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Todays Tinkering - Chinese "in Line Filter" Moderators

Discussion in 'Technical' started by Halinfax, Aug 17, 2020.

  1. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Gentlemen... a little while ago, I purchased one of these "in line filter" ....ahherm... moderators as a blank unit from the Bay of Ebe.....

    I subsequently drilled the internal cones out to the specific size as well as the muzzle cap and tried to "rethread the 1/2" UNF x 28TPI thread.....(it ended up double threaded and slack....)

    It was as much use as a kick in the pants..... not very quiet, "metallic sounding" and as for the mounting thread... as much use as a chocolate teapot...

    Well, very recently somebody gave me 2 of these "units" to see IF there was owt I could do with them.....

    Gentlemen... I ask you... "IS the Pope Catholic"?????

    You don't give a Certified and Pathological Tinkerer summat like that and NOT expect wonderments to spring forth......!!!!!!

    Stripping each unit down to its component parts to see what we could use... (basically NOWT except the outer tube and the muzzle cap)... I set to and re-worked these units to something that is somewhere near credible....

    These are the bits as I found them.....
    20200813_131035.jpg 20200813_131133.jpg 20200817_153453.jpg

    and with a little bit of accurate re-working, sleaving and accurate machining, firstly the silver unit......
    20200813_131126.jpg 20200813_131304.jpg 20200813_131311.jpg 20200817_150234.jpg 20200817_150255.jpg 20200817_150144.jpg


    and then the black unit.. (I modified the cones (Air Arms like) but not as good as the baffled silver one. So I will retro fit the black one with curlers and felt to get it quieter..)
    20200817_153453.jpg 20200817_154523.jpg 20200817_155905.jpg 20200817_155915(0).jpg 20200817_161440.jpg 20200817_164911.jpg 20200817_170923.jpg 20200817_173309.jpg 20200817_173317.jpg 20200817_202844.jpg 20200817_202851.jpg



    With a little tinkering they can be made semi quiet and for relatively little cost and work...

    However, at least NOW, both units have full and proper 1/2" UNF x 20 TPI threads, the end caps have been sleeved and removable and all are running concentric.

    I may soon be putting them up for sale if anybody might be interested...

    Thanks for looking...
     
    Crom, Redcap 114, Mopane and 4 others like this.
  2. snipperuk

    snipperuk Minion

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    I was only looking at these the other day.... Correct thread size to
    £16.37 9%OFF | New 1/2-20 1/2-28 5/8-24 6inch-small 6inch-big 10inch Single Core Aluminum Fuel Filter Solvent Trap for NAPA 4003 WIX 24003
    https://a.aliexpress.com/_BOGees
     
  3. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    Very nice work mate:thumb::thumb:
     
    Halinfax likes this.
  4. Arrizabalaga

    Arrizabalaga Forum Poet

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    I've got a couple of these and didn't have a problem re-tapping the threads, it's not pretty but there's plenty of meat left to hold them solidly in place (1/2 UNF cuts deeper than 1/2 UNEF).

    I tried making various baffle configurations from hair curlers and felt but couldn't get much improvement. Do the extra holes in the baffles make much difference?

    Granted they're not wine racks, but they're 6 quid rather than 60.
     
  5. Cpmwasp

    Cpmwasp Well-Known Member

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    Have you measured the db attenuation?
    Ive made my own mods that weigh just 80 gramms, and are dual caliber, designed to work just as well with 4.5 and 5.5 lead, and produce - 18db attenuation. Thats pretty quiet for hunting.
    Just for info, ive seen people dry test a mod, and comment on how badly they work!!! They only work with lead, as they are designed to work with the shock wave infront and behind the Pellet. At least mine are.
     
    Halinfax and bucketboy like this.
  6. bucketboy

    bucketboy Very Active

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    How much do these things weigh?

    Bb
     
  7. Cpmwasp

    Cpmwasp Well-Known Member

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    How much do they affect accuracy?
     
  8. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Heyup BB..

    I weighed the "in line wonder mods"... and heres the outcome...

    1) Standard outer & internals (with the modifications I made) with some stock removal and some delrin inclusion - 130 grams

    2) Standard outer & my internals - 91 g

    3) A "typical" moderator that I make in Carbon (AA 400/410 175xx long x 30mm diameter) - 61 grams

    Which is the quietest.... MINE... without a question
    Which is the lightest .... MINE... without a doubt

    I think that I only tinkered with these units to see "what they were capable of" and as a CHEAP and cheerful alternative.. with some tinkering they could be acceptable to some folk..
     
    bucketboy likes this.
  9. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Bonjour Cpmwasp.... I tried BOTH the units on my PR900 rifle and shot in the garden...with both calibres (.177 and .22) and at 11 yards all the shots were within a 19mm target.. so not too bad I suppose...

    They will NEVER be owt like a HW.. BUT.. for some folk shooting on a shoestring budget... it may be acceptable...
     
  10. Bozz

    Bozz Posting Addict

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    Hi there Hal you are a tinker among tinkerers keep on tinkering till the end of tinkering time, Keep on tinkering, Wish i was 1/2 as good at tinkering. Graham.
     
    Halinfax likes this.
  11. bucketboy

    bucketboy Very Active

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    Thanks, i am surprised, I thought they would be much heavier than that. :thumb:
    Bb
     
    Halinfax likes this.
  12. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Heyup Graham.. cheers mate... I will do my best. :thumb::thumb:

    Time on my hands and an inquisitive and mis-spent youth.... and look at me now!!!!!:facepalm::facepalm::facepalm::facepalm::facepalm:
     
  13. Halinfax

    Halinfax Full time tinkerer and general all round nice guy

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    Hi BB.. yes I agree, but all the construction is ally... outer tube, internal cones and spacers...

    As mentioned, when I got them they were fit for the bin with the butchery that had gone on with them.. but now.. as mentioned.. they would do for a little plinking gun...
     
    bucketboy likes this.
  14. Redcap 114

    Redcap 114 Donator (Les)

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    Nice one Hal,

    A really superb job as usual and i wouldn't expect anythin less. If they are as quiet as the one you made for me, then somebody will be getting a real bargain and a super moderater.

    Well done Sir.

    Best regards.
    Les.
     
    Halinfax likes this.
  15. Cpmwasp

    Cpmwasp Well-Known Member

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    Here are a few pics of my aly version.
    I anodized them and they don't look too bad, or do they?
    I made them from high grade aly and machined them right down but left a thicker front end for mounting a chrono 625 mk4.
     

    Attached Files:

    Halinfax likes this.

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