The crane is built mostly from wood and uses various screws, nut, bolts, caster wheels, and a variety of other parts.
I will try to give as much information as possible so you can build something similar. Believe me that your kids are going to love this thing. It may take some time to build, but the results are worth it. What else are you going to do with your spare time.
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Signing UpStep 1: Tools and Materials You Will Need
This is a fairly long list of materials, but you may be able to use some parts that you already have.
MATERIALS LIST
WOOD
- 1 - 3/4" x 60" x 60" baltic birch plywood
- 1 - 1/2" x 8" x 12" baltic birch plywood
- 1 - 1/4" x 3" x 12" baltic birch plywood
HARDWARE
- 17 of 1/4" x 4" carriage bolts - home improvement store
- 1 of 1/4" x 4" carriage bolts - home improvement store
- 4 of 1/4" x 5" carriage bolts - home improvement store
- 1 of 1/4" x 6" carriage bolts - home improvement store
- 10 of 1/4" flat washer - home improvement store
- 4 of 1/4" flat washer - nylon or plastic - home improvement store
- 12 of 1/4" lock washer - home improvement store
- 2 of 1/4" carriage bolt caps - home improvement store
- 34 o1/4" nyloc nut - Nylon-Insert Locknut 1/4"-20 Screw Size - home improvement store or McMaster (404) 629-6500 http://www.mcmaster.com/ part# 90640A129
- 12 of 1/4" - 20 x 1-1/4" panhead straight bolt - home improvement store
- 4 of 1/2" flat washer - home improvement store
- 1 of 1/4" - 20 x 1-1/2" cap screw (allen wrench or slotted head) - home improvement store
- 1 of 3/8" x 3-1/2" carriage bolt - threaded on end only - not all-thread Home Depot or other home improvement store
- 2 of 3/8" flat washer - home improvement store
- 1 of 3/8" nut - home improvement store
- 1 of 3/8 nyloc nut - home improvement store
- 1 of 1/2" x 3 foot long steel rod - home improvement store
- 1 of 1" x 1/8" x 3 foot aluminum bar stock - home improvement store
- 10 of 1-5/8" coarse gold #8 deck screw or regular #8 wood screw - home improvement store
- 5 of 2" coarse gold #8 deck screw or regular #8 wood screw - home improvement store
- 4 of 1-1/4" #6 pan head wood screws - home improvement store
- 4 of 1-1/4" (32mm) washer head #2 square drive coarse screws (for pocket holes) - not needed if attaching the seat top by other method - home improvement store
- 2 of 1-1/4" #8 - 32tpi machine screw (for attaching sprockets to 1/2" rod) - home improvement store
- 3 of 2" #8 - 32tpi machine screw (for tapped holes in modified caster wheel and attaching sprocket on bike crank) - home improvement store
- 3 of #8 nyloc nut - home improvement store
- 1 pk of 1/4'' -20 Threaded Inserts - order 1 pack of 10 - 2 are needed Woodcraft - 800-225-1153 http://www.woodcraft.com part#12K50 $5.99
MISCELLANEOUS
- 1 pk of 1/2" rare earth magnets - order 1 pack of 10 - 8 are needed Rockler Woodworking and Hardware - 1-800-279-4441 http://www.rockler.com 30810 $8.29
- 1 of 1/2" copper pipe x 5-feet long - home improvement store
- 10 feet of 1/4" nylon rope - home improvement store
- 1 plastic hook - home improvement store
- 1 of Steel Ball Bearing, Flanged Double Sealed For 3/8" Shaft Dia, 7/8" Od McMaster - (404) 629-6500. http://www.mcmaster.com/ part# 6384K354
- 2 of 1/2" inner diameter / 1-1/8" outer diameter roller bearing - for transfer rod McMaster - (404) 629-6500. http://www.mcmaster.com/ part# 60355K46
- 1 Miscellaneous 1/2" inner diameter shaft lock collar McMaster - (404) 629-6500. http://www.mcmaster.com/ part# 6432K16
- 1 of 18 tooth #35 sprocket with 7/8" bore diameter - for caster McMaster - (404) 629-6500. http://www.mcmaster.com/ part# 6280K21
- 2 of 10 tooth #35 sprocket with 1/2" bore diamter - for transfer rod McMaster - (404) 629-6500. http://www.mcmaster.com/ part# 6280K322
- 1 of 16 tooth #35 sprocket with 1" bore diamter - for foot crank McMaster - (404) 629-6500. http://www.mcmaster.com/ part# 6280K385
- 1 pk Miscellaneous nylon spacers - 1/4" inner diameter, 1/2" outer diamers, 3/4" long - approximately 26 needed, but come in pack of 100 McMaster - (404) 629-6500. http://www.mcmaster.com/ part# 94639A505
- 1 of 2-inch diameter smiley face superball - Local Craft Store
PEDALS AND BIKE PARTS
- 1 ea Pedals Pyramid Barefoot Pedals, 1/2 PN# 41021 BikepartsUSA A Bicycle Inc. - (877)-727-8731 http://www.bikepartsusa.com SKU: 01-117564 $9.99
- 1 ea Bike Crank Pyramid 3-1/2 PN# 21016 crank BikepartsUSA A Bicycle Inc. - (877)-727-8731 http://www.bikepartsusa.com SKU: 01-97559 $7.29
- 1 ea Bottom Bracket Pyramid BMX, 1-pc, 24 TPI, BB set PN# 22240 - bottom bracket BikepartsUSA A Bicycle Inc. - (877)-727-8731 http://www.bikepartsusa.com SKU: 01-98783 $5.99
CASTERS
- 3 of 3" Casters, Non-Locking, Non-Swiveling with 4 Hole Mounting Plate Woodcraft - 800-225-1153 http://www.woodcraft.com part# 141052 $11.50
CHAIN
- 4 feet of #35 roller chain McMaster - (404) 629-6500. http://www.mcmaster.com/ part# 6261K294
- 4 of #35 chain connecting link McMaster - (404) 629-6500. http://www.mcmaster.com/ part# 6261K191
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2 of #35 chain half connecting link McMaster - (404) 629-6500. http://www.mcmaster.com/ part# 6261K261
Tools
The tools I used on the project were as follows:
- Table saw - JET
- Band saw - GRIZZLY
- Oscillating spindle and belt sander - RIDGID
- Cordless drill - MILWAUKEE
- Drill press - DELTA
- Random orbit sander - PORTER CABLE
- Router - PORTER CABLE
- Router table.
- Pipe cutter for copper pipe.
- Hacksaw or cutoff saw
- Sanding block
- Screwdrivers and wrenches - CRAFTSMAN
Here is a link to one of the Craftsman wrenches I used.
I wish I would have had this Craftsman sander for sanding the larger wood pieces in this project. My other sander was going out while I was finishing up the last pieces on this project.
NOTE: If you plan on using any tool for a project please make sure you are familiar with the tool and all of the dangers associated with it. If you are not familiar with a tool then you should ask someone who is to show you the proper way to use it. A lot of communities have classes at local colleges on the proper use of tools and machinery. There are also local woodworking clubs that offer classes at very reasonable rates for beginners. I highly recommend using these resources for your safety and for the most efficient use of the tool.
SAFETY FIRST
Always wear eye and hearing protection.
Always work safe with the proper safety equipment and guards on your tools.



















































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http://www.buildandcreate.com/
Let me know if you have any questions.
Steve
I've worked with plywood a bit.
I'm a civil engineer by day and like mixing the wood and metal parts.
Autocad was used for the plans originally.
Fantastic crane and excellent instructable.
Who had more fun, the boys with the crane or you dreaming it up and making it?
Most adults have to sit down on the crane and try it out the first time they see it.
Can you take your crane a step further by building a low to the floor, two-section 'ring' to fit around the crane platform, with marked positions for geometric shapes that could receive matching building blocks? Then the child could have games that would have him moving and placing the blocks by size, colour, number, symbol or alphabet, all around his crane.
If you inset pairs of rare earth magnets in the bottoms of the blocks and the matching block places, the blocks should self align as they are lowered the last few inches. Slightly smaller, bottomless blocks, to allow for the needed top rings for the hook, could also be made for stacking, adding another dimension to the games.
You can also add a sliding, notched 'push/pull stick' to the right side, that would allow him/her to simply push the cable out, from a few inches to about a foot, so the cutouts could be staggered, making it more challenging to pick-up and place the 'building blocks'. You can allow for the pulling in of the cable a few inches as well.
By building the block ring in two sections, storage is made easy, simply place the top sides together and let a few magnets inset for this purpose, hold it together. A cutout handle should be included.
This looks like a heck of a lot of fun too! And truly an heirloom.
Thanks.
psst..add a shield
is it very heavy? would putting it on a mobile platform be practical?
It is pretty heavy which makes it nice and stable. I don't think it would be as stable if it was on a mobile platform. It slides around very easy on carpet so it isn't hard to move around.
but i am sure looking at your son have fun with it pretty much eliminates the need for it to do any practical work