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PostPosted: December 28, 2018, 5:09 pm 
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Glad to hear Anne is on the recovery side of this.
All the best

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PostPosted: December 28, 2018, 9:22 pm 
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@horchoha
Thank you, Perry. Much appreciated.

I spent the day re-learning some old lessons, like locking down the fixed axes when doing a cut on a mill (vibrations spoil your precision!), but had fun none the less. The mini-mill Z-axis is built with the idea of a drill chuck being in place to hold tools. I bought a set of collets because I think they're a better way to go. They work great, but take inches off the location of the cutting tools in terms of the vertical, Z axis. So, I need a way to elevate the work. The head will not travel down far enough to touch the work pieces without help.
Attachment:
DSC04721.JPG


My drill press vise was adapted to the situation, and worked well. I don't have a good set of paralles for it. A scrap piece of 2x4 was used to back and secure the work. The clamp is insurance that the two work pieces stay registered while milling. It isn't ideal, but it worked.
Attachment:
DSC04719.JPG


This piece is 4", which is right at the edge of capacity for the drill press vise. I may need to invest in some more work holding pieces to mill larger pieces.

Cheers,


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Damn! That front slip angle is way too large and the Ackerman is just a muddle.

Build Log: viewtopic.php?f=35&t=5886


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PostPosted: January 2, 2019, 11:59 pm 
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I've got a question. Actually, I've got 2 questions. I've finished the sliding part of my chassis-side Panhard mount. It carries the bushing for the Panhard rod in a slot. It works great, and even finger tight, the bushing doesn't move, and rotates well on the stainless steel sleeve at its center. Here's the bushing I'm using. It's pretty much an industry-standard bushing from the circle track/road racing worlds.
Attachment:
DSC04724.JPG


Here's my sliding mount.
Attachment:
DSC04723.JPG


And, here are the two together. It's what's planned except I'll add a jam nut and Loctite to the one nut shown.
Attachment:
DSC04725.JPG


My two questions are: 1) how much torque should I apply to the main nut when the bushing is subjected to real life loads to prevent unintended movement?; and 2) what should I use as a lubricant to make sure the bushing insert continues to move freely in service?

It seems to me that a suitable lubricant should have some ability to "wick" into the joint between the steel outer jacket and the rubber of the bushing to ensure free movement. There is no zerk fitting or other external means to get lubricant in there. What do people typically use for a lubricant here?

Cheers,


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Damn! That front slip angle is way too large and the Ackerman is just a muddle.

Build Log: viewtopic.php?f=35&t=5886


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PostPosted: January 3, 2019, 7:00 am 
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The nut torque is based on the size of and grade of the nut and can be found on a chart:https://www.boltdepot.com/fastener-information/bolts/US-Recommended-Torque.aspx

The hardware is just a clamp. What it clamps is not a factor in determining the torque.

I normally use vaseline but there are better silicone based lubes for poly bushes. It is very thick so as not to wash out.

There should be washers on each side of the inner sleeve to spread the load to the slotted flanges and separate the bush from the slot. The slot only engages a small amount of the sleeve which can damage the sleeve and the slot and the bush can be damaged by the slot also.

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PostPosted: January 3, 2019, 2:31 pm 
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@MV8

Thanks for that information. I have bookmarked that torque table.

I see the logic of using the inside washers. Unfortunately, I didn't leave enough clearance for even 1 regular flat washer inside. There's a chance I might get two ultra-thin nylon washers in there. They'd just be sacrificial over the short haul, but maybe helpful none the less. I'll make space for regular washers going forward.

I'll poke around on the Internet for the lube. I've seen spray cans of rubber lube before, but never anything for poly bushes. The rubber spray is more like a Teflon powder carried in a solvent base. I don't think it would stay on long.

Cheers,

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Damn! That front slip angle is way too large and the Ackerman is just a muddle.

Build Log: viewtopic.php?f=35&t=5886


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PostPosted: January 3, 2019, 3:39 pm 
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https://www.energysuspensionparts.com/formula-5-prelube-bushing-lube.asp

This is the lube that comes when I by Energy Suspension bushings.

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'If man built it, man can fix it'
"No one ever told me I couldn't do it."
"If you can't build it safe, don't build it."

Perry's Locost Super Che7enette Build
Perry's TBird Based 5.0L Super 7 L.S.O
Perry's S10 Super 7 The 3rd
Perry's 4th Build The Topolino 500 (Little Mouse) Altered
Perry's 5th Build the Super Slant 6 Super 7
Perry's Final Build the 1929 Mercedes Gazelle


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PostPosted: January 3, 2019, 3:55 pm 
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Miatav8,MstrASE,A&P,F wrote:

I normally use vaseline but there are better silicone based lubes for poly bushes. It is very thick so as not to wash out.



Do you know of one that can be put in a grease gun?

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PostPosted: January 3, 2019, 6:01 pm 
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Lonnie,
You might try some shim washers, if you can get 1 standard washer in. Just measure it and divide by 2. MSC has them, but they ain't cheap.
Walt


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PostPosted: January 3, 2019, 9:00 pm 
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I would want hardened washers between the distance tube and the inside face of the slotted bracket, the ID of which is a tight match to the bolt size(or ID of the distance tube). This will better spread the pressure of the torqued bolt to bridge the slot. Otherwise you are focusing a lot of pressure in a very small area of the bracket made of soft steel.

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PostPosted: January 4, 2019, 6:43 am 
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carguy123 wrote:
Miatav8,MstrASE,A&P,F wrote:
I normally use vaseline but there are better silicone based lubes for poly bushes. It is very thick so as not to wash out.


Do you know of one that can be put in a grease gun?


Superlube silicone with ptfe in a "grease" viscosity should work well. The energy suspension formula 5 is extremely thick by comparison but is designed to cling where there is no grease fitting.

https://www.homedepot.com/p/Super-Lube- ... 932691-_-N

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Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12


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PostPosted: January 4, 2019, 12:21 pm 
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Thanks, I'm almost to the point of needing it

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PostPosted: January 4, 2019, 12:29 pm 
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Location: Carlsbad, California, USA
@horchoha
Thanks for that pointer, Perry. They even have a little educational video to explain the application of the product, which I watched.

@waltj
Thank you, Walt. My local hardware store actually has a very good assortmernt of nuts, bolts, washers and special fasteners through a company called Midwest Fastener (https://fastenerconnection.com/). They might even have shim washers. I'll have to check as I've never had a need for them before. I do know they have thin, very hard nylon washers for sure.

@rx7locost
Hardened washers? That's new to me, but makes sense in this application. That sounds like a McMaster-Carr item to me. With respect to this part, I'm going to press on without remaking it. I can remake it in the future and provide for washers at that time. I've still got so much to do that I need to keep making progress, so I won't "burn out" on this build. Thanks for the valuable info, though.

@mv8
I like the fact that it's at Home Depot. I have one 2 miles away. The price is very good too. Thanks.

Cheers all,

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Damn! That front slip angle is way too large and the Ackerman is just a muddle.

Build Log: viewtopic.php?f=35&t=5886


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PostPosted: January 4, 2019, 2:27 pm 
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Lonnie, For hardened washers, just look for Grade 8 washers. I never knew they existed either until I found them on the shelf at my local Menards. They might also be in your local Home Depot or Lowes since they are a similar retailer.

:cheers:

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Visit my ongoing MGB Rustoration log: over HERE

Or my Wankel powered Locost log : over HERE

And don't forget my Cushman Truckster resto Locostusa.com/forums/viewtopic.php?f=36&t=17766


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PostPosted: January 4, 2019, 5:32 pm 
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Tractor Supply carries them as well.


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PostPosted: January 5, 2019, 8:12 am 
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TRX wrote:
Tractor Supply carries them as well.
Tractor Supply is of my favorite race-car-parts stores! Not to mention I bought TWWTFM/s Christmas present there this year as well!

Ace Hardware has grade 8 stuff too, including washers.

:cheers:
JDK

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