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Jacket Maker, Auto Strip Feed
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Quantity in Basket:
None
Catalog No.: JMK-2-H
Price: $5,950.00
Shipping Weight: 50.00 pounds
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JMK-2-H auto-feed jacket making set uses the CSU-1
Corbin Strip Uncoiler and a CHP-1 Hydro Press, to combine
the steps of automatically feeding copper strip, applying
lubricant, blanking a disk from the strip, and turning the
disk into a first-stage cup.
The cup is fed into a container, and is later redrawn from
two to four times with a final trim stage. These stages are
the same as with the JMK-1-H manual feed system (same dies
and punches). The main difference is in the combination of
feeding, lube, blanking and cupping, so that the copper
strip is turned into first stage cups without user interaction.
Important:
The JMK-2-H is designed for making handgun and rifle jackets
that can be drawn from a specific strip width per set, either
.030 or .050 inch thickness, width of 5/8, 1.0 or 1.25 inches.
Strip thicker than 0.050 inches will not decoil and feed
automatically, and cannot be used with the JMK-2-H. If you
plan to make a jacket requiring strip heavier than .050-inch
thickness, order the JMK-1-H die set instead.
Examples of jackets that would require 1.4 x .093 strip:
- 50 BMG jackets and similar sizes.
- Jackets with wall thickness over 0.035 inches and
length of an inch.
- Jackets with more than 0.0565 cubic inches volume.
It is possible to feed straight lengths of .093-thick strip
by hand, helping the feeder/lubricator mechanism, by slowing
down the press with the hydraulic speed control to allow
time to push the thick strip by hand, but it is more
economical to use the JMK-1-H with strip too heavy to uncoil
automatically. Bear in mind that strip thicker than .050
inches is almost like a solid bar rather than flexible strip.
It requires more force to remove from the coils than is
practical for the automatic system, and there is no
economical work-around.
Examples of calibers that are easily drawn with the auto
strip feed jacket maker include:
- .17, .20, .22 using 5/8-wide x .030 strip
- All handgun calibers using .030 x 1 inch strip
- .257, .264, .277, .284 and .308 with .030 x 1 or .030 x 1.25 strip.
- Calibers larger than .308 but under .408 with .030 x 1.25 or .050 x 1.25 strip.
- Calibers over .408 but meeting volume limit using .050 x 1.25 inch strip.
This is a very rough guide, because the wall thickness
and length also figure into the total volume needed for a
jacket, and the strip width and thickness determines the
maximum possible volume of disk that can be punched to
draw the jacket. However, once you have the jacket maker
set for the largest, longest and thickest (most volume)
jacket, you can re-draw those jackets to make smaller calibers
with the same or thinner walls, and greater length. A
JRD-2-H draw die and an ET-2-H trim die per additional
caliber multiplies the number of jackets you can make.
The JMK-2-H requires a dedicated CHP-1 press, and will only work
effectively with a strip uncoiler such as the CSU-1 (although
sections of strip can be hand fed, this defeats the purpose of
most of the automatic feeding head components.
The set includes components to convert the head assembly
of a CHP-1 for auto feed. Instructions are included for
removal of the standard head assembly and replacement with
the special automatic feed head unit. Generally, it is better
to own two Hydro Presses, one purchased with the JMK-2-H
and factory assembled with the automatic head components, and
a second one set up for redrawing the cups.
However, one can remove and install the head assemblies
in about an hour. After gaining some experience with this,
the change-over time can be reduced to perhaps 30-45 minutes.
It is not a recommended option, but it is possible. If one
cannot afford to dedicate a press to the blanking/cupping
operation and use another press to finish drawing and
trimming, then it might be better to get the JMK-1-H which
can be used with one press for all operations.
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Price
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ET-2KIT
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