jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
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Post by jamesp on May 14, 2016 6:00:17 GMT -5
Slow at 8 rotations in 39 second video(8 X 60 sec divided by 39) = 12.3 RPM Better for finishing soft rocks. Faster but a bit slow for 7 inch barrel for coarse grind, perfect for fine grit and polish on hard Mohs 7 rocks. 12 rotations in 24 seconds video = 30 RPM: After experimenting with clay slurry am going back and doubling to 60 RPM for coarse grind. Do SiC 30 grit additions every 48 hours. To accomplish speed change: Shaft set on left spin barrels at 30 RPM directly from motor. Small reduction pulley on 2nd shaft from left is 2:1 driving right side barrel shafts, so right barrel is turning at half of 30 RPM. By simply reversing small pulley with it's large pulley on 3rd shaft from left the right barrel will turn double left barrel at 60 RPM. Belt length will be same, simply reversed the 2:1 pulley set. Such a speed increase WILL put more load on the 1725 RPM 1/3 HP motor. Should be fine, motor running cool as is. Thicker clay slurry also uses more electricity because of increased friction. Try rolling a barrel with watery slurry down an incline, then try rolling it with thick slurry. Takes a steeper incline to roll thick slurry. End result is a 30 RPM set of shafts for finishing, and the longer right side shafts will be used for coarse grind. Better to have more coarse barrels than finishing barrels. Coarse side closest to camera, finishing speed in rear.
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
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Post by jamesp on May 14, 2016 6:41:40 GMT -5
Got to like 'taper lock bushings'. They allow using pulleys(sheaves) without key ways on shafts. Plus they are not hardly effected by rust and allow ratio changes easily. Bought all pulleys bearings shaft clamp collars at Surplus Center.
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Post by orrum on May 14, 2016 7:56:57 GMT -5
That's a awesome setup!
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
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Post by jamesp on May 14, 2016 9:34:05 GMT -5
It's certainly overdone Bill. Have liked the changeable pulleys to change speeds. Me and worker blend fertilizer on it . Three 50 pound bags in a 16 gallon screw cap plastic drum. Poor machine catches it.
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Post by Rockoonz on May 14, 2016 11:40:13 GMT -5
Seriously industrial strength, you do excellent work. Is that 1 inch shafting? What's your motor and big pulley diameters? I'm looking to calculate the rolling surface speeds cause I need to build a new tumbler base, mama gave up on the old one.
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Deleted
Deleted Member
Member since January 1970
Posts: 0
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Post by Deleted on May 14, 2016 12:36:47 GMT -5
Seriously industrial strength, you do excellent work. Is that 1 inch shafting? What's your motor and big pulley diameters? I'm looking to calculate the rolling surface speeds cause I need to build a new tumbler base, mama gave up on the old one. X2 I am building now, as well.....
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
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Post by jamesp on May 14, 2016 15:47:56 GMT -5
Seriously industrial strength, you do excellent work. Is that 1 inch shafting? What's your motor and big pulley diameters? I'm looking to calculate the rolling surface speeds cause I need to build a new tumbler base, mama gave up on the old one. Motor has a 2-2.5 Big pulley is 18.75, biggest Surplus Center had to offer. is/was expensive @ $40+ Motor 1725 Shafts 1.5 inch stuff that was in the bone yard. Fat shaft forced monster pulley after the fact. Ha, 3/4 shaft would have been fine with 9 For 2nd set of shafts, transfer reduction 3 and 6 and a 5, for fooling with speeds
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
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Post by jamesp on May 14, 2016 18:49:21 GMT -5
Seriously industrial strength, you do excellent work. Is that 1 inch shafting? What's your motor and big pulley diameters? I'm looking to calculate the rolling surface speeds cause I need to build a new tumbler base, mama gave up on the old one. X2 I am building now, as well..... If doing another I would do it like Intheswamp on wood except use 1 inch shafts
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es355lucille
starting to spend too much on rocks
Member since February 2016
Posts: 194
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Post by es355lucille on May 15, 2016 22:58:01 GMT -5
Nice setup James!
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jamesp
Cave Dweller
Member since October 2012
Posts: 36,561
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Post by jamesp on May 15, 2016 23:04:10 GMT -5
Thanks Brad. It was made on a heavy factory roll cart. Heavy.
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