Sample data from Engineering Database — 375 reference tables, deterministic calculators, and Engineering AI. Sign up free
Gear Tooth Proportions: spur
spur 20 full metric clearance to spur 20 stub english dedendum
Gear tooth proportions — standard dimensions and formulas for spur, helical, bevel, and worm gears per AGMA standards
| gear type | record id | formula | parameter | pressure angle deg | standard | tooth form | value factor (dimensionless) |
|---|---|---|---|---|---|---|---|
| spur | spur 20 full metric clearance | 0.25m | clearance | 20 | AGMA 201.02 / ANSI/AGMA 1012-G05 | full depth | 0.25 |
| spur | spur 20 full metric dedendum | 1.25m | dedendum | 20 | AGMA 201.02 / ANSI/AGMA 1012-G05 | full depth | 1.25 |
| spur | spur 20 full metric fillet radius | 0.3m | fillet radius | 20 | AGMA 201.02 / ANSI/AGMA 1012-G05 | full depth | 0.3 |
| spur | spur 20 full metric tooth thickness | pi*m/2 | tooth thickness | 20 | AGMA 201.02 / ANSI/AGMA 1012-G05 | full depth | 1.570796 |
| spur | spur 20 full metric whole depth | 2.25m | whole depth | 20 | AGMA 201.02 / ANSI/AGMA 1012-G05 | full depth | 2.25 |
| spur | spur 20 full metric working depth | 2m | working depth | 20 | AGMA 201.02 / ANSI/AGMA 1012-G05 | full depth | 2 |
| spur | spur 20 stub english addendum | 0.8/P | addendum | 20 | AGMA 203.03 / ANSI/AGMA 1012-G05 | stub | 0.8 |
| spur | spur 20 stub english circular pitch | pi/P | circular pitch | 20 | AGMA 203.03 / ANSI/AGMA 1012-G05 | stub | 3.141593 |
| spur | spur 20 stub english clearance | 0.2/P | clearance | 20 | AGMA 203.03 / ANSI/AGMA 1012-G05 | stub | 0.2 |
| spur | spur 20 stub english dedendum | 1.0/P | dedendum | 20 | AGMA 203.03 / ANSI/AGMA 1012-G05 | stub | 1 |
What else is in Engineering Database
Iron Engine ↗Engineering AI at ironengine.ai
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators