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Member postings for Niels Abildgaard

Here is a list of all the postings Niels Abildgaard has made in our forums. Click on a thread name to jump to the thread.

Thread: Under Radar Lathe upgrade
24/01/2020 11:50:47
Posted by Neil Wyatt on 24/01/2020 09:48:09:

Hi Niels,

Have you thought of writing some of your modifications up for an article in MEW?

Neil

Hi Neil

Thank You for maybe finding some of it worth paper publication,but the time from my thinking something to getting some reaction will be far to long via printed paper.

Do You know, by the way, how many minilathes there are out there?

I want to calculate how rich I am before next Weekend selling funny taper roller bearings and strange spindles.

23/01/2020 20:59:17

Many, very many small lathes have two rolling element spindle bearings that are 62mm outside.

Most have Morsecone 3 and 20mm through-bore because middle part of spindle where bearings sit are 30mm.

I have got a very well made WM180 from Kaimac and have put in a homemade spindle using bearings that are 40mm inside, 62mm outside.

Then cameout of the blue on ebay an affordable , similar size lathe with 38mm hole.

I was tempted and fell in and deserved my ponitense.

Quality is lousy and I ofloaded it very cheap after full explanation of ils.

Am still on friendly terms with buyer.

My son has always doubted my sanity and now he fears for his heritage.

He has no need for my beloved Kaimac 180 (that he removed from here) next three months ,as he is renovating house.

He came up with a good solution and that is I get the Kaimac 180 back for rebuilding.

When that is proven a resounding succes I will then be allowed do the same to my very good quality made HBM250 (920 clone) that also has 62mm bearings.

He will then liberate it from this house of known lathe mistreating.

Problem has been lack of an extra lathe to rebuild one.

Now I have two lathes.

The idea is to change as little as possible and maximize spindle stiffness between bearings.

It is my expirience that many younger lathe owners have to be very carefull to drag a new,younger and bigger lathe home.

The Changes I propose can be very cheap.

Sizes once more:

Originall minis have MC3/20mm bore and runs in two 30/62 mm bearings.

My Kaimac mini was rebuillt and have ER40/30mm bore and runs in 40/62 tapered roller bearings.

My HBM 920 clone has MC3/20mm bore and uses 35/62 mm bearings

Both are being rebuilt with 40/62 mm on the far end where 30-32 mm stock can pass and something very much bigger the front/chuck end, but still without doing anything to the invaluable, holy chineese cast iron of headstock.

Active sections of spindles can then be roughly 42mm inside and 50 or bigger outside.

Mini lathe upgrade.jpg

Picture shows standard minilathe left end with 20mm hole and 30mm bearing seat.

Edited By Niels Abildgaard on 23/01/2020 21:09:05

Thread: Lathe improvements?
19/01/2020 20:52:11

The cantilevered bearing scheme can also be applied to my very well made WM250 lathe with its lousy 62mm bearing bores.

Spindle outside diameter can be 55 mm and hole through 45- 46mm.

.

This is better than all other lathes with 62mm bearing holes were it must be less than 40mm.

What does readers think will be max value for mankind?

symmer 46 55 250.jpg

Edited By Niels Abildgaard on 19/01/2020 20:53:00

Edited By Niels Abildgaard on 19/01/2020 20:59:45

19/01/2020 20:34:55

Intention is to copperbraze some almost finished flanges unto some thin-walled steel pipes of good quality.

And then see if my WM250 lathe can make it.My WM250 lathe has the same 62mm bearing holes like almost all other chineese and austrian mini lathes.

Thats to small.

I tried to part of some 100mm steel and that was not possible.

75mm steel worked but was neither easy or nice.

There is really a need for bigger hobby lathe spindles.

The monster WM210/38 bore lathe came with two 45/85/22mm spindle bearings and can then have a 38mm bore.

Slim bearings (32912 or 60/85/17mm) can hold a new homemade spindle with 50 or51mm bore.

It spoils my sleep that I can also fit bearing/spindle set as shown

ultragalimatias.jpg

The lower spindle half is the standard 45/85/22mm bearings and spindle from China.

The upper half shows cantilevered bearings of 75/105/20mm and spindle bore can easily be 65mm.

Edited By Niels Abildgaard on 19/01/2020 20:55:10

Edited By Niels Abildgaard on 19/01/2020 20:57:56

19/01/2020 20:09:21

The sketch from 28 oct was my plan for making a small envelope,oilfield lathe with a spindle bore of 50mm.

I did buy a WM210* 400 with 38mm bore lathe and took it apart.

wp_20191124_003[1].jpg

Quality on spindle and chuck was abyssmal.

wp_20191124_001[1].jpg

I did not throw it on scrapheap but sold it very cheap after having informed him clearly what was wrong.

He lives 20km from here and lathe is running.He have agreed to let me try a bighole spindle if I ever finishes such one.

wp_20200119_002[1].jpg

Edited By Niels Abildgaard on 19/01/2020 20:10:44

Thread: Boxford Lathe Big Bore Conversion
17/01/2020 09:28:26

A picture of standard Boxford

Standard Boxford

17/01/2020 09:18:51

An old thread but I have seen the holy light.

To make a really usefull Boxford ,we can machine a front bearing holder (bearing 32913) as shown and fit it in front headstock front bearing hole that   is bored 3Inch/76.2mm.

These new,slimline bearings have 65mm holes and spindle front part can easily have a 55mm hole.

I hessitated to send Brian the used chineese spindle as I thougth he underestimated the trouble of line boring headstock.

After having seen the holy ligth and I would not have hessitated but it had served no purpose either.

This new illuminated solution is pure lathe work and spindles are easy to make.

If the chucklholder face of spindle is made after assembly in the Boxford , no Schaublin,Hardinge etc will better it.

Please enjoy or critisize.

MegaBox

 

Edited By Niels Abildgaard on 17/01/2020 09:25:18

Thread: Ideal amateur lathe spindle nose?
03/12/2019 18:28:03

My latest 8*16 import lathe spindle phantasy:

Buy one of these.:

38mm bore lathe

 

and two 32912 bearings and make a spindle with 50mm hole and max88mm nose as picture.

You cannot buy suitable 3 or 4 jaw chucks with 50mm hole and is not really needed either.

Everything round up to 38mm is handled with ER collets.

Bigger and square by Harold Halls very nice faceplate /clamp combination.

Overhang is short and bending stiffnes between bearings is 65 for a 30/20mm ,201 for the 45/38mm as bougth and 671 for the ultimate 60/50mm shown.

Spindle Porn

Edited By Niels Abildgaard on 03/12/2019 18:37:30

Edited By Niels Abildgaard on 03/12/2019 18:39:12

Thread: Mini Lathe Upgrade
28/11/2019 12:01:30
Posted by COLIN MARTIN 2 on 28/11/2019 10:16:33:

UPDATE:

after much thought, I've decided that I can only decide after I know what I am going to need!! It is a bit illogical to buy the same size lathe with just a bigger chuck (even though it is a higher spec) without knowing if it will do the job, therefore I have decided to upgrade my existing lathe and see how I get on with that, then go from there.

I have bought a 100mm chuck (on special offer at the moment from Arc Euro Trade) and a pair of angular thrust bearings, which I hope will stiffen up the spindle, and a new spindle with the flange which takes the 100mm chuck. Big thank you to Arc Euro Trade which sent out the parts for next day delivery and Simon at SPG Tools who supplied the spindle and was most helpful.

I was pleasantly surprised when stripping out the spindle and bearings: after reading a lot of negativity about the quality of workmanship on the mini lathe, I found that the parts were pretty well made, although not awe-inspiring like some engineering, the parts are solid and certainly of acceptable quality. I had expected the Chinese bearings to be shot after about fifteen year's use, but both spun perfectly smoothly and with no trace of play, so in future I will have no hesitation in buying Chinese bearings.

Can we see pictures of spindles side by side and bearings?

It will then be possible to construct the ultimate mini lathe spindle and I will be rich on saturday.

Something along these lines

cheapskate.jpg

Edited By Niels Abildgaard on 28/11/2019 12:07:04

Thread: Information and doc on Comet holder and inserts
21/11/2019 08:33:36

Put it in a safe.

It is a small fortune:

Rich on saturday

21/11/2019 05:28:59

Try this

Ifanger

Thread: Alternative Lathe that would fit Myford Ind cabinet for a long bed
19/11/2019 17:27:39

What is maximum length of lathe You can accomodate and can we have a picture of cabinet?

Thread: Warco WM 250 problem?
15/11/2019 18:50:25

A simpler WM250 furniture

housebroken.jpg

15/11/2019 17:28:42

My Weiss Machinery 250 was put on stone and something IKEA.

wp_20190418_003[1].jpg

It turns quite nicely.

WM250 at work

And does not vibrate

Low noise lathe

I would get rid of the crabinet and make a plywood stand instead.

drejerej jpg.jpg

Thread: Warco WM 250 advice needed
14/11/2019 16:46:38

Have just tested it.

90 seconds

14/11/2019 16:31:11
Posted by Tony Pratt 1 on 13/11/2019 18:01:10:

That mod makes the flange less stiff?

Tony

No .

Not when nuts are tight.

If ME can harbour short videos here we can make a contest .

Start with a ThreeJaws in place and secure.

Loosen nuts,take it down ,put on four jaw and secure.

If video is then speeded up say five times it will only be about 25 seconds.

It must then be possible to unite three videos side by side and compare.

Great fun for very few.

Edited By Niels Abildgaard on 14/11/2019 16:51:49

13/11/2019 15:59:12

First operation on my chineese lathes has been to thin the flanges 4-5mm.

This make chuck change less than two minutes routine

End of Warranty

Fat finger help

Edited By Niels Abildgaard on 13/11/2019 16:00:36

Edited By Niels Abildgaard on 13/11/2019 16:02:01

Thread: Ideal amateur lathe spindle nose?
08/11/2019 19:12:58

And for my next 50mm hole spindle something like this

mega.jpg

08/11/2019 19:09:32
Posted by old mart on 08/11/2019 16:47:10:

If you were designing a lathe chuck mounting for a small to medium lathe, the screw thread takes a lot of beating. At the design stage, a positive spindle lock and a locking device for running safely in reverse would not be difficult to include. My second choice would be a variation of the bolt on flange which the mini lathes have, but with more room between the headstock and the rear of the spindle flange. The type with the keyholes in a loose plate has a lot going for it in terms of easy chuck changing.

I think the camlock system is more suitable for larger machines.

Edited By old mart on 08/11/2019 16:50:08

I have come to the conclusion after reading the late,great John Stevenson and having done some practical tests my self, that my chucks will be fastened with three or four M6 or M8 screws from front.

Short and very rigid.

Extreme accuracy by machining spindle register on site

For my former 30mm hole spindle it should have been made like this:New spindle

Edited By Niels Abildgaard on 08/11/2019 19:10:29

Edited By Niels Abildgaard on 08/11/2019 19:31:29

08/11/2019 06:48:29
Posted by Michael Gilligan on 07/11/2019 20:26:54:

This is the general idea, Niels : **LINK**

https://forum.snipershide.com/threads/lathe-spider-chuck.5619/

... effectively, you are using the whole of the spindle like a watchmaker’s bell-chuck on steroids !!

See here: **LINK**

MichaelG.

Edited By Michael Gilligan on 07/11/2019 20:30:42

Hello Michael

That was exactly what I needed to go on with my living room oilfield lathe.

Thank You very much

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