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  1. 6th July 2016, 10:50 PM #1
    dai sensei's Avatar
    dai sensei
    dai sensei is offline Wandering in search of timber
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    Default Nectarine/Peach pips Crushgrind Shaftless Pepper Grinder WIP

    This project has been on the go for a while and I had the chance to finally finish it today whilst in Mt Isa. Here's the WIP of how it was done

    1. Eat heaps of Nectarines and peaches placing the pips in the freezer to dry. This is to ensure they dry without getting mouldy.
    2. Place pips in the oven at 120C to dry to 0%MC
    pips in oven drying.jpg

    3. Drill each pip with a small hole to ensure all pips' hollow can be filled with resin
    drilling pips.jpg

    4. Place pips in vacuum tank with Cactus Juice (with some other stuff) to impregnate them, then bake again at 120C to set resin and stabilise the pips.
    pips and pencils stabilising.jpg pips stabilising.jpg

    5. To cast I use a standard silicon soap mold that is 70x75x240mm. So to minimise resin I use a 70x70 dressed piece of pine and turn down with a central timber dowel (that is ultimately turned away) and timber "ends" that form the tenons to turn each component. The little plug for the pepper grind is formed using a hole drilled with a 50mm forsner bit
    resin saver block.jpg

    6. Sanded each pip with flats at each end to help glue and ensure pips fit in mold.
    sanding pips.jpg

    7. Each pip is then glued to the timber with CA (super glue).
    pips glued to resin saver block.jpg


    8. Place the timber with pips into mold ready for casting
    pips ready to cast.jpg


    9. Pour in clear casting epoxy resin (Megapoxy HX) tinted with pearlex (blue and purple) and tint (black). Then place mold into pressure pot at 75psi (safe working limit of my 20litre pot) for 24 hrs to set
    pepper grinder casts in pot.jpg

    10. Take mold out of pot and take cast out of mold
    casting.jpg cast block.jpg

    12. Cut off plug cast, that must be turned 90 degrees to other components, and turn components with tenons ready for final drilling and turning.
    turning cast into component blanks.jpg turning plug cast into blank.jpg cast component blanks.jpg

    13. Turn components and finish (I sand to 600 and finish with 6 coats of nitrocellulose lacquer on outside, Hard Shellac on inside)
    pips PG components.jpg

    14. Glue in Crushgrind mechanism and assemble
    nectarine pip pepper grinder2.jpgnectarine pip pepper grinder1.jpg
    Neil
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  2. 6th July 2016 10:50 PM # ADS
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  3. 7th July 2016, 02:28 AM #2
    Nubsnstubs
    Nubsnstubs is offline SENIOR MEMBER
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    Sorry about the "wants pictures". My finger got ahead of my brain.

    Beautiful. Thanks for the tutorial. That's an absolutely gorgeous outcome for a mill. My only concern is how long will the seed last before it starts oozing oils. I ask because I did a Magnolia pod once with Alumilite resin, and I missed 2 seeds. When I turned the pod, the seeds were exposed. I thought nothing of it, and the next day there was a small oil slick around the seeds.

    I also doing pretty much what you showed with very small limb sections that have little nodes that look like tiny burls. The current problem is not having the finances to get the proper resin to gitt'r dun. The forms I'm making will be hollow forms and small bowls. Thanks again for posting this. It's imagination run amok............... Jerry (in Tucson)
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  4. 7th July 2016, 04:43 PM #3
    turnerted
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    A lot of work Neil but a spectacular result.
    Ted
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  5. 7th July 2016, 05:16 PM #4
    dai sensei's Avatar
    dai sensei
    dai sensei is offline Wandering in search of timber
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    Quote Originally Posted by Nubsnstubs View Post
    ....My only concern is how long will the seed last before it starts oozing oils..
    As the pips were dried and then stabilised, plus finished product coated in lacquer, I am not expecting an issue. I have had a pen out of the same pips for a few years without issue.

    cast nectarine pips cigar.jpg
    Neil
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  6. 7th July 2016, 06:24 PM #5
    rtyuiop
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    Fantastic Neil. Makes me think about learning to stabilize and cast!
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  7. 7th July 2016, 11:03 PM #6
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    maddog 62
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    saw the grinder being finished unreal
    its set a pretty high bench mark
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  8. 8th July 2016, 12:05 PM #7
    artme
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    Just too good by half old mate!!!
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  9. 8th July 2016, 04:26 PM #8
    double.d
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    You had me wondering what the hell you were doing until right to the end . Fantastic stuff.
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  10. 10th July 2016, 10:02 PM #9
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    Tim Creeper
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    Fantabulous mate!
    Tim. A man of measurable mess.
    http://www.bushhavencottages.com.au
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  11. 17th July 2016, 08:35 PM #10
    Wood Nut
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    Thanks for the tutorial Neil. Cheers, Paul
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