Jump to content




Photo

Another aluminum endbell question


  • Please log in to reply
13 replies to this topic

#1 havlicek

havlicek

    OCD Rewinder

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 9,014 posts
  • Joined: 20-August 07
  • Gender:Male
  • Location:NY

Posted 19 May 2017 - 02:48 PM

     I have some of those itty bitty Koford end bell insulator washers that cost a bazillion dollars.  It seems that they should go inside the spring cups, and indeed they stop shorts when placed inside there.  The problem I have is that the Hawk cups are too small on the ID, so you have to force them to get them in there.  Soooo...should they go underneath the cups?...OR...is there an anodized cup that's a bit larger they'd fit into that I should be looking at?

 

 


John Havlicek




#2 Lee Palmer

Lee Palmer

    Rookie Keyboard Racer

  • Full Member
  • Pip
  • 38 posts
  • Joined: 23-February 16
  • Gender:Male
  • Location:Boise, ID

Posted 19 May 2017 - 02:56 PM

I believe the insulator is to prevent the screw from shorting the cups. I think the anodizing insulates, but screws placed into drilled and tapped aluminum will short. So yes, between screw and cup. I use the tiny Teflon ones. Same size as screw head. Get mine from Joel at Camen

Sent from my SM-N910V using Tapatalk

#3 MSwiss

MSwiss

    Grand Champion Poster

  • Advertiser
  • PipPipPipPipPipPipPipPip
  • 17,892 posts
  • Joined: 16-April 06
  • Gender:Male

Posted 19 May 2017 - 03:20 PM

Just turn (or sand) them down to required diameter.

With all the machinery you have, it should be relatively easy.

Make a mandrel the diameter you prefer the insulator to be.

That way, you can use that as your guide as to how far you should go.

Centerdrill the end, and tap, to take an 0-80 screw.

You are basically making a smaller diameter, Dremel 402 mandrel.

Once made, you can probably sand the diameter of the insulator down.

402.jpg
  • havlicek, wbugenis and old & gray like this

Mike Swiss
 
IRRA® Components Committee Chairman
Five-time USRA National Champion (two G7, one G27, two G7 Senior)
Two-time G7 World Champion (1988, 1990)
Eight-time G7 King track single lap world record holder
17B West Ogden AveWestmont, IL 60559, ( 708) 203-8003
mikeswiss86@hotmail.com (also my PayPal address) 
Note: Send all USPS packages and mail to: 5858 Chase Ave., Downers Grove, IL 60516
Make checks out to Chicagoland Woodworking, Inc.


#4 Phil Hackett

Phil Hackett

    Posting Leader

  • Full Member
  • PipPipPipPipPipPipPip
  • 4,402 posts
  • Joined: 29-January 07
  • Gender:Male
  • Location:A Big Red Star on a Kremlin Map

Posted 19 May 2017 - 03:31 PM

Only hard anodizing properly insulates against shorting.


Click HERE to contact Sonic Products. The messenger feature on my Slotblog account has been disabled.

Posted Image

#5 wbugenis

wbugenis

    On The Lead Lap

  • Subscriber
  • PipPipPipPip
  • 258 posts
  • Joined: 17-December 09
  • Gender:Male
  • Location:Brooklyn, NY

Posted 19 May 2017 - 03:53 PM

Just turn (or sand) them down to required diameter.

With all the machinery you have, it should be relatively easy.

Make a mandrel the diameter you prefer the insulator to be.

That way, you can use that as your guide as to how far you should go.

Centerdrill the end, and tap, to take an 0-80 screw.

You are basically making a smaller diameter, Dremel 402 mandrel.

Once made, you can probably sand the diameter of the insulator down.

attachicon.gif402.jpg

 

 

With a mandrel like that  and some teflon sheet from Mc master, you can make your own insulators 


  • MSwiss, havlicek and Geary Carrier like this
William Bugenis

#6 havlicek

havlicek

    OCD Rewinder

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 9,014 posts
  • Joined: 20-August 07
  • Gender:Male
  • Location:NY

Posted 19 May 2017 - 04:02 PM

Just turn (or sand) them down to required diameter.

With all the machinery you have, it should be relatively easy.

Make a mandrel the diameter you prefer the insulator to be.

That way, you can use that as your guide as to how far you should go.

Centerdrill the end, and tap, to take an 0-80 screw.

You are basically making a smaller diameter, Dremel 402 mandrel.

Once made, you can probably sand the diameter of the insulator down.

attachicon.gif402.jpg

 

Thanks Mike...I did something like that for now, but I'll do something more precise in the future.  Meanwhile, two end bells and no shorts!


  • MSwiss and olescratch like this
John Havlicek

#7 havlicek

havlicek

    OCD Rewinder

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 9,014 posts
  • Joined: 20-August 07
  • Gender:Male
  • Location:NY

Posted 19 May 2017 - 04:03 PM

Only hard anodizing properly insulates against shorting.

 

 

Hi Phil,

 

     That really doesn't help. :D Whatever the cause, shorts with these things DO happen, and not just to me.  Learning what to do to prevent them in the best way is what I was looking for.


John Havlicek

#8 havlicek

havlicek

    OCD Rewinder

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 9,014 posts
  • Joined: 20-August 07
  • Gender:Male
  • Location:NY

Posted 19 May 2017 - 04:05 PM

I believe the insulator is to prevent the screw from shorting the cups. I think the anodizing insulates, but screws placed into drilled and tapped aluminum will short. So yes, between screw and cup. I use the tiny Teflon ones. Same size as screw head. Get mine from Joel at Camen

Sent from my SM-N910V using Tapatalk

 

Thanks for the quick reply Lee.  I kinda thought so...but wanted to be double-sure I wasn't doing something "stoopid"!  :)


John Havlicek

#9 Lee Palmer

Lee Palmer

    Rookie Keyboard Racer

  • Full Member
  • Pip
  • 38 posts
  • Joined: 23-February 16
  • Gender:Male
  • Location:Boise, ID

Posted 19 May 2017 - 04:06 PM

Never stops me. Lol

Sent from my SM-N910V using Tapatalk
  • havlicek likes this

#10 Phil Hackett

Phil Hackett

    Posting Leader

  • Full Member
  • PipPipPipPipPipPipPip
  • 4,402 posts
  • Joined: 29-January 07
  • Gender:Male
  • Location:A Big Red Star on a Kremlin Map

Posted 19 May 2017 - 06:33 PM

 

 

Hi Phil,

 

     That really doesn't help. :D Whatever the cause, shorts with these things DO happen, and not just to me.  Learning what to do to prevent them in the best way is what I was looking for.

 

John, I should have quoted the post I was responding to. It wasn't directed to you. You have a solid understanding of what you are doing and figuring out how to solve problems. I have respect.


  • havlicek likes this
Click HERE to contact Sonic Products. The messenger feature on my Slotblog account has been disabled.

Posted Image

#11 Robert BG

Robert BG

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 289 posts
  • Joined: 12-May 16
  • Gender:Male
  • Location:Southern NJ and Bulgaria

Posted 20 May 2017 - 02:32 AM

John, the Koford insulators are better when they fit but in a case like this, I use the Slick-7 insulators.They're a lot cheaper and they fit inside certain cups better.


  • havlicek likes this
Robert Fothergill

#12 havlicek

havlicek

    OCD Rewinder

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 9,014 posts
  • Joined: 20-August 07
  • Gender:Male
  • Location:NY

Posted 20 May 2017 - 04:59 AM

 

John, I should have quoted the post I was responding to. It wasn't directed to you. You have a solid understanding of what you are doing and figuring out how to solve problems. I have respect.

10-4 Phil...and respect right back also!

 

 

 

John, the Koford insulators are better when they fit but in a case like this, I use the Slick-7 insulators.They're a lot cheaper and they fit inside certain cups better.

Yeah, the Koford ones DO seem like they'd be more reliable...IF they fit :)


John Havlicek

#13 Robert BG

Robert BG

    On The Lead Lap

  • Full Member
  • PipPipPipPip
  • 289 posts
  • Joined: 12-May 16
  • Gender:Male
  • Location:Southern NJ and Bulgaria

Posted 21 May 2017 - 01:36 AM

One last thing is I've put the S7 washers under the screw head inside the cup and also on the bottom.It's probably overkill and unnecessary but it keeps the whole assembly together and makes installing the fiddly things a lot easier ;-)  


Robert Fothergill

#14 havlicek

havlicek

    OCD Rewinder

  • Subscriber
  • PipPipPipPipPipPipPipPip
  • 9,014 posts
  • Joined: 20-August 07
  • Gender:Male
  • Location:NY

Posted 21 May 2017 - 04:44 AM

Gotcha Robert.  The one thing the socket head aluminum screws do help is assembly.  The socket head is a good fit so, even though they're not magnetic, they do stay on your allen wrench and make assembly easier.


John Havlicek





Electric Dreams Online Shop