Precision Spinning Tops

Spinny-Doo is a precision rendition of the world's oldest toy, the spinning top. Spinning Tops are mesmerizing, fun, and educational. Not just enjoyed by kids, adults too find spinning tops to be a great ornamental desk toy, a stress-relief outlet, and enjoy spinning them while on the phone, thinking, or relaxing.

Spinny-Doo Precision Spinning Tops are designed for the spinning top connoisseur who demands high performance and long spin time, but they are also elegant with smooth proportional curves, and give a very satisfactory sense of high quality.

Precision Means Performance

Being a precision made product, the Spinny-Doo Precision Spinning Top production proceses is strictly controlled to ensure every Spinny-Doo meets our high standards. You can expect your Spinny-Doo Precision spinning top to give you long spin times easily up to seven minutes, and with a practiced spin, spin times can be well over seven minutes. The current world record for a Spinny-Doo spinning top is 9 minutes 55 seconds!

We claim Spinny-Doo Precision Spinning Tops will Spin Around the Seven Minute Mark. Our packaging says up to seven minutes, but evidence shows over seven minutes. As you can see from customer contributed videos, our performance is proven. Our tops aren't designed to merely look good, they are designed to perform exceptionally well. Who wants a top that just looks good? Why not get one that looks good and actually spins well! You can have both with Spinny-Doo Precision Spinning Tops.

Quality Precision Spinning Tops

We take pride and care to ensure every precision spinning top meets our strict quality standards. Each precision spinning top you receive is evaluated for both performance and asthetic qualities. We would rather scrap a spinning top than sell an inferior product.

Spinny-Doo Precision Spinning Tops are World-Famous

We have been providing Spinny-Doo brand precision spinning tops to customers all over the world for nearly six years and have a substantial following of extremely happy customers. We frequently get emails from our customers telling us just how much they love their new spinning tops, and and very often get new customers who heard about us by word of mouth.

Spinny-Doo Precision Spinning Tops For Your Desk - Executive Desk Toys

Spinny-Doo is visually very elegant and proportionally designed - an excellent ornamental addition to your elegant pen, lamp, and ornamental picture frame. Our customers tell us how the Spinny-Doo on their desk never sits still. People are always coming by to give it a spin and see how long it goes.

Spinny-Doo Precision Spinning Tops For Fidgeting

While not strictly a fidget toy, Spinny-Doo Precision Spinning Tops are for fidgeters. There's nothing more satisfying than spinning a Spinny-Doo while on the phone, thinking, or relaxing. Your colleagues will start showing up at your desk more often just to get a chance to play with your precision spinning top. Don't be surprised if you don't get your Spinny-Doo back again!

Spinny-Doo Precision Spinning Tops Are Toys For All Ages

Yes, Spinny-Doo Precision Spinning Tops are Toys. But that doesn't mean it must be for kids! We find that men between the ages of 18 ~ 55 find Spinny-Doo Precision Spinning Tops incredible to watch and play with because they appreciate the underlying physics of spinning tops and know that beyond the simple exterior lies complex mathematics that explain how the gyroscopic effect of spinning tops defies gravity and stabilizes them during their spins. Kids learn the principles of gyroscopic motion and precession all the while having fun seeing who can spin theirs the longest.

Spinny-Doo Spinning Tops Are Made in Canada

Spinny-Doo Spinning Tops are Proudly and Exclusively Made in Canada. Spinny-Doo is a small private family owned business run by one man, yet "we" still speak in the general plural corporate entity sense because it sounds better for marketing ;-) Here, "we" design, manaufacture, package, ship, market, draw, and dream about Spinny-Doo Precision Spinning Tops. We do all this right here in Canada, and we're very proud to say our products are "Made in Canada"

Spinny-Doo Spinning Tops Make Perfect Gifts for Men. Gifts for Him

Buy a Spinny-Doo Precision Spinning Top Online Today and give the gift of spinny-doo precision spinning tops to a friend, loved one, colleague, or give them out as prizes or tokens of appreciation from an employer to an employee. They also can be marked with a corporate logo or slogan and given out as a marketing tool or marketing gift. Spinny-Doo precision spinning tops are high-quality, elegant products that make gift-giving so easy.

Spinny-Doo Spinning Tops are Great Christmas Gifts Ideas

Christmas is just around the corner! Buy a Spinny-Doo Precision Spinning Top Online Today as a Christmas Gift (even a belated Christmas Gift)

Motorcycle Brake Disk and Hub Adapters

Customer asked me to make him a couple of brake-disc adapters and hub adapters for his motorcycle restoration project. Looked like a fun project!

 Brake Disk Adapter Model - Outside Face Brake Disk Adapter - Inside Face
Hub Flange Nut Model Hub Hex Nut Model


Starting with a 3D model provided by the customer, I generated CAM toolpaths to estimate the time it would take to machine and provided him with a quote.

Estimated machine time was initially thought to be 3 hours per brake-disk adapter plus about an hour to finish the other side on the manual lathe, and about an hour each for the hub nuts.

Using Fusion 360, I set the brake disk adapter in a block measuring 7 x 6.5 x 1.25 and started modeling toolpaths.

Using carbide cutters (for aluminum) I had on hand and selecting a diameter that balanced material removal with the need to get into the small areas between the bosses and the wall, I chose a 3/8" 3-flute aluminum endmill for the roughing pass. My mill isn't the greatest or most powerful either - only 3HP and 4k RPM, which limits the material removal rate for this diameter. I tried and tried, but couldn't get the time below 3 hours without pushing the small cutter beyond my comfort level.

The roughing pass initially calculated to 45 minutes or so, but was later slowed down even further. In fact, every estimate I came up with had to be extended by about 33% to prevent from breaking cutters or shifting the material. It's one thing to cut tens or hundreds of parts and to ramp up as one learns, but I only had one shot at this and the material (7075) was expensive - about $110 apiece, so I took it slowly.

Roughing Pass

45 minutes

 Roughing Pass

 Rough the center bore (will be turned to dimension from the other side on the manual lathe)

Bore Center
MIlling the outer bolt holes with a 3/16" HSS endmill Mill Outer Bolt Holes
Minor roughing with 3/16 endmill Minor Roughing
Milling out cylindrical pocket with 3/16 endmill Roughing out cylindrical pocket
Chamfering contours and holes with 3/8 90-degree drill-mill chamfering contour
Chamfer bosses with 3/8 90-degree mill/drill chamfer bosses
Spot-drill with 3/8 90-degree mill/drill spot-drilling
Fine detail finishing with 1/4 ball endmill fine finishing with ball endmill
Finish (mill) corner radii inside cylindrical pocket with 1/8 ball endmill finish mill radius on cylindrical pocket
Finish mill the radius on rim shoulder where sits a seal finish radius of seal shoulder

Drill M8 bolt holes

(had to be done separately from above because of limited Z height)... time for a modern mill, I'd say.

drill M8 bolt holes
Initially would mill the pocket for cap screws, but customer changed this to a drilled hole with X drill. Used the previous  drill operation in its place. Mill pocket for cap screws
Final operation is to chamfer all remaining contours, bolt holes, etc. Those in the middle (shoulder and bore) were done on the lathe and later removed. Chamfer of contours, bolt holes, etc.


With the bulk of the operations above simulated, I was able to provide an estimate of the overall job (which included the time to set up these CAM operations.) My customer understood it would take time, but some customers don't realize that quoting jobs actually takes time and costs money.

With several emails back and forth to show the effect of the toolpaths and an esimate of the final costs, the customer committed sent an initial payment (50% to cover materials and time spent.)

Sourcing 7075 aluminum in this particular size (7 x 6.5 x 1.25) proved to be expensive since it did not fall within the dimensions of ordinary bar stock and had to be cut from plate. I had some pretty wild quotes from local suppliers ranging anywhere from $480 per piece down to $75 USD/per piece for large off-cuts from guys/shops off ebay.

We eventually settled on supplier from Quebec who offered $92 CAD/pc + $15 material report + $19 shipping + tax. Total material for the two pieces came to approximately $244, all in.

While waiting for the material to arrive, I developed a similar, smaller model to run on a piece of 6061 I had lying around. This was to test cutting speeds and to get a feel for the finish quality. After running the test, and breaking my only 1/8" endmill, I made some final adjustments to the customer's CAM model and was satisfied that I was prepared.

test operation finished test piece

A week later, the material arrived and was cut 1/4" over the dimensions requested. I had to spend more time either trimming the parts to the modeled dimensions, or re-adjusting the CAM models. I chose the former and spent another hour milling the stock to the modeled size.

trimming stock to match the model

If you're wondering what the plastic is for, it's a vinyl shower curtain on a hoop-shaped rod surrounding the milling machine head that I can pull open/close to keep chips from flying everywhere. Ugly, but effective.

And finally, the real work begins:

And so it begins...

This is always a frightening moment - one little mistake, and I have a $100 doorstop.


Spiral in and work outward

At this point, I know things are going to go well because it has finished ramping down in and is now cutting full load toward the edge. Fusion adjusts the feed throughout the program to ensure load on the cutter is consistent. At this point, I just follow the cutter with the shop-vac for the next four hours.

Starting to contour

Lots of material coming off right now. An enclosure and chip conveyor would have made this operation a little more relaxiing, but sometimes mindless work (vacuuming, sweeping, turning stuff on a manual lathe) is a good way to take a load off.

Roughing op continuing down to the next layer

During the last bit of the roughing operation, it increments downward to rough away some finer detail.

Last of the roughing op - doing a bit of rough detailing

Roughing op complete

At this point, the roughing op is complete but on the next op, the 3/16 cutter was floating above the workpiece by about an inch. Seems when doing the tool heights I moved the decimal one spot too far to the left. It could have been worse and plunged into the material, breaking a cutter or worse, ruining the workpiece.

Fortunately, I just reset the tool height, re-ran the CAM generator (minus the roughing operation) and continued on my merry way.

I missed a bunch of shots at this point because I was hyper-focused on the operations to make sure I didn't screw up anything else.

Chamfering the contours

You may notice the fine detail milling around the bosses. You didn't miss much - just a couple of hours of very minimal material removal. Up until this point, I had just closed the curtains and let run until each new tool change.

Notice too the cylindrical pocket doesn't have a broken-off 1/8 endmill stuck in it :-)

Completed first half

This is the result of the first half of the part and and four hour's worth of machining. The outside contour could have been improved with a finishing pass, but this was my very first attempt using Fusion and it was a struggle to get it this far first time around.

Linux CNC toolpath

What it looks like from the Linux CNC view. The overall program was 4.5 megabytes (iirc) and took a good minute to load. I was afraid it would puke, but Linux CNC is actually quite robust and dependable.

Fixture for holding the adapter

This brake disk adapter was actually quite difficult to hold. I thought initially I would hold it using the seven outer bolt-holes, but I ended up using the threaded stand-offs instead. Here I'm machining a fixture to put in the four-jaw chuck. If you notice the 0.16" offset from center, yeah... I couldn't figure out how to center the part within the stock. Until after I gave up, that is. The trick is to set the origin and click on any circular feature, then suddenly the stock centers on your model. Instead, I had to center it using the four-jaw. Same diff, but now I have a bunch of offset holes in what was otherwise a perfectly good chunk of 1015 steel.

roughing away

Here, the adapter has been mounted and centered in the four jaw using the seal shoulder as a reference. Next, a hole drilled and bored as close as possible to the inside bore, then centered again using that reference. Finally, the material from the rectangle is carefully turned until round. On the second piece, I saved a lot of time by trimming the corners on the bandsaw. Should have thought of that first.

getting closer to form

This often happens... I actually finished the first piece and forgot to take photos. I get so focused on the task... and this piece was intricate; the designer just had to make everything radiused, which meant I had to calculate the start and stop of every radiussed corner, turn up until those points, then create and blend the radii. I just didn't have time to take photos. I also drastically underestimated how long it would take to turn the other side of this piece because of those radii. I finished the second half of part #1 in a few (maybe three ~ four?) hours. The second piece went a lot faster. I did the second half of part #2 in under three hours. Another few hours lost to optimism.

finished piece before being removed

Here I'm taking a photo of the completed part (completed lathe-work, anyway) before removing from the chuck. Last operation, again not photoed, is the chamfering.

Chamfering the second side is where I finally figured out how to center the stock in Fusion 360. Until this point, I was performing an air cut and noticing it wasn't following the contours. When I finally figured one can click on any reference in the model to adjust the origin point, the next generated GCode program properly followed the contours. I then gradually lowered the Z height until the mill/drill met with the edge of the part, watched it follow the contour exactly, then set the Z to the surface of the part and watched Fusion perform a perfect chamfer.

Takes a while to gain confidence in software driving one's machinery, but at this point, I am confident enough to trust Fusion will do what I tell it.

Hub adapters  hub adapters view #2

I apologize again, but somwhere in there, I banged out the two hub adapters and forgot to take pictures.

The whole project:

Completed project

And a few more shots graciously provided by the customer:

customer layout shot


adapter on wheel

The adapter on the wheel


disc brake and hub-nut adapter installed

The disk brake installed along with the hub adapter flange nut.

Shiny metal glamour shot

Nice glamour shot


happy customer

And one happy customer (left.)

Until next time, keep spinning.



Leave a comment

Name .
Message .

Please note, comments must be approved before they are published