Drill Indexing jig for small parts.

219
19
Boys and Girls,
 
I am less hesitant in posting laser cut jobs as the menagerie of laser owners reach overpopulation in my mental census, than I was before that mental onset and lack of medication.. 
 
This was posted on LJ on 12th. March, 2017 before “Boys and Girls” were invented and the WOKE brigade decided to herald their demise. 
 
I haven’t vetted it, so please forgive me for any inappropriate presentation that LJ may have missed.
At least it gives me the opportunity to amass my garbage here, before the unfortunate need arises to post on another forum in the future.
 
A quick fast track to a video I made (soly hhit, 8 years ago, before I went senile(r)),

without yazall having to suffer the stuff below… though the degree of suffering between the two options is open for conjecture... however, the animal nightie LIVES!

I think (occasionally, and it's been another 8 years of cheap vino consumption) this is the link to the 3DW model,

 
 
----------------------------------------- ooooOOOO From LJ OOOOooooo --------------------------------------------- 

 
One of my passions is T&J model toys for which the requirements call for drilling a number of small holes, ranging from 3 to 20+ over a small circumference to simulate nuts etc… on vehicles' rims.
 
While I have the luxury of a laser that makes life easier for me, my meds mush have kicked in and gone into overdrive forcing me to come up with a "manual" means of achieving this particular swiss-cheese affect in the aforementioned little bits of timber.
 
Starting with SketchUp, I designed a very basic jig,
cut it out on the laser, assembled it and realised I needed more medication as I was so far off the mark that my bulls eye was the size of an ants eye  (??? yeh… me neither… must be the meds). So back to the drawing board and finally evolved an acceptable configuration that was buildable by even me.
 
I needed an indexing mechanism and came up with a spring loaded ball bearing which engaged holes laid out in an organized fashion along the circumference of a circle.  After many futile attempts I finally achieved that goal.
 
This was then followed by the comical picture of me crawling across the breadth and width of my workshop trying to track down those little ball bearing suckers that were turned into non directional missiles by the mishandling of the compression spring whose sole purpose  was to control the entire mechanism and not impersonate a lethal ballistic weapon.  No sooner I found that obnoxious ball bearing, I managed to launch the spring into a non-accessible (which was always the case when I managed to observe it's irrational trajectory) part of the workshop.  Because of their small size I tried replacing the 8mm ball bearings with tennis balls but for some reason the fur on the tennis balls hindered smooth operation, so with hesitation, I surrendered that ingenious piece if inspiration.  After bulk buying a heap of 8mm ball bearings and exhausting our local supplier's supply of small springs I finally managed to assemble the unit.   I wanted to super glue the spring and the ball bearing so they wouldn't fly off, and if they did, they'd stick together, however, I managed to super glue my fingers together so I abandoned that pragmatic circumvention and proceeded to further bolstered my stock of those 2 under estimated perishables.
 
In the gallery pictures, I have tried to display what the jig can create and here is a link of how NOT to present a video of the jig in use, if you don't want to beffudle your audience.
 
If you find you are/were going to sleep watching the video, watch the next few pictures at a more leisurely pace.
These are the components of the jig.  Check out the 8mm ball bearing perched precariously on the spring.
 
"3, 4, 6, 8 and 24" configuration index wheel bolted into place with the "5, 10 and 20" indexer lurking in the background waiting to pounce.
 
Packer to straddle washer and 1/2 nut.
 
A well traveled "zero clearance" insert mounted.
 
Unfortunately I could have saved myself a heap of grief by just staying faithful to my laser and left the jig on the drawing board… (just kidding).
 
A novel addition to the jig was a ¼" to 8mm (or 5/16" in Yankee speak) packer/sleeve printed on my 3D printer.  T&J models are designed with either a ¼" or 5/15" axle diameter that in the past required 2 different sized spindles for fabricating wheels and rims.  With these little sleeves  I can use ¼" bolts for both sizes.  I have made various lengths of these packers to use as required.
 
Another feature of the jig is the cutting of the indexing wheel as a 250 toothed gear shape to simulate an easy to handle knurled knob.  The wheel eventually worked even better after I sanded the teeth off because the small teeth hurt my delicate hands… (just gagging).
 
While the laser has made the indexing wheel a simple operation for me, a good compass, keen eye sight and a sharp drill bit will keep you amused for many a days before you seek out a laser cutting organisation to cut an accurate one for yourself.
 
PS.  Late extra.
For anyone interested (in the concept) finding the right spring can be a nightmare.  To get you started, this is a picture of the spring's specification,
at least the specs on the packet may be a good starter.  The spring is ‘countersunk' through 2 layers of 6mm MDF… for all you non mathematicians … this is 12mm (even for large values of 6).
 
PPS. For those with eyesight as bad as mine, the measurements are 1/4  x 1-3/8 x .20… the spring that is… not the bag.
 
----------------------------------------- ooooOOOO The End OOOOooooo ---------------------------------------------
 
 
Don’t be crafty  Craftisians,... SHARE  your craft!
 
 

If your first cut is too short... Take the second cut from the longer end... LBD

19 Comments

Oh so that's where you get springs from!
No BIC pens were harmed in the making!

Regards Rob

Very clever especially for a duck !!
Never thought of BIC pens... A little birdie told me that the biro was invented by some Hungarian layabout... may be a distant cousin and I could be a billionaire if I actually acknowledged my wog affiliation.
My middle name is László, though I go by Leslie in case the cops are following this thread... that's why my parole officer calls me ALKI, but I spell it with a "!".

Thanks Be'49.

If your first cut is too short... Take the second cut from the longer end... LBD

Nice write up ducky!

Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".

Nice jig Duckie....and well described

Mike

Very handy!

One nice feature of any laser is accurate placement of marks for later use. I'll often use one to place starter dimples on a project so the bit has a place to register before drilling (like my cribbage boards). Small bits will always bend away slightly from a simple pencil mark in favor of a softer wood grain. The actual dimple gives it a pre-bite hole for accuracy.
A nice and pointy nail set also works, but then you need a good eyeball to get that aligned.
Very cool. I won't show any of my hack jigs now. :)

Darrel

Real handy jig, ducky!!!!

Cheers, Jim ........................ Variety is the spice of life...............Learn something new every day



I was aware that you were quite wealthy, that's the reason I keep in contact with you.
Its always good to have wealthy friends that share their skills and knowledge.
Legend has it that Ferny Grove here in Brisbane was named after your family
In fact the shopping center was sold recently for $16 mil



The creation of the ballpoint pen is usually credited to a Hungarian-Argentinian inventor László Bíró, whose name inspired a catch-all term for modern ballpoints.

Sometimes people change their names to disguise who they really are.

The specific salary for the CEO of Biro is not publicly available. Biro is a private company, and as such, the compensation of its executives is not typically disclosed to the public. 
I am estimating somewhere between $15 to 25 Mil annually
That should be keeping you in good shape, ... and a spring in your step!

Zzzzzzzz!



Hint Hint!

Regards Rob


Thanks guys for looking... I found it very handy for my T&J models, however, cannot for the life of me adapt it to puzzles... yet.  May have to get back into the models.

RC, uncle  László  has pulled in the reigns since he discovered people were pilfering his springs for nefarious deeds, which took a lot out of my steps and my philantrophy to friends... sorry... banks won't accept cash and I only have $1,000 notes under the mattres.

Bang goes Pottzy' NASA accusations... however, The Donald can now openly reclaim and exert hid dictatorship on another segment of Yankeeland



 Foghorn
 commented 1 day ago
Very cool. I won't show any of my hack jigs now. :)

No such thing as a unique hack jig, all jigs are a hack, the laser only makes it repeatable, yet not too many make more than one of a kind.
How the jig is made is immaterial... ok, out of material, however, they will always give others ideas for their own sordid foibles. 

If your first cut is too short... Take the second cut from the longer end... LBD

I love the edgenuity Alex making an easy repeatable process 

Life’s Good, Enjoy Each New Day’s Blessings

Thanks crowie... it's the even edge that I strive for....

If your first cut is too short... Take the second cut from the longer end... LBD

Hey there LBD. . . .great post.  May I add one thing about T&J axels?   I use 1/4" no matter what.  I never screw around with the 5/16" because it usually makes little or no difference.  All wheels get a 1/4" axle.  I'm lazy!   :-)    Again, thanks for a terrific post and quite a few chuckles!   You da man!   Oh - - - and Dutchy, if you are reading this, I use 1/4" axles in your great models also.  :-)

Thanks Papa... When I started with T&J models, I went ape over spare parts as we don't have the crazy imperil dimensioned stuff here and I found that as soon as i start mucking around with measurements I start to wallow in shit.  So I tend to stick to the written word

I have this phobia for spare parts and when I need something I want it NOW and not in Amazon's 1 day delivery or a 1 hour drive to my local Bunnings H/W store.  So I tend to stockpile,

and where the hell else can a rational metric society use imperial dowel garbage.

If your first cut is too short... Take the second cut from the longer end... LBD

Fun thing about those imperial dowels. Usually the dimensions are so sloppy they line up with nice and even metric integers!
Gotta buy the metric from the same places to get a nice fit for standard imperial fractions...
Alex and Splinter. . . you are spot on about the sloppy imperial products that are out there.  Since getting in on building Dutchy's plans, I have become quite a metric follower in an imperfect imperial world.  So I now have sets of Incra rules in both, set up blocks in both, and so forth.  I find metric a hell of a lot easier to use in many instances.  But since I have easier access to Imperial, I do use it.  I have made a dowel jig (modeled after one made by Ken on ACUTABOVE WOODWORKING) for accurate metric and imperial.  But that still leaves me with the axles. . .the sloppy 1/4 dowels available get trued up to my brad point drill dimension and I move on.  And I do understand Alex's distain of waiting for something to be delivered.  We all, I think, have the same impatience.  Oh how twisted the artistic mind is!   Rahahahahahahahahahahahahaha.   G'Day, gents.
Actually the main reason I hate imperial is that when Aussieland went metric, I gave away all my imperial measuring devices... and I had a lot.  Then when my woodworking experience advanced, I started importing a bucketloads of Yankee stuff not available locally... and it was all bloody imperial...  AND I had to re-buy all my imperial measuring tools, no one was prepared to return their "indian gifts".

If your first cut is too short... Take the second cut from the longer end... LBD

Top shelf stuff Duck. I like it when I get the spinnny point headed in the direction of my target, to actually be able to map it out, and say RAT Cheer, is more than my mind can deal with. Plenty of CNC and Laser type toys out there, but being able to make them sing and dance to your tune is the work here. Nice job buddy. It is so nice seeing you back.