https://www.bigdawgbatrolling.com/bat-shaving.htm
Bat shaving is a service that thins the inside wall of a composite bat’s barrel for the purpose of hitting the ball farther, and some would say increasing the diameter of the barrel of the bat.

https://www.bigdawgbatrolling.com/ There is one scientific study that Daniel A. Russell, Ph.D. did, Graduate Program in Acoustics,
The Pennsylvania State University https://www.acs.psu.edu/drussell/bats/abi.html
This study is quoted by a few aluminum bat rolling enthusiasts who claim the study proves rolling alloy bats work. Unfortunately, this is not the case; the only scientific study out there was done with a double-walled aluminum bat. The increase in distance with a double-walled alloy bat is a result of the thin layer of foam bat companies put in between the double barrels. This foam could be broken up by bat rolling and yield distance and exit velocity gains. Today’s alloy bats are single walls, and some have restrictor rings in the middle of the barrel. Bat rolling, heated bat rolling, or a natural break-in does not help these single wall bats with exit velocity as some would have you believe. Here is a video of bats being compression tested before and after Heat rolling, bat rolling, and perpendicular rolling.

https://www.bigdawgbatrolling.com/ Everyone knows by now that the longer you hit a composite bat the better it performs but everyone does not know about the speedy bat break-in process known as bat rolling. This procedure is a quicker way to break in a bat; otherwise known as ABI (accelerated break-in). A new composite bat has layers of fibers that are held together by resin. The resin will “break down” when pressure is placed on the bat; by striking a ball or bat rolling. The bat is placed between 3 rollers (most articles will say 2 rollers because they do not roll bats, just write articles), 2 upper rollers and 1 lower roller. There is a handle on the top of the bat rolling machine to crank the top 2 rollers down to add the needed pressure. The side handle is used to run the bat through the roller either perpendicular or parallel. The pressures are determined by the roller operator or he gets his maximum pressures from a bat rolling guide. Once the bat has been rolled around and through the rollers the composite fibers are now loosened and more flexible. This increased flex will cause a trampoline effect propelling a batted ball further. Stretches and breaking up the resin fibers will also lengthen the sweet spot of a bat. Here are the 3 big questions I hear about bat rolling the most.

https://www.bigdawgbatrolling.com/ bat shaving is accomplished through thinning of the barrel walls this makes the barrel more flexible. The barrel now will compress more when impacted with a baseball or softball. This compression gives off a greater trampoline effect when the walls are thinner; Like pulling a bow back farther to shoot an arrow. The increased flex causes increased mph on the batted ball. Bat shaving also increases the size of the bat’s sweet spot by 40% because of the increased flex.

4 tips for Cold Weather and Bats
Good and Bad of Bats and Cold Weather
The relationship between cold weather and bats is a double-edged sword. Let me first define what cold weather is; temperatures below 65 degrees. The relationship between cold weather and bats is a double-edged sword. The ball will jump off the bats faster in cold weather because the cold temperature makes a ball denser. The ball makes the bat flex more because of the hardness, causing more trampoline effect. The extreme flex can also cause a bat to crack prematurely.

Balls will travel farther in Cold Weather
Cold weather will produce significant gains in pop and distance to a shaved bat, rolled bat, or an unaltered bat. Worth Sports have done scientific studies, and their data is interesting. Balls were tested at 72 degrees, and they found that for every 1 degree, the compression changed by 5lbs. So moving down the scale from 72 degrees, a ball would perform better, and move up the scale, it would perform worse. That is why the ball seems to jump off the bat more in the spring and fall, and in the hot summer, your batted ball seems to lose pop.

Bats are at risk to break in cold weather
Any composite bat is more likely to break in cold weather, and we do not recommend use in cold weather, nor do the bat manufacturers. A bat warmer will help, but the balls are the real culprit. Going for batting practice on a day of 70 degrees seems excellent. Still, if those balls were kept in the garage or trunk overnight with 45-degree temperatures, you will be in trouble. Even with the warnings and recommendations from bat companies and here at Big Dawg, people will still go out and use bats in cold weather.
During the summer season, we do not have more than one or two bat-breaking complaints (an amazing stat). During the spring and fall, we will get some bat-breaking complaints, and when the temperatures are checked, it has been under 65 degrees in their area. It isn’t always shaved bats that people are asking about; rolled bats or unaltered will break just the same. I broke a Z series bat in the batting cage over the winter (clean in half). I had made sure the balls I brought were kept inside my house, but one of my teammates brought his bag of balls left in his trunk. There were plenty of other bats used, but I should have known not to pull out the Louisville Slugger because they have a reputation to break easily in any weather.
Important points:

4 Cold Weather and bat tips

1 Do not use bats in cold weather under 65 degrees
2 Store your balls in a warm place; not your trunk, basement or garage.
3 A bat warmer will help but cold balls can still break bats
4 Do not use your best bat in cold weather
https://www.bigdawgbatrolling.com/