Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Which press?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Trickymissfit" data-source="post: 513317" data-attributes="member: 25383"><p>I rebuilt a couple presses for my brother and the guy I used to work for, and that was the first time I ever thought about it to be honest with you. One press was a Pacific (their biggest cast iron framed press) and the other was a Rockchucker. At my brother's I had the choice of four different presses (one was a Rockchucker by the way). After breaking both presses down I check the bores with a dial bore gauge, and saw the tightest place to be in the center of the bore length, and the I.D. grew at each end. Both rams had some taper, but not a large amount (seems like five or six thousandths). I ran the rams accross a Studer grinder for less than .0003" taper in the full length (note: I made a new ram for my boss as well, as something just didn't look right). I noticed that when I ground the centers on both rams that they didn't clean up evenly; yet were pretty much dead center (very close). I then clamped them in a hand scraped vee block and checked the end where the case holder fits. Both were out over .003", but I expected them to be out a thousandth or so. Cleaned both rams up square on a jig grinder (took about a half hour for each one). Seems like I made over sized step pins out of A2, and new links out of 4150. I do know my brothers uses self aligning bearings in his, and suspect that Chuckies does as well. The other ram (which Chuck still has) is made from 4150 pretreat steel, and gas nitrided for a .035" case. I did regrind the new ram after nitride about .004"</p><p> </p><p>The frames were done with Ampco 18 bronze bushings(2). Ram to bushing fit was about .0015". I did try a similar setup with hard steel bushings, and didn't really like them. Both rams were reground to fit the bores (about .003"). I made an indicator adapter to check the press for squareness in travel, and we were all happy. After that I set the frames back up and drilled and tapped a new plug for the die (red loctited in place).</p><p> </p><p>My brother and Chuck shoot a lot of long strait walled cases (like 50-110), and they said they never saw better cases ever. I did have another ram design that I think would fix about 75% of the ram torquing, but just never got the time to build one. It used heavy duty roller bearings in a toggle affair much like Bullard used for their turret lockup. Actual travel was an issue that still had to be resolved with the linkage. I suspect it would have been twice as powerfull at the minimum with an absolute dead stop at the max travel.</p><p>love to experiment</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 513317, member: 25383"] I rebuilt a couple presses for my brother and the guy I used to work for, and that was the first time I ever thought about it to be honest with you. One press was a Pacific (their biggest cast iron framed press) and the other was a Rockchucker. At my brother's I had the choice of four different presses (one was a Rockchucker by the way). After breaking both presses down I check the bores with a dial bore gauge, and saw the tightest place to be in the center of the bore length, and the I.D. grew at each end. Both rams had some taper, but not a large amount (seems like five or six thousandths). I ran the rams accross a Studer grinder for less than .0003" taper in the full length (note: I made a new ram for my boss as well, as something just didn't look right). I noticed that when I ground the centers on both rams that they didn't clean up evenly; yet were pretty much dead center (very close). I then clamped them in a hand scraped vee block and checked the end where the case holder fits. Both were out over .003", but I expected them to be out a thousandth or so. Cleaned both rams up square on a jig grinder (took about a half hour for each one). Seems like I made over sized step pins out of A2, and new links out of 4150. I do know my brothers uses self aligning bearings in his, and suspect that Chuckies does as well. The other ram (which Chuck still has) is made from 4150 pretreat steel, and gas nitrided for a .035" case. I did regrind the new ram after nitride about .004" The frames were done with Ampco 18 bronze bushings(2). Ram to bushing fit was about .0015". I did try a similar setup with hard steel bushings, and didn't really like them. Both rams were reground to fit the bores (about .003"). I made an indicator adapter to check the press for squareness in travel, and we were all happy. After that I set the frames back up and drilled and tapped a new plug for the die (red loctited in place). My brother and Chuck shoot a lot of long strait walled cases (like 50-110), and they said they never saw better cases ever. I did have another ram design that I think would fix about 75% of the ram torquing, but just never got the time to build one. It used heavy duty roller bearings in a toggle affair much like Bullard used for their turret lockup. Actual travel was an issue that still had to be resolved with the linkage. I suspect it would have been twice as powerfull at the minimum with an absolute dead stop at the max travel. love to experiment gary [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Reloading
Which press?
Top