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John Polacchi
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  • Santa Rosa, CA
  • United States
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John Polacchi's Discussions

specialty size screws
12 Replies

It has been a long time since I have been in here.I was involved with allot of other things that my hobby did not provide room for.I'm not sure if I am posting in the right place?If I am posting in…Continue

Started this discussion. Last reply by John Polacchi Apr 24.

Silver Brazing "small" balls to rods
10 Replies

Here's another subject I know has come up in the past,or at least I know that "silver brazing" is no stranger to subject matter.This is one skill I have yet to really master. I find myself needing to…Continue

Started this discussion. Last reply by John Polacchi Mar 31, 2014.

Possibly an old subject but...ridding a urethane rubber surface of gloss/shine to get a "matte" finish
4 Replies

Does anyone know how you can remove/get rid of the glossyness/shine of a urethane rubber casting?I know that silicone you can use a dulling/matte powder that you dust onto a tacky surface when…Continue

Started this discussion. Last reply by John Polacchi Mar 20, 2014.

BASIC SHOP SAFETY

Hello everyone,I thought I'd put in something a little shorter and save the next time for more involved subjects and information.Basic "shop" safety,a no brainer,right?I'm guessing that most of us in…Continue

Started Jan 29, 2014

 

John Polacchi's Page

Latest Activity

John Polacchi replied to John Polacchi's discussion specialty size screws
"00-90 threads cap head screws.The price to have them made is astronomical,mainly its the minimum run Id have to commit to.25,000 screws at...something like $1.70 per screw it will(would) have a smaller head diameter,profile and smaller hex…"
Apr 24
Greyguy replied to John Polacchi's discussion specialty size screws
"what thread size? Check McMaster Carr"
Apr 24
John Polacchi replied to Benédict Bevan's discussion Custom armatures
"It can be done.I have seen some "tightly wound" wire formed into a hand for a pretty small scale.Machining...I think there is a limit to "how small" you can machine a joint that will function and work,not break,hold its position…"
Apr 20
Dave Cooley replied to John Polacchi's discussion specialty size screws
"Micromark is a favorite of model railroaders: https://www.micromark.com/hobby-supplies/hardware As a long-time specialty fastener buyer I found that the clue to finding tiny screws is the word "miniature" (as Nick mentioned). Even in…"
Apr 19
John Polacchi replied to Benédict Bevan's discussion Custom armatures
"I've seen that hand armature before.Its pretty big to my recollection.It was a large armature...maybe 1/4 scale?I think it went to a King Kong type of character/subject,but I'm not 100% sure?I forget who made the armature?Someone of…"
Apr 19
John Polacchi replied to John Polacchi's discussion specialty size screws
"Actually I take the back.The AB stands fur some other designation I'm not familiar with.I saw it briefly in the catalog but not I forget already what it was an abbreviation of.There's not much there on the web site or catalog I could see…"
Apr 15
John Polacchi replied to John Polacchi's discussion specialty size screws
"I believe "A" and "B" are the class of threads."
Apr 15
John Polacchi replied to John Polacchi's discussion specialty size screws
"The smallest "allen head" drives are .028 and .035.Not sure what that is in mm?Those are readily available even if you have to buy an entire set to get them.The smallest I've seen were .035 on machine head counter sink screws,but the…"
Apr 15
StopmoNick replied to John Polacchi's discussion specialty size screws
"Looking further, I found the small metric screws on eBay for very low price.  I automatically get eBay Au and Australian dollar prices when I search, but I'm sure they would be available in the US and UK as well.   Not sure if these…"
Apr 15
John Polacchi replied to John Polacchi's discussion specialty size screws
"There are smaller screws with tiny,tiny hex drives on some of them.They "may have been metric",but not necessarily.These screws (they are set screws) so,"no head" on them. I've never had a use for them and I'm not sure…"
Apr 15
StopmoNick replied to John Polacchi's discussion specialty size screws
"This sort of place - https://www.pollymodelengineering.co.uk/sections/bruce-engineering/docs/archive.cat_may08.pdf You have to scroll way way down to get to the nuts and screws - first, imperial in BA sizes (I don't know what that means)…"
Apr 15
StopmoNick replied to John Polacchi's discussion specialty size screws
"I have seen miniature screws online somewhere - not just the heads were small, the threads were tiny as well.  Might have been in connection with a model engineering site. People who make miniature stem engines, that kind of thing. Worth…"
Apr 15
John Polacchi replied to John Polacchi's discussion specialty size screws
"I thought about doing that too.Its one thing if I'm working on my own projects,"its just time",but if I end up doing jobs and either making joints or full assemblies (like hands for instance),that adds to the "time clock"…"
Apr 15
Simon Tytherleigh replied to John Polacchi's discussion specialty size screws
"This might be blindingly obvious, but when I want to reduce the size of a screw head, I put it in the drill and then turn it while either holding it against a grinder or a hand file held in the vise. You might be able to make a mini cap head from a…"
Apr 15
John Polacchi posted a discussion

specialty size screws

It has been a long time since I have been in here.I was involved with allot of other things that my hobby did not provide room for.I'm not sure if I am posting in the right place?If I am posting in the wrong place please tell me and have my subject moved accordingly,but I think this belongs in "armatures".So,I have to make this short,but I am looking into getting some "specialty screws" made(very small socket head cap screws).Problem is,the minimum run is 25,000 screws.I don't know how much it…See More
Apr 14
John Polacchi replied to Benédict Bevan's discussion Custom armatures
"Hopefully soon I'll get to start machining joints for hands.Out of curiosity,what scales are you working in?"
Apr 14

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