Table 4.2: Individual Components of Complex Post Hole Digger
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, etc.
| T 6061 Aluminum
| Extrusion
|
|
C2
| End cap
| 2
| 0.05 oz
| Stiffens open end of fiberglass handle, provides surface area for grip to attach over
| Plastic
| Injection molding
|
|
C3
| Fiberglass handle
| 2
| 11.9 oz
| Allows user to operate tool
| Fiberglass with protective coating
| Pultrusion
|
|
C4
| Wooden handle insert
| 2
| 4.2 oz
| Reinforces fiberglass handle where handle attaches to connecting arm
| Wood
| Automated CNC turning
|
|
C5
| Connecting arm
| 2
| 28.1 oz
| Extends length of handle to digging head, bent to particular shape to allow for compound lever action for opening and closing digger heads
| Steel
| Roll forming, swaging, and bending
|
|
C6
| Spacing bracket
| 1
| 1.9 oz
| Maintains spacing of handles when the handles are pushed together
| Steel
| Stamping
|
|
C7
| Handle bolt
| 4
| 0.7 oz
| Attaches Fiberglass handle to Connecting arm
| Steel
| Upset forging
|
|
C8
| Handle washer
| 6
| 0.2 oz
| Increases surface area over which compressive force of Handle bolt is applied, protects Fiberglass handle from damage that would caused by tightening/rotating nut or bolt
| Steel
| Stamping
|
|
C9
| M8 x 1.25 Lock nut with nylon insert
| 7
| 0.1 oz
| Threads onto bolt and tightened to join parts together. Nylon insert prevents nut from loosening
| Steel
| Forging
|
|
C10
| M8 washer
| 3
| 0.05 oz
| Increases surface area over which compressive force of the tightened bolt and nut is applied, placed between nut and surface and/or bolt head and surface to prevent damage to surface when nut is tightened
| Steel
| Stamping
|
|
C11
| Bushing
| 1
| 0.7 oz
| Used to align two Connecting arms and create a low friction surface for Connecting arms to pivot about
| Brass
| Roll forming
|
|
C12
| Plastic spacer
| 1
| 0.05 oz
| Placed concentric with Bushing between two connecting arms to provide low friction surface and prevent the arms from wearing against one another
| Plastic
| Injection molding
|
|
C12
| Scissor pin bolt
| 1
| 0.3 oz
| Joins two handle assemblies together, passes though Bushing to create main joint around which handles pivot
| Steel
| Upset forging
|
|
C13
| M10 washer
| 1
| 0.1 oz
| Increases surface area over which compressive force of the tightened bolt and nut is applied, placed between nut and surface and/or bolt head and surface to prevent damage to surface when nut is tightened
| Steel
| Stamping
|
|
C14
| M10 lock nut with nylon insert
| 1
| 1.3 oz
| Threads onto scissor pin bolt and tightened to join connecting arms together. Nylon insert prevents nut from loosening
| Steel
| Forging
|
|
C15
| Digging head
| 2
| 26.3 oz
| Provides means of digging into dirt, sizing the hole, and removing dirt
| Steel
| Stamping
|
|
C16
| Digging head connecting bolt
| 2
| 0.8 oz
| Joins connecting arm to digging head, allows connecting arm and digging head to pivot
| Steel
| Upset forging
|
|
C17
| Digging head pivot bolt
| 1
| 0.8 oz
| Connects two digging heads together, creates pivot point around which digging heads open and close
| Steel
| Upset forging
|
|
C18
| Large plastic spacer
| 2
| 0.1 oz
| Placed on pivot bolt to align two digging heads and protect pivot bolt
| Plastic
| Injection molding
|
|
C19
| Small plastic spacer
| 1
| 0.05 oz
| Placed on pivot bolt to align two digging heads and protect pivot bolt
| Plastic
| Injection molding
|
|