Ssanders224
Ssanders224
5 posts
Joined March 2014

Rough Indexing SDB Shellplate

Hopefully someone can assist with this...

So, I've been loading on a SDB for a while now, and not to toot my own horn, but I know the press like the back of my hand. I bought my first one used, and stripped it part for part , bolt for bolt, cleaned everything, replaced worn out parts, and upgraded everything to the latest version. I know the press and how it operates intimately.

I can usually diagnose and correct any problem that arises.

However, I just bought another used SDB, and went through my normal stripping, cleaning , upgrading routine, and everything turned out perfect... Except, the shell plate indexes very rough. The indexing paw does not cam smoothly. Also, at the end of the rotation, the paw falls beneath the shellplate and causes a small "snap".

I have tried 3 different (new) indexing paws, different shell plates, different cam bolts, you name it, I've tried it, but cannot correct the issue. It is almost as if the dimensions between the index paw and bolt that cams it are incorrect, causing the cam motion the be herky jerky.

If anyone has any thoughts, or has encountered this before, please let me know.

The first video is the new press that indexes rough.
Second video is my other SDB that operates how it should.

http://youtu.be/orUu7x52Up0

http://youtu.be/B_p1xfbXlFg

Thanks in advance for any help!

I have also posted the issue over at Brian Enos forum:

http://www.brianenos.com/forums/index.php?showtopic=192760&hl=

dillon
Administrator
dillon
3,075 posts
Joined July 2007

RE: Rough Indexing SDB Shellplate

First, be sure the bottom angled surface of the index lever is well-greased.

If the rough indexing continues after greasing, then use a thin washer to shim the index lever outward. It is hard to tell from the videos, but it could be the new indexer is hitting the hole in the shellplate too far inward. A .010" thick spring washer should be fine.

If you don't have one, email us and we will mail one to you. Please be sure to include your address.

 

Ssanders224
Ssanders224
5 posts
Joined March 2014

RE: Rough Indexing SDB Shellplate

Thanks for the reply!

 

The angled cam surface of the indexing arm is well greased, as is the bolt that it rides on.  The factory spring washer is also in place.

 

I considered the possibility of the paw hitting to far forward in the hole yesterday, and added a thin flat washer under the spring washer.  It noticeably moved the contact point further back in the shellplate hole, but the jerky indexing remained the same.

 

Also, the paw still snapped under the shellplate at the end of rotation.  It is almost as if the indexing lever is trying to "over index" and the result is the paw falling below the shellplate.

Ssanders224
Ssanders224
5 posts
Joined March 2014

RE: Rough Indexing SDB Shellplate

Anyone else have a thought on this?

I'm out of ideas, and I cannot use the press as is.

g26westgate
g26westgate
21 posts
Joined February 2014

RE: Rough Indexing SDB Shellplate

Could it be that the grease is not enough?
rsgates
rsgates
1 post
Joined February 2011

RE: Rough Indexing SDB Shellplate

I had this problem last year. My solution was never obvious to me, but I cleaned it all again, using some compressed air too, re-greased the pawl and the index bolt it rides on, plus the wave guides and every bearing surface. I also fiddled with the primer assembly and made sure it was adjusted per manual (my SDB is OLD and well used). The problem mostly is gone, but operates somewhere between your two videos.

I developed the habit of putting my index finger on the charged case top during the index so if it does "snap" the powder won't spill.

If you do figure it out I'm "all ears". Thanks for posting the great videos!
DavidWagner
DavidWagner
1 post
Joined June 2011

RE: Rough Indexing SDB Shellplate

I just fixed my SDB - it had the same problem after changing out the indexing arm - I had the spring in backwards and indexing started to grab in the middle of the index. The spring has to be put in so that it retracts the indexer rather than assists in indexing.