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Key principles Fingers are inserted into the second joint Thumb is seeded all the way into the bowling ball, up to the base of the thumb Good beginning grip Lower revolution rate at point of release Ball reaction is smaller and allows the bowler to focu...

Following these steps will ensure a proper fit Warm up the hand, massage/bowl Measure the MIDDLE FINGER Measure the THUMB FLEXIBILITY Measure FINGER and THUMB hole sizes Constants to fill out on the spec sheet Before starting the measurement, you...

Span: The distance between the fingers and thumb used for the purpose of gripping the ball.  Hole Size and Shape: The internal measurements and shape of the hole or insert used.  Pitch: The angle at which a hole is drilled in the ball. Pitch is defined...

Key principles Fingers are inserted to first joint Thumb is seeded all the way into the bowling ball, up to the base of the thumb More advanced grip​ Higher revolution rate at point of release​ Stronger ball reaction which allows the bowler to...

Following these steps will ensure a proper fit Warm up your hand ( either massage or bowl) Measure the MIDDLE FINGER Measure THUMB FLEXIBILITY Measure FINGER & THUMB hole sizes Constants to fill out on the spec sheet Before starting the measureme...

Turbo Quad                                                                                                                                 Power Oval: 0 Pitch in the grip No compensation needed Power Oval Mesh: 1/8" FORWARD pitch in the grip Com...

Vise Powerlift/Semi Powerlift: 1/4" FORWARD pitch in the grip Compensate 1/4" REVERSE when drilling the hole in the ball to arrive at the ending desired pitch Example: Normal Flex ( 1/4" REVERSE ) = Drill the hole 1/2" REVERSE because 1/2" - 1/4" = 1...

Ultimate Powerlift/Oval Powerlift: 1/4" FORWARD pitch in the grip Compensate 1/4" REVERSE when drilling the hole in the ball to arrive at the ending desired pitch Example: Normal Flex ( 1/4" REVERSE ) = Drill the hole 1/2" REVERSE because 1/2" - 1/4" =...

Contour Oval Oval: 0 pitch in the grip No compensation needed Contour Semi Cerise Semi: 3/16" FORWARD pitch in the grip Compensate 3/16" REVERSE when drilling the hole in the ball to arrive at the ending desired pitch Example: Normal Flex (...

Jopo Power Flat/Oval Power Flat: 1/4" FORWARD pitch in the grip Compensate 1/4" REVERSE when drilling the hole in the ball to arrive at the ending desired pitch Example: Normal Flex ( 1/4" REVERSE) = Drill the hole 1/2" REVERSE because 1/2" - 1/4" = 1/...

3 Measurements Smallest - Starting bit Largest - Width of oval Oval direction Taper base of thumb Measure the base of the thumb Start with that bit Go down 1/8'' max 1/32 step downs Go till the start...

There are 3 separate processes that have to be achieved in order to drill a ball for a bowler. First, we need the measurements for the bowler’s hand, whether that is copying previous measurements, or taking new ones (see chapter – Fitting). Second, we need t...

Milling machine / Drill press - Make sure it's clean when you start the job and that the pitches have been calibrated Drill bits - Make sure they have been sharpened recently Ruler - Span ruler that is accurate to at least 1/16" - Having a post to secure it ...

1)      Draw centre line and midline of grip 2)      Dividing the span of the middle finger in half, draw the span line for the middle                 finger and ring fingers 3)      Draw bridge lines 4)      Select the correct drill bit for the middle fi...

Follow these steps to create a new bowler profile On Desktop, click BOWLERS in the top menu On Mobile, click the avatar icon on the bottom left of the menu On the top right of your screen, Click ­ + Add Bowler Add the bowler's personal information....

To create the Spec Sheet Click on (Add Spec Sheets ) When your full span is determined , register on both section   Exemple : The flexibility must be indicated in order to determined what pitch of your thumb is suggested . Exemple : ...

Clone the sheet is the option that keep your old sheet saved and you can proceed to make any update on the hand of the bowlers. 1. To clone the sheet , click on clone button  Then you can name the update the name of the sheet  ex: Then click the check...

1. You can notice the type of span by click the button ( grip type ) 2. Then you can select the type of grip  When the selection is made click the arrow  button and the sheet is set 

1. The type of thumb information is found on this section of the spec sheet . To proceed to measuring an oval thumb the selection of the hole type must be in dark blue . ex: The starting bit is the the drill bit you use to make the oval thumb. When you size ...

To enter the Round thumb information, click " Round" Button on thumb info section located  on  Spec Sheet . EX: When the size of the thumb is determined , click on "Size" button and wrote the size selected. EX:   The Taper is the next step to co...