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Thread: Looking for best methods for making Point Form Dies accurately every time

  1. #21
    Boolit Master
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    Quote Originally Posted by Traffer View Post
    I am not familiar with that attachment. What does it attach to? Is is infinitely variable in order to set it up for bullet point tips?
    It is an old tool designed to sharpen drill bits. It holds the bit at an adjustable length has an adjustable angle. The bit held in place swings across a grinding wheel in a sweeping action grinding off enough to renew the cutting edge. It is what you are doing by hand and by eye. My thought was just increase the angle going to a point. I will check mine put and see if there any any problems doing this. This old tool is the best cheap way I know of to sharpen drill bits short of a very expensive commercial sharpening system. Since the bit length is held in place by the tool both the flutes are cut equal.
    Here is one in operation:https://www.youtube.com/watch?v=N-bamSFY3mc

  2. #22
    Boolit Master
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    This tool will not grind a curve or ogive. If you were very good with it I imagine you might be able to grind a truncated cone. It would need to have a step with a face like an end mill after the conical tip then another angle for the bottom of the bullet.
    As far as grinding regular drill bits, Once you get the hang of doing them by hand it is faster than using a machine or jig to hold the drill. I have been doing very small work all of my life. I am to the point that I can sharpen a .05 MM drill bit by hand. I use eight power glasses or a 10 power loupe for those little guys.
    Grinding tools is a very fun challenge for me. I recently ground a drill bit from a piece of drill rod ...by hand without a jig.
    I have also ground end mills. Not good enough to grind reamers. I can however stone them.
    It saves a lot of money. Especially when a person can buy dull end mills for next to nothing....I look on eBay for used carbide end mills that need sharpening.
    I can't do as good of a job as new but I get them to work well for me.
    Last edited by Traffer; 07-10-2018 at 03:37 PM.
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  3. #23
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    GONRA's Eccentric Spindle Indexer Tooling is "just that". RADIAL RELIEF!!!

    You would to have to ADD ogive FORM tooling.
    "You never get something for nothing"..
    Last edited by GONRA; 07-16-2018 at 06:42 PM.

  4. #24
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    Quote Originally Posted by GONRA View Post
    GONRA's Eccentric Spindle Indexer Tooling is "just that". RADIAL RELIEF!!!

    You would to have to ADD ogive FORM tooling. "You never get something for nothing"..
    The tool I was referring to in post #22 is the drill bit sharpener mentioned by Dragonheart. My post was to emphasize the fact that it was the ogive that was the difficult part to grind. And indeed it is. As Gonra knows, grinding curves requires more sophisticated jiggery than comes with a typical drill bit sharpener.
    AKA hans.pcguy

  5. #25
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    [QUOTE=Traffer;4408155]This tool will not grind a curve or ogive. If you were very good with it I imagine you might be able to grind a truncated cone. It would need to have a step with a face like an end mill after the conical tip then another angle for the bottom of the bullet.

    Actually, what I am interested in is swaging cast bore rider rifle bullets, which would have a truncated cone. It would appear this would be an easier forming die to make. My quest is to reshape a cast bullet to make it concentric.

  6. #26
    Boolit Master
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    [QUOTE=Dragonheart;4419076]
    Quote Originally Posted by Traffer View Post
    This tool will not grind a curve or ogive. If you were very good with it I imagine you might be able to grind a truncated cone. It would need to have a step with a face like an end mill after the conical tip then another angle for the bottom of the bullet.

    Actually, what I am interested in is swaging cast bore rider rifle bullets, which would have a truncated cone. It would appear this would be an easier forming die to make. My quest is to reshape a cast bullet to make it concentric.
    As I understand it, a bore rider is a banded bullet. It would be insanely difficult to swage a banded bullet. You would need a multi piece die setup. It is hard enough to make the heel on a 22 rimfire. I would suggest instead of swaging your boolits, you look into cannelure tools and knurling tools. They could be modified to roll the bands into the bullet and the rolling action would also "round up" the diameter to a concentricity. Here is an example of one that Corbin makes. I believe it would be possible to change the engraving roller to rollers with bands to make the desired boolits. Corbin states that this machine will knurl only soft lead. So I would imagine that since the groove bands would require considerably more pressure to form, the machine itself would have to be redesigned to be stronger and have more leverage. But I have no doubt that it would work. http://www.corbins.com/hct-2.htm
    There are also roll sizers for brass. In my opinion these could easily be modified to roll consistent, concentric bore rider bullets also. In fact I am in the process of making a similar machine that will crimp 22lr rounds. Commercial 22 rimfire is crimped, knurled, and final sized on similar machines. They use rotating ones like Whiteheads design that are larger but same principle. Here are a couple of videos, you can see how this would work. Unfortunately they are expensive and would be hard to build on your own. I don't have a milling machine and trying to make something like this with files, hacksaws and a drill press is proving to be extremely challenging. Now I could be wrong about these type of machines being able to produce bore rider boolits. But it seems logical to me.
    https://youtu.be/7NrKOTFoOrM
    https://youtu.be/PMgy4ur2FT0
    https://youtu.be/aPiK06wIS68
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  7. #27
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    I just have to ask, banded before swaging? or banded after swaging?
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  8. #28
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    Dual diameter (bore rider) point form die would not be that difficult to make or use. The length of the riding (smaller diameter) portion would be constant but the larger diameter of the base of the bullet would change depending on weight of bullet.

    Sure it would take a custom reamer but that isn't difficult. Or it would be as simple as....... for example a 30 cal bore rider..... you need a .300" point form die and then bore/ream the first part of the die up to .309"

    Fairly simple design to put together for swaging lead boolits.

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  9. #29
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    Quote Originally Posted by BT Sniper View Post
    Dual diameter (bore rider) point form die would not be that difficult to make or use. The length of the riding (smaller diameter) portion would be constant but the larger diameter of the base of the bullet would change depending on weight of bullet.

    Sure it would take a custom reamer but that isn't difficult. Or it would be as simple as....... for example a 30 cal bore rider..... you need a .300" point form die and then bore/ream the first part of the die up to .309"

    Fairly simple design to put together for swaging lead boolits.

    BT
    I was assuming more than two bands. I believe that would require something different. But I really no nothing about bore riding bullets.
    AKA hans.pcguy

  10. #30
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    Quote Originally Posted by clodhopper View Post
    I just have to ask, banded before swaging? or banded after swaging?
    If there were to be a band of smaller diameter in the middle, it would be difficult. I believe that the rolling would be the last step after swaging.
    This is all hypothetical. I have not made anything like this yet. I make 22lr swaging dies and and am in the process of making a roll sizing type of crimper.
    BT Sniper is the expert on machining and swaging. He has the experience and tools. I am a noob with a lot of ideas, very few tools and crude uneducated techniques.
    AKA hans.pcguy

  11. #31
    Boolit Master

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    From years of experience grinding tools and job shop machinist.

    The basics are to dress a radius on a grinding wheel, then spin the tool and press it to the grinding wheel.

    A simple radius is the easiest way...you can even make your own tool to swing a single point diamond dresser to create the radius.

    A toolpost grinder might work....a surface grinder is what we used in shops where we had one, a tool and cutter grinder when I worked in a tool and cutter grind shop. I'd probably rough turn, flute, heat treat, then spin the form on.

    Once you have your form you can black it up with a sharpie and back it off to a hair land, most shops I have worked in had one of these...

    https://portal-images.azureedge.net/...pg?w=540&h=360

    The tool could be held in a vee block and the angle set (7 degree primary usually) and you work at it carefully by hand until just a hair of the original form remains. Thinking out loud here I bet a small belt sander could be carefully used the same way.

    For ease of getting the form clear around to the pilot, I might make the pilot fit into a hole through the center, so you can remove it to create and sharpen the tool, then slide it in later.

    Any helix greatly complicates things...straight flute will be easiest.

    There was a grinder type made that was perfect for all of this stuff.

    http://img0112.popscreencdn.com/1622...grinder-w-.jpg

    They are floating around out there in the world in a variety of types and sizes, the "deckel" was a tool used to make molds I think...the grinder shown is made to create a D type cutter, single lip, but many had indexing to address multiple flutes
    Both ends WHAT a player

  12. #32
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    It also might be possible to turn an aluminum lap to the reverse form, charge it with abrasive, and use it to lap the form perfect. Spin it just like you would a grinding wheel, but slower (like 100 rpm might be a good start). I have made a few laps like that to create a radius on steady rest fingers and they cut very rapidly, worked way better and faster than I would have thought . The lap could be rotated with the lathe spindle, the tool spun with a 5C spindex bolted to the compound. The beauty is once you have a way to create the form, why not make 2 or more tools in a batch not just one ?? Use one to rough ream, then one finish...you always have the lap to make more tools. I'd make a roller to charge the lap, maybe mount it in a single knurl holder like this, the idea is to press the abrasive into the metal the lap is made of.

    https://a011.geccdn.net/lp/275x275/TRS_3230001.jpg

    Bill
    Last edited by Willbird; 08-22-2018 at 09:38 AM.
    Both ends WHAT a player

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check