Author Topic: refinishing urethane (Read 11164 times)

r534me · « **on:** April 14, 2011, 08:42:06 AM »

I have a used blue hammer and a black u dot I am refinishing and I am wondering what steps to use. My driller recommended starting with 320 Grit sand paper. How long should I use that? The ball has a fews years of bowling on them. After the track has been cleaned up with grits are next?

Thanks!

Edited by r534me on 6/14/2011 at 10:28 PM

Juggernaut · « **Reply #1 on:** April 14, 2011, 04:55:24 PM »

I can't remember the u-dot for certain, but the old Black HAMMER came from the factory at 320 dull sanded unless special ordered differently.

r534me · « **Reply #2 on:** April 14, 2011, 05:36:05 PM »

hitting the blue hammer with 320 should be good then?

Thanks!

Juggernaut · « **Reply #3 on:** April 14, 2011, 06:44:50 PM »

Yes, just taking it down to a good, clean 320 sanded finish should be fine.

Those older urethane balls WILL soak up some oil, but MUCH slower than modern reactives. If it has never been de-oiled, you might want to do that as well.

Back when they were popular, I had several different ones (red, blue, black and pink) that would all bleed(except the pink, it never did) during the hot summer when left in the car.

r534me wrote on 4/14/2011 5:36 PM:
hitting the blue hammer with 320 should be good then?

Thanks!

r534me · « **Reply #4 on:** April 14, 2011, 07:47:21 PM »

I was wondering if they did or didn't absorb oil. Very good tip. I will heat it up and see if anything comes out. The blue hammer's serial number in the begins with a 94. I guess that means it was made in 1994? I am not sure where the pin is on it.

My idea is to use these guys to practice with during the summer to improve my accuracy and speed control.

Juggernaut · « **Reply #5 on:** April 14, 2011, 09:22:46 PM »

Yes, that should denote the model year as 1994. And, on these balls, the pin is the same as the ball color, so can be hard to find. They are usually very close to the "target" area, at a 1:00 to 1:30 position. Many times, the only way to find them is to rub alcohol ( or some other swiftly evaporating liquid) in that area and watch for the small circle that dries just ever so slightly slower.

Back then, I used to put a small nick in the pin to make it easier to see once I found it.

r534me wrote on 4/14/2011 7:47 PM:
I was wondering if they did or didn't absorb oil. Very good tip. I will heat it up and see if anything comes out. The blue hammer's serial number in the begins with a 94. I guess that means it was made in 1994? I am not sure where the pin is on it.

My idea is to use these guys to practice with during the summer to improve my accuracy and speed control.

r534me · « **Reply #6 on:** April 14, 2011, 10:19:28 PM »

The ball I have has three fingers drilled in it. I wonder if they drilled out the pin when the extra finger was drilled. Can my PS weigh it out and find the pin?

Juggernaut wrote on 4/14/2011 9:22 PM:
Yes, that should denote the model year as 1994. And, on these balls, the pin is the same as the ball color, so can be hard to find. They are usually very close to the "target" area, at a 1:00 to 1:30 position. Many times, the only way to find them is to rub alcohol ( or some other swiftly evaporating liquid) in that area and watch for the small circle that dries just ever so slightly slower.

Back then, I used to put a small nick in the pin to make it easier to see once I found it.

r534me wrote on 4/14/2011 7:47 PM:

I was wondering if they did or didn't absorb oil. Very good tip. I will heat it up and see if anything comes out. The blue hammer's serial number in the begins with a 94. I guess that means it was made in 1994? I am not sure where the pin is on it.

My idea is to use these guys to practice with during the summer to improve my accuracy and speed control.

Juggernaut · « **Reply #7 on:** April 14, 2011, 10:38:54 PM »

They won't be able to find the pin simply by weighing it.

While it is possible that the pin was drilled out, you must remember that the great majority of these things were VERY short pins, and usually ended up either inside the target circle or right on the edge of it.

Back before much was known about weigh block dynamics, balls with the pin very far out were considered faulty, so the great majority of these old balls had pins within 1/4 inch of center.

You can find some of them pin out occasionally, but not very much and not very many. I once found an old red Hammer with a 3-4 pin, so they're out there, but not common.

r534me · « **Reply #8 on:** April 14, 2011, 10:44:51 PM »

Thanks! Once I read your post I checked the logo and the pin was almost dead center in the Fabell logo. Talk about a short pin!

r534me · « **Reply #9 on:** April 14, 2011, 10:48:08 PM »

I remember I had a blue hammer that was a second and it was for that very reason.the pin was 2-3 inches out. It rolled real well too considering my driller at the time had no idea how to place pins anywhere. In fact, on a U2 he put the pin in the quad for a right hander and I couldn't figure out why it rolled early and stopped. I ended up trading the ball and years later found it he drilled it wrong.

Juggernaut wrote on 4/14/2011 10:38 PM:
They won't be able to find the pin simply by weighing it.

While it is possible that the pin was drilled out, you must remember that the great majority of these things were VERY short pins, and usually ended up either inside the target circle or right on the edge of it.

Back before much was known about weigh block dynamics, balls with the pin very far out were considered faulty, so the great majority of these old balls had pins within 1/4 inch of center.

You can find some of them pin out occasionally, but not very much and not very many. I once found an old red Hammer with a 3-4 pin, so they're out there, but not common.

Juggernaut · « **Reply #10 on:** April 14, 2011, 11:16:03 PM »

Two friends of mine went to the shop, and both ordered blue Hammers. when they came in, they had them drilled similarly. Finger weighted with enough positive sideweight to keep them going.

Went out to the lanes and tried them out. One of them would hook the entire lane and lay waste to the pins. The other one struggled, looked weak, and wouldn't knock over hardly anything.

We just chalked it up to him getting a "bad" ball. If we had known then what we know now, we could've figured it out and fixed it.

P.S. Looking back now, the hooking one had a 3-4 pin out and ended up being drilled "stacked" (the guy still has it), but don't know about the other one as he got rid of it pretty quick.

r534me · « **Reply #11 on:** April 15, 2011, 02:27:53 AM »

I remember lots of people axis weighting their blue hammers. I think they drilled out the pin to do that...not 100% sure of that.

Did you ever have a Phantom? I had two and no one could figure out how to drill them.

charlest · « **Reply #12 on:** April 15, 2011, 08:08:22 AM »

FWIW I recall one set of tested data back in the 90s, comparing urethane absorption rates to resins (keep in mind that resins seem to absorb oil much faster now!). The results were that urethane absorbed oil at a ratio of 20:1 slower than resins.

Also keep in mind that urethane don't hook by absorbing oil. Theirs is strictly based on surface, as far as I know. and the key here is that they DO absorb oil. After years of use, it might be a good idea to try an oil extraction on yours. Who knows how little or how much might come out.

Still a good idea to clean every ball after use. If the oil is still lying there on top of the surface, like with urethane and plastic, then it will be easy to remove.

r534me wrote on 4/14/2011 7:47 PM:I was wondering if they did or didn't absorb oil. Very good tip. I will heat it up and see if anything comes out. The blue hammer's serial number in the begins with a 94. I guess that means it was made in 1994? I am not sure where the pin is on it.

"None are so blind as those who will not see."

BowlingChat.net

"Some bowlers are crazy as pickled cats."

Juggernaut · « **Reply #13 on:** April 15, 2011, 08:51:59 AM »

Ahhhh the Phantom. No, I never actually OWNED one, but I did throw a few. First one I ever saw, the guy who ran the shop bought one. He drilled it for a medium reaction, but that thing wouldn't even make it to the pins before hitting the gutter.

It flared about 2-3inches and wanted to hook in the heads. He sold it to a cranker who ultra polished it, but threw it about 18mph. He just killed stuff with it.

r534me wrote on 4/15/2011 2:27 AM:
I remember lots of people axis weighting their blue hammers. I think they drilled out the pin to do that...not 100% sure of that.

Did you ever have a Phantom? I had two and no one could figure out how to drill them.

r534me · « **Reply #14 on:** April 15, 2011, 10:14:20 AM »

I bought back a nitro r2 I sold to a friend. I sold it to him in 2004 and he never used it. I heated it up last week and not a drop of oil came out. In fact, not a drop of anything came out. I am sure he didn't extract it but he could have left it out in the sun. I'll have to ask him.

Once I hit the balls with some 320 grit I'll heat them up and see if any stuff comes out it.

It will be fun to see how many pocket 7-9 I can leave with these balls because there is so much more oil on th lanes and my high ball speed. I do have the revs to match it but when I miss on the bottom it's going to be trainwreck with urethane.

charlest wrote on 4/15/2011 8:08 AM:
FWIW I recall one set of tested data back in the 90s, comparing urethane absorption rates to resins (keep in mind that resins seem to absorb oil much faster now!). The results were that urethane absorbed oil at a ratio of 20:1 slower than resins.

Also keep in mind that urethane don't hook by absorbing oil. Theirs is strictly based on surface, as far as I know. and the key here is that they DO absorb oil. After years of use, it might be a good idea to try an oil extraction on yours. Who knows how little or how much might come out.

Still a good idea to clean every ball after use. If the oil is still lying there on top of the surface, like with urethane and plastic, then it will be easy to remove.

r534me wrote on 4/14/2011 7:47 PM:
I was wondering if they did or didn't absorb oil. Very good tip. I will heat it up and see if anything comes out. The blue hammer's serial number in the begins with a 94. I guess that means it was made in 1994? I am not sure where the pin is on it.

"None are so blind as those who will not see."

BowlingChat.net

"Some bowlers are crazy as pickled cats."

Author Topic: refinishing urethane (Read 11164 times)

r534me

refinishing urethane

Juggernaut

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