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View Full Version : How many lbs per full turn on a screw



Stéphane
08-18-2011, 02:29 PM
Man this title sucks.

I'll try to explain it better. I have 2010 Bengal with 70lbs limbs. When I left the pro shop today, it was set at 60lbs. Now I did one full turn (increasing) on each bolt. What could it be at? Any rule of thumbs applying here?

I calculated the arrow speed using online calculator and I would go from 260 to 270 (appr). Every bit counts, right? Hunting season is so close and I'm too excited to sleep!!!

Destroyer
08-18-2011, 02:34 PM
Rule of thumb? Approx 3 -4 lbs per turn. How many turns until it bottoms?

Stéphane
08-18-2011, 03:12 PM
I don't know. Maybe 3 more?

Hutch~n~Son Archery
08-18-2011, 03:35 PM
It is 3lbs to a full turn. 5 turns equaling 15lbs. At bottom if you have a 70lb bow it should read some where from 70 to 72 lbs if 60lbs the same thing 60 to 62 lbs


Hutch:cool:

Hutch~n~Son Archery
08-18-2011, 03:39 PM
Turn both limb bolts in all the way. Put a mark on both limb bolts. Back them out equally 3 turns each. That will take it down 9 pounds if you want more then 1/2 turn each.


Hutch:cool:

Destroyer
08-18-2011, 05:55 PM
Every bit counts, right?

Not really. Speed isn't everything especially for hunting. Your much better off shooting at a comfortable draw weight, with hunting usually you don't shoot warmed up so going too heavy will drop your accuracy. Bows today have enough speed even at 50# to kill most things.

MartinMan
08-18-2011, 07:48 PM
Now does this rule of thumb only stand for Martin bows, or is that any bow in general?

Brian

Hutch~n~Son Archery
08-19-2011, 12:57 AM
Martins for sure. But I though their are a few other companies that do. Maybe some one else can give more insight. Since all I have ever owned is martin.



Hutch:cool:

Destroyer
08-19-2011, 01:48 AM
Most bows in general but some gain a little more depending on the design and setup.

MartinMan
08-19-2011, 06:21 AM
I will have to test it out and see what I come up with. Give a few turns to the bolts and measure the dw with my scale. Cool, thanks for the info!

Brian

Stéphane
08-19-2011, 06:44 AM
I went to the shop last night and it said 62lbs. So can we say between 2 and 3 lbs per full turn?

Destroyer
08-19-2011, 04:22 PM
If it was actually 60# and its only gone up 2# then I guess so but it depends on the actual weight it was. Did you weight it before you went 1 turn?

Again, how many turns until bottom will determine it. For example, if its 3 turns off bottom now and your getting 2# per turn then of course it will only hit 68# unless it increases more on the last turn.

Not sure what you are looking for, what draw weight do you actually want?

Stéphane
08-19-2011, 08:02 PM
If it was actually 60# and its only gone up 2# then I guess so but it depends on the actual weight it was. Did you weight it before you went 1 turn?

Again, how many turns until bottom will determine it. For example, if its 3 turns off bottom now and your getting 2# per turn then of course it will only hit 68# unless it increases more on the last turn.

Not sure what you are looking for, what draw weight do you actually want?

I wasn't looking for any particular number. I just wanted to see if a full turn would make a big difference in pulling the string. So I wanted to know how much I increased it by.

I might ( and I stress might) bring to 70 at some point. I bought my arrows with that in mind.

I am just very curious about these things.

Destroyer
08-19-2011, 09:03 PM
I just wanted to see if a full turn would make a big difference in pulling the string.

Ok then. A few pounds wont feel much difference unless you have reached your personal limit. My shoulder lets me know if its too heavy these days, that is usually over 73#. Did it seem like much to you?


So I wanted to know how much I increased it by.

Get a bow scale, its the only sure way of telling. ;)

Hutch~n~Son Archery
08-20-2011, 12:51 AM
An inexpensive scale is a luggage scale out of Wal-mart. From all the reports of those who have used them the are good.



Hutch:cool:

Destroyer
08-20-2011, 04:08 PM
I bought a cheap digital of ebay, $15 tmd and it works fine. Have a better scale and there isn't much difference.

cyclepath
08-21-2011, 10:33 AM
I bought one of these on e-bay for fishing but found out was extremely accurate at weighing draw weight, within a couple ounces. If you're not in a big hurry pick one up, well worth it.
http://www.ebay.com/itm/40kg-88Lb-1410oz-Digital-Handy-Scales-Luggage-Fishing-/160609645000?pt=LH_DefaultDomain_0&hash=item256514b1c8