Commonly used drive ratios with 64 pitch gears

7 tooth pinion

35

36

37

38

39

0.670

7.463

7.676

7.889

8.102

8.316

0.680

7.353

7.563

7.773

7.983

8.193

0.690

7.246

7.453

7.660

7.867

8.075

0.700

7.143

7.347

7.551

7.755

7.959

0.710

7.042

7.243

7.445

7.646

7.847

0.720

6.944

7.143

7.341

7.540

7.738

0.730

6.849

7.045

7.241

7.436

7.632

0.740

6.757

6.950

7.143

7.336

7.529

0.750

6.667

6.857

7.048

7.238

7.429

0.760

6.579

6.767

6.955

7.143

7.331

0.770

6.494

6.679

6.865

7.050

7.236

8 tooth pinion

35

36

37

38

39

0.670

6.530

6.716

6.903

7.090

7.276

0.680

6.434

6.618

6.801

6.985

7.169

0.690

6.341

6.522

6.703

6.884

7.065

0.700

6.250

6.429

6.607

6.786

6.964

0.710

6.162

6.338

6.514

6.690

6.866

0.720

6.076

6.250

6.424

6.597

6.771

0.730

5.993

6.164

6.336

6.507

6.678

0.740

5.912

6.081

6.250

6.419

6.588

0.750

5.833

6.000

6.167

6.333

6.500

0.760

5.757

5.921

6.086

6.250

6.414

0.770

5.682

5.844

6.006

6.169

6.331
 

9 tooth pinion

35

36

37

38

39

0.670

5.804

5.970

6.136

6.302

6.468

0.680

5.719

5.882

6.046

6.209

6.373

0.690

5.636

5.797

5.958

6.119

6.280

0.700

5.556

5.714

5.873

6.032

6.190

0.710

5.477

5.634

5.790

5.947

6.103

0.720

5.401

5.556

5.710

5.864

6.019

0.730

5.327

5.479

5.632

5.784

5.936

0.740

5.255

5.405

5.556

5.706

5.856

0.750

5.185

5.333

5.481

5.630

5.778

0.760

5.117

5.263

5.409

5.556

5.702

0.770

5.051

5.195

5.339

5.483

5.628
 

10 tooth pinion

35

36

37

38

39

0.670

5.224

5.373

5.522

5.672

5.821

0.680

5.147

5.294

5.441

5.588

5.735

0.690

5.072

5.217

5.362

5.507

5.652

0.700

5.000

5.143

5.286

5.429

5.571

0.710

4.930

5.070

5.211

5.352

5.493

0.720

4.861

5.000

5.139

5.278

5.417

0.730

4.795

4.932

5.068

5.205

5.342

0.740

4.730

4.865

5.000

5.135

5.270

0.750

4.667

4.800

4.933

5.067

5.200

0.760

4.605

4.737

4.868

5.000

5.132

0.770

4.545

4.675

4.805

4.935

5.065
 

11 tooth pinion

35

36

37

38

39

0.670

4.749

4.885

5.020

5.156

5.292

0.680

4.679

4.813

4.947

5.080

5.214

0.690

4.611

4.743

4.875

5.007

5.138

0.700

4.545

4.675

4.805

4.935

5.065

0.710

4.481

4.609

4.738

4.866

4.994

0.720

4.419

4.545

4.672

4.798

4.924

0.730

4.359

4.483

4.608

4.732

4.857

0.740

4.300

4.423

4.545

4.668

4.791

0.750

4.242

4.364

4.485

4.606

4.727

0.760

4.187

4.306

4.426

4.545

4.665

0.770

4.132

4.250

4.368

4.486

4.604