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Edmund Extra Heavy Duty Mount comparison

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43 replies to this topic

#26 PawPaw

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Posted 30 May 2014 - 12:02 PM

May be a reference to needle bearings used in a washer format as a thrust washer? The teflon would just be a washer then. I've seen vintage Teflon in a top hat configuration that was both thrust and side in one application, on various other scopes.


The newer mount has 4 teflon pieces that the Edmund catalog description calls "teflon bearings". I agree they are not bearings per se but they do function as bearings. There are two flat teflon washers on both declination and polar shafts and the polar shaft, on this mount, has two teflon sleeves that fit radially in grooves on both ends of the shaft.

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#27 Chuck Hards

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Posted 30 May 2014 - 12:56 PM

Very good illustrative photos, thanks!

#28 rogue river art

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Posted 06 June 2014 - 12:37 AM

Here is my homemade mount, amazingly they look alike except the materials are different

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#29 Rich (RLTYS)

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Posted 06 June 2014 - 05:21 AM

Wow, that is a beautiful mount.

Rich (RLTYS)
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#30 apfever

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Posted 21 May 2018 - 08:45 AM

Hey, those are nifty mounts. Why don't I have one? wink.gif

because shipping would be more than Gramps.


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#31 apfever

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Posted 21 May 2018 - 08:50 AM

I just measured and there is a 20 degree difference on higher latitude. At the other end of the scale there is a 7 degree difference favoring the early model.

Try reversing the mount body on the cap tang going the other way. Most of this style I've seen will go further each way if you can reverse the mount to cap direction.



#32 apfever

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Posted 21 May 2018 - 08:53 AM

Mine's the newer offset type. Darn. I think it is more versatile and stronger on the cap tangs, but I'd rather have older. I'll live with it. I'm not buying, trading, or thinking of expanding. I do plan on getting to the 8" before I die. It will be nice to present it with the Deluxe and Super Conquerers on the grey mounts. All mounts different size, all with motors. I've posted enough of the two smaller ones. The 8" is barned. Why didn't they ever name it, only calling it the 8"? There was the Conquerer, Deluxe Conquerer, and Super Conquerer. I think "Whoopass Space Conquerer" would have created quite a market stir.

Wow, hey that's a great idea. I've probably read some of these ideas before but don't remember, at any rate time to move on one. I may have sold my straps and weights. Any one here buy them? I think one strap was a little funky, maybe the spot welding on a folded ribbon end around a catch. Maybe should just consolidate this string. It's not the same as the other string - right?



#33 clamchip

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Posted 21 May 2018 - 07:20 PM

If I'm using the stock saddle I make my own straps for the different scopes I use

on the Edmund Extra Heavy Duty.

What you do is buy one of those remarkably cheap Harbor Freight spot welders

( nice tool that's paid for itself many times) and buy some really big stainless pipe

clamps.

You then cut the clamp to length and remove the FEMALE from the clamp and

add another MALE, so your clamp now has a MALE on both ends.

Line with felt, add wings nuts.

Robert

 

IMG_8581.jpg

IMG_8582.jpg


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#34 CHASLX200

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Posted 21 May 2018 - 07:25 PM

Hey, those are nifty mounts. Why don't I have one? wink.gif

Best mount i ever had. Loved it. Left it out side for a 8" F/8 newt. It had the clamp locks. I would die for another one.

 

Here it is left of the Unitrons back in 1988.

 

fwk9bb.jpg


Edited by CHASLX200, 21 May 2018 - 07:29 PM.

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#35 CHASLX200

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Posted 21 May 2018 - 07:32 PM

I noticed the low prices myself. I've seen a couple go by for 150 or less! I, also, keep dreaming I'll find a Cave observatory class with 2" shafts somewhere close...

that at least has a *chance* of holding up Tubby (Meade DS16) properly, something neither it's stock EQ nor the dob base does!

2.5" shafts.  I had one and it just tore my back apart and i got rid of it.



#36 CHASLX200

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Posted 21 May 2018 - 07:34 PM

I think my mount had ream bores. I don't remember any bearings.  Also my 2" Shaft Starliner mount had no bearings in the DEC axis.



#37 apfever

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Posted 22 May 2018 - 07:39 PM

The lateral bearing IS a ream bore. The RA shaft has some recessed grooves for Teflon. The bearings mentioned are needle thrust bearings to go between the housings. Here's a picture of one.

 

NTB1226-2.jpg

 

 

 

 



#38 apfever

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Posted 03 June 2018 - 09:10 AM

How I did it down to two pictures. Here's the first.

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#39 apfever

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Posted 03 June 2018 - 09:11 AM

Here is the reality of it.

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#40 John Higbee

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Posted 16 June 2018 - 01:17 PM

Its a 6" f13.3, it looks small because the tube is 6 inch. I bought tube to match the cell which required 6 inch tube.
It is a match made in heaven a 6" refractor and the Edmund on a 70 inch pier. See where it puts the eyepiece when seated.

Robert - is 70" your pier height only, or height of pier and mount? (am considering making a new pier for the Spacek 6" f/15).

 

john and 6 inch at NEAF (1).jpg

 

thanks, John


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#41 clamchip

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Posted 16 June 2018 - 08:23 PM

Robert - is 70" your pier height only, or height of pier and mount? (am considering making a new pier for the Spacek 6" f/15).

 

attachicon.gif john and 6 inch at NEAF (1).jpg

 

thanks, John

Its pier and mount when I use 2 30" pipe sections.

The Edmund Extra Heavy Duty mount is standard 4" pipe and I have different lengths so I can

build the pier height to match the scope.

 

Robert


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#42 bremms

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Posted 17 June 2018 - 03:42 PM

John, That Spacek is way too big for a 4" dia pier. 5" would be bare minimum 6" would be better. The pier you have looks about 5-6"



#43 terraclarke

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Posted 18 June 2018 - 08:43 AM

Spacek 6” scope with pier as originally advertised in 1961:

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#44 John Higbee

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Posted 23 June 2018 - 12:15 PM

John, That Spacek is way too big for a 4" dia pier. 5" would be bare minimum 6" would be better. The pier you have looks about 5-6"

It's 6".  John




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