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PostPosted: 02 Nov 2008, 19:03 
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Dark Knight
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As some you know, I have a durometer to measure the hardness of rubbers and use it whenever I glue a rubber to a bat (if I remember). I keep the value in a table here:

Sponge hardness measurement table

Unfortunately most rubbers come sealed, so I can't just open packets of rubber in our store just to measure the hardness (would not be able to sell it after that)... I can only do it when I have to glue the rubber to a blade for someone.

I don't know how useful people find this table, but I personally think is very valuable, or I would not bother... Do you find it useful?

I would be great if some of you, who do try quite a range of rubber, could keep the cut-offs... and when you've a bunch of these, from rubbers that are not already in the table, send them down to me to measure... Obviously with just 1 or 2 pieces, it's hardly worth it, but if you've got a bunch of them, the postage (within AU) would only be about a dollar or so (in an envelope sent as a letter), and I'd be happy to pay for that as well. For people outside AU, I think the postage cost would be too high to make it worthwhile...

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PostPosted: 02 Nov 2008, 19:07 
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Thanks Haggisv this is great :thumleft:

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PostPosted: 02 Nov 2008, 19:17 
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...Will do HaggisV

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PostPosted: 02 Nov 2008, 19:34 
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Dark Knight
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Thanks guys!

That reminds me MM, I should measure the Mirage sponge... more for fun than anything, as the hardness is not exactly meaningful :lol:

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PostPosted: 02 Nov 2008, 19:38 
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That sponge is completely out of this world for HaggisV,


hehe, well it's very hard, but it kills of all the spin and the speed :?:

Anyway it will interesting to find out just how hard that sponge is.


metal monkey

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PostPosted: 02 Nov 2008, 20:55 
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Dark Knight
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Yes you're right... the sponge fascinates me :oops: :lol:

I measured it... measures 41deg... softer than I expected....

Funny thing is the durometer leaves indentations on the sponge... and the reading changes after a a small period as the sponge dents... very weird stuff 8)

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PostPosted: 03 Nov 2008, 13:18 
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how about... for the people you know already who are purchasing rubbers from you, you could ask them whether you could open the packaging to measure the rubbers (hardness, weight, etc...)...

no harm in asking... if i were buying rubbers from you i wouldn't mind you opening the packaging and measure the rubbers first....

just a thought...

p.s. one time i help a guy in procuring provincial h3 in 41 degrees. i asked him whether i could try it before sending it to him because i want to try the 41 degree hardness. well, he let me... no harm in asking...

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PostPosted: 03 Nov 2008, 14:37 
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rokphish2 wrote:
how about... for the people you know already who are purchasing rubbers from you, you could ask them whether you could open the packaging to measure the rubbers (hardness, weight, etc...)...

no harm in asking... if i were buying rubbers from you i wouldn't mind you opening the packaging and measure the rubbers first....

just a thought...

p.s. one time i help a guy in procuring provincial h3 in 41 degrees. i asked him whether i could try it before sending it to him because i want to try the 41 degree hardness. well, he let me... no harm in asking...


Yes I guess that's ok for people that I know already... good idea, I'll ask next time :wink:

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Last edited by haggisv on 05 Nov 2008, 10:35, edited 1 time in total.

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PostPosted: 04 Nov 2008, 15:07 
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How is sponge hardness measured?

I've kept all the excess rubbers (all neatly labelled as well) which should come handy for your endeavour haggis.


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PostPosted: 05 Nov 2008, 07:37 
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haggisv wrote:
rokphish2 wrote:
how about... for the people you know already who are purchasing rubbers from you, you could ask them whether you could open the packaging to measure the rubbers (hardness, weight, etc...)...

no harm in asking... if i were buying rubbers from you i wouldn't mind you opening the packaging and measure the rubbers first....

just a thought...

p.s. one time i help a guy in procuring provincial h3 in 41 degrees. i asked him whether i could try it before sending it to him because i want to try the 41 degree hardness. well, he let me... no harm in asking...


Yes I guess that's ok for people that I know already... good idea :wink:


Yes, good idea. Personally, I won't mind you opening up my package to measure the sponge before posting to me. I will try to remember to put that offer for you to measure my sponge in that message area with my future orders.

@BB: not only are you an EJ, you are also a JC (junk collector) :lol:

Cheers.

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PostPosted: 05 Nov 2008, 10:37 
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Dark Knight
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Beer Belly wrote:
How is sponge hardness measured?

I've kept all the excess rubbers (all neatly labelled as well) which should come handy for your endeavour haggis.


I've got a durometer which I bought specifically for this purpose. It's basically a metal ball which pushes into the sponge, and the resistance is a measure of the sponge hardness.

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PostPosted: 05 Nov 2008, 18:51 
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Wish you thought of this a while ago Haggisv. I would have done like BB and labelled what cuts were what. IIRC you don't mind measuring the same rubber type time after time to see variation, correct?

What size does a cut need to be to measureable?

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PostPosted: 05 Nov 2008, 21:30 
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Dark Knight
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I can get a fairly accurate reading if the piece is at least 15mm in both directions.. most cutoff are that size... Yes I do somtimes measure multiple samples, but I'm more keen to get ones I don't have already...

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PostPosted: 05 Nov 2008, 22:46 
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Cool I shall dust off my collection and send them to you next week Haggis!


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PostPosted: 06 Nov 2008, 00:30 
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Dark Knight
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Great stuff! I'll send it back when I've done the measurements... thanks very much!

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