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|
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.
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.
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?|
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?
Edited By Niels Abildgaard on 19/01/2020 20:53:00
Edited By Niels Abildgaard on 19/01/2020 20:59:45
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
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
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.
Quality on spindle and chuck was abyssmal.
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.
Edited By Niels Abildgaard on 19/01/2020 20:10:44
|Thread: Boxford Lathe Big Bore Conversion|
A picture of standard Boxford
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.
Edited By Niels Abildgaard on 17/01/2020 09:25:18
|Thread: Ideal amateur lathe spindle nose?|
My latest 8*16 import lathe spindle phantasy:
Buy one of these.:
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.
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|
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
Edited By Niels Abildgaard on 28/11/2019 12:07:04
|Thread: Information and doc on Comet holder and inserts|
Put it in a safe.
It is a small fortune:
|Thread: Alternative Lathe that would fit Myford Ind cabinet for a long bed|
What is maximum length of lathe You can accomodate and can we have a picture of cabinet?
|Thread: Warco WM 250 problem?|
A simpler WM250 furniture
My Weiss Machinery 250 was put on stone and something IKEA.
It turns quite nicely.
And does not vibrate
I would get rid of the crabinet and make a plywood stand instead.
|Thread: Warco WM 250 advice needed|
Have just tested it.
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
First operation on my chineese lathes has been to thin the flanges 4-5mm.
This make chuck change less than two minutes routine
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?|
And for my next 50mm hole spindle something like this
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
Edited By Niels Abildgaard on 08/11/2019 19:10:29
Edited By Niels Abildgaard on 08/11/2019 19:31:29
That was exactly what I needed to go on with my living room oilfield lathe.
Thank You very much
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