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Reporting the mass of your uncut rubbers |
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stiltt
Assistant Admin Joined: 07/15/2007 Location: Location Status: Offline Points: 1018 |
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Posted: 06/04/2010 at 3:45pm |
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new site is: http://www.choices-guide.com/silver/
Additional site with updated values: Rubber Mass Database Some like head heavy, some not. This simple database is so helpful to fine tune the balance of our blade(s). When you purchase a rubber, please measure the sides (Lenght and Width) in mm (1 inch = 25.4mm) and weight it in grams before cutting it. Also report in this thread the color of the topsheet and of course the sponge thickness. Finally divide the weight in grams by the product (L x W) to get the weight per cm2. Examples: uncut Joola Mambo H 1.8 mm red 168mm x 178 mm = 53 grams = 0.177gr/cm2 uncut Nittaku Narucross GS Soft MAX Black 168mm x 168mm = 63 grams = 0.223 gr/cm2 Forum member Silvalis will check regularly this thread to harvest your data. Thanks to him and Haggisv to make it possible. Edit 1: here is the ITTF official rubber list http://www.ittf.com/_front_page/ittf1.asp?category=rubber
Edit 2: After Silvalis' formatting instructions I would submit the 2 rubbers above the following way:
Brand: Joola
Rubber ID/Model: Mambo H Thickness: 1.8mm Colour: red Uncut Mass: 53gr Length: 168mm Width: 178mm Brand: Nittaku Rubber ID/Model: Narucross GS Soft Thickness: MAX
Colour: black Uncut Mass: 63gr Length: 168mm Width: 168mm |
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JimT
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too late for many of my (no longer) new rubbers
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Single Ply Hinoki Club, Founding Member
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igorponger
Premier Member Joined: 07/29/2006 Location: Everywhere Status: Offline Points: 3252 |
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Some usefull HINTS: How to check your blade's actual square with a tailor's measuring tape. (a result within quite decent accuracy is well assured). -Take a measure of the blade's overall perimeter (P) Thus you can find out the blade's square inside the perimeter (S) =P^2 /4*3.14 Example: My TIBHAR L-IV blade's perimeter =50.5 cm. Blade's Square =2550.25 /12.56 =203.05cm^ ~203 cm^
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silvalis
Gold Member Joined: 09/10/2005 Location: Australia Status: Offline Points: 1006 |
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Hi All
Please format your data like this. If the rubber has a newer ITTF rubber code (ID number), please include it. Please use Models out of the ITTF database, as per their spelling. If the rubber has a specific version that differentiates it (eg, National, Blue Sponge, Euro, whatever) please indicate after ID and Model FOR EXAMPLE. Brand: Butterfly Rubber ID, Model, Sponge: 005 Spinart Thickness (max or in mm): max Colour: black Uncut Mass(g): 73.6 Length(mm): 176 Width(mm): 165 If the rubber has sides corners cut, you can also list the l/w of each corner. Eg Corner 1 X: 15 Corner 1 Y: 14 Corner 2 X: 16 Corner 2 Y: 13 Corner 3 X: 10 Corner 3 Y: 11 Corner 4 X: 12 Corner 4 Y: 11 Brand: Rubber ID/Model: Thickness (max or in mm): Colour: Uncut Mass(g): Length(mm): Width(mm): If you don't include everything, chances are your entry will not make it into the database. ONE MORE THING PLEASE INDICATE THE ID NUMBER IF AVAILABLE. |
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Potato Face
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silvalis
Gold Member Joined: 09/10/2005 Location: Australia Status: Offline Points: 1006 |
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Then you can multiply it by the grams per sqcm to give yourself an idea of what it will weight. Keep in mind that considering that the measurements in the database are open and submitted by lots of people, we're going to get some not-so-accurate measurements. |
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Potato Face
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karabijntje
Super Member Joined: 04/09/2010 Location: Netherlands Status: Offline Points: 233 |
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fatt, could you put a link to this database in the main post? |
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karabijntje
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Two new beauties arrived today , here's the data:
Brand: Stiga Rubber ID/Model: 68-003 / Boost TS Thickness: 2.0mm Colour: black Uncut Mass: 56gr Length: 168mm Width: 168mm Brand: Stiga Rubber ID/Model: 68-003 / Boost TS Thickness: 2.0mm Colour: red Uncut Mass: 56gr Length: 168mm Width: 168mm gr/cm2 = 56 / (16.8 x 16.8) = 0,1984127 |
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* TBS - Color - Spear - Virtuoso+
* Vega Pro / Europe |
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stiltt
Assistant Admin Joined: 07/15/2007 Location: Location Status: Offline Points: 1018 |
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done
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Ranger-man
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would the data we submit work even for rubbers that we have used. Let's say I have cut a rubber and glued it to my blade and played with it. Can I uses a left over piece that is about 5mm by 5mm (after carefully measuring it) and then posting the weight of that piece? Would that suffice? I am asking because I did not have a scale at first so I never weighed my rubbers, but now I have one, but the rubbers have been cut.
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stiltt
Assistant Admin Joined: 07/15/2007 Location: Location Status: Offline Points: 1018 |
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I think it's a VERY good question even though my gut feeling is that it will not work. |
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Conan the Greek
Super Member Joined: 05/02/2010 Location: United States Status: Offline Points: 266 |
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It shouldn't be too hard to derive the weight of an uncut piece of rubber from a 5cm square piece of rubber. Just divide the weight of the 5x5 by 25 to get the weight per sq cm, then multiple that figure by the area of an uncut piece of rubber (maybe around 300 - 310 sq cm?)
There could be a variable because of the weight of any residual glue. Any related thoughts? |
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stiltt
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The final value that's relevant to me is the weight per cm2. So yes weighting a 5cm x 5cm piece of used rubber and dividing the result by 25 would be just fine for my personal use (I would not need to extrapolate the mass of the whole uncut rubber from that value).
Anyway I just do not believe Silvalis will take it into consideration. Let's wait what he thinks.
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Conan the Greek
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Agreed. But as I said, used rubber with glue will weigh more than fresh rubber. That has to be taken into consideration. Otherwise, comparing used / spent F3 Big Slam to new Tenergy will likely favor the Butterfly rubber. We all know that is not the case for weight purposes. |
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igorponger
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Dear Silvalis, I used to consult your 'Weights Table' quite oftentimes and my first wish is that the Table gets some easier to handle. HEAR are the points to improve: 1. The OX-rubbes are of minor interest and should be listed into a separate table 2. The table column of "Weight per cm2": The 7-digit numbers are quite tiresome to operate with and thus should be pruned down to 4digits, e.g. 0.224332 --> 0.224 0.212571 -->0.213 Such a reduction will promote fine weight calculations even without CASSIO multi-digit computers :)
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karabijntje
Super Member Joined: 04/09/2010 Location: Netherlands Status: Offline Points: 233 |
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I don't think used rubbers should be taken into account. You can't
measure the amount of glue. Rubbers will be bought new, eventually. So
there's less submitted data over a period of time, but it's more accurate.
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* TBS - Color - Spear - Virtuoso+
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bozbrisvegas
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Silvalis does it have any worth to this forum thread to post what a 2.1 rubber and sponge weighs when cut to the head of butterfly blade?
In other words, if I tell you that the last 30 rubbers I cut all weighed at almost 47grams and all the last 20 f3 big slams weighed at about 33 grams, is that still usefull? sorry not sure. |
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silvalis
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hmm
It might be. I'd just have to figure out what the butterfly head size is. TBS? |
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Potato Face
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karabijntje
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Main head size for BTY blades is 150x157mm , TBS aswell.
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* TBS - Color - Spear - Virtuoso+
* Vega Pro / Europe |
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JRSDallas
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The blade face area of the Butterfly's 157 x 150 mm head (their most common size) is 194.5 sq. cm. Some of the blades with this head size are: TBS, Amultart, Schlager Carbon, Timo Boll ALC/ZLC/ZLF/T5000/W7, etceteras....
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Galaxy T1 89 gm
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Ranger-man
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I did not mean using used rubber per se, but the cuttings from rubbers that I have used. The cuttings are smaller, but still new, hence no wear on the surface, and no glue residue on the sponge, or any chance that the sponge may have retained some glue through absorbing or anything like that. As far as measuring the size of the cut piece. I guess a larger piece does cater to the chance that it would be like a large sample size in any statistical probability calculation and therefore a more accurate result. That is, if we think that no sponge is 100% uniform in density across its entire area.
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Darker Speed 90 10mm: Dawei IQUL
Ahinoki Lutz Spruce Jpen: 729 SuperFX Member: 1-ply Hinoki Club Violin/Acoustic Clan The speed of a Rhino and the power of a Gazelle! |
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stiltt
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Brand: Cornilleau
Rubber ID/Model: Pilot Advance
Thickness: 2.2mm Colour: red Uncut Mass: 63gr Length: 163mm Width: 169mm Brand: Cornilleau Rubber ID/Model: Pilot Advance
Thickness: 2.0mm Colour: black Uncut Mass: 63gr Length: 163mm Width: 169mm |
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gmarziou
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Brand: Andro
Rubber ID, Model, Sponge: 010 Hexer Duro Thickness (max or in mm): 1.7 Colour: black Uncut Mass(g): 60 Length(mm): 168 Width(mm): 168 |
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Zo k
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Brand: Joola
Rubber ID/Model: 40-001 / Express One Thickness: Max Colour: Red Uncut Mass: 62.5g Length: 168mm Width: 168mm ..... Brand: Joola Rubber ID/Model: 40-001 / Express One Thickness: Max Colour: Black Uncut Mass: 62.8g Length: 168mm Width: 168mm ..... Brand: Donic Rubber ID/Model: 21-006 / Baracuda Thickness: 2.0mm Colour: Red Uncut Mass: 62.7g Length: 168mm Width: 168mm ..... Brand: Donic Rubber ID/Model: 21-006 / Baracuda Thickness: 2.0mm Colour: Black Uncut Mass: 64.9g Length: 168mm Width: 168mm |
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OSP Ultimate 3 CRW ST
Victas V>01 Limber max Victas V>01 Limber 2.0 |
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gmarziou
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Brand: Cornilleau
Rubber ID/Model: 17-010 / Pilot Power Thickness: 1.8mm Colour: Black Uncut Mass: 52g Length: 165mm Width: 175mm |
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stiltt
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The info below is taken from there
Brand: Yasaka Rubber ID/Model: rakza7 Thickness: MAX Colour: Red Uncut Mass: 63g Length: 168mm Width: 168mm |
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stiltt
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Zo k
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Brand: Joola
Rubber ID/Model: 40-009 / Brave Thickness: 2.1mm Colour: Black Uncut Mass: 67.9g(without prot.sheets) Length: 168mm Width: 168mm |
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OSP Ultimate 3 CRW ST
Victas V>01 Limber max Victas V>01 Limber 2.0 |
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tompy
Super Member Joined: 06/12/2010 Location: Netherlands Status: Offline Points: 222 |
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Only problem is that you multiply a measuring tolerance (surface area and weight) also going from a measured 25 sqr cm back to an uncut sheet. Like 300 sqr cm is 60 grms. Meaning 25 sqr cm will be 5 grms. Most balances also have a worse precision weighing lower weights. Suppose total tolerance (area and weight) is ten percent (which could be a low estimate). If you messure 5 grms / sqr cm it could be 5,5 or 4,5 seams precise but it,s in between 54 and 66 grms ; twelve grams difference. |
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dek-dek
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Why does anyone care about the size or mass of a rubber? A few grams does not make that much of a differnce, just saying
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Timo boll spirit
Tenergy 05 Tenergy 64 |
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gmarziou
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It does make a difference when you are subject to tendinitis
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BBC 7-14-7 with Tenergy 64 FX 1.7mm on both sides
Darker Speed90 with Tenergy 64 FX 1.7mm on both sides |
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