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BPF1.15 is a lab test for regulating small-barrel Baseball bats used by 7-12 yr.-olds in Little League, Cal Ripken League, etc.

The large-barrel youth bats used elsewhere in youth baseball are not regulated by BPF1.15, or by any other bat testing standard.

BPF was originally invented to test slow-pitch softball bats in the mid-1990's.

BPF1.15 places an upper limit on a bat's springiness ("trampoline effect") as compared to that of a rigid wall, which equals BPF 1.00. Wood bats are virtually inelastic, with values of slightly more than 1.00. Small barrel youth bats are not supposed to exceed 1.15.

Validity of BPF1.15: Scientists consider BPF1.15 to be scientifically flawed as a test of a bat's springiness, and virtually useless at accurately predicting ball exit velocity, which is the prime metric of bat performance.

BPF1.15 does NOT measure or predict "how fast the ball exits the bat when hit", as some claim. BPF1.15 test results do not correlate reliably with field batted-ball speed according to Dr. James Sherwood, the head of the top baseball research lab in the U.S. (NY Times, 10/18/08)

Solid wood bats: Lacking a springy barrel, they generate batted-ball speed by clubbing the ball with their concentration of mass in the barrel (also called end-load, and scientifically described as a "higher MOI").

By contrast: Hollow non-wood bats compensate for less (overall) mass and end-load by gaining from: (a) their springiness, i.e., their barrels squish and rebound like a hand-held trampoline; and, (b) their engineered inertial qualities--their lighter overall weight as well as more evenly distributed weight (more balance, less end-load), which allow batters to swing hollow bats faster.

To put a cap on small barrel bat performance, BPF1.15 measures one factor (a), the springiness of hollow bats. BPF1.15 does not, however, take into account the other key factor, (b) the inertial qualities of hollow bats that enable greater swing-speed. BPF1.15 "ignores" swing-speed, and assumes that all types of bats can be swung at the same speed.

Further, in terms of predicting the (a) the springiness of small barrel bats under game conditions, BPF is defective. This is especially true for expensive high-end bats, for the following reasons:

1. BPF1.15 is conducted at an unrealistically low combined-ball-vs.-bat collision speed of 60 mph. High-end bats are designed to squish and spring-back optimally at realistic ball/bat collision speeds (for example, 50 mph pitch/50 mph swing = 100 mph) that occur in real games.

2. BPF1.15 is conducted on new bats that are not yet broken-in. Today's high-end bats--double-wall bats and carbon-fiber composite bats--have multiple walls and/or layers that do not propel the ball optimally until they are broken-in. (By contrast, the ASA softball bat test requires bats to be mechanically broken-in prior to testing.)

3. The BPF test protocol does not call for random compliance testing. There is no assurance that the performance of tested bats is representative of the performance of bats that are actually sold and used throughout the year.

4. The BPF1.15 lab test data has never been validated through field trials, which scientists consider to be a pre-requisite for legitimate scientific bat regulations.

For the above reasons, the BPF1.15 test does not accurately capture the barrel-springiness of small barrel bats in game conditions.

Until 2004, almost all small barrel baseball bats were relatively-inexpensive ($40-$150) single-wall aluminum bats. These are inherently limited in elasticity--bats get springier as wall-thickness is decreased, but thinner walls compromise durability. This limits single-wall bat designers. As a result, few single-wall bats can come close to testing at the BPF1.15 limit.

But recently-introduced high-end ($150-$250) multi-wall bats--double-walls, and multi-layered carbon-fiber composite models--are significantly springier, test much closer to the limit, and for the reasons cited above can surpass their tested values for elasticity when used in real game conditions.

To purchase a small barrel youth bat that has maximum springiness--and that very possibly will perform beyond the maximum allowable springiness--consumers should spring for an expensive double-wall or carbon-fiber composite bat.

To summarize: BPF1.15 does NOT measure exit velocity in the lab, does not reliably predict field exit velocity, does not account for swing-speed, and is imperfect at measuring and predicting a major contributor to exit velocity: the trampoline effect of modern hollow youth small barrel bats being used in game conditions. However, in the absence of BPF1.15, it it probable that many multi-wall small-barrel bats would perform even better than they currently perform. By comparison, youth large barrel bats are not subject to any performance regulations.

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βˆ™ 2009-01-09 15:53:18
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Q: What is BPF 1.15 on a baseball bat?
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Related questions

BPF on a baseball bat?

Is BPF 15 little league bat rating the same as 1.15


What does bpf mean on a baseball bat?

BPF is the Bat Performance Factor of a bat. During testing, a bat is locked into a stationary position and a baseball is shot towards the barrel at a high velocity. The BPF is how fast the ball goes after it bounces off of the bat. For instance, if the ball goes 10% faster after it comes off the bat, then the BPF is 1.10. Most leagues will not allow a bat with a BPF higher than 1.20 (or 20% higher velocity after it is struck)


What does BPF baseball bat mean?

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What is USSSA 1.15 BPF?

A United States Specialty Sports Association (USSSA) 1.15 Bat Performance Factor (BPF) is a small barrel baseball bat. The BPF standard is based on the laws of physics.


How do you find bpf on a baseball bat?

The "BPF" rating is stamped on the tapered part of the baseball bat, just above handle/grip. The way I understand it, if your bat doesn't have the new USSSA BPF stamp, its not legal to use in most leagues. Check your local league for clarification.


Which little league bat has a bpf of 1.2?

No Little League bat has a bpf of 1.2. As of Jan 2009, a LL bat cannot exceed bpf 1.15.


Are BPF and BBCOR the same in baseball bats?

No. BBCOR is a certification for a baseball bat to be used on the 90-foot base field. I don't even know what BPF is.


What is the highest BPF on a baseball bat possible?

If you want to know the answer you have to go to this website:


What does bpf stand for?

BPF is the Bat Performance Factor. When a bat is tested, it is fixed in a stationery position. A ball is launched at a high speed towards the barrel of the bat. When the ball bounces off of the bat, the speed is recorded to find out how much faster it goes when it comes off of the bat. That is how the BPF is calculated. If the ball comes off of the bat at the same speed, the BPF is 1.00 If the ball comes off of the bat 20% faster, the BPF is 1.20


Where to purchase a softball bat with 1.21 bpf?

Sports Authority, I did verify they have softball bats with 1.21 BPF.


What does 1.2bpf mean on a softball bat?

BPF is bat performance factor or the bounciness of the bat. The higher the number the more bounce a bat has which translates to the ball coming off the bat with more speed and inertia. Sanctioning bodies limit the BPF typically to a 1.20 or less.


Who has the fastest baseball bat speed?

The Rangers Josh Hamilton with a bat speed of 110-115 mph.

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