Link: Naerok RDM-350M Mill Drill Manual and Exploded Views

[Russ BParticipant @russb]

I recently purchased this on behalf of my employer and as we keep our manuals digitally, I thought I'd share a copy here as there are none online. Hopefully once enough people have it it will be easier to find once the inevitable digital decay renders the below link dead! I will keep a copy obviously so if you cant get it below, get in touch.

**LINK**

The Naerok mill/drill is quite significantly different from today's Mill/Drills.

The most notable difference is the mill head does not slide up and down the column, instead it is fixed and the column slides through the base.

Having purchased and serviced/refurbished 5 or 6 of these round column mill/drill machines of all sizes, I can tell you this one is of a good solid quality similar to the original Rong-Fu machines of the 80's, the leadscrews have roller bearings and overall are of nice solid quality, the castings are much finer than found today. Another example is the belt tension system which is the same, but rather than just pushing the motor with one hand, (which makes it a fumble to then hold it and tighten the motor mount) a lever on the side operates a piston that pushes the motor mount out and tabbed screws make it a simple operation. This is just one example of little luxuries that you don't see anymore, no doubt due to over competitive pricing.

Rong-Fu are still going strong and make their version of the mill/drill machines and a whole load of others but I'm not sure if they're the same quality or perhaps if other copies are on the market too.

[Russ BParticipant @russb]

[larry PhelanParticipant @larryphelan54019]

Never came across these machines before,but they look like a fairly solid job,no gimmicks.

[Ian S CParticipant @iansc]

Thanks for that Russ, some sight differences to my Rexon, #3 MT instead of R8 in the spindle, but 100 % more than the nothing I got with my mill.

Ian S C

[john fletcher 1Participant @johnfletcher1]

I have Naerok RDM 350 and have had it for more than 25 years. I got a manual via Grizzly with exploded view etc. I have carried many modification to mill/drill. Power table feed using a car window up/down motor, digital speed read out as I fitted a 3 phase motor and inverter, done away with the belt system altogether, now using a single link belt, made and fitted flywheel which fits below the front pulley, LED lights around the R8 spindle. I'm thinking of fitting ball screws in the future. Way back in 1990 George Turner wrote a series of articles for Model Engineer magazine on modification he had carried out on his RDM 350. I kept the articles so if any one has one these mills and would like a copy of Georges Mods I can supply it. Very happy with the machine.John

[Russ BParticipant @russb]

IanSC, I was disappointed with the R8 spindle, I thought it was MT3 which would have made for nice cross compatibility with existing machinery/lathe etc but never mind, it's still a superb machine for our little odd jobs and modifications. I think they were sold with MT3 or R8.

We have a Pinnacle drill press at work, and that's made by Naerok, I think I've seen a Rexon and that looked the same too, I'm guessing they're all made by Naerok (now out of business I think, no doubt lost the price war against Rong-Fu)

John, I've sent you a private message regarding the mods. What model Grizzly has this type of column raise/lowering arrangement.

[Martin Hamilton 1Participant @martinhamilton1]

I have had an RD350 mill for around 25 years & have been very happy with it. I bought it second hand. Mine has an R8 spindle & came with a nice GEC 1hp ac motor.

[Russ BParticipant @russb]

For Charlie, and anyone else missing their spindle speed sticker – it isn't actually in the manual, perhaps it depends on your motor?

I haven't verified that my motor is original, or that these are the actual speeds, my RDM is still in a shipping crate on my to do list at work.

Here's a link incase the below ever stops working – as they eventually tend to.

https://www.dropbox.com/s/unui0l9uomeo5u6/Photo%2007-03-2018%2C%2016%2002%2008.jpg?dl=0

Edited By Russ B on 07/03/2018 16:16:15

[KWILParticipant @kwil]

Never understood why this name is Korean, backwards.

[Terry McCarthy 1Participant @terrymccarthy1]

Hi Russ, wondering if you are able to advise with regards to tensioning the belts. We are having difficulties with our Drill having been stripped down before he bought it and needing the belts re attaching.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Russ B on 07/03/2018 16:14:39:

For Charlie, and anyone else missing their spindle speed sticker –

.

For the convenience of anyone who needs to re-create the sticker: I have taken the liberty of adjusting the perspective a little.

MichaelG.

.

.

P.S. … I have absolutely no idea why my Album photos have started being filed with ridiculously long names.

[Russ BParticipant @russb]

Posted by Terry McCarthy 1 on 04/11/2019 11:11:31:

Hi Russ, wondering if you are able to advise with regards to tensioning the belts. We are having difficulties with our Drill having been stripped down before he bought it and needing the belts re attaching.

Terry what do you need help with exactly? Ive recently fitted new belts to mine (at work) they're a tad on the tight side and not quite the right section but they do the job, I could advise on what I'd order instead i(for £2 odd they cost I might just reorder as mine do slip a little on the lowest speeds.)

[EmgeeParticipant @emgee]

Posted by john fletcher 1 on 25/01/2018 14:17:23:

I have Naerok RDM 350 and have had it for more than 25 years. I got a manual via Grizzly with exploded view etc. I have carried many modification to mill/drill. Power table feed using a car window up/down motor, digital speed read out as I fitted a 3 phase motor and inverter, done away with the belt system altogether, now using a single link belt, made and fitted flywheel which fits below the front pulley, LED lights around the R8 spindle. I'm thinking of fitting ball screws in the future. Way back in 1990 George Turner wrote a series of articles for Model Engineer magazine on modification he had carried out on his RDM 350. I kept the articles so if any one has one these mills and would like a copy of Georges Mods I can supply it. Very happy with the machine.John

One of those mods will be the speed increaser, well worth the effort for very small drills.

Emgee

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