Well This Just Looks Wrong....

[Spike]

While tinkering around with the Atlas QC-54 I recently acquired I noticed that the auto cross feed knob on mine does not spin when the feed screw is running like all the ones in the youtube videos I have been watching.

I have no idea if I will ever even need that feature but it bugged me enough to take the apron off and take a look. Here is what I found:













I know the pics are horrible but even so you can see that while I assume there is supposed to be a spline inside the sleeve there is none, only a bit of a ridge. To my untrained eye it still seems I found the problem though.

The exploded view I found says the bad part is the 341-051 Mitre Gear. Anyone know where I may get this part? Anyone know if I'll need a loan for it? Thanks in advance!
-Spike

 

[kd4gij]

I believe that should have a key made into it. I looked on eBay and it does not have a key.

 

[Spike]

The part has a spline running end to end inside the bore. Mine is wiped pretty much completely. I found out that Sears offers a new gear but it carries a different part number and I have no idea if it is a match for mine. The page has a good pic though:

http://www.searspartsdirect.com/cra...051/0009/101/model-10128900/0247/0728000.html
They sure are proud of it though. $200 is a bit much for someone else's machine.
-Spike

 

[kd4gij]

Watch eBay. Clausing still carries a lot of parts for the old atlas lathe. And is a lot cheaper than sears. And some times cheaper than eBay. Won't hurt to give them a call.
http://www.clausing-industrial.com/index.asp

 

[Terrywerm]

Is there enough meat left to cut a keyway into the gear hub? It would be worth a try if the part is soft, and I don't think you would have anything to lose. The only problem would be if there is nothing in place to keep the key captive, allowing it to work its way out and jam things up or just plain fall out. I am not familiar enough with that machine to know if it would work or not, but it might be worth looking into.

 

[jpfabricator]

Now you have a good reason to buy shaper to cut the new keyway!

Sent from somewhere in East Texas Jake Parker

 

[Spike]

Since I found the problem I have been researching around the web and have found this is not an uncommon issue. I have found a few different repairs/modifications folks have done to salvage their gears. I'll need to think on it before I decide to tinker too much so as not to make it worse or damage any more of the machine. Thanks for the link and all the advice everyone!

As far as buying a shaper they are way out of my budget unless I run across one so cheap it probably wouldn't run. I last operated a shaper back in metal shop in high school, but I figure I could do it if i had access. Thanks!
-Spike

 

[cathead]

Is there enough meat left to cut a keyway into the gear hub? It would be worth a try if the part is soft, and I don't think you would have anything to lose. The only problem would be if there is nothing in place to keep the key captive, allowing it to work its way out and jam things up or just plain fall out. I am not familiar enough with that machine to know if it would work or not, but it might be worth looking into.

Making a key way and silver soldering in the key would be a possibility. Silver soldering is not that difficult
to do and the strength of the repair would be as strong as the original part.

 

[Billh50]

you could just buy a keyway broach and make a guide bushing for it. Then as above, silver solder a key in it.

 

[BGHansen]

Could you drill/tap a couple of holes in the gear in line with each other? Then run in a couple of dog point set screws? The end of the dog points would run in the corresponding keyway. Maybe an alternative.

Bruce