Ferrule material density meassurements .

SRVIKINGHIT said:
HYDEX 202 Density = 1,15

TOMAHAWK Density = 1,35

JUMA Density = 1,60

ELFORYN Density = 1,35

ELFORYN SUPER TUSK Density = 1,20
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Ok. Just what do these #'s mean? There are charts(https://www.dzcues.com/ferrules_4.html) that give the weight which is important in terms of deflection. Are density/weight evenly proportional? Your thread is pretty vague.
 
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Density is compared to water = 1.00 kg/L or 1.00 g/mL (probably at 4ºC since water density varies with temperature)

Or you can convert to English units with "a pint is a pound the world around"
 
garczar said:
Ok. Just what do these #'s mean? There are charts(https://www.dzcues.com/ferrules_4.html) that give the weight which is important in terms of deflection. Are density/weight evenly proportional? Your thread is pretty vague.
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Hard Rock Maple = approx 0,7.
You have to scale Bob's values down.
Believe he set maple to 1,0 to make it more friendly to calculate/see the difference.
This is important numbers for the construction of ld shafts.

1g weight reduction in the first inch = 7,7% (7,7×1) lower cueball deflection, second inch 6%, third inch 4,7%, fourth inch 3,9%...
7,7% + 6% + 4,7% + 3,9% = 22,3% in total.

This is the math based on hard core facts and science and real life testing.
 
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Density is mass/volume. For example: g/mm^3, kg/m^3, lbs/in^3, etc.

Relative density (aka specific gravity) is what DZ Cues and SRVIKINGHIT are communicating. That takes the density of the test material and compares it to the density of a common reference material. Water is often used for liquids, but anything could be used as the reference material, including a bar of gold. That reference material is set to 1. Anything higher than 1 will be heavier for the same volume, anything lower will be lighter.

Without specifying what is used as the reference, the data is incomplete. DZ Cues specified he used the density of his maple sample as the reference. SRVIKINGHIT did not specify, but he probably used water is my guess.
 
iusedtoberich said:
Density is mass/volume. For example: g/mm^3, kg/m^3, lbs/in^3, etc.

Relative density (aka specific gravity) is what DZ Cues and SRVIKINGHIT are communicating. That takes the density of the test material and compares it to the density of a common reference material. Water is often used for liquids, but anything could be used as the reference material, including a bar of gold. That reference material is set to 1. Anything higher than 1 will be heavier for the same volume, anything lower will be lighter.

Without specifying what is used as the reference, the data is incomplete. DZ Cues specified he used the density of his maple sample as the reference. SRVIKINGHIT did not specify, but he probably used water is my guess.
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Bottom line for players is that a lighter ferrule results in less CB squirt, right?? Can someone do a test and come up with a 'ferrule porosity' #? Be nice to know exactly how bad chalk is gonna fk up your nice ferrule. ;)
 
iusedtoberich said:
Density is mass/volume. For example: g/mm^3, kg/m^3, lbs/in^3, etc.

Relative density (aka specific gravity) is what DZ Cues and SRVIKINGHIT are communicating. That takes the density of the test material and compares it to the density of a common reference material. Water is often used for liquids, but anything could be used as the reference material, including a bar of gold. That reference material is set to 1. Anything higher than 1 will be heavier for the same volume, anything lower will be lighter.

Without specifying what is used as the reference, the data is incomplete. DZ Cues specified he used the density of his maple sample as the reference. SRVIKINGHIT did not specify, but he probably used water is my guess.
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As a reference HYDEX 202 has a specification at 1,15-1,2. Spot on with my meassurements done with the material on hand. Water are 1,0.
 
garczar said:
Bottom line for players is that a lighter ferrule results in less CB squirt, right?? Can someone do a test and come up with a 'ferrule porosity' #? Be nice to know exactly how bad chalk is gonna fk up your nice ferrule. ;)
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Correct:) Where density comes into play is its an apples to apple comparison. So if someone screws on a solid ivory ferrule, and someone else screws on a hollow ivory ferrule, the overall weight would be different, but the densities would be the same. Its a normalizing factor to compare material choices, rather than the geometric design/construction method choices.
 
SRVIKINGHIT said:
Hard Rock Maple = approx 0,7.
You have to scale Bob's values down.
Believe he set maple to 1,0 to make it more friendly to calculate/see the difference.
This is important numbers for the construction of ld shafts.

1g weight reduction in the first inch = 7,7% (7,7×1) lower cueball deflection, second inch 6%, third inch 4,7%, fourth inch 3,9%...
7,7% + 6% + 4,7% + 3,9% = 22,3% in total.

This is the math based on hard core facts and science and real life testing.
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why is that important
 
Texas Carom Club said:
why is that important
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it is important in terms of deflection. heavier/denser ferrule will result in more cb squirt. if i go use my iv ferruled jensen after using my mezz i can't make a ball using spin. the squirt is huge. i've gotten use to my med-lo deflect. Mezz so hi-defl cues take to much time to re-adjust to.
 
garczar said:
valid point but its almost impossible not to get some chalk on it. glad your so tidy. props. ;)
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My play cue, which is 10+ years old has but 1 small chalk scratch on it.

There is also a cloth backed sand paper (grit about 1500) that you can use to polish off scratches. (ETA: Crocus cloth)
 
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