Just Sharing This My Channel Master 1.8 project.

[Trust]

why would it be a problem to have threaded rod as opposed to no thread - its only the elevation angle - once set, its set, surely it doesnt matter if its threaded? does it....

You're right , no problem for the elevation adjustment , I make a mistake thinking it was the AZ movement .

 

[nelson_b]

why would it be a problem to have threaded rod as opposed to no thread - its only the elevation angle - once set, its set, surely it doesnt matter if its threaded? does it....

Thats right it wouldn,t be a problem - with the elevation fixed .....

The reason i replaced mine. and probably part of the reason it had become worn is that i have an elevation jack attached to my mount for fine tuning etc ... so iv removed the adjusting nuts - and the pivot bolt is not quite fully tightened .....

The dish was getting a quite noticeable side to side wobble on windy days .

 

[Manikm909]

mine came with elevation jack, that might be what caused it to jam over time - i wont be using elevation jack (to start with anyway)

im still perplexed as to why the bolt got so jammed, it was bone dry maybe it should be greased.

 

[Channel Hopper]

mine came with elevation jack, that might be what caused it to jam over time - i wont be using elevation jack (to start with anyway)

im still perplexed as to why the bolt got so jammed, it was bone dry maybe it should be greased.

All Channel Master mounts that I know of have been zinc galvanised, to a very high quality. Your's isn't and so I suspect it isn't the genuine article.

Did you get a picture of the bolt head before hammering ? It should also have a set of marks that denote the type and quality.

 

[Channel Hopper]

I've just been out in the yard (it's sunny ) and these are the bolts on three of the dishes outside, first one the CM 2.4, the Chinese 3m and the Prodelin 1.8m (anodised). I should know what the markings mean but it's been a really long time since I needed to.

The Prodelin and Chinese mounts have been outdoors for upwards of ten years, all bolts can still be undone with a decent spanner and there are only the smallest marks on the zinc surfaces, most likely down to previous assembly or poor storage as opposed to quality control since none were new when I got them.

 

[Manikm909]

cant make it out...

 

[cokeaddict]

8.8 tensile bolt should be fine (that's what 8.8 stands for in the picture from the CM 2.4 above).

 

[Channel Hopper]

cant make it out...

Are there any others on the mount with similar markings ? CM mounts have them on all, the locking bar end bolt is one that should be of a similar tensile strength.

 

[Channel Hopper]

https://idot.illinois.gov/Assets/uploads/files/Doing-Business/Manuals-Guides-&-Handbooks/Highways/Materials/Metals/fasteneridentificationguide.pdf

'CF' - Chicago Fasteners

'L' Lewis Bolt and Nut, Colorado

 

[Channel Hopper]

Or more likely the Lone Star Screw Co (Texas)

https://www.electronicfasteners.com/wp-content/uploads/2014/09/northamericanmfgidentificationmarkings.pdf

 

[Channel Hopper]

'JB' appears to be a quality (Grade standard as opposed to a manufacturer.

Chinese Industry Standard: JB, JB/T, JBT -- 219

JB, JB/T, JBT. Quality PDF examples. Industry: Mechanical & Machinery -- Page 219

www.chinesestandard.net

 

[wium78]

What about sand blasting and galvanising?

 

[jeallen01]

Bolt Depot - A useful US site to look up info on US & Metric bolts

Might find useful info on Chinese made bolts here China Bolt Grades, Bolt Grades Manufacturers, Suppliers, Price | Made-in-China.com
NB: "GB" is the abbreviation/prefix for "Chinese Standard" (equivalent to, and often the same as ISO, IEC, EN, BS. etc.)

 

[Manikm909]

thanks all.

today i applied first coat of primer to all the components and pole.

 

[moonbase]

thanks all.

today i applied first coat of primer to all the components and pole.

Just a thought from looking at the picture of the pole, is part of the pole going to be set into the concrete?
If it is, then it might be safe to attach some type of anti spin metalwork to prevent any slight chance of it spinning in the hole over an extended period of time

A couple of holes in the pole below surface level with bolts projecting from them will do the trick.

 

[Manikm909]

All Channel Master mounts that I know of have been zinc galvanised, to a very high quality. Your's isn't and so I suspect it isn't the genuine article.

Did you get a picture of the bolt head before hammering ? It should also have a set of marks that denote the type and quality.

Channel Master/Laminas 1.8m project

I don´t know if could be possible to do something like that for so heavy dish like CM180 is... it is only idea... It's not so much the weight of the dish, its more about the potential wind-loading when a storm whips through your neighbourhood. A 180 dish is like a small boat sail - it will...

www.satellites.co.uk

#521 - exactly same as mine, and rusty - just not so much.

 

[Manikm909]

Just a thought from looking at the picture of the pole, is part of the pole going to be set into the concrete?
If it is, then it might be safe to attach some type of anti spin metalwork to prevent any slight chance of it spinning in the hole over an extended period of time

A couple of holes in the pole below surface level with bolts projecting from them will do the trick.

no mate, the pole slots over an NPRM which came with the deal - the NPRM will then go onto concrete base further up garden on the lawn.

i will be buidling base over next couple of days - the pole on its own, isn't long enough really otherwise

 

[Channel Hopper]

Channel Master/Laminas 1.8m project

I don´t know if could be possible to do something like that for so heavy dish like CM180 is... it is only idea... It's not so much the weight of the dish, its more about the potential wind-loading when a storm whips through your neighbourhood. A 180 dish is like a small boat sail - it will...

www.satellites.co.uk

#521 - exactly same as mine, and rusty - just not so much.

Can't see the bolt head in that picture.

Better this thread for detail on the polarmount origins.

Calling all Channel Master 1.80m Offset dish with polar mount owners.

HI Just received the above .. acquired from a dealer in Spain, but am disappointed with the quality and design of the polar mount. It is very badly galvanized and all screws and nuts are steel. Some parts of the mount are already corroded. I suspect that the polar mount is not made by Andrews...

www.satellites.co.uk

 

[Manikm909]

you've now got me thinking, i still have a 3.5 pole which I could drill through and put rods through and cement in.

i will measure length to see what there is to play with.

how deep would i need to accommodate such a weighty beast...?

 

[moonbase]

you've now got me thinking, i still have a 3.5 pole which I could drill through and put rods through and cement in.

i will measure length to see what there is to play with.

how deep would i need to accommodate such a weighty beast...?

I think the recommended guideline is one third of the pole length in the concrete, two thirds of the pole length above the surface of the concrete.
Obviously, your two thirds of pole length above the concrete needs to be tall enough to give the 1.8m dish LNB boom arm ground clearance for arc extremities (unless you plan to install it inverted).