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Jack Cole Ph. 503-510-0789 
Dallas,Oregon 
lapidaryrough@gmail.com
Upper north fall,Silver creek falls state park Oregon. Me 2005
Covington  Large Sphere Machine 1''1/4  x 9''  Spheres. Rough cut 80 grit only. 80 grit is classified to size. Or finer grit.
 To speed up surface cut I grind dime size flat spot all over the surface of the sphere.  and i use cup size of 1/2 - 2/3rds the length of  spheres diameter, for rough cutting the surface grind with 80 grit.  for truing the sphere, Use  1/4 - 1/3 cup size of  diameter for finish of sphere before the polish stage with different cups only for use with polish.   
​
24 Inch home made buff pad. with Lamb wool carpet pad. 265 RPM.
Highland-Parks Combo-unit Model E-10 year 1955. 
Though you see the upgrade i made.  Nova  8'' diamond plated wheels,   80 grit  -   120 grit -  320 grit  
 I still have the wore out   9''  Highhland-Park black diamond blade it came with. Now 303 MK-Blade  8'' gem-king.
1982 Highland-Park slab saw ( 24 Inch Blade ).
Best to run at 6- 8 minutes to the inch! on MOH-scale 7 or harder.
Though to re face a blade high speed is about 4 minutes to inch. with a block of Obsidian to clean the blade.
 reveres the blade often to clean the back ramp of matrix that  builds up on the back side of the diamond in the matrix of the slot. ( Natch blades by MK-.com )  Are the ONLY Blade out there for my saws. ( 297 - 301 - 303  ) Gem-King.
1978  Chevy Camper special 15/16 rock hunting partners.
10 inch grinder / with old 10'' drum. Sand paper is belt strips their about a   34'' x  3''.  Arbor shaft is 1-1/8th in.  The same millwright at work.
Home made tumbler, drum is 11'' x  24'' center shaft Babbitt bearings 1/2 Hp. motor.  Drum RPM  - 16. Load limit depends on material 2/3 - 3/4  about 50 - 60 Lbs.
I use this one for rough grind of material. such as fire agate rough, carnelian agate, Sheen obsidian rough to cut the Patina off the surface, to zone the material for sheen cut.
​
Viking VT-12 - Commercial Vibratory Tumbler  &   Vibra Sonic Tumbler - VSV-50. 
Both of these I only use 220 grit or finer.  Rotary to rough cut the material,  Then vibra sonic to finish. I use each grit much longer then the tumbling world does!( 220 grit for 3 weeks grinds down to  1200 grit in 2nd week in loads heavier then 15 lbs. )
Viking VT-12 - Commercial Vibratory Tumbler  &   Vibra Sonic Tumbler - VSV-50. 
Both of these I only use 220 grit or finer.  Rotary to rough cut the material,  Then vibra sonic to finish. I use each grit much longer then the tumbling world does!( 220 grit for 3 weeks grinds down to  1200 grit in 2nd week in loads heavier then 15 lbs. )
Highland-Park Viber-Lap.
I only use 220 grit or finer on the lap. I per-face all material of saw marks and break off edge, before lapping flats.
18 inch  steel rotary lap. ( 178 RPM )    Lebanon,Oregon millwright built this lap mid-60s and i have used a lot of other rotary laps, they bog down burn motor  out bearing ware.....long list of why you should build your on lapidary equipment.....
 Every bolt is grade 8 with Allen hex head bolts. Ive had it over 20 years. Never a belt change and several hundred ponds of Brazilian agate per-polished on it for the  27''  Highland-Park Viber-laps. 
​
18 inch  steel rotary lap. ( 178 RPM )    Lebanon,Oregon millwright built this lap mid-60s and i have used a lot of other rotary laps, they bog down burn motor  out bearing ware.....long list of why you should build your on lapidary equipment.....
 Every bolt is grade 8 with Allen hex head bolts. Ive had it over 20 years. Never a belt change and several hundred ponds of Brazilian agate per-polished on it for the  27''  Highland-Park Viber-laps. 
​
 Some of the toys in the shop, I use to turn rock to mud.  
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1978  Chevy Camper special 15/16 rock hunting partners. 
1982 Highland-Park slab saw ( 24 Inch Blade ).
Best to run at 6- 8 minutes to the inch! on MOH-scale 7 or harder.
Though to re face a blade high speed is about 4 minutes to inch. with a block of Obsidian to clean the blade.
 reveres the blade often to clean the back ramp of matrix that  builds up on the back side of the diamond in the matrix of the slot. ( Natch blades by MK-.com )  Are the ONLY Blade out there for my saws. ( 297 - 301 - 303  ) Gem-King.     
Highland-Park Viber-Lap.
I only use 220 grit or finer on the lap. I per-face all material of saw marks and break off edge, before lapping flats.
24 Inch home made buff pad. with Lamb wool carpet pad. 265 RPM.
18 inch  steel rotary lap. ( 178 RPM )    Lebanon,Oregon millwright built this lap mid-60s and i have used a lot of other rotary laps, they bog down burn motor  out bearing ware.....long list of why you should build your on lapidary equipment.....
 Every bolt is grade 8 with Allen hex head bolts. Ive had it over 20 years. Never a belt change and several hundred ponds of Brazilian agate per-polished on it for the  27''  Highland-Park Viber-laps. 

Highland-Parks Combo-unit Model E-10 year 1955. 
Though you see the upgrade i made.  Nova  8'' diamond plated wheels,   80 grit  -   120 grit -  320 grit  
 I still have the wore out   9''  Highhland-Park black diamond blade it came with. Now 303 MK-Blade  8'' gem-king.
Home made tumbler, drum is 11'' x  24'' center shaft Babbitt bearings 1/2 Hp. motor.  Drum RPM  - 16. Load limit depends on material 2/3 - 3/4  about 50 - 60 Lbs.
I use this one for rough grind of material. such as fire agate rough, carnelian agate, Sheen obsidian rough to cut the Patina off the surface, to zone the material for sheen cut.

Viking VT-12 - Commercial Vibratory Tumbler  &   Vibra Sonic Tumbler - VSV-50. 
Both of these I only use 220 grit or finer.  Rotary to rough cut the material,  Then vibra sonic to finish. I use each grit much longer then the tumbling world does!( 220 grit for 3 weeks grinds down to  1200 grit in 2nd week in loads heavier then 15 lbs. )
Covington  Large Sphere Machine 1''1/4  x 9''  Spheres. Rough cut 80 grit only. 80 grit is classified to size. Or finer grit.
 To speed up surface cut I grind dime size flat spot all over the surface of the sphere.  and i use cup size of 1/2 - 2/3rds the length of  spheres diameter, for rough cutting the surface grind with 80 grit.  for truing the sphere, Use  1/4 - 1/3 cup size of  diameter for finish of sphere before the polish stage with different cups only for use with polish.   


10 inch grinder / with old 10'' drum. Sand paper is belt strips their about a   34'' x  3''.  Arbor shaft is 1-1/8th in.  The same millwright at work. 
Viking VT-12 - Commercial Vibratory Tumbler  &   Vibra Sonic Tumbler - VSV-50. 
Both of these I only use 220 grit or finer.  Rotary to rough cut the material,  Then vibra sonic to finish. I use each grit much longer then the tumbling world does!( 220 grit for 3 weeks grinds down to  1200 grit in 2nd week in loads heavier then 15 lbs. )
Viking VT-12 - Commercial Vibratory Tumbler  &   Vibra Sonic Tumbler - VSV-50. 
Both of these I only use 220 grit or finer.  Rotary to rough cut the material,  Then vibra sonic to finish. I use each grit much longer then the tumbling world does!( 220 grit for 3 weeks grinds down to  1200 grit in 2nd week in loads heavier then 15 lbs. )
 Rotary tumbler grit for rough grind 80 grit.  The 80 grit  turns to 400 grit in about 3 weeks in this tumbler. 
   mix grades like 60/90 - 40/70. MOH-Scale 7 higher in hardness !!! - Principle at School of hard - Knocks,  Obsidian  - softer material. adjust grit as needed. sometimes 220 grit for rough cut - finer.  Vibra - sonics use less then a ounce of water KEEP  the rock much dryer for faster cut. 

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50 Years later still playing in the rock pile.