{"authors":[{"id":"847281629","orcid":"","email":"Neil.Pearson@earlham.ac.uk","name":"Neil Pearson","affiliation":"Earlham Institute"}],"bricks":[{"abstract":"Device to place single ball bearings with minimal effort","id":"1630459632","functions":[{"id":"119456255","description":"3D printed parts of dispender","implementations":[{"id":"1723859969","quantity":1,"type":"part"},{"id":"89337347","quantity":1,"type":"part"},{"id":"1249661722","quantity":1,"type":"part"},{"id":"1836153534","quantity":1,"type":"part"}]},{"id":"721044178","description":"Springs to activate the dispenser","implementations":[{"id":"1316028","quantity":1,"type":"part"},{"id":"1251122849","quantity":1,"type":"part"}]},{"id":"1212240166","description":"Screws or glue to fix the dispenser","implementations":[{"id":"1777351442","quantity":1,"type":"part"}]}],"authors":["847281629"],"files":[{"url":".\/.\/usdata\/img.JPG"},{"url":".\/.\/usdata\/IMG_0355.JPG"},{"url":".\/.\/usdata\/0-Ball bearing dispenser.dxf"},{"url":".\/.\/usdata\/0-Ball bearing dispenser.rsdoc"},{"url":".\/.\/usdata\/1-Ball bearing dispenser.dxf"},{"url":".\/.\/usdata\/2-Ball bearing dispenser.dxf"}],"long_description":"A handy dispenser for sterile ball bearings used in some library preparation\/DNA extraction protocols, releasing a single ball bearing per press of the plunger. Without this device, this stage in the protocol requires a scientist to retrieve tiny ball bearings from a bag, one by one, while wearing gloves and maintaining sterile technique - a substantial drain on time and patience.","instructions":[{"name":"assembly","steps":[{"files":[],"description":"3d-print all the STL files with a standard desktop FDM printer.","components":[{"id":"119456255","quantity":"1"}]},{"files":[{"url":".\/.\/usdata\/IMG_0356.JPG"}],"description":"Push the two 3mm nuts into the matching slots on the left body half.","components":[{"id":"1212240166","quantity":"2"}]},{"files":[{"url":".\/.\/usdata\/IMG_0357.JPG"},{"url":".\/.\/usdata\/IMG_0358.JPG"}],"description":"Push the large spring down the length of the push rod. Place the push rod into the left body half.","components":[{"id":"721044178","quantity":"1"}]},{"files":[{"url":".\/.\/usdata\/IMG_0359.JPG"},{"url":".\/.\/usdata\/IMG_0360.JPG"}],"description":"Attach the small spring to the agitator. Then place the agitator in the left body half and site the other end of the spring in its bracket.","components":[]},{"files":[{"url":".\/.\/usdata\/IMG_0361.JPG"}],"description":"Place the hatch in its slot.","components":[]},{"files":[{"url":".\/.\/usdata\/IMG_0362.JPG"},{"url":".\/.\/usdata\/IMG_0364.JPG"}],"description":"Place the right body half on top of everything. Push the two 3mm bolts down the holes and tighten with a screwdriver. Alternatively, it can be glued together, but this renders it non-serviceable.","components":[{"id":"1212240166","quantity":"2"}]}]}],"name":"Ball bearing dispenser","license":"MIT license","notes":"It is easily capable of holding more than 100 ball bearings. This object was designed in DesignSpark Mechanical. Please find the design file with the ending .rsdoc attached below."}],"parts":[{"id":"1723859969","files":[{"url":".\/.\/usdata\/Dispenser_left.stl"},{"url":".\/.\/usdata\/Dispenser_right.stl"}],"description":"3d print the two body halfs from their STL files.","name":"Body of dispenser","manufacturing_instruction":{"steps":[]},"supplier_part_num":"","material_amount":"0.1","manufacturer_part_num":"","material_unit":"KG","url":"","supplier":""},{"id":"89337347","files":[{"url":".\/.\/usdata\/Push_rod.stl"}],"description":"","name":"Push rod","manufacturing_instruction":{"steps":[]},"supplier_part_num":"","material_amount":"0.01","manufacturer_part_num":"","material_unit":"KG","url":"","supplier":""},{"id":"1249661722","files":[{"url":".\/.\/usdata\/Agitator.stl"}],"description":"","name":"Agitator","manufacturing_instruction":{"steps":[]},"supplier_part_num":"","material_amount":"0.01","manufacturer_part_num":"","material_unit":"KG","url":"","supplier":""},{"id":"1836153534","files":[{"url":".\/.\/usdata\/Hatch.stl"}],"description":"","name":"Hatch","manufacturing_instruction":{"steps":[]},"supplier_part_num":"","material_amount":"0.01","manufacturer_part_num":"","material_unit":"KG","url":"","supplier":""},{"id":"1316028","files":[],"description":"Steel spring, approximately of the sixe 38mm x 5.8mm x 0.5mm\nExample details:\nUncompressed Spring Length (mm) - 38 \nWire Thickness (mm) - 0.5 \nInside Diameter (mm) - 4.8 \nOutside Diameter - (mm) - 5.8 \nPRESSURE At 50% Compression (Grams) - 500","name":"Large spring","manufacturing_instruction":{"steps":[]},"supplier_part_num":"CS011","material_amount":"","manufacturer_part_num":"CS011","material_unit":"NONE","url":"http:\/\/www.amazon.co.uk\/Compression-Pressure-Engineering-Spring-DIMENSIONS\/dp\/B00O3LA0Y8\/ref=sr_1_19?ie=UTF8&qid=1452890590&sr=8-19&keywords=compression+spring","supplier":"Amazon"},{"id":"1251122849","files":[],"description":"Steel spring, approximately of the sixe 10mm x 2.8mm x 0.2mm\nExample details:\nUncompressed Spring Length (mm) - 10 \nWire Thickness (mm) - 0.2 \nInside Diameter (mm) - 2.8 \nOutside Diameter - (mm) - 2.8 \nPRESSURE At 50% Compression (Grams) - 130","name":"Small spring","manufacturing_instruction":{"steps":[]},"supplier_part_num":"CS017","material_amount":"","manufacturer_part_num":"CS017","material_unit":"NONE","url":"http:\/\/www.amazon.co.uk\/Compression-Pressure-Engineering-Spring-DIMENSIONS-x\/dp\/B00O3LMMZS\/ref=sr_1_114?ie=UTF8&qid=1452806626&sr=8-114&keywords=10mm+compression+spring","supplier":"Amazon"},{"id":"1777351442","files":[],"description":"M3 scew 3mm x 20mm and nut","name":"M3 bolt and nut","manufacturing_instruction":{"steps":[]},"supplier_part_num":"","material_amount":"","manufacturer_part_num":"","material_unit":"NONE","url":"","supplier":""}]}