Update to Changeable Garden Tool Heads

Update to Changeable Garden Tool Heads. A few students from previous classes created smart and creative tools that could be used anywhere in the world for many different applications. I took it upon myself to create a universal, ergonomic handle, and update two tools to interchange easily with my handle. I also uploaded a file used to create more tools that would fit with the handle, if anyone would like to add to the attachments.

Bill of Materials[edit | edit source]

1. Handle
2. Pin
3. Pruning Hook
   1. (2) Stanley Heavy Duty Utility Blades (10 for $6.14)
   2. (4) 3MM nuts and bolts
4. Cultivator Rake

Source File

File:InterchangeableGardenTools.fcstd

YouMagine Entry

STLs on Github Repository

Tools needed[edit | edit source]

• MOST Delta RepRap or similar RepRap 3-D printer
• Philips Screwdriver
• Pliers to Tighten Nuts
• Sandpaper for minor sanding to ensure perfect fits into handle

Skills and knowledge needed[edit | edit source]

• Slicing Software such as Cura
• Open Source CAD software such as FreeCAD

Technical Specifications and Assembly Instructions[edit | edit source]

The following are the setting I used to print each piece. These may not be the optimal settings, but the final pieces work well

Handle - 32g filament - 2.5 hours to print

• Infill: 10%
• Layer Height: 0.2 mm
• Shell Thickness: 1.5 mm
• Bottom and Top Thickness: 1.5 mm

Pin - 2g filament - 15 minutes to print

• Infill: 10%
• Layer Height: 0.2 mm
• Shell Thickness: 1 mm
• Bottom and Top Thickness: 1 mm

Pruning Hook - Based off Hannah Power's Pruning hook - 29g filament - 2 hours to print

• Infill: 50%
• Layer Height: 0.2 mm
• Shell Thickness: 1.5 mm
• Bottom and Top Thickness: 1.5 mm

Cultivator Rake - Based off Matthew Andres' Hand cultivator - 66g filament - 5 hours to print

• Infill: 50%
• Layer Height: 0.2 mm
• Shell Thickness: 1.5 mm
• Bottom and Top Thickness: 1.5 mm

Common Problems and Solutions[edit | edit source]

I had an issue with parts pealing off the bed, especially the cultivator head. I printed it again with a brim and no issue

Cost savings[edit | edit source]

• $3.25 in PLA filament
• $1.50 in nuts and bolts from hardware store
• $1.23 for 2 utility blades [1]

$4.63 Total

Commercial Equivalent

• Pruning Knife - $15.74 [2]
• Cultivator Rake - $10.71 [3]

$26.45 Total Savings = $21.82 = 82%