|
Post by Drummond Island Rocks on Oct 23, 2012 15:16:38 GMT -5
Ok, I got a lortone qt12 on the way and hopefully that will speed up my rough 60/90 stage a little. My question is do I really need to use 20 tbs of 60/90 like the lortone instructions say? seems like a lot of grit since I only use 3 tbs in my 3 lb barrels.
thanks Chuck
|
|
keystonecops
freely admits to licking rocks
Member since October 2010
Posts: 957
|
Post by keystonecops on Oct 23, 2012 15:23:58 GMT -5
Chuck, on my 12lbr, I only use 61/2. Seems to wok okay for me. Guess its all xperiment. I use a notebook to keep track o what I put in. Later Clyde
|
|
|
Post by rockpickerforever on Oct 23, 2012 15:34:10 GMT -5
Chuck, Ed (mostly) sent me an old Scott Murray tumbler, and I ended up having to replace the liner. The liner I bought from the Rock Shed is sold as a replacement for a Thumlers 15# hex, I think it's a model B. As per the Thumler instructions for that model, it uses 1# of the coarse grit with a full load. I only ran it twice (roughing only), but that amount seems to work fine. Jean
So how many tablespoons are in a pound? Jean
|
|
|
Post by geoff on Oct 23, 2012 16:21:49 GMT -5
I use 1.5 cups of 46/70 in mine. So... 24 tablespoons.
|
|
jspencer
freely admits to licking rocks
Member since March 2011
Posts: 929
|
Post by jspencer on Oct 23, 2012 21:39:59 GMT -5
A general rule I go by is one tablespoon grit per lb. of rough in a rotary
|
|
quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,352
|
Post by quartz on Oct 23, 2012 21:49:47 GMT -5
Sixteen tbs. per cup, and for all intent, one cup of grit weighs one pound. We use one cup of grit per gallon of barrel capacity. A QT12 is one gallon capacity.
|
|
herchenx
Cave Dweller
Member since January 2012
Posts: 3,360
|
Post by herchenx on Oct 23, 2012 21:52:20 GMT -5
I do just like Geoff, 1.5C 60/90, 2C water, 10 days to recharge.
|
|
|
Post by Drummond Island Rocks on Oct 23, 2012 21:56:59 GMT -5
Thanks, good to hear all the opinions as always. That gives me a great starting point.
Chuck
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,564
|
Post by jamesp on Oct 27, 2012 13:39:50 GMT -5
Me too- 1 and 1/2 cups coarse grit for 12 pounds.But must recharge when worn out.Sometimes just 1 cup for the heck of it.1 and 1/2 cups for step 1 and 2.
|
|
|
Post by Toad on Oct 27, 2012 14:40:15 GMT -5
U use a cup and a quarter on my 12-lb barrels. Works great, though I never tried using less...
|
|
LarryS
freely admits to licking rocks
SoCal desert rats
Member since August 2010
Posts: 781
|
Post by LarryS on Oct 27, 2012 18:02:23 GMT -5
I only tumble hard jasp-ag in my 12# Lortone and use 20 tbl spoons of 60 grit. Definately shortens the 1st step over using 60/90. Also throw in a few over sized 2" & 3" rocks in the batch which they say you're not suppose to. Oh yeah? Works for me.
|
|
Mattatya
spending too much on rocks
Member since June 2012
Posts: 452
|
Post by Mattatya on Oct 30, 2012 16:17:58 GMT -5
This is a great topic. I have been tumbling agates in a 12# for months with 60/90 going through and pulling out well shaped agates and recharging the barrel and adding more agate. I didn't realize using a couser grit would be ok to use on the larger barrels.
Last week I added 60/70 to the agates and in doing so I hope to pull the majority of them out and have enough set aside to fill a 12# barrel and move on to 120/220. I started out tumbling 2 12# barrels of agate.
Sent from my SPH-D710 using proboards
|
|
LarryS
freely admits to licking rocks
SoCal desert rats
Member since August 2010
Posts: 781
|
Post by LarryS on Oct 30, 2012 19:18:34 GMT -5
I know some guys start out using 40 grit with good results. Speeds up the 1st stage on hard material for sure. I'm content using 60 for now. Eventually it wears down to a finer grit anyway.
|
|
Mattatya
spending too much on rocks
Member since June 2012
Posts: 452
|
Post by Mattatya on Oct 31, 2012 18:31:10 GMT -5
Hi LarryS, I don't mean to hijack the op topic but do you go from 60 grit straight onto 120/220? Or do you need an additional middle grit?
Sent from my SPH-D710 using proboards
|
|
|
Post by tntmom on Oct 31, 2012 18:49:31 GMT -5
I have always used 1.25 cups in my 12lb'er. Last March or so I started using 1 TB per lb and got the same results. Granted, I mostly tumble ob and when I do hard stones I still up it to 1.25 cups and sometimes use 40/70. With any stones softer than 7 I think you could save a lot of money on grit just doing 1TB per lb. I haven't tried 1TB per lb on harder stones yet.... I guess I'm just stuck in my ways Matt...... I have always went straight to 120/220 from the rough in a rotary. If doing the second stage in a vibe then I go to "graded" 220. ****Also when I recharge each week, I use 1/2 of the amount of grit that I started with. If the grit hasn't broken down most of the way then either run it longer or check it really good. I've had grit cement rocks onto the bottom of the barrel and I didn't know until I did a full barrel rinse.
|
|
Mattatya
spending too much on rocks
Member since June 2012
Posts: 452
|
Post by Mattatya on Oct 31, 2012 19:37:20 GMT -5
Cool, Thank tntmom, I have had that happen to with cementing on the bottom of the tumbler from adding to much while recharging. I would rather tumble longer with small recharges then dump to much and waste. Especially on the 12 pound tumblers. I love when websites sell tumble grit quantity and say "this amount will tumble this many batches." Not always the case when you have some really hard agates going for a couple months lol.
|
|
LarryS
freely admits to licking rocks
SoCal desert rats
Member since August 2010
Posts: 781
|
Post by LarryS on Oct 31, 2012 19:49:21 GMT -5
mattatya
Yep, I go from 60 straight to 220. All I tumble is hard jasp-ag. And I completely rinse & inspect during recharging because many rocks advance to the next stage and keep adding rough to the 12#er.
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Nov 3, 2012 15:49:09 GMT -5
|
|
Mattatya
spending too much on rocks
Member since June 2012
Posts: 452
|
Post by Mattatya on Nov 3, 2012 22:12:53 GMT -5
Cool, i'm pulling my agate 12# tomorrow. Since I used the 60/70 on this charge, i'm hoping to be able to pull enough out to move onto a 12# 120/220. Thanks for the advice and letting me hijack tge thread Sent from my SPH-D710 using proboards
|
|