lorenzo
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Member since July 2015
Posts: 12
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Post by lorenzo on Mar 15, 2018 19:24:42 GMT -5
lorenzo - I'm not sure the configuration of the grinder you're designing, but 5/8" might be undersized. Many machines have 1" shafts & bearings. Lynn I'm trying to build a supergrinder using stacked diamond saw blades .... and if I'm feeling brave, I may try that 'tuck blade' that user jamesp has posted about in the past. A 5/8" arbor hole is common in those blades where as 3/4" and larger is not.
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lorenzo
off to a rocking start
Member since July 2015
Posts: 12
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Post by lorenzo on Mar 15, 2018 17:00:59 GMT -5
Highland Park used pillow block bearings on most of their equipment back in the day. A lot of that equipment is still running with original bearings. Thanks! I understand they have been used in the past without issues in various lapidary applications. I can find brand name bearings which can surely handle the rpms... but they are like $70 each. My inexpensive grinder idea is quickly becoming expensive. I'm wanting to know if anyone has purchased and successfully used the more affordable 'chinese' bearings... which rarely mention an rpm rating. Such as these: www.amazon.com/UCP202-10-Pillow-Block-Bearing-Pieces/dp/B01IWGKNVEAm I overthinking this?
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lorenzo
off to a rocking start
Member since July 2015
Posts: 12
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Post by lorenzo on Mar 15, 2018 13:31:29 GMT -5
I'm trying to build a simple grinding station so I can preform and do touch up on material intended for tumbling. My goal is to use a 5/8" shaft supported by pillow block bearings but I have read that standard pillow block bearings are only rated to about 650 rpms... not the 1700+ I'll be running. Has anyone had issues with the common/affordable bearings found on amazon or ebay? Thx!
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lorenzo
off to a rocking start
Member since July 2015
Posts: 12
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Post by lorenzo on Nov 10, 2017 2:21:48 GMT -5
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lorenzo
off to a rocking start
Member since July 2015
Posts: 12
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Post by lorenzo on Nov 10, 2017 0:24:20 GMT -5
Not sure if it has been mentioned on this forum yet... but there are workarounds that allow you to see blocked photobucket 3rd party pics. These workarounds are in the form of addons for firefox, chrome and opera. I use firefox and have this addon installed: 'Photobucket Hotlink' direct link to addon- addons.mozilla.org/en-US/firefox/addon/photobucket-fix/?src=apiIt loads photobucket pics just like the good ol days. the same addon is available for chrome and opera. I wouldn't count on it working forever so get your desired pics while you can.
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lorenzo
off to a rocking start
Member since July 2015
Posts: 12
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Post by lorenzo on Oct 21, 2017 1:39:14 GMT -5
lorenzo drill them with a step drill on a drill press. Step drills have steps in 1/8 inch increments generally. When I did it I cut a piece of wood scrap to put under the blade. I then pre drilled a relief in the wood. Placed the blade over the hole and, with it off, brought the drill down to the step on the drill that matched the blade hole and turned it by hand backwards to make sure it was centered and clamped it down. Then drill to the next step, or 2 steps if going from 1/2 to 3/4. If it makes a burr on the underside you can either use the edge of the next step bigger to remove the burr by hand when you'r done or very carefully on the drill press. Thanks for the helpful tips! I already have the stepped bits. I think I got them from harbor freight a few years ago.... hopefully they are up to the task. Now I just need to find some inexpensive blades. Thanks everyone for the replies!
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lorenzo
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Member since July 2015
Posts: 12
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Post by lorenzo on Oct 20, 2017 16:33:43 GMT -5
I'm confused. If my arbor size is 3/4" and most saw blades have smaller holes - 5/8"... what does a spacer/bushing allow me to do? ah thought your arbor was 1/2 shouldn't be difficult to find 3/4, google I've been all over google. Nothing found which meets my criteria of an 8" or smaller blade with a 3/4" arbor hole and somewhat affordable < $7 a blade.
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lorenzo
off to a rocking start
Member since July 2015
Posts: 12
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Post by lorenzo on Oct 20, 2017 15:35:27 GMT -5
Prior to purchasing, I didn't realize how large the shaft diameter was on these arbors. 3/4" on mine... is that standard? I can't find any inexpensive diamond saw blades which fit 3/4". How is everyone getting around this issue? Thanks. L look for spacers or bushings so a 1/2 size will fit. I'm confused. If my arbor size is 3/4" and most saw blades have smaller holes - 5/8"... what does a spacer/bushing allow me to do?
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lorenzo
off to a rocking start
Member since July 2015
Posts: 12
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Post by lorenzo on Oct 20, 2017 14:39:46 GMT -5
Prior to purchasing, I didn't realize how large the shaft diameter was on these arbors. 3/4" on mine... is that standard?
I can't find any inexpensive diamond saw blades which fit 3/4". How is everyone getting around this issue?
Thanks. L
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lorenzo
off to a rocking start
Member since July 2015
Posts: 12
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Post by lorenzo on Dec 10, 2016 12:04:34 GMT -5
Thanks everyone. I wasn't offended by the plumbers comments. mohs, the brown jasper (might be generous calling it jasper. chert?) came from the Rodeo Flats area. I'll post pics when/if I can find them. edit* found a pic. Don't laugh but imagine seeing a couple of trays and some small buckets full of this stuff. You almost have to agree with the plumber... leaverites. imgur.com/a/Z2stv - Hope that link works.
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lorenzo
off to a rocking start
Member since July 2015
Posts: 12
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Post by lorenzo on Dec 8, 2016 14:09:50 GMT -5
I'm a beginner rockhound and wannabe tumbler. I thought I was doing pretty good until I recently had my rock collection made fun of... It happened when I needed some emergency plumbing work done and one of the plumbers looked at my small but growing pile of rocks on the side of my home and said, "I see you got a lot of nice leaverites". Confused about what he was saying, I looked at him and managed a half smile. Then he said, "Leaverites. You know, as in you should 'leave them right there in the desert'". I told him I'm new to the hobby and I just like having a excuse to get out and explore the desert. The plumbers left and as I looked at my 'special collection' I realized the cruddy brown jasper pieces and the boring pastelite? agate were not very special at all. I know I have a long way to go and many miles to cover but I love being outside looking for rocks... it recharges my spiritual battery. I've been browsing the board for awhile and hopefully I can share/give back someday. Also it would be nice to meet some of you locals...as long as you are not a plumber --Larry
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