Tuning up a Rock BR rest. - Page 3 - RimfireCentral.com Forums

Go Back   RimfireCentral.com Forums > >

Notices

Join Team RFC to remove these ads.
Reply
 
Thread Tools Display Modes
  #31  
Old 09-18-2013, 03:29 PM
BHPete

Join Date: 
Aug 2012
Location: 
Eastern Iowa
Posts: 
171
TPC Rating: 
100% (4)


Log in to see fewer ads
My thanks to Bill40718 for posting these mods. It's been a fun project.

I did all of the mods listed here and additionally I made shorter thumb screws for the Ram Lock and the Coarse Adjustment. I saw no reason for them being as long as they are and I found the Ram Lock screw to be in the way of rotating the Mariner's Wheel.



Extra parts...



I haven't used the rest a whole lot since the mods but am hopeful it'll be a bit better to use. I can say that the Delrin thrust bearing doesn't seem to be better than the roller bearing that came with the rest. It's not worse - I just can't yet say it's better.

Using the 8mm roller bearings from McMaster/Carr on the windage screw does seem to be a nice improvement.

Now I need to find another little project...
Reply With Quote
  #32  
Old 09-18-2013, 08:12 PM
Bill40718's Avatar
Bill40718
US Army Veteran NRA Member - Click Here To Join!

Join Date: 
Oct 2012
Location: 
Cave Creek, Arizona
Posts: 
1,317
TPC Rating: 
100% (25)
BHPete,

You are very welcome!

Your feet look great!
But I have to ask. Did you countersink the top of the holes? If not, your adjustment legs will really get galled. Please, please do not ask me how I know this!

I like the shorter lock screws as well. I was shooting today and noticed exactly what you corrected. The one lock screw does interfere with the mariners wheel.

I used 2 Delrin washers, that way they slide on each other. With only one the benefit is minimal.

Great job and another excellent contribution to the thread.

Thank you for your participation.
__________________
The older I get, the more grateful I am.......
William (Bill) Powell
Cave Creek, Az.
Reply With Quote
  #33  
Old 09-18-2013, 08:34 PM
BHPete

Join Date: 
Aug 2012
Location: 
Eastern Iowa
Posts: 
171
TPC Rating: 
100% (4)
Well, without your posting I wouldn't have made these mods!

Yes, the feet have a hole - my center drill (60*, I believe) matches the points on the rest's legs nicely. They turn easily.

After I had packed away my tools I got to thinking two washers/bearings would probably be better for just the reason you said. As thick as mine are I'd be better off cutting some new, thinner ones. Maybe tomorrow I'll give that a go.
Reply With Quote
Sponsored Links
Advertisement
 
  #34  
Old 09-20-2013, 02:59 PM
mr rich

Join Date: 
Sep 2013
Posts: 
10
TPC Rating: 
0% (0)
Just changed out the bearings on the windage adjustment. I had ordered the parts from Motion Industries ( Koyo roller #nta-512 $1.92 ea & Koyo tra-512 thrust washers .71 ea) They were in stock items, so was able to order and pickup at the same time.
I have 6 extra thrust washers, if you need some e- mail me your address and I will send them to you.
You can look up their locations at WWW. motionindustries. com
rich
Reply With Quote
  #35  
Old 09-20-2013, 06:58 PM
mr rich

Join Date: 
Sep 2013
Posts: 
10
TPC Rating: 
0% (0)
Sorry, I asked that you send a e-mail if you needed the washers and then
forgot to add my e-mail address.
[email protected]
rich
Reply With Quote
  #36  
Old 09-20-2013, 10:09 PM
BHPete

Join Date: 
Aug 2012
Location: 
Eastern Iowa
Posts: 
171
TPC Rating: 
100% (4)
I am good on bearings. I'd suggest that if anyone else is thinking of modding their rest to add the windage bearings. You can really take up the backlash and make that screw turn nicely.
Reply With Quote
  #37  
Old 09-27-2013, 08:21 PM
Bill40718's Avatar
Bill40718
US Army Veteran NRA Member - Click Here To Join!

Join Date: 
Oct 2012
Location: 
Cave Creek, Arizona
Posts: 
1,317
TPC Rating: 
100% (25)
I completed an additional modification to my Rock BR yesterday,

I wanted the heaviest rest I could have starting with the Rock BR. What I did was add about 8 or 10 pound of lead to the rest for additional stability.

First I drilled a short hole (1/2" or so) in the underside of the rest as shown in the following photo.



Then I drilled a hole through the side of the leg into the hollow in the leg as in the following photo.



Then I tapped the hole in the side of the leg to allow threading in a machine screw.
I screwed in the screw and tightened it. This is to insure the lead stays in place.



Finally I poured lead into the bottom of each leg to completely fill the hollow. No photo of the pour,

A coat of paint and we are done.

A couple hours work is all it took. It was worth it to me.
YMMV!!
__________________
The older I get, the more grateful I am.......
William (Bill) Powell
Cave Creek, Az.

Last edited by Bill40718; 09-27-2013 at 08:27 PM. Reason: Fixing my spelling.
Reply With Quote
  #38  
Old 09-28-2013, 12:19 PM
mr rich

Join Date: 
Sep 2013
Posts: 
10
TPC Rating: 
0% (0)
bhpete, like your idea on the shorter screws, are you going to sell same?
rich
Reply With Quote
  #39  
Old 09-28-2013, 06:55 PM
BHPete

Join Date: 
Aug 2012
Location: 
Eastern Iowa
Posts: 
171
TPC Rating: 
100% (4)
Quote:
Originally Posted by mr rich View Post
bhpete, like your idea on the shorter screws, are you going to sell same?
rich
No, I'm just a hack as a machinist and my lathe is just one of those hobby mini-lathes that's no good for production work.

The screw under the mariner's wheel is a little tricky as the diameter has to be smaller than what comes with the rest to clear the wheel. The knob on mine is, I think, 1" and it seems to work OK. My point is that you can't simply shorten the screw that comes with the rest or it will interfere with the height adjustment.

McMaster/Carr has thumb screws If I remember right the thread is metric and an M8 x 1.25. You might find something that'll work on the linked page.

Edit: Here is a more comprehensive page of thumb screws: http://www.mcmaster.com/#thumb-screws/=opjgig

Last edited by BHPete; 09-28-2013 at 07:20 PM.
Reply With Quote
  #40  
Old 09-28-2013, 07:32 PM
Oldgringo's Avatar
Oldgringo
NRA Member - Click Here To Join!

Join Date: 
Dec 2009
Location: 
Pineywoods of east Texas
Posts: 
2,478
TPC Rating: 
100% (4)
Very interesting AND something to do this winter. Thanks y'all.
Reply With Quote
  #41  
Old 09-29-2013, 12:36 PM
BHPete

Join Date: 
Aug 2012
Location: 
Eastern Iowa
Posts: 
171
TPC Rating: 
100% (4)
For me these rests are a pain to store and get to the range. They're heavy and awkward. So, while this isn't an upgrade to the rest itself it is for me an upgrade to the whole BR package.





Reply With Quote
  #42  
Old 10-14-2013, 01:44 PM
jcrowleyiv's Avatar
jcrowleyiv
NRA Member - Click Here To Join! UotM

Join Date: 
May 2012
Location: 
20 Clicks NW of Dallas, Texas
Posts: 
2,703
TPC Rating: 
100% (83)
Kudos to you Bill, for putting this together - it is a great reference!!!!

It would be a perfect Sticky........Hint, hint

John
__________________
Yesterday is history,
Tomorrow is mystery.
Today is a gift from God -
That is why it is called "the present".
Reply With Quote
  #43  
Old 10-14-2013, 10:11 PM
Bill40718's Avatar
Bill40718
US Army Veteran NRA Member - Click Here To Join!

Join Date: 
Oct 2012
Location: 
Cave Creek, Arizona
Posts: 
1,317
TPC Rating: 
100% (25)
Thanks for the Kudo's John, stickies get considered by moderators.

BHPete,
Your rest box looks great and has been added to my schedule of projects. Have you considered wheels and a handle of some sort? I'll be waiting for your creativity to respond with a modification and then some photos.
__________________
The older I get, the more grateful I am.......
William (Bill) Powell
Cave Creek, Az.
Reply With Quote
  #44  
Old 10-15-2013, 10:56 AM
BHPete

Join Date: 
Aug 2012
Location: 
Eastern Iowa
Posts: 
171
TPC Rating: 
100% (4)
I do like the storage box. It seems to have acquired other stuff for storage, too - like targets.

No plans for wheels or different handles. It is darned heavy but I don't ever have to carry it too far and it fits nicely on the shelf where I keep it. One thing you can't see in the pictures are the three runners running longitudinally on the bottom. It slides a little easier that way and keeps the bottom raised 3/4" off what it's sitting on.

That's a good idea on the screw problem, MKnarr. McMaster sells a nylon tipped set screw that should also work as you describe.

This thread has lots of great improvement ideas for this rest.

Last edited by BHPete; 10-15-2013 at 11:00 AM. Reason: Added better link.
Reply With Quote
  #45  
Old 11-02-2013, 01:45 PM
gas_gunner's Avatar
gas_gunner
NRA Member - Click Here To Join!

Join Date: 
Jan 2008
Location: 
Northeast Ohio
Posts: 
265
TPC Rating: 
100% (5)
I like the storage box. It is something I want to make for mine. I thought of that a while ago but never made one.

Danny
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off




All times are GMT -5. The time now is 07:02 PM.

Privacy Policy

DMCA Notice

Powered by vBulletin
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimisation provided by DragonByte SEO (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright 2000-2018 RimfireCentral.com
x