Module

No.of teeth

Helix

Pitch  diameter

Outside  diameter

Thickness

Diameter of
Hole

1.25

115

5°

144.299

149.25

20

63.5

1.5

115

5°

173.159

178.66

1.75

100

5°

175.668

181.72

2

83

5°

166.634

171.714

20

63.5

2.25

73

5°

164.877

170.518

2.5

67

5°

168.14

174.32

2.75

61

5°

168.391

175.131

3

53

5°

159.607

167.307

3.25

53

5°

172.908

181.948

3.5

47

5°

165.128

175.728

3.75

43

5°

161.866

174.006

4

41

5°

164.626

177.726

4.5

37

5°

167.136

182.136

5

31

5°

155.592

173.492

5.5

29

5°

160.109

179.709

6

27

5°

162.619

184.319

Nominal pitch diameter 180mm  α20° β15°

 mm

Module

No.of teeth

Helix

Pitch  diameter

Outside  diameter

Thickness

Diameter of
Hole

1.25

115

15°

148.821

153.77

20

63.5

1.5

115

15°

178.585

184.09

1.75

100

15°

181.173

187.22

2

83

15°

171.856

176.936

20

63.5

2.25

73

15°

170.044

175.685

2.5

67

15°

173.409

179.59

2.75

61

15°

173.668

180.408

3

53

15°

164.609

172.31

3.25

53

15°

178.326

186.567

3.5

47

15°

170.303

179.763

3.75

43

15°

166.938

178.159

4

41

15°

169.785

181.866

4.5

37

15°

172.373

186.394

5

31

15°

160.468

177.369

5.5

29

15°

165.127

183.827

6

27

15°

167.715

187.856

Nominal pitch diameter 240mm  α20° β5°

 mm

Module

No.of teeth

Helix

Pitch  diameter

Outside  diameter

Thickness

Diameter of
Hole

2

115

5°

230.879

235.819

25

63.5

2.25

103

5°

232.635

238.135

2.5

91

5°

228.369

234.549

2.75

83

5°

229.122

235.862

3

73

5°

219.837

227.536

3.25

67

5°

218.582

226.822

3.5

61

5°

214.316

223.115

3.75

61

5°

229.624

238.964

4

53

5°

212.81

222.71

4.5

51

5°

230.377

241.377

5

43

5°

215.821

229.921

5.5

41

5°

226.361

241.901

6

37

5°

222.848

240.708

6.5

35

5°

228.369

247.989

7

31

5°

217.829

240.189

8

27

5°

216.825

243.445

Nominal pitch diameter 240mm  α20° β15°

 mm

Module

No.of teeth

Helix

Pitch  diameter

Outside  diameter

Thickness

Diameter of
Hole

2

115

15°

238.114

243.054

25

63.5

2.25

103

15°

239.925

245.425

2.5

91

15°

235.525

241.705

2.75

83

15°

236.302

243.042

3

73

15°

226.725

234.425

3.25

67

15°

225.431

233.671

3.5

61

15°

221.031

229.831

3.75

61

15°

236.819

246.159

4

53

15°

219.479

229.379

4.5

51

15°

237.596

248.596

5

43

15°

222.584

234.684

5.5

41

15°

233.455

246.655

6

37

15°

229.831

246.471

6.5

35

15°

235.525

253.885

7

31

15°

224.655

245.815

8

27

15°

223.62

249.06