Primitive Archer
Main Discussion Area => Bows => Topic started by: arachnid on December 16, 2015, 06:03:10 am
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Hi guys.
A quick question: is it safe enough to use an 8mm dowel as an alignment pin (instead of a metal pin)?
If not, what can I use as a metal pin (8mm diameter)
Thanks
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No. More like 5 mm x 12mm.
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Not sure how mail order works in Israel. If you can order from Bingham's, you can get the whole 3 piece assembly for $18 USD. That includes bezels, washers, threaded inserts, bolts and alignment pins.
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Thanks pearlie but I got everything else I need. Just the pin.... And shipping will cost quite a lot.
Any creative ideas?
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If you have any type of manufacturing in your country you should be able to find an outlet for machine dowels. They are exactly what is being sold as limb pins.
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There has got to be somewhere you can get 1/4" steel rod over there, thats all alignment pins are.
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Thanks. I'll try to figure something out.
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You have a lumber yard. Usualy they have misc. pins and such.
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You could use the shank of a bolt if you had to. Just saw the head and threads off.
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But just for mevto know... Why not use a dowel? All it's doing is holding the lime so it won't move sideways , and there is no pressure sidways...
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There are shear forces at work. Most of the glass guys use TWO hardened steel pins per limb because that is were failure occurs.
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Some wood species are extremely hard and strong, like African Blackwood, and should be available overseas. I use 3/16" brass and have not had any trouble so I would think that one of these dense species would be good enough if made properly
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You could use the shank of a bolt if you had to. Just saw the head and threads off.
I did just that and it seem to work.
Do I need to reinforce the alignment hole in the limb somehow or do I just leave a hole in the wood?
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Just a hole in the limb is adequate.
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Generally you are better off with an insert for the pin to go into as well but solid wood is pretty adequate.
Typical shelf units of particle board and the like often have pins that help align them. You could probably salvage some of them.
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Never seen limb inserts in any I've owned? Black Widow, Bighorn and Robertson. Maybe they are "hidden".
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I meant more for alignment pins in general use. A pin and bushing is the standard. The dense materials typically used for this area on bows likely makes the bushing insert unnecessary.
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I know what you meant, just never seen one in bows I've owned. I think going through glass and wood takes care of that. I'm using osage self limbs on my project, so know inserts in my limbs either.
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Well I got the limbs attached. Alignment is far from perfect but thankfully the limbs are still full width without any tapr, so hopefully I can fix it with the right width taper.
Any tips would be welcome
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Run a string from tip to tip until it runs directly over your hex bolts in-line, that's your bows true centerline.
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Exactly what I did PD. I have enough width to taper the limbs to alignment.. Hope I don't mess this up... :laugh:
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Sounds like you are well on your way my one and only Israeli friend :)
That's just one of the cool aspects regarding PA. You get the opportunity to talk to people from all over the world. Like you and Simon my Deutschland comrade. I know we have some Finnish folks on here to. Plus all those English blokes. It's a great opportunity indeed!
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Sounds like you are well on your way my one and only Israeli friend :)
That's just one of the cool aspects regarding PA. You get the opportunity to talk to people from all over the world. Like you and Simon my Deutschland comrade. I know we have some Finnish folks on here to. Plus all those English blokes. It's a great opportunity indeed!
Right you are sir.... the internet has mad to world much smaller! :laugh:
Thanks for the help and tips. Hope I`ll have a bow to show in the coming days...
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When i built mine i put tee nuts inside the riser and used two bolts per limb
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(http://i623.photobucket.com/albums/tt320/bubncheryl/100_2795.jpg) (http://s623.photobucket.com/user/bubncheryl/media/100_2795.jpg.html)
(http://i623.photobucket.com/albums/tt320/bubncheryl/100_2796.jpg) (http://s623.photobucket.com/user/bubncheryl/media/100_2796.jpg.html)
(http://i623.photobucket.com/albums/tt320/bubncheryl/100_2799.jpg) (http://s623.photobucket.com/user/bubncheryl/media/100_2799.jpg.html)
Put the tee nuts in between the hickory and walnut
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I remember that bow Bubby... Stunning craftsmanship.
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I used 1 bolt and a 1/4" steel pin. Bought some 1/4" round stock at the local hardware store. Make yourself a drilling jig.
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So... I got the limbs pretty much inline and got the bow tillered. Ended up 38#@26" which is ok... it`s going to be a fun stomping bow for my backpack.
BUT.... I took set during tillering and lost some reflex. I shot it today and it`s a fun little shooter, but I think it`s too slow. I doesn`t have a lot of early DW. So I realy want to re-add some reflex to the limbs. I thought of laminating a thin piece of ipe on the belly (and reflex it on a form) and re-tiller (although it`ll add more weight to the tips. I also have a thin piece of oak, maybe it'll be better?). Will it work?
If there`s another way to do it (beside sinew...) I`ll be happy to know.
Thanks
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Self limbs or laminated limbs?
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Self limbs or laminated limbs?
Laminated (ipe\boo). I'm thinking of adding the thin lamination only on the tip section.
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Why only the tips
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You'll just be chasing your tail adding anything to the bow now. Adding a bit to the outer limbs and reflexing them will make the inner part work even harder.
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You'll just be chasing your tail adding anything to the bow now. Adding a bit to the outer limbs and reflexing them will make the inner part work even harder.
OK.... Thats why I asked the pros, so I won't do any mistakes.
How about delaminating the outer section with heat (I used wood glue) and re-glue it with a bit more reflex?
If that won't work, is there a way to do it besides making new limbs?
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Can you post pics braced and unbraced so we know what's going on
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So.... thats what I did.
I applyed some oil on the belly and heated it over my stove. then I clamped it on the form again.
After a few hours I took it out of the form and it kept that nice added reflex. Upper limb is still bending a
bit more then the lower but that my positive tiller since the arrow shelf is about 3/4" above center.
Bow feels like it gained a bit of early DW, although I need to shoot it to be sure it really helped.
This is not the first time I`m successfully heat bent ipe, so it can be done despite what everyone say.
It`s not perfect but I`m going to call this one done. I`ll take what I`ve learned from this build and apply it to my next takedown. This build tured out to be fun, I`m sure I`ll want to try again... maybe I`ll make my kids new takedown bows....
Anyway, thank for the help guy. You`r all great!
Here are some pics...(FD pic will hopefully come tomorow)
unbraced (before heat bending):
(https://lh3.googleusercontent.com/Jm0ZL4vq6dr4F-CyqpgBp_JsREkrNC_TnBadsON3Xd16Nmvwj9Gw_MC5JB-jshYLUPWitzPpT95Ber7KsF3G9X4APyQsLmahFNtcrn-t2Ry7bxT0YbWPBJ6GWGDvTuIxV1ZyE_larJGb2DOHVg3cn5ydlQ36ewQGxZt_RaVGmx73Iwnsyh3QTCvJJm7Dp7kJkYyUScWJClXT3LmvmeksrDLf-DjHIK5q9N_rk6OAAEYncpH7y0k1RiUjt0I1p84xx3dTaBU0oJHiPjRM0H25uJh25yWmU00H97m4w57xvdCzez_UlyfzBpbU9VWd4TgUqJrS4VcZ5a6Y5K4FjDfS8M-meDo-EPvLooWC9IFTMDNWJt5lDKefRUTcx1MSZHmWgO7KuOMFO5pNS2oX_590bl9h9i8Cw8ADiqTF-T4cRt3TTia9ungG7UPdnCC2vFOqYjSPPiN-kn0Bm2AZ5VQFhluNGbgFSUW2taAg6AcO4e4_dcjOvxR47yrd5bDogz9tRVyJ6P2VEMVGVhoChUpe-A24yO1cA9UtzzkvjEwDWKfHqh4bVeQHk7nLRVOeAVfZw3GI=w1144-h643-no)
Braced (before heat bending):
(https://lh3.googleusercontent.com/QyShdaWh7WO6q6xQQuh1VwgV7HRnT8IzaIhiziyOljbbP50M9UoxBKAWeDfeSY66-TNZulJVM-GqJXngNqdWDoW2JjT2KPeqNltytAYxYw7Xh9MuDz9vSpr4iXP7vsyspSwBUfHI_VsnpnxtLsLh_fLGkPO475foGCycwHGEBnnwzudMzNs7qd8OAuOHJiIzGRcMcD5V8pbjW7EpTO0nPo3pgrd-DaOi1dlqGEgX5YdsjalcpBXN-gFrcFgiktVy2QgDYkpWLfW1hK-ZvPEKRuTknM2YrgMQCucemO_O3CzaLjJaK98wpMW6Gxr7PGsGl_AG7Ay0u--3atmTkq_K_-ulwhGLj2fwx47u7Qicq2T_a8Y1anzCdksD8zCLMafx8Zh-NsSNZN265VNbv5599EPZXlRQfx09OyxDEmcOwIE3pUAJQpO886ZpqMc3W5HgfaSfzl4yIFHhS8Y-uGE8KSGMBvTP4Lppv6uRJkCxktIjgaHu4sX2By6k6Y3hrD-yNXGOPOdUXXhurTdbje9XBjoLffvSNDoPVk0DHioYhbXQmfhqxGtxoo8JkPQvWKTZZY-u=w362-h643-no)
Unbraced (after heat bending):
(https://lh3.googleusercontent.com/2SdvyeXBSjwZTNmzi70dr0n8wWxP06J61Czyco0PPtY5ZB-2fzoYwvsVazEN6ixWpTmc3sjLr2DMXTW7Tx3uBpGfz7BdcPIaX5ED9Yq5fqRLCR5rU5Hjjx4zoTjw-Bn2z-OBptw6YUuZ5aSFsEOH83I4iSdjEWxcOfwqBb2QeIIC_Ar15jqYJngArNcScabKWMmgN0mtH3PUXgdYT95GAOZAq65K5F0VNPLM7YOuzvsqEamQpKUj1CCuG-GbUVRQUxxiK8zMjdEBgyZDFKb6P_f-0eIy-VwNmcWj2T1nh-EkLAb8wxVjgVSS8-hi2f3LWe_6YUwuhBj2A4qtZZ1v64dEnSjmtKhT3yqBaxZ_yoOu8MS7dr8hry177FezH91FhEYOoZWLq5rhtNYzN7Gw7gcmqXIlczlw4depVe4ObYs-02YlIhiHrAR5UUr0KWQLn2Ndx8qerEGsPYjgdSR1P3YIfUwAXo-14Sf2k6yQuFlU3CWIEqgws4BAThCFxSlNy1TFssf-svymCzrmkZpbOCO0BAEeV6T-O_Y1_teP7WMF2KBSKi0d3_BO4njUmnR9MSl1=w1144-h643-no)
Braced (after heat bending):
(https://lh3.googleusercontent.com/Xgph29UJfTxRd0dwSYcfVUhPhXXvwHaN2Lpg_AgfxFGQ2ut-2qKQCaZDQ8Tmt50N4l_Z9AwIIkTs9dPQFzm6d8m4nTQfC8mEjjeA_MX3p1_fBkCv9VaQbE0hmypC6YZx-9RqokclsFyi7Y_K3vr_JnSZ68EY8WvQ9xldZ0seBZ4ohqR_RzpvGia6q9hFFWh05Dv0jacFW3pGzK_dxFtWebx58S_9hjthV0ggkTBSiqQ7Isa0VsLkT9kho9W4a_wn67qcJbI2GtGJz8qSEA38UhiNr-SoXBpqViSq0xUCDQ-zlEDUzSOH-12FgMCCAd1hfyD7kF2xnDkBMm36PyYe06aVJ_4Z9NUw4gjza7wSeJLf8trDplgwMvTVK_Nog26rk8-buyZ1JN-TG63y86twk8dThcRcbGZLjoaHRdP9jZ1tDWlP91aDcJyVaj8Gsk74W3w5IoR4yEpOXvxtMoOco-hc_LGB1JPKOIfhwXWw8ql4n4dDhezuLFA4gLSW8mEyx8FUsGPi9K5UT3z558TGXNH_CjeOTuqyRNh4FayKdTpGpl2dQgeylQuuPGd4wTDg_McA=w362-h643-no)
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Full draw:
(https://lh3.googleusercontent.com/1ctbF7Pe3hIO2Gg09Wj4YcVtZ2jjt_ZampWa6hN711zOzcvm9fd-8PaWjIp2roSWW-A1adijlNkFMKI04LqLl9vvTGJLoFmFVWPX5Ao-WFo84I-bF_2bMggzYin2v37C475Kg6Exred9mdLz4OFDpznUwxg_hbBvmzZ_Kcziam2e1HaRNEevST4Qc_PQatRf5EXo9XD7Tq1R0fDmiNGIer3051PeXrElpL_QbD1KBWWTGgz7TYOEDqFt_sv__hb49Qu-MeeqM2b1Fq4cwZMHzDM1JhasbsBaePgf312d-9_-0HF4BcqI34ayv07nztsEIwvsW5jDQnxCu2Q52a1QRcpoVPREeYck9CO7nzjVZUwWxmaYvGP3jb5U6tMFcutbENBXvCa4_Zmzozf57J3j-2kVhbbYmjTz362egbAG_cwTKfmzmxGITBdVR_-voh6zIiO3w5-kgrIq1pflk2H6IXX87bGmM12t2naY_-G8F967KcXbeUlOoJja35dJKSVpYeX781AHxUaF4fZ4Hbhnd9dL5J7LzzUhoJo4nv_qaf0I4czggSRdbmAgo-_sSdJQx65g=w1144-h643-no)
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I can't see your photographs. Check your share permissions.
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Hope it shows now
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Nice work, Arachnid and nice bend on your new takedown bow. Well done! 8)
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You did good, I like that. Where do you live in Israel?
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You did good, I like that. Where do you live in Israel?
Thanks PatB.
Thanks Mullet. Do you know Israel? I live in a town called Rehovot.