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grundlman

3D Models Of Hooks

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Anyone know if there is a resource out there for 3d models of mustad hooks. I am fairly proficient with rhino and have some designs created but without an accurate hook model it will do me no good. I have reached out to mustad and they have told me they do not have such a thing. I talked to one company about scanning them in but that was waaaay out of my budget. 

 

I am thinking of just winging it on my own but want to see if anyone else has went down this road before I do.

 

Thanks

Grundlman

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I might be able to help. What hook number?

Mine don't have points on them. If your proficient in Rhino, you could draw them, but I would be glad to help you if I can. I drew mine in MOI, I think this program was created by the guy that wrote the program for Rhino.

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I don't know of any sites that have 3d solid model files available to us. I make my own. The only thing my hooks don't have is the barb under the hook point. Mine are true parametric solid models. I have a few done, I would be willing to help as well. See attached file below, is this what you are looking for? Also this solid model can be put on a drawing and I can extrapolate all the dimensions from it.

Publication2.jpg

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Publication2.jpg

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Publication2.jpg

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Those are exactly what I am looking for. I am just interested in having the proper diameter and bends in order to make a new mold. I am looking to use the mustad 32768 or 91768 in 3/0 and 4/0 for my new jig heads.

 

I am in no way proficient in rhino, but I can do decent and we have some interns that are good at it.

 

If no one has these I will share if interested once I make them.

 

Thanks for all of the help and support.

 

Grundlman aka Jason

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So you want the hook to make the slot in the mold, boolean subtract?

I have some scans of those hooks and would have to draw them. 

On hook diameter do you have a way to machine the hook slot bigger so the hook will fit? I usually draw the hook .010" bigger diameter so the hook fits better.

What file format? I would guess a stp file would be best.

Unless someone else has one of these already, I could draw one and send it to you to see if it works.

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If its a hook I have on hand I just measure it and plan my cuts using simple 2D CAD/CAM.  If its not a hook I have on hand I ask the client to send me a half dozen of the hook they want to use, and I ...   I just measure it and plan my cuts using simple 2D CAD/CAM.  

 

If I am working with a hook that has no straight lines (shank eye stem etc) to reference from I lay it on a piece of graph paper and take a picture from exactly overhead.  Then I import the image into my CAD software and scale it until it matches the layout grid of the CAD program.  From there its just a matter of drawing it.  Believe me it takes longer to describe than to just do it.  

 

Also, remember that you do not have to accurately place the entire hook in most cases.  Just where it exits and enters the mold cavity for a short distance.  Beyond that it can lay in a wide open oversize pocket.  

I'm either too lazy or not smart enough to do it that way :nuhuh: All I want to do is push a button. :yeah:

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I am prepared to take on the task of modelling ALL the hooks and making available CAD files. The formats that I have available are:

 

CATPART, STL, IGS, MODEL, STP, 3DMAP, 3DXML, CGR, HGC, VPS WRL.

 

All I am asking for this service, is that those of you with Vernier calipers or other accurate measuring tools, take seven measurements and post them in this thread along with the part name and number. The measurements I require are shown in the attached image. A photo would be a bonus, but not necessary for the job.

 

Measurements can be metric or imperial inches.

 

Dave

Hook EC-777-4.JPG

Hook EC-777-4.JPG

Hook EC-777-4.JPG

Hook EC-777-4.JPG

Hook EC-777-4.JPG

Hook EC-777-4.JPG

Hook EC-777-4.JPG

Hook EC-777-4.JPG

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Edited by Vodkaman
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I am prepared to take on the task of modelling ALL the hooks and making available CAD files. The formats that I have available are:

 

CATPART, STL, IGS, MODEL, STP, 3DMAP, 3DXML, CGR, HGC, VPS WRL.

 

All I am asking for this service, is that those of you with Vernier calipers or other accurate measuring tools, take seven measurements and post them in this thread along with the part name and number. The measurements I require are shown in the attached image. A photo would be a bonus, but not necessary for the job.

 

Measurements can be metric or imperial inches.

 

Dave

 You are very generous.

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ok here is a drawing of 32786, 8/0 down to 4/0. Dimensions are in inches. I traced around the outside of the hooks. the grid underneath is is 0.100" x 0.100"

This was drawn in code or a test, so you will have to study to figure out what I've done. Let me know if you need clarification. 

the other is a pic on the same grid paper.

Both of these pics are made to actual size and should print actual size, it does on mine. My photo editing software will size it to actual.

I have a good 3d file on the 8/0 file. I also have 7, 6, 5, 4/0's but I would have to double check those. I can do these pretty easy and will help. I have a lot of different sizes of hooks in Mustad, and Eagle Claw.

32786_01.jpg

32786_Drawing.jpg

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32786_Drawing.jpg

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The shape of the bends is more complex than I anticipated, appearing to be eliptical rather than radii. As the point of CAD models is to be able to use the data for possibly machining, it is critical that we model these bends and the barb as close as possible, to avoid expensive mistakes.

 

I have therefore added more dimensions for the hook bend, required to help me model with more accuracy. Once the numbers are in, I can return PDF files for overlay.

 

I have constructed the dimensions so that they are convenient to measure, to the outside of the hook. Attached is a table of dimensions to make the job of data collection easier for us both.

 

Dave
 

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Excellent points Bob, I appreciate you taking the time.

 

As you already know, I use parametrics. So once the basic design is done, it is just a matter of entering the numbers. In fact, although the two hooks above, 32786 and 91768, look quite different, I was able to use the same parametric model to get a result. Now that the main design work is done, it is about five minutes per hook to produce a 3D model, a drawing, PDF and a JPEG.

 

I hope a few more members get on board with this idea, but I suspect it will wither away, like the lip template service that I offered a few years back.

 

DAve

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I would like you to mic the point to barb tip length and have a stab at the max rad dimensions, as shown on my PDF. One or two dimensions were missing, but enough there for me to have a stab at.

 

I got your email. Sending a reply now.

 

DAve

I know you need all of them but which one first? 90768-3/0?

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For anybody making molds around these models....

 

1.  Not every hook in a box is exactly identical.  That's why when somebody asks me to make a mold to accomodate a particular hook I ask for half a dozen samples of the hook they want to use.  

 

2.  While I think .010" is too much clearance for a hook some clearance is necessary.  .003 to .005 seems to work for me depending on the hook design.  It doesn't tend to flash significantly, and allows for a little variation of the hook.  Don't cut a slot that is an exact relief of the hook.  You will eventually wind up with a wider slot anyway from forcing the hooks into it.  LOL.  Also, its much easier to cut a larger clearance area where the hook does not directly interface with the bait.  Only cut a slot for the hook where it exits the cavity for a short distance, then cut a much larger pocket for the eye and barb that is the depth of the hook radius on each plate.    

 

3.  The curve of the hook is quite complex probably being bent on something the equiivelant of a spring making machine, and springing back slightly.  Any variations in the alloy or even in the pretreating processes for the wire can affect that.  They can get very close, but not perfecty identical on every hook.  Also, any processes used after bending like work hardening in a press or heat treating in a furnace can cause minor fluctuations.  

 

4.  Take all of this with a large dollop of salt.  I've ony been half serious about learning metal working for about six (6) years, and all of my knowledge is self taught from books, the internet, or mistakes in hands on experiments.  

 

Vodkaman,  I believe you have undertaken a monumental task, but from what I have seen in your past experiments you are probably the best man to do it.  If I ever find a fast reliable (and affordable) laser scanning service, or find an affordable laser scanner for my own shop, I'll probably pitch in.  I do not trust myself to provide adequate measurements for the enitre hook.  I only try to find center lines for the very short parts of a hook that exits the cavity.  

 

I started this task as well awhile back - and Bob's comments about hooks being different shoudn't be overlooked/underestimated.  I scanned a hook and traced as close as I could the form.  I then mocked them up in 3D.  After that I then used my little CNC to cut the profiles into a block to test fit.  I found maybe half worked - the straighter the hook the better the fit (Think simple round bend hooks).  Things with alot of bend (think EWG stuff) had way more variability and were a real PITA.  I now just concern myself with dialing in the hook eye and shaft near the lead - after that it's just general reference.

 

In doing this I match the critical points (entry/exit of mold cavity) and then leave a wide area for the hook to sit... has made life ALOT easier!!!

 

 J.

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