| DRILLING INSTRUCTIONS |
After
laying out the ball for drilling please follow these instructions to
insure transferability from ball to ball and size to size of the removable insert. |
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|
Step 1: Installation of
A&B Sleeves & Inserts |
|
Layout ball
as you would for any drilling. Mark the center of the thumb hole. Drill thumb hole exactly 3 3/32” deep (1 3/8” drill bit for
A’ sleeves 1 1/4 drill bit for B” sleeves). You must be sure
that you drill to the exact same depth and pitches on each ball that you are going to
install the same inserts into to assure true fit of the insert. Do not drill the hole deeper than 3 3/32”. The flange is not to hold the sleeve from going deeper than
3”; the purpose of the flange is for alignment only. Clean the hole free of dust and
debris and try the sleeve into hole for size. If installing into a previously drilled
ball, be sure to drill to the center of the existing hole to maintain the same span. |
|
Step
2: Installation of A&B Sleeves & Inserts |
|
We suggest
that you install all sleeves to accept the use of oval inserts, as the bowler may later
decide to use oval inserts, the ball will then be set up for oval use. Insert an oval
insert that is comfortable into the outer sleeve and insert the complete unit into the
ball. You can determine the proper angle by turning the complete unit until the customer
feels comfortable with the angle. Scribe a mark on the ball inline with the mark on the
top of the flange. Remove the unit from the ball, and remove the insert from the sleeve.
The outer sleeve is now ready to be glued into the ball. Rough the outer surface of the
sleeve as you would with a slug. (It is recommended to use 5 minute
epoxy to install sleeves to allow movement once inserted into ball.) Carefully
apply epoxy to the sleeve, avoid the area around the locking slot. Being sure to align the
mark on the top of the sleeves flange to the mark earlier scribed on the ball, firmly seat
the sleeve into the ball. Allow the epoxy to set before proceeding to next step. |
|
Step
3: Installation of A&B Sleeves & Inserts |
|
Once the
outer sleeve has been glued into the ball, mill off the sleeve flange flush with the ball
surface using a router or a plug cutter in drill press. Install the insert into the ball,
rotate so the pins on the bottom of the insert align with the holes in the bottom of the
sleeve. (It is not necessary to use
excessive force when turning the insert; when in proper position the insert will drop in
place and will not turn.) Insert a flat head
screwdriver into the slot in the locking device, and slide into locked position. Tighten
the screw head snug to assure proper locking of slide bar. The purpose of the screw is
only to hold the locking device in position, so there is no need to over tighten. |
|
Step
4: Installation of A&B Sleeves & Inserts |
|
With the
insert locked in place in the sleeve, mill the insert flush with the ball surface as was
done with the outer sleeve. Repeat the process for any additional inserts. Bevel and
finish the inserts as you would any type of slug. The inserts are easily shaped using
standard pro shop tools and equipment. When using a bevel sander take care to not over
heat to avoid creating a ridge in the inserts. Inserts can also be wet sanded in ball
spinner to give a super smooth surface, or sanded dry to whatever surface is desired. If
customer already has Thom’s Thum sleeve in the ball, only step 4 will be required. |
| THOM'S THUM HAS A LIFETIME REPLACEMENT GUARANTEE! |
For
Technical Support Call: |
(740)
815-3707 |
To
Contact Our Sales Department: |
(866)
922-0026 or sales@thomsthumb.com |
|
