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Quick-Change Punch Holder, -S type
 
Quick-Change Punch Holder, -S type Quantity in Basket: None
Catalog No.: FPH-QC-S
Price: $129.00
Shipping Weight: 1.00 pounds
 
 
Quantity:
 
The Quick Change Punch Holder, type -S, fits the CSP-1 S-press, the CSP-1H HydroMite, and earlier 7/8-14 threaded head Corbin swage presses made as far back as the founding of the company in the 1970's.

The purpose of this accessory is to replace the standard FPH-1-S punch holder, for the top or external punch, with one which allows the punch to be slipped in sideways and quickly slipped out again, between strokes. This provides room to install longer components than would normally fit in the space between the punch and die, trading a slight inconvenience in time per operation for an extended length beyond what is possible with the standard tooling.

For instance, an extremely long and heavy ultra low drag (ULD) bullet starts as a core seated into a long jacket, which might be a little too long to easily fit into the space between the open die mouth and the external punch. If you use the FPH-QC-S punch holder, the top punch can slip out sideways, the seated core and jacket dropped easily into the die mouth, and then the punch slipped back into the T-slot again. After forming the bullet, the ogive on the open end of the cylinder will allow the bullet to tip sideways at an angle as it is being ejected, so you probably will not need to remove the punch at that point.

There is a knob on top of the quick-change punch holder, which sets the amount of clearance for the punch head to slide in and out of the slot. You want to set the slot height by turning this knob until the punch fits easily but is still held well enough not to wobble or fall out, or to move up and down significantly. The knob lets you adjust for slight tolerance differences in punch heads, to give a perfect sliding fit.

Large calibers usually have a top or external punch with a pre-fitted hex nut, and a removable punch head. Caliber from about .375 down do not. They are small enough on the end opposite the head so the standard hex nut on a normal floating punch holder will fit over the punch easily. Calibers larger than the hole in the hex punch, or around 3/8-inch, of course won't slip through the hole on either end unless the head is removable to allow it.

For large calibers, over .375, the hex bushing must be removed from the punch. If the system is ordered together and it is clear that the large caliber punch will be used with a QC punch holder, we will leave off the hex bushing when assembling the punch. If it is not clear that is your intended use, we will ship the punch with the hex bushing installed. You would then need to use a key wrench to unscrew the cap screw in the punch head, remove the head, slip the hex bushing off, and then re-install the head again, to use it with the QC punch holder.

The heads of -S type punches larger than .375 are held by a Torx T-27 socket cap screw. You will need to use the T-27 angle key or wrench to fit this screw socket. A Torx size 27 key is sent with the QC punch holder for this reason. There is no such screw in the punch holder itself.

To hold the external punches without damage for removing the head, use a wood block, a strip of thick copper or aluminum, or some other firm but pliable material to pad the jaws of a vise or vise-grip pliers. Grasp the shank of the punch as close to the hex bushing as possible, to avoid applying pressure to the end of the punch where it seals pressure in the die, especially if it has a cavity machined into the end (nose punch). Holding the punch at the end is likely to crush the walls around the cavity and ruin the punch!

Please note that holding the head of the punch while attempting to remove the head does not work. The screw threads into the main body of the punch and merely passes through a hole in the head. You would just spin the punch body without loosening the screw.

Under no circumstances grasp the punch anywhere with a pliers or steel vise jaws without sufficient padding to prevent galling the surface! The punches are hardened but also very high precision. Mashing them against the high points on a set of vise jaws can easily exceed the force needed to damage them beyond repair. Two small pieces of wood with a hole bored through the junction just under the punch body diameter is sufficient padding.




EXPORT RESTRICTIONS: We can ONLY ship to USA locations, Canada, or the UK at this time!
Note: 3.5% Bank Card Processing Fee added by Card Processing Service. VCC Number is required for security: send by email with order number.
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