Standard 20 DP Gears
$12.00 – $26.00
20 DP gears are the most common gears used in FIRST Robotics Competition gearboxes. Want to replace one of your existing gears? Building a custom gearbox? This page is a hub for all of our standard...Read More
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20 DP gears are the most common gears used in FIRST Robotics Competition gearboxes. Want to replace one of your existing gears? Building a custom gearbox? This page is a hub for all of our standard width, symmetrical 3/8 hex and 1/2 inch hex bore 20 DP gears.
Check out our other 20 DP Gear pages for Pinion Gears and Shifting Gears and other special gears like those for the Toughbox line.
| Part Number | Tooth Count | Hex Bore (in.) | Outside Dia (in.) | Pitch Dia (in.) | Weight (lbs) |
|---|---|---|---|---|---|
| am-3484 | 14 | 0.375 | 0.80 | 0.70 | 0.03 |
| am-4389 | 15 | 0.375 | 0.85 | 0.75 | |
| am-4665 | 16 | 0.375 | 0.90 | 0.80 | 0.05 |
| am-4390 | 17 | 0.375 | 0.95 | 0.85 | |
| am-3534 | 18 | 0.375 | 1.00 | 0.90 | 0.05 |
| am-4212 | 18 | 0.500 | 1.00 | 0.90 | 0.05 |
| am-3645 | 19 | 0.375 | 1.05 | 0.95 | 0.07 |
| am-5131 | 19 | 0.500 | 1.05 | 0.95 | 0.06 |
| am-4213 | 20 | 0.500 | 1.10 | 1.00 | 0.06 |
| am-3820 | 20 | 0.375 | 1.10 | 1.00 | 0.07 |
| am-3646 | 21 | 0.375 | 1.15 | 1.05 | 0.08 |
| am-5132 | 21 | 0.500 | 1.15 | 1.05 | 0.07 |
| am-3485 | 24 | 0.375 | 1.30 | 1.20 | |
| am-4214 | 24 | 0.500 | 1.30 | 1.20 | 0.11 |
| am-3535 | 25 | 0.500 | 1.35 | 1.25 | 0.11 |
| am-4391 | 25 | 0.375 | 1.35 | 1.25 | |
| am-3647 | 28 | 0.375 | 1.50 | 1.40 | |
| am-5133 | 28 | 0.500 | 1.50 | 1.40 | 0.14 |
| am-4392 | 28 | 0.375 | 1.50 | 1.40 | |
| am-5134 | 29 | 0.375 | 1.55 | 1.45 | 0.11 |
| am-5135 | 29 | 0.500 | 1.55 | 1.45 | 0.15 |
| am-3536 | 30 | 0.375 | 1.60 | 1.50 | 0.11 |
| am-4215 | 30 | 0.500 | 1.60 | 1.50 | 0.11 |
| am-3815 | 32 | 0.500 | 1.70 | 1.60 | 0.11 |
| am-5136 | 32 | 0.375 | 1.70 | 1.60 | 0.11 |
| am-3537 | 34 | 0.375 | 1.80 | 1.70 | 0.13 |
| am-5137 | 34 | 0.500 | 1.80 | 1.70 | 0.14 |
| am-4186 | 35 | 0.375 | 1.85 | 1.75 | 0.14 |
| am-3486 | 35 | 0.500 | 1.85 | 1.75 | 0.15 |
| am-5147 | 35 | 0.500 | 1.85 | 1.75 | 0.05 |
| am-5146 | 35 | 0.375 | 1.85 | 1.75 | 0.05 |
| am-3816 | 36 | 0.500 | 1.90 | 1.80 | 0.15 |
| am-4709 | 36 | 0.500 | 1.90 | 1.80 | 0.25 |
| am-5138 | 36 | 0.375 | 1.90 | 1.80 | 0.13 |
| am-3538 | 38 | 0.375 | 2.00 | 1.90 | 0.15 |
| am-3718 | 38 | 0.500 | 2.00 | 1.90 | |
| am-3976 | 40 | 0.375 | 2.10 | 2.00 | 0.17 |
| am-3487 | 40 | 0.500 | 2.10 | 2.00 | 0.18 |
| am-4710 | 40 | 0.500 | 2.10 | 2.00 | 0.32 |
| am-5148 | 40 | 0.500 | 2.10 | 2.00 | 0.06 |
| am-4393 | 43 | 0.500 | 2.25 | 2.15 | 0.21 |
| am-5139 | 43 | 0.375 | 2.25 | 2.15 | 0.19 |
| am-5149 | 43 | 0.375 | 2.25 | 2.15 | 0.07 |
| am-4711 | 43 | 0.500 | 2.25 | 2.15 | 0.37 |
| am-5151 | 43 | 0.500 | 2.25 | 2.15 | 0.07 |
| am-4394 | 45 | 0.500 | 2.35 | 2.25 | 0.20 |
| am-4712 | 45 | 0.500 | 2.35 | 2.25 | 0.41 |
| am-5140 | 45 | 0.375 | 2.35 | 2.25 | 0.20 |
| am-5152 | 45 | 0.375 | 2.35 | 2.25 | 0.07 |
| am-5153 | 45 | 0.500 | 2.35 | 2.25 | 0.07 |
| am-5141 | 46 | 0.375 | 2.40 | 2.30 | 0.19 |
| am-3819 | 46 | 0.500 | 2.40 | 2.30 | 0.19 |
| am-4713 | 46 | 0.500 | 2.40 | 2.30 | 0.43 |
| am-4395 | 48 | 0.500 | 2.50 | 2.40 | 0.26 |
| am-4714 | 48 | 0.500 | 2.50 | 2.40 | 0.48 |
| am-5142 | 48 | 0.375 | 2.50 | 2.40 | 0.22 |
| am-3488 | 50 | 0.500 | 2.60 | 2.50 | 0.25 |
| am-4715 | 50 | 0.500 | 2.60 | 2.50 | 0.50 |
| am-4367 | 50 | 0.375 | 2.60 | 2.50 | 0.24 |
| am-4720 | 50 | 0.375 | 2.60 | 2.50 | 0.51 |
| am-5154 | 50 | 0.375 | 2.60 | 2.50 | 0.08 |
| am-5155 | 50 | 0.500 | 2.6 | 2.5 | 0.09 |
| am-4733 | 52 | 0.375 | 2.70 | 2.60 | |
| am-3821 | 52 | 0.500 | 2.70 | 2.60 | 0.23 |
| am-3822 | 56 | 0.500 | 2.90 | 2.80 | 0.27 |
| am-5156 | 56 | 0.375 | 2.90 | 2.80 | 0.01 |
| am-5143 | 56 | 0.375 | 2.90 | 2.80 | 0.27 |
| am-5157 | 56 | 0.500 | 2.90 | 2.80 | 0.10 |
Specifications
- Bore: 0.501-0.507 in. Hex, 0.376-0.381 in. Hex
- Diametral Pitch: 20
- Face Width: 0.375 in.
- Finish: Zinc Plated
- Material: 4140 Steel
- Width: 0.500 in.
Documents
Layout Print(s)
CAD File(s)
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