Lead-screw post hole digger
From DDL Wiki
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| style="text-align: center;" | 1 | | style="text-align: center;" | 1 | ||
| style="text-align: center;" | NA oz | | style="text-align: center;" | NA oz | ||
| - | | Transmits rotational motion of lead screw into translational motion, forcing shovels closed | + | | Transmits rotational motion of ''lead screw'' into translational motion, forcing shovels closed |
| T 6061 Aluminum | | T 6061 Aluminum | ||
| Extrusion | | Extrusion | ||
Revision as of 20:18, 1 December 2008
List of Parts
| Part Number | Name | Qty. | Weight | Function | Material | Manufacturing Process | Image |
|---|---|---|---|---|---|---|---|
| 1 | Shaft | 1 | NA oz | Constrains inner parts of tool and handles physical stresses of digging | T 6061 Aluminum | Extrusion | 
|
| 2 | Central rod | 1 | NA oz | Transmits rotational motion of lead screw into translational motion, forcing shovels closed | T 6061 Aluminum | Extrusion | 
|
| 3 | Crank | 1 | NA oz | Turned by user to close shovels | T 6061 Aluminum | Extrusion | 
|
| 4 | Shovel | 2 | NA oz | Contain dirt when digging | Steel | Stamping | 
|
| 5 | Shaft handle | 2 | NA oz | Provides gripping location for ground penetration strike and location for applying counteractive moment to shaft when turning crank to close shovels | T 6061 Aluminum | Extrusion | 
|
| 6 | Shaft peg | 4 | NA oz | Allow user to force tool into the ground using his/her foot | T 6061 Aluminum | Extrusion | 
|
| 7 | Guide bushing | 2 | NA oz | Constrains central rod to maintain linear motion within shaft | T 6061 Aluminum | Extrusion | 
|
| 8 | Lead screw | 1 | NA oz | Transmits rotation of crank into translation of central rod | Steel | Automated CNC lathe/threading machine | 
|
| 9 | Lead screw nut | 1 | NA oz | Constrains lead screw | Brass | Automated CNC milling | 
|
| 10 | Lead screw nut bushing | 1 | NA oz | Constrains lead screw nut and locates it within shaft | T 6061 Aluminum | Lathe??? | 
|
| 11 | Inline ball joint | 1 | NA oz | Translates rotation of lead screw to translation of central rod and connects the two parts | Steel | ??? | 
|
| 12 | Shovel link | 2 | NA oz | Connects central rod to shovels | T 6061 Aluminum | Extrusion | 
|
| 13 | Shovel pivot bolt | 1 | NA oz | Joins center of the two shovels, allowing them to pivot about it as a central axis | Steel | Upset forging | 
|
| 14 | Shovel link bolt | 2 | NA oz | Joins each respective shovel to its shovel link | Steel | Upset forging | 
|
| 15 | Central rod bolt | 1 | NA oz | Joins central rod to the two shovel links as a loosely pinned connection | Steel | Upset forging | 
|
| 16 | Link bushing L | 2 | NA oz | Bushing for shovel link bolt to maintain correct spacing between shovel link and shovel in the large gap | Plastic (PTFE) | Injection molding | 
|
| 17 | Link bushing S | 2 | NA oz | Bushing for shovel link bolt to maintain correct spacing between shovel link and shovel in the small gap | Plastic (PTFE) | Injection molding | 
|
| 18 | 1/4" Nylon Lock Nut | 3 | NA oz | Nut for both shovel link bolts and the central rod bolt | Steel | Upset forging | 
|
| 19 | 5/16" Nylon Lock Nut | 1 | NA oz | Nut for shovel pivot bolt | Steel | Upset forging | 
|
