Leaf Claw that fits into the modular handle arm
FA info icon.svg Angle down icon.svg Device data
Manufacturing files https://www.thingiverse.com/thing:1183651
Hardware license CERN-OHL-S
Certifications Start OSHWA certification
FA info icon.svg Angle down icon.svg Project data
Authors Karan C Dhankani
Location Michigan, USA
Status Designed
Made Yes
Replicated No
Cost 5.00
Uses development, industry, hobbyism, gardening
OKH Manifest Download

With a modular setup, this device can be used as multiple tools in one. Main applications could be for people from third world countries where there is minimal automation. A shovel helper grip attachment could save a lot of effort by transferring some of the load from the user's back to the well gripped other hand. This in-turn results into lesser fatigue and more productivity.

Also, the Leaf Claws attachment can function as a big sized leaf collector hand or as even a shovel for damp yards. These type of attachments could also be used to reach certain areas (eg: for maintenance purposes in sanitation) where use of bare hands could have caused infections. The stl files can be downloaded from here: http://www.thingiverse.com/thing:1183651

Images[edit | edit source]

Bill of Materials[edit | edit source]

  1. 3 bolts: 5/16 inch diameter with approx 5 cm length: 38 cents x 3 = USD 1.14
  2. 3 Nuts that fit into those bolts: 21 cents x 3 = USD 0.63
  3. Hair band / Rubber band: Free?
  4. PLA filament: Approx 50 x 3 grams = USD 3.2

Tools needed[edit | edit source]

  1. MOST Delta RepRap or similar RepRap 3-D printer

Skills and knowledge needed[edit | edit source]

  • Knowledge of FreeCAD and Cura

Technical Specifications and Assembly Instructions[edit | edit source]

To Assemble:

  1. Download the part files provided above in the bill of materials
  2. Convert stl files to gcode using software like Cura
  3. Print all of the Parts
  4. Attach a hair band / rubber band with the handle arm to make it a comfortable grip on the user's wrist
  5. Connect the interlocking jaws of whichever tool you want to use
  6. Secure with nut and bolt


  • Total print time estimate: 5 hours
  • Total assembly time estimate: 3 minutes

Common Problems and Solutions[edit | edit source]

  • One must be careful of your printer radius and calibration as a couple of those parts only just fit into my Delta: check how thw first couple of layers print and shrink the models if needed (all be same amount)
  • Sticking to the bed could be a common problem in case of such large prints: Use high quantities of washable glue on bed before printing

Cost savings[edit | edit source]

  1. Cost Estimate: USD 5 for two tools
  2. Equivalent products in market cost: USD 33 (Backsaver grip: USD 13 and Leaf claw: USD 20)
  3. Net savings achieved: USD 28 (Atleast)
  4. Similar products online:
    1. http://www.amazon.com/Leaf-Claws/dp/B00D910KTI/ref=sr_1_7?ie=UTF8&qid=1449613392&sr=8-7&keywords=leaf+hand
    2. http://www.amazon.com/Leaf-Claws/dp/B00D910KTI/ref=sr_1_7?ie=UTF8&qid=1449613392&sr=8-7&keywords=leaf+hand
    3. http://www.amazon.com/Stout-Backsaver-Attachment-Garden-Assorted/dp/B000DEN57S/ref=lp_128061011_1_24?s=lawn-garden&ie=UTF8&qid=1448856619&sr=1-24

References[edit | edit source]

  1. www.amazon.com
  2. www.walmart.com

FA info icon.svg Angle down icon.svg Page data
Keywords 3d printing, backsaver, gardening, leaf claw, modular arm, osat, yard work, pla filament
SDG SDG03 Good health and well-being, SDG08 Decent work and economic growth
Authors Karan C Dhankani
License CC-BY-SA-4.0
Organizations MOST, MTU, MY4777
Language English (en)
Related 0 subpages, 6 pages link here
Impact 293 page views
Created December 8, 2015 by Karan C Dhankani
Modified February 28, 2024 by Felipe Schenone
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