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Advice on an Internal Acme Thread

Discussion in 'QUESTIONS & ANSWERS (Get Help Fast Here!)' started by ddickey, Aug 23, 2017.

  1. ddickey

    ddickey United States H-M Supporter - Premium Content H-M Supporter-Premium

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    I suspect you're correct Randy. Since the screw is a 1/2-10 LH and original is/was 5/8-10 LH.
    I also can see no visible wear in the cross slide screw when compared to the vertical screw.
     
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  2. george wilson

    george wilson United States Global Moderator Staff Member H-M Supporter-Premium

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    Some times you can just turn the lead screw upside down and re machine the ends to work. That is done usually on lathes,but will work on other applications too.
     
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  3. ddickey

    ddickey United States H-M Supporter - Premium Content H-M Supporter-Premium

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    Pulled this out of my spindle housing. Does it look like it doesn't belong?
     

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  4. ddickey

    ddickey United States H-M Supporter - Premium Content H-M Supporter-Premium

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    Hey Wreck Wreck, you were right.
     
  5. Wreck™Wreck

    Wreck™Wreck United States Active User H-M Supporter-Premium

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    I did my best to identify it from the pictures, I'm not an expert in threads but have seen and made a great deal of different threads in the last 30 years.
    Advances in manufacturing technologies over the last 5 decades have made precision acme screws very accurate, commercially available components may work just fine in your application and are far easier to source.

    Making a square thread is a hair pulling experience short of a grinder for this purpose.

    Good Luck
     
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  6. dave_r_1

    dave_r_1 Canada Active Member Active Member

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    That looks like a c-clip, for retaining or limiting the movement of another part, such as a bearing.
     
  7. ddickey

    ddickey United States H-M Supporter - Premium Content H-M Supporter-Premium

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    Sorry I forgot to post the other half of the equation. There are two. They are in the housing for a spindle that carries two bearings. One was broke and I broke the other trying to get it out. Here's the pic with new ones. There is something really odd about the ones I found inside. thumbnail_IMG_20170830_084135393.jpg
     
  8. 4gsr

    4gsr Global Moderator Staff Member H-M Supporter-Premium

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    Its a different style of Truarc retaining ring. It's a medium duty ring as the other was a light duty ring.

    Sent from my SAMSUNG-SM-G920A using Tapatalk
     
  9. 4gsr

    4gsr Global Moderator Staff Member H-M Supporter-Premium

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    Look up Truarc Retaining rings.

    Sent from my SAMSUNG-SM-G920A using Tapatalk
     
  10. 4gsr

    4gsr Global Moderator Staff Member H-M Supporter-Premium

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    I'm surprised you got that into the groove, being a medium duty ring.

    Sent from my SAMSUNG-SM-G920A using Tapatalk
     
  11. RandyM

    RandyM United States Global Moderator Staff Member H-M Supporter-Premium

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    Looks like TruArc is now RotoClip.

    Here is the link.

    RotoClip

    Here is the link that describes the purchase.

    TruArc Purchase
     
    Last edited: Aug 30, 2017
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  12. ddickey

    ddickey United States H-M Supporter - Premium Content H-M Supporter-Premium

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    Well, I'll be jiggered. Looked like an external ring.
    Nice to keep learning things.
     
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  13. 4gsr

    4gsr Global Moderator Staff Member H-M Supporter-Premium

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    Personally, I would put a internal Spirolox retaining ring in there in stead of a Truarc or Rotor Clip ring. Less likely chance of the ears of the Rotor Clip rubbing on the internal portion of the bearing causing unnecessary wear on the bearing.
     
  14. ddickey

    ddickey United States H-M Supporter - Premium Content H-M Supporter-Premium

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    Even with the outer race butted up against the ring. You think there could be a chance of it rubbing? Guess I never thought about that.
     
  15. 4gsr

    4gsr Global Moderator Staff Member H-M Supporter-Premium

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    Check it out. As long as the "ears" don't rub, you're ok.

    Sent from my SAMSUNG-SM-G920A using Tapatalk
     

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