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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: British or Chineese?
07/09/2020 18:17:33
Posted by SillyOldDuffer on 07/09/2020 17:23:23:

So good luck to Niels, upgrading lathes is respectable. Improving a Far Eastern lathe seems admirable to me, and even an unlikely failure wouldn't be the end of the world. Some jobs need a big spindle, so why not fit one if the headstock is beefy enough? Go for it!

Dave

Thank You Dave

A sketch of Boxford headstock with standard spindle and new with 70/50mm and 160 flange for chucks.

As far as I can measure the bearing boring and seals and traps and what not was made in one setup and it will be possible to put in the new main bearings and hope for concentricity.

monsterbox.jpg

07/09/2020 16:33:42
Posted by old mart on 07/09/2020 15:29:04:

What I fail to see is how the average lathe owner would ever be able to make substancial modifications to his machine without first having the use of a much bigger one to make the parts. An interesting project for anyone simply wishing to tinker with machines, but I have yet to see any of the OP's projects actually being used for their original purpose.

The 180 spindle with 30mm bore described some time ago could have been made on the 180 size lathe.

My wish is to inspire importers and chineese manufacturers to sell kits for upgrading and I have resently seen a complete headstock kit for a 210 lathe with 38mm bore.120£ I think.

The goal at moment is to make a 50mm full bore spindle for a Boxford.

Very handy for british veteran motorcycles in living room.

Boxfords and Allegros (the only secondhand cars I could afford some time ago) share the trait that no tears are wept when they go to scrap.

The max diameter of spindle is 160mm and length about 400mm,so should be within Boxford possible making envelope.

Sketch to follow

Thread: Which Lathe???
06/09/2020 19:56:48

The lathe can also be had with  250*300mm dia and length.

A shame I cannot read chineese and order one

Link removed see CoC

Price is 6800 chineese units or under a grand methink

Edited By Niels Abildgaard on 06/09/2020 19:58:09

Edited By Niels Abildgaard on 06/09/2020 19:59:57

Edited By JasonB on 06/09/2020 20:12:39

Thread: British or Chineese?
06/09/2020 08:47:51
Posted by JasonB on 06/09/2020 07:00:33:

So is the spindle the only deciding factor between the best lathe? Surely other parts of the machine come into it.

Everyone with paved acces to a harbour and deep pockets can buy a better lathe weighing a ton or more.

For pensioners it is more interesting to get maximum swarf removal within a meter width from lathe components ca 80 kg max that can be put in place by two old toads.I am one.

In this sector small diameter spindle replacement is the easy way to improvement.

05/09/2020 20:19:51

Manual lathe users can go to heaven very cheap these days.

Two comrades and I each gave a good month wage to buy a single Myford S7 in 1965.

Yesterday I bought an almost complete Boxford A and a Chineese 916 for 900£ total.

Plan is to rebuild both with the biggest possible spindle.

It can then be answered once and for ever if UK or China made the best lathes.

wp_20200905_006[1].jpg

 

Edited By Niels Abildgaard on 05/09/2020 20:20:49

Thread: Lathe installation
30/08/2020 17:56:23

If the wall is real heavy You can improve everything by only fixing the two front lower corners to the concrete floor and fix the two aft tray corners to the wall.

I had my Boxford fixed that way but principle is better illustrated by second picture

RockFord

drejerej jpg.jpg

Edited By Niels Abildgaard on 30/08/2020 18:00:06

Thread: VP Day 75th anniversary
16/08/2020 10:54:50

People outside USA has been usefull idiots in the 1917 american masterplan of getting total dominance and right to exploit.

Apart from VietNam it has seen no real setbacks.

Is this forum the right place for worshipping defenders of Singapore,drowned in the Atlantic,Australians shoot i Galipolli. etc?

Thread: Boll-Aero 1.8cc Diesel
16/08/2020 10:26:32
Posted by KEITH BEAUMONT on 15/08/2020 20:19:06:

I can see that the shear has started at the root of the thread,

Keith

Look at the last picture in largest browser enlargement.

What happened was that it started to break opposite the thread root.

You can see five or six striations.

It was figthing.

When no 7 overload came all of the rest broke.

It was simply to much.The last part to break was the thread root that had been in compression when the top fought in tension for dear life of the rest.

15/08/2020 15:46:56

Very good pictures when shown in 300%.

If the lower half(or less) moon is part of thread it is a clear case of low cycle fatique starting from backfire overload.

For next try, omit the threading,make shaft a very close fit in web and braze with low temperature silver solder with illegal metal .

Its very interesting so can we see a pictures of shaft end and web again tilted so that ligth is different?

Can we see a picture of the original crank drawing?

15/08/2020 11:34:22
Posted by KEITH BEAUMONT on 15/08/2020 10:18:52:

It has sheared cleanly at the face of the web. When it was silver soldered I let things cool down slowly and did not attempt any further heat treatment. I did leave a .020" radius in the corner of the shoulder..

Keith

Let us se pictures of the failzone.

Thread: Boxford Lathe Dismantling
06/08/2020 13:23:54

Depends.

If it is an underdrive model ,then do not buy or bring 2 or three big gorillas and lay complete lathe on back.

A normal drive model can be disassembled singlehanded in less than half an hour.

A photo will give much better relevant advice.

Edited By Niels Abildgaard on 06/08/2020 13:24:45

Thread: My new lathe a Warco 918
31/07/2020 15:04:57
Posted by Ron Laden on 31/07/2020 14:47:54:

Can anyone with a 5 inch 3 jaw tell me its capacity across the inside Jaws, I appreciate it may differ across the makes but would have thought they would be similar.

I have done a bit of a search in a couple of places and it's coming up with approx 40mm which I find a bit odd as my 4 inch 3 jaw can take 40mm, I was expecting more like 55mm.

A picture of where and what 40mm will open a torrent of wise guy comments.

30/07/2020 12:39:40

Lovely parting off without drama and tears.

What was diameter of subject?trying to calculate feed/rate that is on the low side for my taste.

918 lathes are wildly underated here and go between 250-500 £.Must have one.

29/07/2020 13:50:42

Very nice video.

Next must be a parting off video.

That is where wheat and chaff are sorted.

Can we have some newer information on ideal motor torque,rpm and gearing?

I want it on both axes.

Thank You for experimenting and finding the way.

Thread: Poly-Vee Belts
25/07/2020 16:42:17
Posted by Roger Best on 25/07/2020 15:06:14:

smiley Poly-V belts are easy to stitch, you just lay the wire in the groove and it keeps quiet as it doesn't touch the pulley. Not sure what wire is recommended though.

This is considered an "upgrade" in some quarters as it is quieter than a traditional stitched leather belt.

Can we please have a link with picture?

Have never seen it but it sounds OK.

Thread: Is Iron / Steel endlessly recyclable ?
23/07/2020 13:57:46

My best source of steel is the local farm machine repairer.He buy black mild steel in plate,bars etc for ca 1,3 £ per kg.Made from recycled scrap.

I have seen his bandsawblade destroyed by a short piece of 5mm spiral drill.

Carbide and he was concerned.

It does not melt in furnace and is small enough to defy separation by density.

The people at workshop was told to be carefull when throwing away carbide.

Edited By Niels Abildgaard on 23/07/2020 13:59:24

Thread: Leadscrew suppliers
08/07/2020 11:40:23

These people also has nuts (Mutter) and trapez 16 * 3.

Tr 16 * 3 and nuts

Thread: Boxford Lathe Big Bore Conversion
04/07/2020 15:30:17

I had sworn that I would not allow a Boxford in my house and was looking for suitable WM250 headstock to make two big spindle experiments.

My WM250 machine with MC4 is a very nice machine.

By accident a cheap model A 19509 Boxford saw me and followed home.

It has been in school since 1966 and has seen very,very little  use.

The complete drive system with a 0.5hp three phase Crompton will leave as will all the rotating parts in headstock plus gearbox and (imperial) leadscrew.

The spindle scheme to be tried first is this.The lines are 10mm apart.Bearings 32910 and 32916

simple 32916.jpg

Edited By Niels Abildgaard on 04/07/2020 15:34:47

Thread: My new lathe a Warco 918
28/06/2020 18:08:03

That is an acceptable box of chineese lathe kit You have got there says a man who drove an Imperial Boxford of latest model on scrapheap in anger.

Awesome 918 Lathe ,but why not a bigger spindle?

Put  same kind of motor on the leadscrew and tell us all what size motor.Please?

If You do not need the ultrafine longitudinal feed from gears anymore it will be easy to put in a much stiffer spindle.

It is the gearwheel on spindle that is a little tricky by monster-spindles and very fine feeds.

Edited By Niels Abildgaard on 28/06/2020 18:09:10

Thread: Under Radar Lathe upgrade
26/06/2020 19:48:39

Design for improving lathes with 62mm bearing holes.

There is a scrap headstock not far from here but the owner want silly money

total stikleje.jpg

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