Member postings for von dutch

Thanks for the advice guys it’s a bit clearer now,will probably go with machine dro and get magnetic scales.

Ah right I see that’s more than enough for what I want,anybody have any views on glass or magnetic scales then?

That’s interesting thanks for your reply’s guys maybe I’m being overkill with the 1um scales then,so am I right in saying a 5um scale will measure to .0003” or thereabouts? The magnetic scale is lower in profile than a glass one,any thoughts on this or the front or rear mount?

Hi fellow enthusiasts I want to put a dro on my naerok mill.I’ve looked at various options from the cheapest on eBay (£250 all in no/little support),to a complete kit from machine dro which I’m leaning towards as they’ve been the most helpful so far.Can anyone share there experience/advice also I’m led to believe 1um scales are worth the extra? Do people agree?Also was debating the whole putting the scale on the rear of machine so looking for slim scales,but then there’s another school of thought to put it on the front?I am wanting to put a power feed on later but will make this myself.Any advice greatly appreciated.

Here are the numbers of the bearings I removed from my spindle

lower bearing:Ntn 4T 32007x Japan Mm

Top bearing:Ntn 4T 30205 Japan Lm

I replaced these with like for like,Ntn is a premium Japan bearing manufacturer and thought these more than adequate for the mill,even though others else where talk of putting in higher spec.I removed the bearings at work on an arbor press,but reassembled the new ones at home in garage with a bit of forethought and the freezer and pinching a spot in the oven in between the mrs making her cakes!

I have just recently replaced the bearings in my Naerok mill drill they were relatively inexpensive I think around £40 with postage for the pair I will have the part numbers at home(currently at work) will post here when I get home.

Good to see your report Kim,incidentally does the manual cover much in depth?,does it tell you the t nut size for the table slots?

Mine is badged “Naerok rdm400m”,I have found a lot of information on various forums and I downloaded a light manual for it from this forum.I also bought a “generic” manual from Tony on lathes uk site and it is very informative but really for the warco and rf 30 round column mills.There are similarities but would be nice to find a specific manual if there ever was one.Yes I’m excited to do lots of mods to mine to improve it,I fitted a 12v power feed to my myford lathe using a wiper motor and made the pulleys.One thing I’m gonna do first I think is make a power feed to move the head up and down,I can’t make my mind up though to either use a wiper motor again,or go down the stepper motor route,later I want to make power feed for x axis as well.I’m leaning towards stepper motor idea(although I have no experience with these!),coz maybe if I want to move column to final position,I think you can turn motor by hand with no signal.Maybe ha ha I dunno need more research.Yule tide blessings all.

Interesting to know Kim,did you get a manual with yours?

Yea I agree with that,off to find some decent beginners milling books now,first project is making tee nuts for the lovely old English vice I purchased.

Ok took spindle back out of machine and adjusted the preload,that and locking column,quill and “proper”! Tightening of draw bar cleaning spindle taper and making sure grub screw in r8 taper wasn’t deflecting collet chuck I achieved a respectable .0002” runout.I added this post as to help another beginner like myself who may search a similar thing. Thanks again all for your advice.

Thanks all for your advice and input.With a bit of investigating it may appear I have not enough preload on the bearings,I’m going to remove the spindle again tighten them some more and recheck back in the machine,whilst tightening the draw bar I noticed I could still deflect the spindle by .001-.002” on the clock you could actually see the top of draw bar bolt move.New machine and learning curve!

Hmm I see,so what would an ideal runout be .0005” or less?

Checking runout on end of spindle and also up in r8 taper

Bearings are brand new just fitted/repacked with quality grease.Tested runout of spindle on vee blocks when out of machine it was .00005”/nothing.using a .001” per graduation dial,I will admit I’ve been running the spindle whilst doing check which may contribute to needle dancing a bit,maybe I should check runout rotating spindle by hand?,and yes my next steps were to sut some metal!

Hi all , recently purchased a Naerok mill drill for the garage,currently going through it and checking it all over.I decided to replace the spindle bearings as not knowing there history and they also were “notchy”,the spindle runout is hovering around .001”,is this acceptable helpful people?,can it be bettered or is this the norm for said machine.Also the dti is jumping around a bit indicating some vibration,I wondered if the sleeve bearings above the spindle need looking at?Anyway any help advice greatly appreciated.

Yes I think I will replace with a proper vee belt,I can change the chipped bull gear as well while I'm there.Thank you for everyone's input.

It is a megadyne a section link vee belt,when I installed it I ran the lathe for various jobs but it did stretch quite a bit,I had to remove several links,and even then still it will slip under moderate load,I did adjust the tension to compensate but I "feel" it was to tight and putting strain on the pulley bearings.It appears to sit ok in the pulleys,I can't say it's completely oil free in there as there are various oiling points above the belt.It was on my list to replace with a standard vee belt,but I was putting it off as you have to remove the spindle and pulley shafts etc to do job 🙄(lazy I know)

I have been considering putting a standard vee belt on I've had to take a lot of links out of the sectional belt and even now I still have to run it tight and it still slips.pretty pants that,any appreciable cut I put on and it slips/stops the chuck.It did have a good review the belt but isn't cutting the mustard me thinks.

Plus I agree I don't think I ever once used power feed to part off in my apprenticeship or was shown .