Wanted chaparral skew motor

[Trust]

I do have a OMT from SMW with M4 thread .
the O ring has a ID 27.3 x 1.9 mm
same set fits in a Echostar LNB

 

[subman]

Thanks Trust Thats funny one set of drawings show M3 and the other M4 , I have emailed a few people so hope to find out what they are but it all standards WR75 flange , I may not have to use them if I can get the old ones out but from past experience they will shear off . I wont be using the old corotor or old LNB so best I leave it all together . Because if it shears off I will need a pillar drill to drill it out then retap the hole so best I find some new screws . Depth of screws seems to be 5.2 and O ring size seems to be ok . Yes I would think it would be the size for all WR75 Flange LNBs .

 

[Trust]

look at Learn all about waveguide flanges - Swedish Microwave AB

Ku-band LNA: WR75/R 120, Flange PBR 120 with M4 thread.

 

[subman]

Yes on that page now : This one has M4

 

[subman]

Well I used the pressure jet the other day and its not as bad as I thought it was .

 

[subman]

The update on the O ring and set of screws for a WR75 flange , I bought a set yesterday but it came with a free LNB , All for £10 .

 

[subman]

Well I spoke to soon the O ring that came with the screws and the Ku LNB the other day its to large , I would have thought a WR75 flange would be standard but its clear that its not as you can see from the pictures .

 

[Channel Hopper]

Well I spoke to soon the O ring that came with the screws and the Ku LNB the other day its to large , I would have thought a WR75 flange would be standard but its clear that its not as you can see from the pictures .

I'm sure I mentioned similar in a previous post.

Still, you have a nice LNB for a tenner.

 

[subman]

Hi CH yes about to make a start and I find out that the LNB that came with a O ring and set of screws is the wrong size I thought that WR75 flange O rings were all the same size . Anyway its being returned tomorrow as I want a O ring and a set of screws I may have to do what you said and use the old ones thats if I can get the old screws out without shearing them off .

 

[Channel Hopper]

Hi CH yes about to make a start and I find out that the LNB that came with a O ring and set of screws is the wrong size I thought that WR75 flange O rings were all the same size . Anyway its being returned tomorrow as I want a O ring and a set of screws I may have to do what you said and use the old ones thats if I can get the old screws out without shearing them off .

I'm sure I mentioned similar in a previous post.

Use some quality penetrating fluid and leave for a week, the corotor bolts are Torx from memory so buy a good quality tool that fits perfectly with the tenner you might get back.

 

[subman]

Yes your thinking the same as me remove the elbow with my Torx screw driver after lots of penetrating fluid , I did buy a replacement corotor from one of the other forum members but I want to get this old LNB off first then try the SMW one to confirm the SMW is ok . As for that Free Ku LNB with its O ring and screws its on its way tomorrow back to Hypex the other firm selling the O ring and screw set wanted £6.00 plus £24.00 postage .

 

[Trust]

Well I spoke to soon the O ring that came with the screws and the Ku LNB the other day its to large , I would have thought a WR75 flange would be standard but its clear that its not as you can see from the pictures .

Rubbing in with grease , butter or vasaline that ring let slip it in the groove when tightning the screws

 

[subman]

Sorry but the O ring is a few mm to large for that so I have boxed it all up and it will be returned tomorrow . I would have bought the other Kit for £6 but the PP was £24.00 .

 

[jeallen01]

Very easy & cheap to buy pretty much any size of O ring on ebay - just search for what you want!

 

[subman]

Well I think its a 28.5 diameter as for the gauge I have no idea .

 

[jeallen01]

28mm O rings - 30 Pcs Black 28mm x 1.5mm Nitrile Rubber O Ring NBR Oil Sealing Grommets 709874494921 | eBay
29mm O rings - O RING METRIC 29MM INSIDE DIAMETER X 3MM THICK PACKET OF 6 | eBay
Buy some of each and see what fits, or else measure the thickness of the old one and search for that?
PS: this listing might get you what you want G609P# Premium Rubber O-ring Gasket for Watch Back Cover Case 0.3mm-0.9mm Thick | eBay

 

[RimaNTSS]

@subman If you wish I can send you those O-rings , for sure at least one of them should fit.

 

[subman]

Good Morning Rimants yes please send me a O ring as far as I can see its 28.5 O ring as far as the screws go there 4mm as for depth 4.1 . with a bit of luck I might finish this project but its clear that the UK has very little dealers who deal with these items these days . The dealer does not want the LNB , O ring and screws back in his words he told me to dump it so if any one wants a free LNB let me know .

73

 

[subman]

Ok guys just returned from the back garden and gave the LNB screws a good spray of WD sorry but I dont have any other to use .On my first attempt the screws are seized solid but I will give it a go tomorrow and see how we get on .

Skew motor is also seized solid was going to remove the motor from the corotor but only one screw is free the others are seized solid so if I cant move them its Plan B . Use the replacement Corotor and load that up with the replacement LNBs on that .

As for the old corotor I think that will have to go down the local engineering firm and they may have to drill and retap . As for the O ring and screw size just had a reply from SMW .

Thank you for your email.

The O-Ring dimension shall be: 26.7x1.78 mm (Conductive)

Mounting screws are: 4pcs M4 x 10mm (Millimeter screws)

Best regards / Med vänlig hälsning

Olle Carlsson

Applications & Sales Engineer

So its slow but we are getting there . Many thanks to Satfaca for the Corotor .

 

[subman]

Just when you thought every thing was ready to go we have a new problem the replacement Corotor does not have a Ku band elbow . So I need to find a find a replacement elbow from a old corotor or just find a Ku band Elbow , Any thoughts ?

Or drill out the holes on the flange on the corotor so a screw will pass through and cut down the screw length so you can screw in from under the flange . 2 are ok but the other 2 with need to be cut down a few mm , Any thoughts ?