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Silver bullet extreme

Discussion in 'Pinewood Derby Tools' started by Darkside, Feb 5, 2019.

  1. Darkside

    Darkside District Champion

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    Considering buying this jig. Just wondering who out there has one and what you think of it. Also wondering about the consistency and accuracy as well.

    I saw in a previous thread that there is "a trick" to using the jigs. What is the trick? What variables come into play? And when used properly, what kind of consistency can be expected?

    I currently use The Block from Jewkes, and after many hours of set up and test drills I get pretty consistent results. But even with that I only get a "perfect" drill on both sides ( testing with the 1 2 3 block method ) about one out of every 3 attempts. There's usualy a very slight variation on one side or the other. I attribute most of this to the quality of my drill press, but I think wood grain and other variables may also contribute to the slight variations.

    I have no doubt the SB Extreme is a quality tool. And I also have no doubt that it will be more user friendly than the method I use now. Just wanting to know what kind of results I can expect before I throw another $200 at this hobby. :) Appreciate any info.
     
  2. ironband

    ironband Pinewood Ninja

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    I'm not sure if this is "the trick," but a trick is to use an appropriately sized drill blank or pin gauge to "pin" the jig to the wood after the first hole is drilled. This prevents any shift or movement from the initial position while the second hole is drilled. I've not used the SB, but have used this approach when using the Clear Jig and gotten very good drills so far.
     
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  3. DerbyDad4Hire

    DerbyDad4Hire Administrator Staff Member 25+ Pro Race Wins! National Champion

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    Usually the problem lies with the drill bit. If you are getting bad drills change the bit.
     
  4. mike-E

    mike-E Pinewood Ninja

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    Yep, the drill bit needs to fit perfectly without slop. Quality drill bits seem to fit better, but you can actually use the next size up and sand it slightly while spinning in a reverse turning drill. Use 300 grit and only sand for a few seconds at a time and then check for a perfect fit.
     
  5. HurriCrane Racing

    HurriCrane Racing PWD Royalty Pro Racer 25+ Pro Race Wins! National Champion

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    Finding the right drill bit is critical to the quality of your drill with a jig. The drill jigs are worth the money if you build multiple cars a year.
     
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  6. Mojo Racing

    Mojo Racing National Contender Pro Racer

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    If you are going to spend the money to get a drill jig, spend the money to get a good carbide drill bit.
     
  7. FDM

    FDM District Champion

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    Don't they advice not to use Carbide drill bits with these jigs as it might damage the bushings?
     
  8. Mojo Racing

    Mojo Racing National Contender Pro Racer

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    use a pin vise with your carbide drill bit, not an electric drill. You won't have any problems.
     
    Last edited: Feb 6, 2019
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  9. Darkside

    Darkside District Champion

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    Appreciate the information. Placed an order for one this morning.
     
  10. Prozach2

    Prozach2 District Champion

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    DD4H has a video where he’s using a hand drill with slight pressure towards the front of the car. I was under the impression that was the best way to go.
     
  11. Sambob414

    Sambob414 Bent Axle

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    Will this jig work with the scout cars using the cut grooves?
     
  12. Thinkin'Bout Racin

    Thinkin'Bout Racin National Contender

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    It is often recommended for use with the stock axle slots. Most will recommend drilling just above the slot and then deepening the slot to the holes that were drilled. I know of some that will drill right into the slot. Either way, you are creating a path for the axle to follow that has the correct camber and toe. It really depends upon your rules.

    If needed, you can sand or cut the bottom of the car to maintain the correct ride hieght. Many will then epoxy the axles into the holes/slot. Again, it depends on the rule set.
     
  13. Castoro Racing

    Castoro Racing Workshop Leader Pro Racer

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    I prefer to fill the slot with clear epoxy and then drill.
     
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  14. 3phase

    3phase Council Champion

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    Do not use a drill unless you have verified that the Chuck has virtually no run out.
    If you have put the drill through some real work or dropped, then on top of that polished wheels and axles. Do not use.
    Took my Chuck off , scrubbed and sprayed down with brake cleaner. Still bad Chuck.
     
    Last edited: Feb 15, 2020 at 11:26 AM

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