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Rockwell 25-100 Lathe Resto

S4cruiser

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I'm planning to use this thread to document the cleanup/refresh/restore of my Rockwell Metal Lathe 11"x 36" model 25-100. Serial #1450825 which puts it in the 1967 date of manufacture.

Some background:
I stumbled across this lathe a month or so ago while purchasing a lot of older drill presses. A semi local furniture manufacturer was cleaning out some old machines and I was lucky enough to get them. While there loading the presses, I inquired about any other machines they might be preparing to list (always try to ask the question even if I have no money to buy at that point).

There was a South Bend heavy 10 near the presses that I was super interested in but ended up already being sold to an employee (which I think is a super cool benefit employers can provide to their folks). He mentioned there might be other lathes elsewhere and would check for me. After finding another guy, they took me to a storage area with a bunch of old retired machines...lots of cool stuff! That's where this Rockwell lathe was sitting, tucked back behind a bunch of other stuff.

I wasn't that interested at first, not knowing squat about Rockwell lathes and still being a little bit bummed the SB was already sold. Left it as I was semi interested but wanted to do some research and interested to hear how much they wanted for it.

Week goes by and after my research, learned that Rockwell lathes are highly regarded from a hobbyist perspective and in some cases are more stout than SBs, etc. They also seem to have a following in the gunsmith space. One important downside is the lack of parts. Also heard back they only wanted 500 bucs for it...which I wasn't in a place to accept over the phone since I hadn't done a detailed inspected.

Yesterday I had a chance to make another trip and inspect the lathe. It ended up being in really good shape minus the years of experience (grease) covering it. Both the back gear and bull gears are undamaged...this is important due to the lack of parts. It's also been painted a couple times during it's life, but that should be an easy fix. Not too much tooling was included other than cutting attachments, etc. but the main parts are all there. I easily handed over 500 bucs and 30 minutes later I was loaded up heading home.

I plan to work on this during the winter, disassembling it part by part, cleaning, repainting, wiring to a VFD and then learning how to use it. I'll document my prgress here. It might be a couple of months until I make enough room to get it unloaded and into the garage.

I've also included a list of 'wanted' items and will update the list as I come across specific parts. If anyone has any of these then please shoot me a PM.

- Factory knob for the Forward/Reverse feed motor
- Milling attachment
- Steady rest
- Follower rest
- Taper attachment
- Factory light/lamp

On to pics!!!!!
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larry_g

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You have scored there... For the switch knob I believe that you probably have a regular drum switch there and buying a replacement drum switch will get you going. However if you plan on the VFD then that switch will not function as it used to because the VFD inputs will replace that switches old function. Do your research to confirm that you want for a F-O-R switch there and what requirements the VFD needs. A drum switch will do the job, but a simpler switch will also do it.

lg
no neat sig line
 

EdT

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Looks like a nice machine from what I can see in the pics. I looked at one of those several years ago, but I didn't end up with it. IIR the weak point on those machines was something to do with the mechanical variable speed drive and, as you've noted, parts in general. Since it sounds like you're just starting off on this kind of thing, you might see if it works the way it is and not jump right into VFD drive. If the existing drive is toast, then that makes sense rather than fixing the problematic mechanical drive. I have two old SBs. A 9" "C" model and a heavy 10 "R" model. I've had the 9" for about 55 years and the 10" for about five although it's WWII vintage. I am what you might call a serious hobbyist. I make a lot of stuff for other folks and use both machines several times a week. The "so what" of that meandering is don't get too hung up on variable speed. I am a pretty conservative machinist and I find that I don't change spindle speeds very often. If you're running a real production shop, then you want to optimize speeds and feeds, but as a hobbyist it's not as important and slower is OK. Too fast will break stuff and burn up tools, too slow will take longer and may give some surface finish issues, but, generally, you will eventually get a part. Good luck with the restoration. I had fun doing the big SB and need to go through the small one someday (which will probably never come).
 

willy (traer)

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I have one just like that. Bought it because it was a good deal and always wanted a lathe. The very next day a found and purchased a much much larger Lodge and Shippley that I dont know what I would do without now :) I've never ran the Rockwell (3 phase which I dont have) so I dont know much about it other than it is all there with the exception of the steady rest and no taper attachment. VFD would make things a lot simpler for you as stated before me! If you need other parts or a whole machine - let me know :)
 
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S4cruiser

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Larry thanks and makes sense on the VFD vs drum switch. I would likely as you said use the VFD for forward reverse, but would like to still have a factory switch from an aesthetics standpoint.

Edt yep, the variable speed function can be finicky and (from what I've read) needs adjusting from time to time. You can see from the pics above, someone jerry rigged the handle on this one with a wire vs adjusting. I'll need a VFD regardless as its a 3 phase machine. Good to know about needing speed changing etc. I'm a super newb when it comes to machining so I'll be learning along the way. I find the biggest enjoyment from taking the machines apart, cleaning them and then using them to assist in restoring other machines/vises.

Willy PM incoming to see what parts you might have!
 

pegabby

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Mar 24, 2017
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Does anyone know where i can get a parts or operation manual for the 25-100 lathe, mine seems to be newer than this one, mine has a crank wheel instead of a lever to change the speed. My free spin lever is stuck, and clutches don't adjust speed, i need a little direction so I don't break some parts i can't find.

Thanks for all your help! :beer:
 

Tcvarner

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May 28, 2017
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How is the Rockwell restoration coming along? I recently purchased the same lathe along with a Bridgeport mill and am getting them set up in my shop. Both are pretty complete but need a stead rest. I'd appreciate your input on where to start looking for one. Thanks


Sent from my iPhone using Tapatalk
 

kdiekemper

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Nov 2, 2017
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I have the same lathe, but already setup for 220, single phase. The lathe does run, but needs a lot of cleanup and getting things moving better. It was my fathers, whom passed a few years ago and I finally brought it home to work on.. He hasn't used it for years. The variable speed doesn't engage with the lever. I can speed it up, but after going to far it bogs the motor down. I haven't taken it apart yet and plan this winter. Not concerned about painting or anything, just want a working lathe to do some projects. I have a manual for the Rockwell 10, which is close, but can't find one for this lathe the 25-100. Any idea's. I know it's hard to find parts as well and must be off old machine. Any way you can still get bearings for this thing? Thanks and will attache photo's soon. Appreciate the help.
 

sbosecker

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Well I might as well pile on as well...

I purchased a Rockwell 25-100 11-inch Metal Lathe off Craigslist for $200 about 3 weeks ago.




20171101-07.jpg

I'm slowly getting it taken apart to evaluate whether it's a parts donor or a potentially working machine. At this point I'm starting to think that I can make this thing into a usable lathe without too much effort.

Interested in comparing notes with others on these machines.


Best regards,

Scott
 

karoc

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Scott is it a keeper if not I like to purchase few parts from ya.I just pick up same lathe but mine has few issues.Dang I can't find a manual for this lathe,person would think that one would be floating around someplace----karoc
 

GLTHFJ60

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Haha, ended up buying this lathe not long ago. Working on a restoration, and buying some parts it desperately needs. The main wheel gear on the apron (interfaces with bed rack for moving the carriage up and down the ways) is worn out badly and needs to be replaced, as is the cross slide nut.

Excited to get this thing moving! Going to eliminate the drum switch and go to full VFD control.

ZkvWuJ5InZcu6SAxJ5j3RR23XBG_ol2QYpnf9Pe_lQXdE2G182Kr2DTmJA5cezAkQTezTkd1MiG1H4H2zJ0RjOMIsm9OHt2-adVmwJIKQaQWyhTvReadg-D9F4OQb6ad4KfGCeh0avYORAYq7M53ZH952j-njVYFcqSrf3I-DsJ1mYtrhy2Cg3my3948UjgwqgM6ELqkWE1H0vYQ7wIDsvz5MfBvJP8o_713QjTYYm40Cue38jc7G_4rRDSaxVgGtDGdA4c04W129vR85Ae-rtNAYmjHFsX9fHoo4kXM8rIQXOUenwmZ0FzuUfq1bqK0eD6oBDs4NgX2clTqoGPdLtFQU0v9tfebloFF4qORZ-K3kkVIVXYxTtPU_Ibgp5H-OtawkUIiH-htS_LcU65f0M7x4T5zmBO5W-s_rp5fMkvZy6gbnv9zCxiCaEFGO2gXy6VbWFciyOkJ5R7PSgx-k2vieNQivnhEtkDjAdtOOB0cAM6YemHRJYQDLYwOfCzbMl7BqbfzM2Vfxzmz0w34iV9PpCN5UNI2xy9hcoBIu6QOo6aClcGapAEG0eEX_GUw26KrXa6I-CprrHIB0MjNxz98BNhqq8QxM3Z-UNQX=w1278-h948-no
 

GLTHFJ60

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Lots of hours invested in cleaning. Have the bed and pan about 95% cleaned of grime and chips, using a combination of engine degreaser, purple power, brake cleaner and elbow grease.

Worked on the chuck last night. While it moved, it was really tight. Pulled it apart, cleaned it up with a wire wheel and slapped it back together with fresh grease. Looks and works a million times better now. Still tight (as it should be), but much smoother.

Manual for future reference:

http://vintagemachinery.org/pubs/698/17153.pdf

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Some staining is present, but everything is nice and smooth now:

Qr5U1InZSQvtQmey4r7swAXjHjBBO8cSFKPNBStv2LYipzKJLI4qnNsOajUa6rQkK2YbE2uBMx9YtJXK2n1WlMR1Dw5m1uuUnKFwThyPiQyj6l1RFm_AMPqwvpR9UvyCfAPnfCwlAkMyCeA_eNifDp--7T8ytVzzyhqZZPF4tK8r-n2_v7mGMEOU9Z0hQ_UZ7HtP2dWhtj5yAAjxQ2dLxUQ7QGL9jcq0lwSWeJLFsvyLI4ykSMjSy5EJh3KeqQHy-Cq07dMaE3IfpgWEs8m2Y7bq-1nWusyLRva0s6hMFGsgIZDiUCiu30_zqHxgL18_C9HOgitRlgtK298TI8Fii_SHoqaThZyiy2l2kFIK98cQQBRESrtfIIa_in1gJU8UrB8hoKLIrMLHvb0a-PfHkjTnfQnQZORSUqULv4mZ3tkIECRj-j_dZ9ZyTwR1Pn0x-1a5B26KRsV41Xl4Wf3ZIPEzvJ302n0B_N8XLxt5RpQnVIRapxi1czvAlTOte2cgzEgt8VAQZ2pppPTR-jo6hK3GSO37zphaRkkm4seR9TiAAuR_NSrdNZ4zfrRbOeayANWKwvBYZIh4W0abJdujQTz9AbJvebVLljbcNjbd=w1278-h948-no
 
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S4cruiser

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Nice work so far Johnny! Looking forward to watching the refresh.

To the others that posted comments above...sorry I never responded. I guess the thread alert emails got turned off somehow.
 

karoc

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I will also be following along,I am doing the same as you but mine is badge as Delta which I think the VS setup is little different.As for the nut if your talking about P#411Feed Screw Nut Keith over on OWWM is making a nut for his lathe.
He said he is going to make couple more which I have my name on one of them.Keep the pics coming sure looking good
 
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GLTHFJ60

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I will also be following along,I am doing the same as you but mine is badge as Delta which I think the VS setup is little different.As for the nut if your talking about P#411Feed Screw Nut Keith over on OWWM is making a nut for his lathe.
He said he is going to make couple more which I have my name on one of them.Keep the pics coming sure looking good

Have a link?

The gear I'm referring to is not the split nut, which interfaces with the power feed screw, but the carriage traverse gear, that interfaces with the rack attached to the bed of the machine.
 

karoc

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Sorry I misunderstood,it the nut for the cross slide,that connects to the taper attachment where those two jam nuts are on the end.This pic is mine as you can see the screw is worn out and the nut is in same shape.
 

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karoc

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Here's a pic of what the guy made which one of these has my name on it.
 

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GLTHFJ60

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Here's a pic of what the guy made which one of these has my name on it.

Gotcha! I need one of those cross slide nuts too. Was going to buy one from eBay.

Keith Rucker, right? Have a link to where he is making these, or offering them up?
 

karoc

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Na not that keith but another,here's a link to his project which is very good for people like me who don't have a clue.Plus he has pics posted of what it took to make those nuts which he is going one step further making them better than original.Anyway he is my source for information http://www.owwm.org/viewtopic.php?f=77&t=182770
 

karoc

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Good morning guys,any progress on ya'll lathe?Mine is kinda at standstill,I am repairing some shafts for the QCGB so waiting on couple items to show up.I got every workbench full of parts so can't start nothing else till start putting something back together.
 

GLTHFJ60

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Got the VFD in on sunday, figured out how the machine was wired, and got the lathe running! Even made some chips.

Still waiting for the leveling feet to get in, and still working on cleaning, so I can get it pushed back to its home.
 

karoc

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Those VFD's sure are nice,change speeds just with your fingers no changing belts are adjusting anything other than a knob or button
 
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S4cruiser

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Got the VFD in on sunday, figured out how the machine was wired, and got the lathe running! Even made some chips.

Still waiting for the leveling feet to get in, and still working on cleaning, so I can get it pushed back to its home.

Need pics!! Or I could drive across town and see for myself :lol_hitti
 

GLTHFJ60

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With the lathe's variable speed drive, I really don't need the variable frequency part of the VFD, only the phase converter part. I will like to set up switches for on/off, maybe some other stuff, not really sure yet. I do want to eliminate the drum switch someone added in lieu of the factory drum switch.
 

karoc

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You can do all that with the VFD,just set the lathe up for the highest rpms then let the VFD do the rest.You can eliminate your starter and your drum switch.You can reverse rotation using the VFD.The VFD also offers protection for the motor for that just in case moment
 

GLTHFJ60

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I know, I'm aware. I have a VFD driving some fans that I set up with a potentiometer and remote on/off switch. The lathe's variable speed belt drive gets me from 25 spindle RPM up to ~1500. Plenty of range from that, and it works great, so I'm going to use it :p

The lathe will have the VFD mounted on the wall with fwd/reverse and on/off switches. I think I will need to upgrade the VFD from a 2HP unit (lathe motor is 2hp) to a 3HP unit, because I occasionally hit a current limit condition when spinning up the lathe at 60HZ. Pretty frustrating.
 

validius

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You can do all that with the VFD,just set the lathe up for the highest rpms then let the VFD do the rest.You can eliminate your starter and your drum switch.You can reverse rotation using the VFD.The VFD also offers protection for the motor for that just in case moment

This is a bad idea for two reasons:

  1. The motor looses power as frequency decreases.
  2. The motor is almost certainly not inverter duty. As a result it will run hot when run at reduced frequencies under heavy loads. If this was a unit with discrete gearing the correct approach would be to determine ranges of speed achievable within narrow frequency ranges around 60hz in the different gears and write this down.
 

karoc

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Yahoooo,guys my threaded rod for the lower slide came in with a brand new nut that fits perfectly so I am now ready to go to work.This has been a very good weekend for my lathe
 

karoc

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How are you coming on your lathe,can't remember if you were taking it down to the last screw or just going to get it running.Have you hit any snags,I am looking for couple gears which I am watching ebay to see if any will popup.But I am making some progress.I started the lathe up about week ago and it seems to run pretty smooth so far.I wish my bed/cabinet was the size your lathe,but just checking in.
 
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S4cruiser

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Was over at Johnnys house last weekend and the lathe is up and running but he hasn't done a ton to it other then cleaning, wiring, putting it through its paces, etc.
 

GLTHFJ60

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^^

After buying the lathe and starting to get comfortable with it, I bought a mill :p

Plan to wire up the lathe again soon, and have a number of projects lined up for it.
 

jtmcclain

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Aug 31, 2013
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One thing you can do with the drum switch is run the low voltage for the VFD direction through the drum switch, that way you can use the drum switch to switch forward and reverse like it was originally used for.
 

bullnerd

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For you guys running vfds, how do change spindle direction quickly?

Like power tapping or other processes where you have to switch quickly?

I always used the drum/buttons to reverse instantly.

If you have to look at a button its too late! lol!
 
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