FORM TOOL CENTER SETTING GAGE

THE SOMMA CENTER SETTING GAGE MAKES IT EASY TO SET CIRCULAR AND DOVETAIL FORM TOOLS EXACTLY ON CENTER.

ALL THAT IS REQUIRED IS THAT AN ADJUSTABLE COLLAR POST ASSEMBLY BE INSTALLED ON THE TOOL POST AND BE ADJUSTED TO CENTER PER THE FOLLOWING INSTRUCTIONS.

TO SET TOOL TO CENTER THE SWING ARM SETTING GAGE IS PLACED OVER THE COLLAR POST AND THE TOOL IS ADJUSTED SO THAT IT CONTACTS THE FOOT OF THE GAGE AND LOCKED IN PLACE.

THE SETTING GAGE IS THEN REMOVED AND CAN BE USED ON ANY OTHER SAME SIZE MACHINE.  THE ADJUSTABLE COLLAR POST IS LEFT ON THE TOOL POST AND NEED NEVER BE SET AGAIN EVEN IF THE TOOL POST IS REMOVED FROM THE MACHINE.  (NOTE: IF TOOL POST IS USED ON A DIFFERENT MACHINE IT MAY HAVE TO BE RESET FOR CENTER BECAUSE OF VARIATIONS FROM MACHINE TO MACHINE.)

INSTALLING THE ADJUSTABLE COLLAR POST AND BOLT ASSEMBLY:

MOUNT CIRCULAR OR DOVETAIL FORM TOOL POST TO CROSS SLIDE USING “T” BOLT

(PT 1).  SUPPLIED WITH THE “ADJUSTABLE COLLAR POST AND BOLT ASSEMBLY”.

IF YOU ARE NOT USING A RISER BLOCK UNDER THE CIRCULAR TOOL POST INSTALL THE RISER SPACER (PT. 6) OVER THE BOLT AND ON TOP OF THE TOOL POST FIRST AND THEN THE ADJUSTING POST WITH COLLAR ATTACHED (PT. 3&4).  SECURE TO TOOL SLIDE WITH THE NUT AND WASHER (PT. 2).

IF YOU ARE USING A RISER BLOCK UNDER THE CIRCULAR TOOL POST OR IF YOU ARE USING A SOMMA DOVETAIL HOLDER FOLLOW THE SAME PROCEDURE BUT DO NOT INSTALL THE RISER SPACER (PT. 6).

IF YOU ARE USING A SOMMA CTP-2 CIRCULAR TOOL POST OR A SOMMA DTH2 DOVETAIL TOOL POST ON THE NO. 2 B&S FOLLOW THE PRECEDING PROCEDURES BUT ALSO INSTALL THE 3/16” SPACER (PT. 7) UNDER THE RISER SPACER.

INSTALLING THE SWING ARM SETTING GAGE:

FIRST MOUNT A TOOL IN THE TOOL POST AND ADJUST IT MANUALLY TO EXACT CENTER.  THE BEST WAY TO DO THIS IS TO FACE OFF THE END OF A BAR WITH THE FORM TOOL.  ADJUSTING IT GRADUALLY UPWARD UNTIL THE FACE OF THE BAR IS PERFECTLY CLEAN, BUT BEING CAREFUL TO MAKE SURE THAT THE TOOL IS NOT ABOVE CENTER.

NEXT SLIP THE SWING ARM (PT. 1B) OVER THE ADJUSTING POST (PT. 3) LETTING IT REST ON THE ADJUSTING COLLAR (PT. 4).

LOOSEN THE SLIDING KNOB SCREW (PT. 4B) SEVERAL TURNS UNTIL THE KEY ON THE SETTING GAGE (PT. 2B) COMES OUT OF THE KEYWAY.  THEN ROTATE THE SETTING GAGE SO THAT THE FLAT SURFACES ON THE END FACE EITHER DOWN OR UP AS REQUIRED FOR THE DIRECTION OF THE ROTATION OF THE PART AND THEN SNUG UP THE KNOB SCREW.  NEXT SLIDE THE SETTING GAGE BACK OR FORWARD UNTIL THE FLAT RESTS ON THE FURTHEST EDGE OF THE TOOL THEN CLAMP SECURELY.

TIGHTEN THE CLAMP KNOB (PT. 5B) UNTIL THE SETTING GAGE IS SNUG ON THE ADJUSTING POST AND IN LINE WITH THE HIGH POINT OF THE FORM TOOL.  ROTATE THE ADJUSTABLE COLLAR TO RAISE OR LOWER THE SWING ARM SETTING GAGE UNTIL THE FLAT IS JUST CONTACTING THE EDGE OF THE CUTTING TOOL.  GAGE SHOULD NOW BE SET TO CENTER.

NEXT LOCK THE SPLIT ADJUSTABLE COLLAR SECURELY BY TIGHTENING THE SET SCREW (PT. 5) AND REMOVE SWING ARM SETTING GAGE FROM TOOL POST.  NOTE THAT AS LONG AS THIS SETTING IS NOT DISTURBED THE SWING ARM SETTING GAGE WILL ALWAYS BE ON CENTER WHEN IT IS PLACED ON THE POST AND RESTS ON THE COLLAR.

TO RESET TOOLS TO CENTER MERELY PLACE SWING ARM ON THE POST AND CLAMP IT SECURELY BEING SURE SURFACES ARE FREE OF CHIPS.  ADJUST CUTTING TOOL UNTIL ITS EDGE JUST CONTACTS THE SETTING GAGE AND LOCK IN PLACE.  TOOL SHOULD NOW BE ON EXACT CENTER.

WITH ADJUSTABLE COLLAR POSTS INSTALLED ON ALL YOUR TOOL POSTS SWING ARM SETTING GAGE CAN BE MOVED FROM MACHINE TO MACHINE.

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 IMPORTANT: FOR SAFETY REASONS SETTING GAGE MUST BE REMOVED BEFORE MACHINE IS RESTARTED.

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CENTER SETTING GAGE

FOR B&S FORM TOOLS

ADJUSTABLE COLLAR AND 

BOLT ASSEMBLY

SWING ARM SETTING GAGE