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A Dump Truck Adventure #10: Wheels 02

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Blog entry by George_SA posted 01-12-2019 04:39 PM 348 reads 0 times favorited 1 comment Add to Favorites Watch
« Part 9: Wheels 01 Part 10 of A Dump Truck Adventure series no next part

The next step is to cut the wheels on the bandsaw.

I used my Bandsaw circle cutting jig
The inspiration for this jig came from this YouTube video.

My jig differs from his as I made my jig for making toy truck wheels, but I used his basic idea to design my jig.
The SketchUp plan for my jig is available over here

I also added a venire scale to help cutting very precise circles. I used SketchUp to make the printable venire scales

To calibrate the scale I cut a wheel and measured the diameter with my venire. I then moved the venire scale in ScketchUp to that exact dimension and then printed the full size scales and cut them out, but did not cut the two scales loose. Then I stuck the scales onto the jig and only then cut the two scales loose after they were pasted onto the jig. I stuck protective plastic file on the scales to protect them



The next step is to cut into the blank by sliding the jig forward until it reaches it’s stop.


Then start rotating the blank to cut the circle.

My bandsaw gives a bit of a rough cut and therefore I cut the wheels slightly larger than the final diameter required. My wheels final diameter is 44mm and I cut them to 44,5 mm.

I Then use my disc sander circle sanding jig (SketchUp plan available here) sanding-jig to sand the wheels to their final dimension.
The jig has a micro screw adjustment to enable very precise sanding.


The final wheel exactly 44mm diameter.

The next step is to round the edges of the tyre on my router table

All that remains to be done is to cut the treads.
For this I used a very simple jig and my drill press.


Cutting the treads

My drill press is quite old and the height adjustment scale is not very accurate.
Therefore I made index marks on the height adjustment stop to enable me to get consistent result in the spacing of the treads.

The final wheels. I used a bit of sandpaper to smooth the router table cut (it seems like the oak and my router bit which might be getting a bit blunt did not work so well)

All that remains to be done is to spray the tyres black. To keep the paint out of the hub I cut a very precise 25mm disk from massonite to act as a shield in the hub.

Because this is a toy which must be durable, I used 8mm threaded rod for axels and nilock nuts to secure the wheels.

-- Sometimes life gets in the way of one's woodworking :)



1 comment so far

View htl's profile

htl

4328 posts in 1400 days


#1 posted 01-13-2019 03:36 AM

Great project and love all your jigs!!!

-- An Index Of My Model making Blogs http://lumberjocks.com/htl/blog/116729

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