Finding/Dealing with a Silicone Surprise

bkfinch

Semi-Pro
Hi Folks

I don't usually post too often, and this is for sure my first thread since joining here.

I play with the Head PT630, now for 3 years and I can't imagine anything better. However I want to reduce the grip size- the way I have it set up now, I have/had some lead in the handles to compensate for weight at the top of the racket, but my issue with it was that I could feel the lead making the handle a bit bigger. So I decided to find a way to put the weight into the butt cap...

One of the rackets, my favorite one, was sold with the description that it was a pro stock racket. I didn't really take notice since it played exactly the same and had the same specs as any usual PT630 (once I took out the lead tape it came with on the frame and replaced the CAP with a Radical grommet).

However once I took off the butt cap yesterday, what did I find... SILICONE in the handle. I couldn't believe it. It didn't/doesn't affect the feel of the racket since the racket feels exactly the same as two others which do not have silicone in the handle. This is what impressed me so much about the PT630, that three different models purchased at different times and places could feel the same and have pretty much the same specs.

On the right side of the hairpin there was not a lot of silicone, but on the left side as I was digging I could feel that the silicone ran rather deep. I realize that this is done with pro stock rackets but I was shocked because I would have expected the silicone to have had more of an impact on the racket's performance and specs in relation to the other two 'retail' PT630s I have. Then, more surprisingly as I was digging into the silicone, I discovered some fat metal weights (same left side) which obstructed my digging. So, I wonder perhaps if the racket came out 'lighter' than spec that Head put all this stuff into the handle. I gave up taking out the silicone from the left side though I removed the silicone on the right side and managed to fit a lead weight inside equal to the amount of lead which was before on the lower part of the handle. Then I noticed I had to compensate for another approx 3g of silicone which I had dug out. I put the butt cap back- the racket weighed the same but surprisingly the balance point moved up by about 4mm. This is a difference I can feel. So I tried to polarize the placement a bit better and I did succeed in lowering the balance point, but it is still a bit higher than where it was.

Which leads me to ask, is silicone denser than lead?? Should I try to 'cover up' the way I pseudo-massacred the silicone by putting more silicone back into the handle? Is putting silicone in the handle rather than blu tac/tungsten putty/lead a more effective way to add weight to the bottom of the racket without putting lead in the handle/making the handle bigger ? And I guess finally, by digging around in the silicone, did I screw up the frame? Any comments or suggestions would be most welcome and appreciated.
 

CopolyX

Hall of Fame
Always stuff cotton up the throat first to ensure no silicone gets into the frame. silicone will assist in the dampening also. but before jumping in the water, i remember sticky putty first to ensure you can fine tune the weight and it is easy to get out. customization should be done methodically , if you don't know what you are doing...don't do it. you will do more harm than good..to you are your frame...

http://www.periodictable.com/Properties/A/Density.al.html
 

bkfinch

Semi-Pro
Thanks!

The silicone which was already in the frame wasn't done by me. I've read threads/seen some videos about silicone and yea, I worry that a mistake could be irreversible so I would rather not do it.
 

teekaywhy

Professional
Silicone density <<< lead density.
For weight/mass purposes, I estimate it to be roughly equal to 1 but the MSDS sheet for the actual product you're using will tell you for sure.
That said, I use silicone with cotton balls as others have mentioned in order to contain the silicone in the handle.
If you dug out a good amount of silicone, then yes, you may have altered the weight/balance/sw of the racquet, obviously. The biggest challenge you may or may not have is keeping the weight from rattling. For that purpose alone you may want to refill with silicone unless you go with some other option.

Good luck.
 

time_fly

Hall of Fame
Yes, manufacturers stuff silicone, foam, and other bits of stuff into the handle to bring the balance and weight closer to spec. I've opened multiple copies of the same frame and found different materials and amounts of material in each of them.
Also, the thread title just brings to mind all sorts of additional comments.
 

bkfinch

Semi-Pro
Call the title a Freudian slip :rolleyes:

Thanks everyone, didn't except so much feedback. I'm playing tomorrow so I'll see if it rattles or anything like that. I managed to get it relatively back to the same spec, though to bring the balance down I added more weight into the handle. It is a few grams heavier but same balance and I assume preeettyyyy much the same swingweight. I don't go for super precise SW measurements since there is IMO a lot of human error involved so I essentially ballpark the numbers within a margin and let the feeling of the racket tell me if I have it right.

I would be willing to try a silicone experiment on a racket I don't really use to see if it really has any benefits. But as I said before, the feel of this racket is identical to the other two which do not have silicone in the handle. Didn't ever experience 'less' vibration or a more dampened feel or anything like that.
 

vsbabolat

G.O.A.T.
I have Pro Stock PT630 and retail PT630/280. They all are the same spec, made in different years, and all plays and feels identicle!!!
 

Tennisist

Professional
The fact that silicone was only in one of the channels suggests that it was done at the factory. Whenever I deal with people-modified racquets, they always distribute silicone equally between the channels. Also, people who modify racquets would not put a closed buttcap on. Those are not even available to people. Those closed buttcaps are only available at the factories.

Silicone and lead -- even when they weigh the same -- produce a very different "feel" in the racquet. So, even if the numbers match -- static weight, balance and swingweight -- the racquet will not play the same if you substitute one for another.
 

bkfinch

Semi-Pro
I have Pro Stock PT630 and retail PT630/280. They all are the same spec, made in different years, and all plays and feels identicle!!!

Yea, it's just incredible. I've never experienced that to such a degree with any other racket model I think and it's one of the reasons I am still insisting to play with the PT630. I saw that you wrote that the Angell TC97 18x20 is about as close as it gets... is that right? Anything else they make 'new' these days that can compare?
 

bkfinch

Semi-Pro
The fact that silicone was only in one of the channels suggests that it was done at the factory. Whenever I deal with people-modified racquets, they always distribute silicone equally between the channels. Also, people who modify racquets would not put a closed buttcap on. Those are not even available to people. Those closed buttcaps are only available at the factories.

Silicone and lead -- even when they weigh the same -- produce a very different "feel" in the racquet. So, even if the numbers match -- static weight, balance and swingweight -- the racquet will not play the same if you substitute one for another.

I could not dig out the silicone from the channel in which it ran at least a good 4-6" deep- the same channel filled with big metal bumps that seem to be weights fused to the hairpin- in the other channel it only went about half an inch deep, and after that it was totally hollow. I will maybe take a picture when I take out the buttcap again to replace the pallets. Still though based on the feeling of the racket compared to the other two, I would not have guessed that it had silicone.

I would be curious if silicone could cure that cheap twangy vibration sensation in newer rackets (i.e. MG Radical)...
 
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