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Long stop pin, S-Press
 
Long stop pin, S-Press Quantity in Basket: None
Catalog No.: STOPPIN2
Price: $10.00
Shipping Weight: 0.10 pounds
 
 
Quantity:
 

Replacement stop pin for S-Press, fits current model presses (goes through front frame of press, through the ram, to provide ejection for internal punch on the down stroke and to secure the ejection pin in point form dies).

The length of the pin, measured from the tip to the point where it enters the knurled head, is 2.050  inches (anything in the 2.06 to 2.04  range is fine, however).   The shorter STOPPIN1 is about half that length, at 1.065 inches.  The pin diameters of both are 0.238 inches. 



The short pin can be used in the S-press, with slotted head ejection pins.   The long pin, however, will not work in the early presses such as the Series II, because the ram is not machined with a slot all the way through it with a support hole in the rear of the frame, as is the current press design.  Therefore the long pin would be sticking out of the front of the press about half its length, and the pointed end used to help align and guide the long pin would not fit into the notch in the early slotted head punch (used for point form dies and jacket maker dies only).  

The current ejection pins for the -S press have a hole all the way through the head, not a notch.  Also, the diameter of the punch head is larger to allow for this .238+ diameter hole, so it does not fit down into the smaller hole earlier press rams.  The older type M dies used a smaller diameter ejection punch head with a slot or notch in one side, about half way through the diameter.  The squared off end of the short punch fit into this notch to hold the pin.  The older -M punch will fit in the latest -S press, so you can continue to use early dies provided you also obtain and use the short stop pin with them.   A later -S type die and punch will not work in the earlier presses which were made for smaller diameter punch heads.   Basically, there is no drawback to upgrading to a later press, because it works with every sort of punch and die of the -M or -S versions, with or without a hole all the way through, provided you add a short stop pin (the long one comes with the press).

This STOPPIN2 model is sold for replacement purposes, not for retro-fitting older presses (that does not work since the press frame and ram are not machined to accept the longer pin).  You CAN have an older press, with a slot only in one side of the ram, upgraded to take the larger punch heads and long stop pin.   To do this, we get your press back at the die works, remove the ram, machine it with a larger bore for the punch heads and machine a slot all the way through both sides for the stop pin.  We also machine the frame to use a longer pin and provide support with a hole in the rear of the frame.  In most cases a new stop pin retainer bushing is installed in the front hole, and other improvements may be added if needed for your model (such as the handle retaining clip, or improved sync plate, if absent).   The upgrade package is listed under the press or press accessory sections on this web store.



Related Item(s)
Code Name Price Availability  
CSP-1 S-Press $949.00  
STOPPIN1 Short stop pin, Series II press $10.00  



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