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Thread: 260 ATM Restoration
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25th Apr 2020, 07:20 AM #1Novice
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260 ATM Restoration
This is my first foray into metal work, but have been interested for quite a while and couldn't pass up on the price.
Looks like it may have been run into or dropped, as the cross slide handle is bent and the tailstock is destroyed. The 3 phase motor may be fried as well, but will be checking that later. Some dings on the ways, but the wear doesn't feel too deep with the finger nail test. All gears are meshing well, longitudinal and cross feeds working well with hand cranking.
Does the tailstock look repairable? I rotated the crack to show the damage, but it does fit back in place well.
Any advice and feedback very much appreciated as I am a total newbie. Slowly reading through the Text Book of Turning.
IMG_20200423_131242.jpgIMG_20200423_131333.jpgIMG_20200423_131319.jpgIMG_20200423_131306.jpgIMG_20200423_131255.jpgIMG_20200424_130355.jpgIMG_20200424_130427.jpg
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25th Apr 2020, 07:54 AM #2Golden Member
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I repaired a cast iron bandsaw wheel by TIG brazing it with silicon bronze. Seemed to work well. Sure you could do the same by grooving out the crack.
Nothing to lose. Where are you?
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25th Apr 2020, 08:04 AM #3Novice
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Thanks, I'm in Vancouver, Canada. I don't have have a TIG setup, but it's on the wish list.
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25th Apr 2020, 08:34 AM #4Golden Member
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Ah, a bit far to come to Sydney, otherwise I’d happily have a go for you. See if you can prep the part yourself and take it to a fab shop. Nothing to lose.
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25th Apr 2020, 08:57 AM #5Novice
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That would be quite a trek, thanks for the offer!
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25th Apr 2020, 05:31 PM #6Most Valued Member
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There’s 2 parts to that repair - getting it stuck back together then most likely some machining to get it all cleaned up and working again afterwards.
Certainly within the realm of a home workshop but given you are a stone cold newbie with machining probably not a job you want to start off with.
To get it repaired at a normal engineering shop isn’t likely to be cheap.
Do you have any steam engine or vintage machinery organizations in your area? Possibly they may either have someone who might take on the repair in exchange for a donation etc, or can at least point you towards a business that is familiar with that sort of repair at a reasonable cost.
In regards to prep before you take it somewhere I’d suggest just disassemble, paint strip and degrease as much as possible.
Don’t start vee-ing out the cracked area as you probably won’t do it how the repairer would and may make it worse.
Steve
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26th Apr 2020, 09:26 AM #7Novice
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That's a really good idea! My brother volunteered at the local model railway club previously so may have some contacts there still.
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26th Apr 2020, 09:56 AM #8australian metalworking hobbyist
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26th Apr 2020, 11:15 AM #9Novice
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I did see some on AMH, but it may be a bit cost prohibitive shipping it to Canada.
Sent from my Pixel 3 XL using Tapatalk
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28th Apr 2020, 09:56 AM #10Novice
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Is there any resource that shows the specifications of for things like
-Tail stock taper
-Spindle chuck thread
-Tool post gib size
etc.
Thank for all the help so far!
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28th Apr 2020, 02:31 PM #11Novice
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Started to disassemble the tailstock today. The bottom looks to have even more wear than the ways for some reason. Will this be a problem since the center is now sitting lower than the spindle center? Not sure if I missed a height adjustment screw.
IMG_20200427_191132.jpg
The taper in the quill also looks pretty chowdered up.
IMG_20200427_194056.jpg
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28th Apr 2020, 02:40 PM #12Most Valued Member
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Tailstock taper M/T 2
Spindle thread 1 3/4" x 8 tpi
Are you asking about the gib for the compound or cross slide, the tool post does not have a gib.
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28th Apr 2020, 02:43 PM #13Novice
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Thanks!
Asking about the bottom of the tool post. Was looking at quick change ones, but not sure what size fits.
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28th Apr 2020, 05:13 PM #14Most Valued Member
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Use the AXA type 101 for the quick change , piston or wedge style, the piston type will generally be cheaper. For what the lathe is the piston type will work just as good as the wedge type, you will need to either make or buy a replacement hold down stud to replace the stud Hercus use in their compound.
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30th Apr 2020, 06:42 PM #15Novice
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All the parts disassembled
IMG_20200427_191222_1.jpg
Broken spindle screw. I'm considering welding on the end
IMG_20200427_194155.jpg
Got all the parts soaked in xylene over night. Top layers have come off, but looks like the original green is holding on. I'll try some lye next.
Decided to see if the chuck was stuck, so I put the back gear on and tried the spin it off by hand. Seemed pretty tight so I cut some rubber, bolted some pipe strapping down. The chuck broke free with a gentle tap.
IMG_20200429_164633.jpg
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