Arrow spinner and ASD

[bowhunterportugal]

Hi gang,

I've mounted a home made spinner that works fairly well and bought a G5 ASD (arrow squaring device).

It made a big difference in getting the insert and nock aligned with the shaft. It also allowed me to see that a brand new, spined tested before package, machined precision made broadhead aren't that strait as they claim...            

Are these tools commonly used by you guy's? Is this information important or you just shoot and see how they fly?

Obrigado (thanks in Portuguese)      

[amicus]

I have the ASD but to be honest I have never used it. I do use the Dixon arrow spinner it is a great help in making sure your arrows/broadheads are spinning true.

Gilbert

[bulldog18]

I use my ASD and spin test every arrow I build.

[bigbadjon]

Arrow spinning is essential. I don't use a squaring device but I do always spin check.

[wingnut]

Yep I spin test every arrow and broadhead combo.

If you have high end broadheads that do not spin straight you need to return them and buy a different brand.  IMHO

Mike

[bowhunterportugal]

Originally posted by wingnut:
Yep I spin test every arrow and broadhead combo.

If you have high end broadheads that do not spin straight you need to return them and buy a different brand.  IMHO

Mike

Sorry Mike, what does it mean high end broadheads?

[NoCams]

Portugal,
I would bet my hat that your broadheads are fine. What folks need to realize is manufacturing fits and tolerances come in to play when you are talking about runout of assemblies that spin. It all adds up at each joint you make in a spinning assembly, ( arrow, insert, broadhead ).

In order to make sure all inserts will fit all arrows and not have an interference fit or worse, an insert too big to fit in an arrow the manufacturers establish tolerances min and max diameters. So...... let's say you get an arrow with an inside diameter of max and an insert of min.... guess what you have runout due to the sloppy, loose fit of the insert inside the arrow shaft. The insert will settle to one side of the inside of the arrow shaft. Now lets assume again...... you get that same insert with a max size tapped hole where the broadhead screws in and your broadheads threads and outside diameters are min..... ? And what if..... as you screw the broadhead in tight and it is pulled to the same side of the arrow shaft where the outside diameter of the insert was to one side of the arrow shaft ?

You guessed it...... you got an assembly that spins like CRAP ! All the tolerances have MULTIPLIED on you to make for a very poor runout of the entire assy. This is why you must spin fit the ENTIRE assy AFTER it is put together and THEN adjust with heat and glue till your assy is running true. Afterwards you cannot screw the broadhead out and put it back in and it line up perfectly again. Some manf used "O" rings on the diameter that fits in the insert to help with this. As you tighten the screw in broadhead the "O" ring will help center it in the insert.

Not your broadheads. If you spin those chucked in a lathe I would bet my next payday they are round within .0005" or less. The entire outside diameters of the broadheads ferrule is turned on a lathe in one operation so trust me, they are perfectly round !

In a perfect world the arrows, inserts, and broadheads diameters would all be within .0001" of each other. However, if they were we would not be willing to pay the cost for them to be that close in tolerance ! Tolerance costs $$$$ in the machining world. Hope this helps and JMHO from years of machining experience.    

[bowhunterportugal]

NoCams,

I'm sure you're right! I'm a green horn at this and I thought that the glue would fill that insert/shaft space in order to align both.

All you said makes perfect sense. Thanks.

But I ask then. Why does, in the very same arrow, one broadhead spins true and the other doesn't? If you explained that already I apologize. To be honest, I didn't understood some words you used...but I got most of it. Don't get me wrong. I'm just trying to learn.

[wingnut]

High end - expensive!

Mike

[Gen273]

I use both a spinner and an ASD, I think it helps with broadhead flight.

[sneakybow]

I have the Firenock spinner/squaring set up and it is a really cool piece of gear. You can square up the insert end, or the nock end even with the feathers on, then you can take the sanding block off and use it as an arrow spinner. Pricey, but does a lot of stuff