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Advice on an Internal Acme Thread

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ddickey

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#31
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.
 

george wilson

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#32
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.
 

Wreck™Wreck

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#35
Hey Wreck Wreck, you were right.
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
 

ddickey

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#37
That looks like a c-clip, for retaining or limiting the movement of another part, such as a bearing.
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
 

4gsr

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#38
Its a different style of Truarc retaining ring. It's a medium duty ring as the other was a light duty ring.

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4gsr

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#39
Look up Truarc Retaining rings.

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4gsr

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#40
I'm surprised you got that into the groove, being a medium duty ring.

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RandyM

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#41
Looks like TruArc is now RotoClip.

Here is the link.

RotoClip

Here is the link that describes the purchase.

TruArc Purchase
 
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ddickey

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#42
Well, I'll be jiggered. Looked like an external ring.
Nice to keep learning things.
 

4gsr

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#43
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.
 

ddickey

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#44
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.
 

4gsr

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#45
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.
Check it out. As long as the "ears" don't rub, you're ok.

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