24 -- 65.0 60.0 45 14 20.8 0.74
25 M2.5B25 -- 67.5 62.5 50 14 22.8 0.85
26 M2.5B26 -- 70.0 65.0 50 14 25.0 0.90
27 M2.5B27 -- 72.5 67.5 50 14 27.3 0.95
28 M2.5B28 -- 75.0 70.0 50 14 29.6 1.00
29 M2.5B29 -- 77.5 72.5 50 14 32.7 1.06
30 M2.5B30 -- 80.0 75.0 55 16 34.9 1.18
31 M2.5B31 -- 82.5 77.5 55 16 37.5 1.22
32 M2.5B32 -- 85.0 80.0 55 16 40.6 1.28
33 M2.5B33 -- 87.5 82.5 55 16 43.8 1.34
34 M2.5B34 -- 90.0 85.0 55 16 46.7 1.41
35 M2.5B35 -- 92.5 87.5 60 16 50.2 1.54
36 M2.5B36 -- 95.0 90.0 60 16 53.3 1.61
37 M2.5B37 -- 97.5 92.5 60 16 54.9 1.68
38 M2.5B38 -- 100.0 95.0 60 16 60.8 1.75
39 M2.5B39 -- 102.5 97.5 60 16 65.3 1.83
40 M2.5B40 -- 105.0 100.0 70 20 71.2 2.06
41 M2.5B41 -- 107.5 102.5 70 20 77.4 2.14
42 M2.5B42 -- 110.0 105.0 70 20 82.2 2.22
43 M2.5B43 -- 112.5 107.5 70 20 92.4 2.30
44 M2.5B44 -- 115.0 110.0 70 20 96.6 2.38
45 M2.5B45 -- 117.5 112.5 70 20 100.0 2.47
46 M2.5B46 -- 120.0 115.0 70 20 107.0 2.52
47 M2.5B47 -- 122.5 117.5 80 20 114.0 2.80
48 M2.5B48 -- 125.0 120.0 80 20 120.0 2.88
49 M2.5B49 -- 127.5 122.5 80 20 128.0 2.98
50 M2.5B50 -- 130.0 125.0 80 20 135.0 3.07
51 M2.5B51 -- 132.5 127.5 80 20 143.0 3.17
52 M2.5B52 -- 135.0 130.0 90 20 149.0 3.48
53 M2.5B53 -- 137.5 132.5 90 20 156.0 3.58
54 M2.5B54 -- 140.0 135.0 90 20 165.0 3.68
55 M2.5B55 -- 142.5 137.5 90 20 173.0 3.78
56 M2.5B56 -- 145.0 140.0 100 20 181.0 4.13
57 M2.5B57 -- 147.5 142.5 100 20 190.0 4.23
58 M2.5B58 -- 150.0 145.0 100 20 199.0 4.34
59 M2.5B59 -- 152.5 147.5 100 20 208.0 4.46
60 M2.5B60 -- 155.0 150.0 100 20 217.0 4.57
62 M2.5B62 -- 160.0 155.0 100 20 240.0 4.59
63 M2.5B63 -- 162.5 157.5 100 20 260.0 4.60
65 M2.5B65 M2.5A65 167.5 162.5 100 20 286.0 3.99
67 M2.5B67 -- 172.5 167.5 100 20 295.0 4.61
70 M2.5B70 M2.5A70 180.0 175.0 100 20 324.0 4.64
72 -- M2.5A72 185.0 180.0 -- 20 332.0 4.91
75 -- M2.5A75 192.5 187.5 -- 20 338.0 5.33
76 -- M2.5A76 195.0 190.0 -- 20 340.0 5.48
80 -- M2.5A80 205.0 200.0 -- 25 342.0 6.04
85 -- M2.5A85 217.5 212.5 -- 25 346.0 6.84
90 -- M2.5A90 230.0 225.0 -- 25 348.0 7.68
95 -- M2.5A95 242.5 237.5 -- 25 361.0 8.57
100 -- M2.5A100 255.0 250.0 -- 25 378.0 9.51
110 -- M2.5A110 280.0 275.0 -- 25 408.0 11.53
114 -- M2.5A114 290.0 285.0 -- 25 419.0 12.39
120 -- M2.5A120 305.0 300.0 -- 25 438.0 13.74
127 -- M2.5A127 322.2 317.5 -- 25 453.0 15.40

Module 3 Metric Spur Gear Sizes

module 3 metric spur gear sizes
Note: Dimension h = 30mm, Dimension H = 50mm
Tooth Count B-Type Part # A-Type Part # De (mm) Dp (mm) d (mm) D (mm) Max Torque (Ncm) Weight (kG)
12 M3B12 -- 42 36 25 12 10.7 0.28
13 M3B13 -- 45 39 25 12 12.1 0.34
14 M3B14 -- 48 42 30 12 13.6 0.41
15 M3B15 -- 51 45 35 12 15.0 0.47
16 M3B16 -- 54 48 38 15 16.1 0.54
17 M3B17 -- 57 51 42 15 17.0 0.63
18 M3B18 -- 60 54 45 15 19.0 0.72
19 M3B19 -- 63 57 45 15 21.6 0.78
20 M3B20 -- 66 60 45 15 24.5 0.84
21 M3B21 -- 69 63 45 15 27.5 0.89
22 M3B22 -- 72 66 50 15 30.7 1.02
23 M3B23 -- 75 69 50 15 34.0 1.10
24 M3B24 -- 78 72 50 16 37.6
 1.18
25 M3B25 -- 81 75 60 16 41.4 1.39
26 M3B26 -- 84 78 60 16 45.4 1.48
27 M3B27 -- 87 81 60 16 49.7 1.56
28 M3B28 -- 90 84 60 16 54.1 1.66
29 M3B29 -- 93 87 60 16 59.2 1.75
30 M3B30 -- 96 90 60 16 63.5 1.85
31 M3B31 -- 99 93 70 20 69.2 1.95
32 M3B32 -- 102 96 70 20 74.6 2.21
33 M3B33 -- 105 99 70 20 82.8 2.32
34 M3B34 -- 108 102 70 20 88.6 2.43
35 M3B35 -- 111 105 70 20 97.8 2.55
36 M3B36 -- 114 108 70 20 106.0 2.62
37 M3B37 -- 117 111 80 20 115.0 2.74
38 M3B38 -- 120 114 80 20 124.0 3.05
39 M3B39 -- 123 117 80 20 135.0 3.18
40 M3B40 -- 126 120 80 20 143.0 3.31
41 M3B41 -- 129 123 90 20 155.0 3.44
42 M3B42 -- 132 126 90 20 164.0 3.58
43 M3B43 -- 135 129 90 20 175.0 3.72
44 M3B44 -- 138 132 90 20 186.0 4.07
45 M3B45 -- 141 135 90 20 196.0 4.22
46 M3B46 -- 144 138 90 20 207.0 4.37
47 M3B47 -- 147 141 90 20 220.0 4.76
48 M3B48 M3A48 150 144 100 20 232.0 4.92
49 M3B49 -- 153 147 100 20 240.0 5.10
50 M3B50 M3A50 156 150 100 20 258.0 5.20
52 -- M3A52 162 156 100 25 286.0 4.40
54 M3B54 -- 168 162 100 20 310.0 5.25
55 M3B55 M3A55 171 165 100 20 331.0 5.60
56 M3B56 -- 174 168 100 20 348.0 6.10
57 M3B57 M3A57 177 171 100 20 364.0 6.30
60 M3B60 M3A60 186 180 100 20 437.0 6.75
62 M3B62 -- 192 186 100 20 480.0 7.50
65 M3B65 M3A65 201 195 100 20 531.0 6.92
70 -- M3A70 216 210 -- 25 552.0 8.00
72 -- M3A72 222 216 -- 25 554.0 8.47
75 -- M3A75 231 225 -- 25 557.0 9.21
76 -- M3A76 234 228 -- 25 559.0 9.46
80 -- M3A80 246 240 -- 25 564.0 10.49
85 -- M3A85 261 255 -- 25 580.0 11.86
90 -- M3A90 276 270 -- 25 610.0 13.32
95 -- M3A95 291 285 -- 25 640.0 14.86
100 -- M3A100 306 300 -- 25 667.0 16.48
110 -- M3A110 336 330 -- 25 705.0 19.97
114 -- M3A114 348 342 -- 30 740.0 21.40
120 -- M3A120 366 360 -- 30 774.0 23.74
127 -- M3A127 387 381 -- 30 800.0 26.61

Module 4 Metric Spur Gear Sizes

module 4 metric spur gear sizes
Note: Dimension h = 40mm, Dimension H = 60mm
Tooth Count B-Type Part # A-Type Part # De (mm) Dp (mm) d (mm) D (mm) Max Torque (Ncm) Weight (kG)
12 M4B12 -- 56 48 35 14 26 0.63
13 M4B13 -- 60 52 40 14 30 0.78
14 M4B14 -- 64 56 45 14 34 0.93
15 M4B15 -- 68 60 45 14 38 1.05
16 M4B16 -- 72 64 50 14 40 1.20
17 M4B17 -- 76 68 50 15 43 1.33
18 M4B18 -- 80 72 50 15 48 1.47
19 M4B19 -- 84 76 60 15 54 1.75
20 M4B20 -- 88 80 60 15 61 1.90
21 M4B21 -- 92 84 70 20 69 2.22
22 M4B22 -- 96 88 70 20 78 2.39
23 M4B23 -- 100 92 75 20 86 2.60
24 M4B24 -- 104 96 75 20 95 2.79
25 M4B25 -- 108 100 75 20 109 2.98
26 M4B26 -- 112 104 75 20 121 3.18
27 M4B27 -- 116 108 75 20 136 3.39
28 M4B28 -- 120 112 75 20 153 3.60
29 M4B29 -- 124 116 75 20 171 3.83
30 M4B30 -- 128 120 75 20 185 4.06
31 M4B31 -- 132 124 80 20 205 4.39
32 M4B32 -- 136 128 80 20 220 4.64
33 M4B33 -- 140 132 80 20 248 4.90
34 M4B34 -- 144 136 80 20 264 5.16
35 M4B35 -- 148 140 80 20 278 5.43
36 M4B36 -- 152 144 80 20 299 5.63
37 M4B37 -- 156 148 80 20 320 5.80
38 M4B38 M4A38 160 152 80 25 344 5.85
39 M4B39 -- 164 156 80 25 370 5.90
40 M4B40 M4A40 168 160 80 25 394 6.11
45 M4B45 M4A45 188 180 80 25 536 7.78
48 M4B48 M4A48 200 192 80 25 638 8.87
50 M4B50 M4A50 208 200 80 25 710 9.65
52 -- M4A52 216 208 -- 25 795 10.45
55 -- M4A55 228 220 -- 25 913 11.71
57 -- M4A57 236 228 -- 25 1020 12.59
60 M4B60 M4A60 248 240 100 25 1131 13.97
65 M4B65 M4A65 268 260 100 25 1220 16.43
70 -- M4A70 288 280 -- 25 1231 19.09
75 -- M4A75 308 300 -- 25 1288 21.94
76 -- M4A76 312 304 -- 25 1303 22.47
80 -- M4A80 328 320 -- 25 1354 24.93
85 -- M4A85 348 340 -- 25 1430 28.18
90 -- M4A90 368 360 -- 25 1500 31.62
95 -- M4A95 388 380 -- 25 1580 35.26
100 -- M4A100 408 400 -- 25 1650 39.11
110 -- M4A110 448 440 -- 25 1744 47.38
114 -- M4A114 464 456 -- 25 1830 50.91

Module 5 Metric Spur Gear Sizes

module 5 metric spur gear sizes
Note: Dimension h = 50mm, Dimension H = 75mm
Tooth Count B-Type Part # A-Type Part # De (mm) Dp (mm) d (mm) D (mm) Max Torque (Ncm) Weight (kG)
12 M5B12 -- 70 60 45 16 58 1.21
13 M5B13 -- 75 65 50 16 64 1.47
14 M5B14 -- 80 70 55 20 71 1.76
15 M5B15 -- 85 75 60 20 79 2.07
16 M5B16 -- 90 80 65 20 86 2.40
17 M5B17 -- 95 85 70 20 88 2.75
18 M5B18 -- 100 90 70 20 100 3.02
19 M5B19 -- 105 95 70 20 115 3.30
20 M5B20 -- 110 100 80 20 134 3.83
21 M5B21 -- 115 105 80 20 157 4.15
22 M5B22 -- 120 110 80 25 181 4.48
23 M5B23 -- 125 115 90 25 206 5.08
24 M5B24 -- 130 120 90 25 232 5.44
25 M5B25 -- 135 125 90 25 261 5.82
26 M5B26 -- 140 130 100 25 288 6.50
27 M5B27 -- 145 135 100 25 318 6.91
28 M5B28 -- 150 140 100 25 349 7.22
29 M5B29 -- 155 145 100 25 385 7.98
30 M5B30 -- 160 150 100 25 418 8.44
32 M5B32 M5A32 170 160 110 25 495 7.62
35 -- M5A35 185 175 -- 25 626 9.16
36 M5B36 -- 190 180 110 25 700 10.00
38 M5B38 M5A38 200 190 110 30 781 10.84
40 M5B40 M5A40 210 200 110 30 893 12.04
42 M5B42 -- 220 210 120 25 1050 14.00
45 -- M5A45 235 225 -- 30 1202 15..30
48 -- M5A48 250 240 -- 30 1411 17.44
50 -- M5A50 260 250 -- 30 1561 18.86
52 -- M5A52 270 260 -- 30 1721 20.43
55 M5B55 M5A55 285 275 120 30 1978 22.89
57 -- M5A57 295 285 -- 30 2030 24.62
60 M5B60 M5A60 310 300 120 30 2202 27.31
65 -- M5A65 335 325 -- 30 2324 32.12
70 -- M5A70 360 350 -- 30 2482 37.31
75 -- M5A75 385 375 -- 30 2576 42.88
76 -- M5A76 390 380 -- 30 2606 44.04
80 -- M5A80 410 400 -- 30 2708 48.84
85 -- M5A85 435 425 -- 30 2860 55.19
90 -- M5A90 460 450 -- 30 3000 61.92
95 -- M5A95 485 475 -- 30 3160 69.03
100 -- M5A100 510 500 -- 30 3300 76.53
110 -- M5A110 560 550 -- 30 3450 92.69
114 -- M5A114 580 570 -- 30 3600 99.59

Module 6 Metric Spur Gear Sizes

module 6 metric spur gear sizes
Note: Dimension h = 60mm, Dimension H = 80mm
Tooth Count B-Type Part # A-Type Part # De (mm) Dp (mm) d (mm) D (mm) Max Torque (Ncm) Weight (kG)
12 M6B12 -- 84 72 54 20 110 1.82
14 M6B14 -- 96 84 65 20 129 2.20
15 M6B15 -- 102 90 70 20 161 3.01
16 M6B16 -- 108 96 75 20 167 3.46
18 M6B18 -- 120 108 80 20 201 4.33
20 M6B20 -- 132 120 90 20 277 5.43
23 M6B23 -- 150 138 110 25 310 6.00
24 M6B24 -- 156 144 110 25 450 7.88
25 M6B25 -- 162 150 110 25 500 8.42
30 M6B30 M6A30 192 180 110 25 808 9.69
32 -- M6A32 204 192 -- 25 960 11.05
38 -- M6A38 240 220 -- 25 1470 15.69
40 M6B40 M6A40 252 240 120 25 1680 17.42

Module 8 Metric Spur Gear Sizes

module 8 metric spur gear sizes
Note: Dimension h = 65mm, Dimension H = 95mm
Tooth Count Part # De (mm) Dp (mm) d (mm) D (mm) Max Torque (Ncm) Weight (kG)
12 M8B12 112 96 70 25 240 4.2
15 M8B15 136 120 80 25 370 6.5
18 M8B18 160 144 80 25 495 9.0
20 M8B20 176 160 100 30 655 11.5
24 M8B24 208 192 120 30 1045 16.9
25 M8B25 216 200 120 30 1160 18.1
30 M8B30 256 240 150 30 1834 26.6
36 M8B36 304 288 160 40 2900 36.9
40 M8B40 336 320 180 40 3790 46.0