StarReloaders.com Discussion Forum
Star Reloaders Discussion Forums => Star Reloaders => Topic started by: Rapidrob on January 06, 2017, 05:39:16 pm
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I have a CMP loader and am wondering if I can use a Star Powder slide with this machine?
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Greetings,
I measured my CPM powder bar and it is 3/4" wide by 1/2" deep. The Star bars are 5/8" wide.
You would be best advised to continue to use the interchangeable bushings in the original CPM machine.
They are easily made from 1/2" diameter brass bar stock.
Or, have Bruce Williams of Star Machine Works fabricate them for you.
Originally, I believe CPM used the Pacific, now Hornady, pistol measure bushings. They work fine; but, moving from one bushing to the next is a large weight change.
Cheers,
Dave
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Thank you for the reply. My machine came missing the powder slide assembly,just the bronze housing and powder drop tube. I made a slide from a nylon cutting board and drilled a hole to drop one type of powder at a known weight.
I would like to have a slide that could take the bushings being offered.
I was hoping that the Star slide would fit.
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Contact Bruce at Star Machine Works. Bruce can probably make the slide and bushings. An added bonus is that Bruce is an all around great guy and a good BE shooter.
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Greetings Rob,
Does your machine have the base and top plate with thumb screws?
Just missing the powder bar?
I can make a drawing for you to have it machined locally.
Perhaps a small photo of your powder dispensing mechanism.
Cheers,
Dave
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If Dave can provide a drawing and perhaps a picture of an original CPM powder slide, I'm sure I could help you out.
Bruce Williams
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I will do that. Thank you for the offers.
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I'm not a machinist nor do I play one on TV,but I try to makes things the hard way. I made the slide out of a Harbor Freight cutting board. The nylon is self lubricating and moves with little effort. I had to "guess" on the movement of the slide to locate the center of the powder drop hole. I was close to being centered,but no cigar. I added a spring loaded screw to always allow the slide to stay riding tightly on the slide cam bar. As I stated,it works very well but is set for H110 for .357 Magnum.
Here is the powder slide unit
(http://i31.photobucket.com/albums/c374/Rapidrob/CMPA_zpsqgkavjjm.jpg)
Here is the length if the bronze slide unit
(http://i31.photobucket.com/albums/c374/Rapidrob/CMPB_zpsfmqyisgf.jpg)
Here is the width of the slide unit channel,it is in fact .75" (3/4")
(http://i31.photobucket.com/albums/c374/Rapidrob/CMPC_zpsjza413st.jpg)
Here is the length of the slide I MADE. I do not know if this is factory correct, it is what I came up with that works.
(http://i31.photobucket.com/albums/c374/Rapidrob/CMPD_zpsvlryrx1n.jpg)
Here is the center of the drop hole,it is close but it is not centered perfectly as tghe factory one would be.
(http://i31.photobucket.com/albums/c374/Rapidrob/CMPE_zpsuv2mvyl3.jpg)
Here is the thickness of the slide bar, it is close to being right but is a few thousands "thin" allowing powder grains to collect on the top of the slide bar.
(http://i31.photobucket.com/albums/c374/Rapidrob/CMPF_zpsozcpuyrz.jpg)
Here is the cam slot. I had to guess to make this work. No idea if I'm even close to factory specs.
(http://i31.photobucket.com/albums/c374/Rapidrob/CMPG_zpslrtgdwnu.jpg)
Here is the width of the cam at full rest (up)
(http://i31.photobucket.com/albums/c374/Rapidrob/CMPH_zpspa857mys.jpg)
Here is the thickness of the cam arm
(http://i31.photobucket.com/albums/c374/Rapidrob/CMPI_zpscoiztyns.jpg)
I hope these images help. I can take more if needed and a proper description of the measurements needed are given.
Thanks again for your help.
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Greetings,
I will create an engineering drawing and forward it to Bruce Williams.
Give me a day or two.
Cheers,
Dave
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Thank you Sir!
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for comparison -
Star vs
CPM bushing vs
CPM adjustable
Bruce and Dave if it helps I can measure or provide pics or ship you the CPM's to copy
thanks,
fred
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Thanks Fred, Dave is doing the drawing and that will have all of the necessary measurements, but I appreciate the picture, it always helps to have a frame of reference.
Is the adjustable slide original CPM?
Bruce
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Greetings,
Reverse Engineered sketch of my CPM Powder Bar.
Cheers,
Dave
PS: Got to wondering as to which way the radius part faces. Up or down? The shaker rollers are offset to one side, so there must be a correct way.
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Thanks Dave,
The few pictures I have seen show the radius on the bottom, but I don't know if that is correct.
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Bruce,
Sorry I don't know if the adjustable bar is original CPM, it's old.
It's 3/4"x3/4" brass, longer, without radius, takes a spring, and the hole center 'drop zone' is a little different.
The rollers on the 3 bars as pictured line up closest above grade with the radius up.
Fred
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Dave
Very well done professional looking drawing!
Kenn
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I also own a CPM.. don't ever recall seeing an adjustable powder slide.
yes the originals used Pacific pistol powder bushings.
Bruce has made me a few bushings and they were great.
here is the pacific chart for the bushings
https://www.hornady.com/assets/files/powder-charge-bushings.pdf
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Thank you for posting the drawing. I'm hoping that one can be made for me.
I got a reply from Starmachines.com and the drawing sent to him was badly corrupted. I'm hoping he did get a copy that could be read.
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I'm not sure who starmachines.com is, but I got the file, I have ordered the materials, and will make it as soon as I get a chance.
Bruce Williams
Star Machine Works
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Thats great news. I was concerned due to the scrambled drawing I was sent.