spiritstone
Cave Dweller
Member since August 2014
Posts: 2,061
|
Post by spiritstone on Oct 1, 2014 14:09:24 GMT -5
MMMM Canadian back bacon! Lard! Its worth a shot to try, hell of an idea. Just keep the heat down or make some eggs and toast. lol The huge flat lap is a fantastic idea.
|
|
Deleted
Deleted Member
Member since January 1970
Posts: 0
|
Post by Deleted on Oct 1, 2014 16:46:05 GMT -5
a big flat lap like that could make nice coral book ends.
|
|
quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,341
|
Post by quartz on Oct 1, 2014 23:20:46 GMT -5
There used to be a rock shop at Rufus, OR. The owner had a 9 foot lap out front, and many examples of its use inside. The lap table was made out of a bucking saw from a sawmill.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Oct 2, 2014 3:39:00 GMT -5
There used to be a rock shop at Rufus, OR. The owner had a 9 foot lap out front, and many examples of its use inside. The lap table was made out of a bucking saw from a sawmill. 9 feet ! serious. I kinda copied some from this lap. This is Sticks-n-Stones in Aloha Oregon. but these are a far cry from 9 feet. but doable for back yard welder. they have several of these lappers pictured on their website. Notice the offset rotation of the top section to the lap plate to mix the grind pattern. I think Larry could build one of these blindfolded. Notice double reductions top and bottom.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Oct 2, 2014 4:01:08 GMT -5
MMMM Canadian back bacon! Lard! Its worth a shot to try, hell of an idea. Just keep the heat down or make some eggs and toast. lol The huge flat lap is a fantastic idea. The grit salesman sees it all spirit. Sells tons of grit to all kinds of hi dollar operations. Military one of his biggest customers. It interests me that a natural organic compound would be used for lubricant. I used to use aerosol motorcycle chain lubricant made with whale sperm 30 years ago. I am sure it is not made anymore as the ban on whaling has come about. Sometimes it is hard to out do mother nature. The military saved a lot of money using cheap SiC on their laps when they found that the lard would keep the powdered SiC attached to the lapping wheel at higher speeds instead of washing it off like water and petroleum based oils would. Lard probably is a complex chemical, difficult to copy in a lab. But cheap and available.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Oct 2, 2014 4:10:37 GMT -5
a big flat lap like that could make nice coral book ends. the Sticks-n-Stones lap were a temptation Scott. I about had all the materials laying around to build it. Except the lap plate was the big ticket item that was puzzling.
|
|
quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,341
|
Post by quartz on Oct 2, 2014 11:26:27 GMT -5
I built a 20" rotary lap, haven't had time to perfect it, but I did find out a rock running in a consistent direction will wear a pattern. I see that as a disadvantage w/Sticks & Stones machine. Best to figure a way to rotate the rock too, or just run it by hand. I looked into flat cast iron manhole covers for a table, almost had two from up at the mill, but they decided to use them {after sitting for years, and I mentioned maybe getting them}. They had one hole about an inch in dia., easily plugged. Give it a thought, and watch your boneyards.
|
|
spiritstone
Cave Dweller
Member since August 2014
Posts: 2,061
|
Post by spiritstone on Oct 2, 2014 14:17:18 GMT -5
MMMM Canadian back bacon! Lard! Its worth a shot to try, hell of an idea. Just keep the heat down or make some eggs and toast. lol The huge flat lap is a fantastic idea. The grit salesman sees it all spirit. Sells tons of grit to all kinds of hi dollar operations. Military one of his biggest customers. It interests me that a natural organic compound would be used for lubricant. I used to use aerosol motorcycle chain lubricant made with whale sperm 30 years ago. I am sure it is not made anymore as the ban on whaling has come about. Sometimes it is hard to out do mother nature. The military saved a lot of money using cheap SiC on their laps when they found that the lard would keep the powdered SiC attached to the lapping wheel at higher speeds instead of washing it off like water and petroleum based oils would. Lard probably is a complex chemical, difficult to copy in a lab. But cheap and available. This came to me one day after running out of dop wax and it may work also. Havent tried it but it was a thought. Pine tree resin? Stickiest crap u cant get off your clothes or skin. You can cement your fingers together with it as easy as superglue. "Caution" Highly flammable if ignited. Free and plentiful, except it has the same problem as lard. You would need to keep the heat down for it to maintain its grip or viscosity.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Oct 2, 2014 14:29:54 GMT -5
They use pine pitch to hand grind telescope mirrors for reflecting telescopes. It is a low temp grind using low pressure. I see what you are saying about the dop wax. It is about as sticky as it gets. You can still sell long leaf pine stumps for resin here in the south.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Oct 2, 2014 14:59:48 GMT -5
I built a 20" rotary lap, haven't had time to perfect it, but I did find out a rock running in a consistent direction will wear a pattern. I see that as a disadvantage w/Sticks & Stones machine. Best to figure a way to rotate the rock too, or just run it by hand. I looked into flat cast iron manhole covers for a table, almost had two from up at the mill, but they decided to use them {after sitting for years, and I mentioned maybe getting them}. They had one hole about an inch in dia., easily plugged. Give it a thought, and watch your boneyards. check this one out Larry. An old timer built this, got the design from an older timer. The most insane lapper I ever saw was a 24 inch floor buff pad spinning at fast motor RPM 1725. Had a metal ring around it about 24.5 inches standing an inch around the edge of the pad. Then 3 or 4 pie rings or cut off rings of 6 " PVC pipe with slabs in them and plaster of paris poured over them. Wet the pad, and sprinkle 'some sized' SiC grit on it.(can not remember the grit size) Start the motor and put the 4 rings with slabs poured in them on the buffing pad slab side down. the 4 rings would spin around in 24 inch circles while rotating them selves like a planetary gear system. Malachite with a wet shine. About any soft stone would polish on it. As it ended up polishing on its own dust. It was left running for about 12 hours. It was a dusty operation. But the highest polish I have ever seen.
|
|
spiritstone
Cave Dweller
Member since August 2014
Posts: 2,061
|
Post by spiritstone on Oct 2, 2014 19:07:43 GMT -5
They use pine pitch to hand grind telescope mirrors for reflecting telescopes. It is a low temp grind using low pressure. I see what you are saying about the dop wax. It is about as sticky as it gets. You can still sell long leaf pine stumps for resin here in the south. Found one more use, Bush band.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Oct 2, 2014 20:11:51 GMT -5
They use pine pitch to hand grind telescope mirrors for reflecting telescopes. It is a low temp grind using low pressure. I see what you are saying about the dop wax. It is about as sticky as it gets. You can still sell long leaf pine stumps for resin here in the south. Found one more use, Bush band. too funny, cut logs even smell good
|
|
quartz
Cave Dweller
breakin' rocks in the hot sun
Member since February 2010
Posts: 3,341
|
Post by quartz on Oct 2, 2014 23:07:23 GMT -5
That lap you described, and did it so well I can see it running, thanks, would be a very practical one. Methinks a very good idea, and weight could easily be added as needed on the wet plaster. You got me thinking again, had the same basic idea but hadn't thought of the Plaster of Paris.
|
|
|
Post by nowyo on Oct 2, 2014 23:29:59 GMT -5
They use pine pitch to hand grind telescope mirrors for reflecting telescopes. It is a low temp grind using low pressure. I see what you are saying about the dop wax. It is about as sticky as it gets. You can still sell long leaf pine stumps for resin here in the south. Found one more use, Bush band. Oh hell, now I just have to build one of those! Too cool! Russ
|
|
snuffy
Cave Dweller
Member since May 2009
Posts: 4,319
|
Post by snuffy on Oct 3, 2014 7:49:42 GMT -5
Good Lard,whats next? snuffy
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Oct 3, 2014 8:44:03 GMT -5
That lap you described, and did it so well I can see it running, thanks, would be a very practical one. Methinks a very good idea, and weight could easily be added as needed on the wet plaster. You got me thinking again, had the same basic idea but hadn't thought of the Plaster of Paris. Not sure if 1725 RPM is necessary. That is fast for a 24 inch disc. It actually slips past the 'planets'. So the planets are rotating, the pad is still moving faster and slipping under them, everything is being mixed. The initial charge of SiC grit is just to get some rock dust loose on the pad. I can not remember the grit initially sprinkled. Mr. Burke said he sold the malachite slabs at will due to their polish. And would never tell his secret to the sweet polish. it gave him 'bragging rights' which knowing him inflicted on the guys at the rock shows. i got Polaroids of the thing at Florida camp. Not pie rings, they are called baking rings. sorry about that. Here they are:
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Oct 3, 2014 8:51:41 GMT -5
Found one more use, Bush band. Oh hell, now I just have to build one of those! Too cool! Russ My ground deer blinds are all built like that. Cheap and fast to build. Materials right on the spot. Metal folding chair, gun rest, natural looking.
|
|
jamesp
Cave Dweller
Member since October 2012
Posts: 36,159
|
Post by jamesp on Oct 3, 2014 8:54:16 GMT -5
Good Lard,whats next? snuffy Perhaps bodily excrements Snuffy Good Lard
|
|