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More Information

Things To Remember

These are basic drillings and are recommended starting points. However, these balls can be drilled many different ways and could/should be fined tuned to meet the needs of each individual bowler. Do no hesitate to adjust the drill pattern to match the lane conditions and the bowler's personal characteristics such as ball speed, revolutions and axis rotation.

The illustrations of the drill patterns show the PIN, CG (Center of Gravity), Extra Hole placement and the PAP (Bowler's Positive Axis Point). We used a PAP of approximately 5 inches straight over for the purposes of our illustrations.

Recognize that all illustrations shown are for right-handers. Reverse drill pattern for left-handers.

Top Weight: High top weight tends to make the ball skid further and store energy through the front end of the lane. We recommend high top weight for drier lanes or bowlers with below average ball speed, medium top weight for medium oil and medium ball speeds and low top weight for heavy oil or bowlers with above average ball speed.

Extra Holes: Extra holes are required in several drillings. We recommend placing the hole on the positive axis point or one inch past most of the time. Be careful! Please consider the strength of the bowler's release and the drill pattern being used before selecting the extra hole position more than one inch past the bowlers positive axis point.

Static Side Weight: We recommend that all balls be drilled with approximately ½ ounce side weight to start. If the bowler wants to reduce back end reaction, gradually remove the positive side weight.

Surface: the surface of today's balls play an extremely important role in matching the bowler's needs with the lane conditions where they bowl. To create the best ball reaction, do no hesitate to adjust the surface by sanding or polishing. To add control and move the breakpoint closer to the bowler, increase the friction of the ball by sanding. To delay the breakpoint and increase the flip potential in the back end of the lane, reduce the friction of the ball by polishing.

How to Use Drilling Instructions

  1. Select pin position to determine the amount of flare and hook needed.
  2. Select Mass Bias placement to determine the desired reaction shape (I.E. Arc, Flip, or Forward Roll)
  3. Use balance hole placement to fine tune total flare and length
  4. Adjust the surface to control overall hook

Coverstock Maintenance

  1. Wiping the ball between shots (preferably with a micro-fiber towel.)
  2. Cleaning the ball AFTER the league or tournament session is done with a strong emulsifying cleaner.
  3. After extensive usage, use a product designed to remove oil from the coverstock.
  4. Polishing - if you desire to polish the coverstock it will help reduce the friction in oil and allows the ball to retain more energy and still provide the same strong, continuous back end.

Basic Drilling Instructions

The following seven drilling layouts are basic drill patterns for today's high performance bowling balls. They include five drill patterns for "Semi-Rollers" and two drill patterns for "Full rollers."

Drilling #1 - Label Drilling

Track Label Drilling Diagram
Drill Pattern:
Label (5 x 5)
Ball Reaction:
This pattern will create medium flare potential, give the most skid throughout the front part of the lane and a strong back end reaction. It will work better than the other patterns when the lanes begin to break down.

Drilling #2 - Label Leverage Drilling

Track Label Leverage Drilling Diagram
Drill Pattern:
Label Leverage (3 3/8 x 5)
Ball Reaction:
This pattern will generate the highest flare potential, create medium to strong skid through the front part of the lane and big back end reaction.

Drilling #3

Track Drilling Diagram #3
Drill Pattern:
(4½ x 3½, Extra Hole 1" beyond PAP)
Ball Reaction:
This pattern will generate strong flare potential, create medium skid through the front part of the lane and the most dramatic reaction at the breakpoint.

Drilling #4

Track Drilling Diagram #4
Drill Pattern:
(4; x 2, Extra Hole 1" beyond PAP)
Ball Reaction:
This pattern will generate high flare potential and create early to medium roll through the front part of the lane. This layout works well on heavy oil and promotes and even, very controllable reaction in the back end of the lane.

Drilling #5

Track Drilling Diagram #5
Drilling Pattern:
(4 x 0, Extra Hole on PAP)
Ball Reaction:
This pattern will generate high flare potential and create the earliest roll. this drill pattern is the most even reaction on the back end of the lane and will work best on wet/dry lane conditions of all the drill patterns shown.

Drilling #6 - Full Roller (Label)

Track Full Roller (Label) Drilling Diagram
Drill Pattern:
Full Roller - Label
Ball Reaction:
This pattern will generate little to no flare potential and create good length through the front part of the lane. this layout basically takes the core out of play and ball reaction is determined by the aggressiveness of the coverstock material and the strength of the player's release.

Drilling #7 - Full Roller Leverage

Track Full Roller Leverage Drilling Diagram
Drill Pattern:
Full Roller Leverage (Pin @ 7:30 position, 3 3/8 inches from center of grip)
Ball Reaction:
This pattern will generate the most flare potential for a Full roller releases. This layout creates medium length through the front part of the lane and the most overall hook.

Robo-core Drilling Layouts

Pin to Positive Axis Point Distance Chart

Tracks Pin To PAP Chart

Strongly Speed Dominant Drilling

Strong Reaction

Track Robo Core Speed Dominant Strong Reaction Drilling Diagram

Mass Bias:
5-¾",4-¾", 4
Pin Placement:
Pin 3-½" from PAP
Pin 1-½" from VAL
Balance Hole
Balance Hole on VAL

Medium Reaction

Track Robo Core Speed Dominant Medium Reaction Drilling Diagram
Mass Bias:
MB 4-¾", 4",3-¼"
Pin Placement:
Pin 3-½" from PAP
Pin even or slightly higher than finger line
Balance Hole:
Balance hole on VAL

Smooth or Long Transition

Track Robo Core Speed Dominate Smoother Or Long Transition Drilling Diagram
Mass Biass:
MB 4-¾", 4" , 3-¼"
Pin Placement:
Pin 3-½" from PAP
Pin 1-½" above mid-line
Balance Hole:
Balance hole on VAL

Strongly Rev Dominant Drilling

Strong Reaction

Track Strongly Rev Dominant Strong Reaction Drilling Diagram
Mass Bias
MB 6-¾" , 5-¼"
Pin Placement:
Pin 5" from PAP
Pin ½" to ¾" above fingers
Balance Hole:
Balance Hole on VAL

Medium Reaction

Track's Strongl;y Rev Dominant Medium Reaction Drilling Diagram
Mass Bias:
MB 5-18", 3-½"
Pin Placement:
Pin 5-½" from PAP
Pin ¾" above fingers
Balance Hole:
Balance Hole on VAL

Delayed Reaction

Track's Strongly Rev Dominant Delayed Reaction Drilling Diagram
Mass Bias:
MB 6-¾", 6-1/8"
Pin Placement:
Pin 2" and 1-½" from VAL
Balance Hole:
Balance hole on VAL

Rev & Speed Rate Match Drilling

Strong Reaction

Track's Rev & Speed Rate Match Strong Reaction Drilling Diagram
Mass Bias:
MB 6-¾", 5-¾",4-¾"
Pin Location:
Pin 3-½" from PAP
Pin even or slightly above finger line
Balance Hole:
Balance hole on VAL

Medium Reaction

Track's Rev& Speed Rate Match Medium Reaction Drilling Diagram
Mass Bias:
MB 6-¾",5-½",4-3/8"
Pin Placement:
Pin 4" from PAP
Pin even or slightly above finger line
Balance Hole:
Balance hole on VAL

Delayed Reaction

Track's Rev & Speed Rate Match Delayed Reaction Drilling Diagram
Mass Bias:
MB 5-3/8",4",3-1/8"
Pin Placement:
Pin 4-½" from PAP
Pin slightly above finger line
Balance Hole:
Balance hole on VAL

Mildly Rev Dominant Drilling

Strong Reaction

Track's Midly Rev Dominant Strong Reaction Drilling Diagram
Mass Bias:
MB 6-¾", 5-3/8", 4"
Pin Placement:
Pin 4-½" from PAP
Pin on or slightly above finger line
Balance Hole:
Balance Hole on VAL

Medium Reaction

Track's Midly Rev Dominant Medium Reaction Drilling Diagram
Mass Bias:
MB 3-¾", 2-¾"
Pin Placement:
Pin 5" from PAP
Pin on or slightly above finger line
Balance Hole:
Balance hole on VAL

Delayed Reaction

Track's Midly Rev Dominant Delayed Reaction Drilling Diagram
Mass Bias:
MB 6-¾",6"
Pin Placement:
Pin 2-½", and 1-½" from VAL
Balance Hole:
Balance hole on VAL

Mildly Speed Dominant Drilling

Strong Reaction

Tracks Midly Speed Dominant Strong Reaction Drilling Diagram
Mass Bias:
MB 6-¾",5-¾",4-¾"
Pin Location:
Pin 3-½" from PAP
Pin 1-½" frin VAL
Balance Hole:
Balance hole on VAL.

Medium Reaction

Tack's Midly Speed Dominant Medium Reaction Drilling Diagram
Mass Bias:
MB 5-¾", 4-¾", 4"
Pin Location:
Pin 3-½" from PAP
Pin even or slightly above midline
Balance Hole:
Balance hole on VAL

Delayed Reaction

Track's Midly Speed Domimant Delayed Reaction Drilling Diagram
Mass Bias:
MB 4-3/8", 3-½", 2-¾"
Pin Location:
Pin 4" from PAP
Pin even or slightly above finger line
Balance Hole:
Balance hole on VAL

Rising Series Drilling

Drilling Layout 1
Increased Length with Strong Backend Hook

Place pin on the centerline above the fingers. Place the mass bias 3" right of the centerline.
Track's Equation Drilling Layout 4

Drilling Layout 2
Length with Angular Backend Motion

Place the pin 5" from the PAP and 1" from the Vertical Axis Line (VAL). Place the mass bias 3" inside the VAL.
Track's Equation Drilling Layout 4

Drilling Layout 3
Aggressive Hook with Strong Backend

Place pin 4" from PAP and 2" from the Vertical Axis Line (VAL). Place the mass bias 1" inside the VAL.
Track's Equation Drilling Layout 4

Drilling Layout 4
Length with Smooth Backend Motion

Place pin 5" from PAP and 3" from the Vertical Axis Line (VAL). Place the mass bias on the VAL.
Track's Equation Drilling Layout 4

Drilling Layout 5
Full Roller Layout

Place pin 3 1/2" at 7:30. Place the mass bias on the VAL.
Track's Equation Drilling Layout 4


Up-Rising Drilling

Drilling Layout 1
Increased Length with Strong Backend Hook

Place pin on the centerline above the fingers. Place the mass bias 3" right of the centerline.
Track's Equation Drilling Layout 4

Drilling Layout 2
Length with Angular Backend Motion

Place the pin 5" from the PAP and 1" from the Vertical Axis Line (VAL). Place the mass bias 3" inside the VAL.
Track's Equation Drilling Layout 4

Drilling Layout 3
Aggressive Hook with Strong Backend

Place pin 4" from PAP and 2" from the Vertical Axis Line (VAL). Place the mass bias 1" inside the VAL.
Track's Equation Drilling Layout 4

Drilling Layout 4
Length with Smooth Backend Motion

Place pin 5" from PAP and 3" from the Vertical Axis Line (VAL). Place the mass bias on the VAL.
Track's Equation Drilling Layout 4

Drilling Layout 5
Full Roller Layout

Place pin 3 1/2" at 7:30. Place the mass bias on the VAL.
Track's Equation Drilling Layout 4


Rising Drilling

Drilling Layout 1
Increased Length with Strong Backend Hook

Place pin on the centerline above the fingers. Place the mass bias 3" right of the centerline.
Track's Equation Drilling Layout 4

Drilling Layout 2
Length with Angular Backend Motion

Place the pin 5" from the PAP and 1" from the Vertical Axis Line (VAL). Place the mass bias 3" inside the VAL.
Track's Equation Drilling Layout 4

Drilling Layout 3
Aggressive Hook with Strong Backend

Place pin 4" from PAP and 2" from the Vertical Axis Line (VAL). Place the mass bias 1" inside the VAL.
Track's Equation Drilling Layout 4

Drilling Layout 4
Length with Smooth Backend Motion

Place pin 5" from PAP and 3" from the Vertical Axis Line (VAL). Place the mass bias on the VAL.
Track's Equation Drilling Layout 4

Drilling Layout 5
Full Roller Layout

Place pin 3 1/2" at 7:30. Place the mass bias on the VAL.
Track's Equation Drilling Layout 4


Equation Drilling

Drilling Layout 1
3-½" x 3-½" CG Down

Track's Equation Drilling Layout 1

This pattern will hook the earliest and works best on synthetic lane surfaces. It produces the highest amount of flare potential and when getting the ball to respond in the mid lane is a priority.


Drilling Layout 2
Leverage (3-3/8" x 4-½")

Tracks Equation Drilling Layout 2

This pattern will generate the high flare potential, create medium to strong skid through the front part of the lane and a medium to strong back end reaction.


Drilling Layout 3
4" x 2", Extra Hole 1" beyond PAP

Track's Equation Drilling Layout 3

This pattern will generate high flare potential and create early to medium roll through the front part of the lane. This layout works well on heavy oil and promotes an even, very controllable reaction in the back end of the lane.


Drilling Layout 4
4-½" x 3-½", Extra Hole 1" Beyone PAP

Track's Equation Drilling Layout 4

This pattern will generate medium flare potential, create medium skid through the front part of the lane and the most dramatic reaction at the breakpoint.


Drilling Layout 5
2½" x 5", No Balance Hole

Track's Equation Drilling Layout 5

This pattern produces medium hook and the most controllable back end reaction of all the drilling patterns shown. This layout performs well for high-rev players or on shorter oil patterns, wet/dry conditions and when the back ends are very dry.


Drilling Layout 6
Label (5" x 5 ")

Track's Equation Drilling Layout 6

This pattern will create medium flare potential, give the most skid through the front part of the lane and a strong back end reaction. It will work better than the other patterns when th lanes begin to break down.


Drilling Layout 7
Full Roller-Leverage
(Pin @ 7:30 position, 3-3/8" from center of grip)

Track'sEquation Drilling Layout 7

This pattern will generate the most flare potential for Full Roller releases. This layout creates medium length through the front part of the lane and the most overall hook.


Drilling Layout 1
Label (5" x 5")

Tracks Heat Label 5x5 Drilling Layout
This pattern will create medium flare potential, give the most skid through the front part of the lane and a strong back end reaction. It will work better than the other patterns when the lanes begin to break down.

Drilling Layout 2
Label Leverage (3-3/8" x 5")

Track's Heat Label Leverage Drilling
This pattern will generate the highest flare potential, create medium to strong skid through the front part of the lane and a big back end reaction.

Drilling Layout 3
4-½" x 3-½", Extra Hole 1" beyond PAP

Track's Heat Extra Hole Drilling Layout
This pattern will generate strong flare potential, create medium skid through the front part of the lane and the most dramatic reaction at the breakpoint.

Drilling Layout 4
4" x 2", Extra Hole 1" beyond PAP

Track's Heat Extra Hole Layout 2
This pattern will generate high flare potential and create early to medium roll through the front part of the lane. This layout works well on heavy oil and promotes an even, very controllable reaction in the back end.

Drilling Layout 5
4" x 0", Extra Hole on PAP

Track's Heat Extra Hole Drilling Layout 3
This pattern will generate high flare potential and create the earliest roll. This pattern is the most even reaction on the back end of the lane and will work the best on wet/dry lane conditions of all the drill patterns shown.

Drilling Layout 6
Full Roller Label

Track's Heat Full Roller Label Drilling Layout
This pattern will generate little to no flare potential and create good length through the front part of the lane. This layout basically takes the core out of play and the ball reaction is determined by the aggressiveness of the coverstock material and the strength of the player's release.

Drilling Layout 7
Full Roller - Leverage (Pin at 7:30 position, 3-3/8" from center of grip)

Track's Heat Full Roller Leverage Drilling Layout
This pattern will generate the most flare potential for Full Roller releases. This layout creates medium length through the front part of the lane and the most overall hook.