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carl365
07-23-2013, 05:19 PM
I have quite a few arrows that have the Marco BJ style nocks that fits the aluminum cone ends. The nocks are all a bit too tight on the string. I've heard remedies of dipping in boiling water to soften then fit on the offending string and let cool to size, drilling carefully and / or filing. Are these procedures OK?

Seems they make only the one size nock.

I'm already using a 12 strand string but the nocks are still a bit too tight.

Carl

Ehunter
07-23-2013, 05:54 PM
I'm no target archer by far, but one thing I have done without a noticeable effect on accuracy is to wrap a piece of 220 grip sandpaper around my string, then nock the arrow several times. That seems to sand down the nock equally until I get the fit I want. As long as the paper stays tight around the string, in theory it should sand both sides of the nock equally. All I can say is that it's worked well for me so far.

TEN RING
07-23-2013, 05:57 PM
You might want to reserve your string with a smaller diameter severing

Sonny Thomas
07-23-2013, 08:13 PM
One, make sure all your nocks are the same. Two, serve center serving with correct serving.

The nock is to snap on, but the nock is not tight once snapped on. It will move up and down.

Spreading the tangs, the boiling water thing, to me, wouldn't give consistency and neither would sanding.

I haven't found it to be true, but then I no super shot. Said is one should change arrow nocks every 100 to 200 shots. I don't know, I've some arrows with nocks old enough to vote and have been shot bunches of times..... What it is, is having the same amount of snap off each and every shot.

bfisher
07-23-2013, 08:54 PM
Those Marco BJ nocks were the same back in the 70's. Back then most strings had center serving made of monofilament. What I did back then was remove the center serving and reserve with 10# or 12# mono fishing line.

You can use the hot water trick or sand paper all you want, but if you plan on using the same nocks all the time there is no substitute to using the right size serving thread.

carl365
07-23-2013, 09:01 PM
Thanks for the replies guys, I tried the hot water and it works but as Sonny says, it's pretty near impossible to get them all the same tension. Well the hot water and sanding will do for my practice sessions especially because their really old nocks but I know, I was afraid the answer is to re-serve the string. The problem with re-serving is getting my lazy ole behind moving...haha!

I should consider myself lucky though since I have all that stuff, spools of various gauges of serving both mono and HALO type materials in colors even. Just to make sure of the gauge, I'll wrap a sample 1/2" section down the string a ways and try the nocks for fit.

OK, one question, what is the best way to remove the existing serving? it's mighty close to the string.

Thanks!
Carl

Sonny Thomas
07-24-2013, 06:22 AM
OK, one question, what is the best way to remove the existing serving? it's mighty close to the string.

Thanks!
Carl

Real carefully ;) No, really quite simple. I use a box cutter, the snap-off, new blade kind. Just like a dull knife is the one that will hurt you, a dull knife and trying to cut the serving can result in a cut bow string.

The center serving is usually bulged just a bid where the tag end is under the serving. I find it and carefully whittle away until the serving comes loose. Once loose and started, I roll the serving on the bow string to loosen, grab near where the serving still kind of tight and pull steadily. The loose serving unwrap/slip right off. I cut that and loosen and roll and cut until all removed. Unwrapping one wrap at a time is a real pain.

bfisher
07-24-2013, 07:04 AM
Real carefully ;) No, really quite simple. I use a box cutter, the snap-off, new blade kind. Just like a dull knife is the one that will hurt you, a dull knife and trying to cut the serving can result in a cut bow string.

The center serving is usually bulged just a bid where the tag end is under the serving. I find it and carefully whittle away until the serving comes loose. Once loose and started, I roll the serving on the bow string to loosen, grab near where the serving still kind of tight and pull steadily. The loose serving unwrap/slip right off. I cut that and loosen and roll and cut until all removed. Unwrapping one wrap at a time is a real pain.

Pretty much what I do, Sonny. Once it's cut near the tag end just roll it till a couple inches is loose and then cut it. Then pull the tag end while I keep rolling the loose stuff. Take it off in sections. Now, as we may have experienced you don't have to do this with monofilament. Cut the tag end loose and it unravels real quick all on it's own. Found this out back in the days when I hit my arm guard and eventually it broke and unraveled.

Carl, there is a way to fix your problem that I would really recommend. Toss those old Marco nocks in the trash. Cut the taper off the back end of those arrows and install Easton Uni bushings. Then use Uni nocks or similar Bohning Signature nocks. You have to update your thinking. Honestly, nobody uses Marco nocks any more....LOL. Now when you do this you just have to figure out what size serving to use and how tight to make it to have a finished serving diameter of about .115". I like .110" but then I'm really anal about having a loose fit with my G-nocks.

carl365
07-24-2013, 08:07 AM
Again thanks Sonny and bfisher: I'll order some Uni bushes and G Nocks today. Have to find my arrow cutting tool.
Good point on the center serving bulge, that'll make the surgery a bit easier.

Update: Uni Bushings on the way. I ordered these arrows a half inch longer because I wanted to make it exact length for the clicker, so I'll get both things done at the same time.

Carl

bob cooly
07-24-2013, 06:08 PM
I have a very small Swiss Army Knife with a pair of tweezers and a toothpick in the handle. Nothing else works as good for me to remove seizing, the blade is kept razor sharp on a small DZ stone. Once you get it started the tweezers and pick finish the job great without harming your bowstring.