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Member postings for John Baron

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

Thread: Experimental Vibration Analysis of a WM280 Lathe
24/05/2020 21:13:25

Hi Dave,

Could the "44" be the 44 Khz audio sample rate ?

Thread: [Project 5] Low Profile Table Clamps
24/05/2020 20:49:28

Hi Guys,

I'm sure that I posted pictures of my fly cutter on here recently, but anyway...

new_flycutter-1.jpg

The cutter is a but of 1/4" square HSS. Its symmetrical so both ends are ground similarly. The shaft is 20 mm diameter and the body is a 20 mm thick stainless off cut from a 75 mm bar. It cuts just over 2.5" diameter.

Thread: [Project 3] Dickson T1 Tool Holder
24/05/2020 20:39:05

Hi Lee, Guys,

A 90 degree HSS or Carbide countersink will easily cut those "V" slots. The reason I said to take it easy with the cut, is that the shaft size on some of the counter sink bits may only be 1/4" diameter. As are some of mine. I have a nice six flute one that would do the job at full depth because it is on a 20 mm shank and is only 25 mm diameter. I've got that one in a plastic handle and use it for deburring holes.

Thread: Advice on lathe Threading tools
22/05/2020 20:57:43
Posted by old mart on 22/05/2020 20:52:12:

That handle will make all the other Myford people green with envy. You will never get me to post a photo of the one I made.

Oh go on ! It can't be that bad if you still have and use it.

That wheel came from a scrap yard just for the price of taking a bolt out of the hub and I kept the belt. Handy keeping a mover in the boot.

22/05/2020 20:33:29

Hi Guys,

I made my lathe winding handle from a scrap plastic drum pulley from a old front loading washing machine. I made a revolving handle and screwed it into one of the spokes to make it easy to turn.

The collet is similar to the one in the drawing above.

21022015-00.jpg

21022015-01.jpg

21022015-03.jpg

21022015-05.jpg

There are other pictures in my album.

Thread: Removing nylon plug from carbon fibre tube
22/05/2020 17:55:53

Hi Sam,

When you mentioned how light the mast was, I thought that it was going to be thin, thinner than 4 mm anyway.

I would try my first suggestion since you now have a threaded hole there.

Thread: Mild steel wheel blanks
22/05/2020 17:51:54

Hello Mike, Guys,

I treat laser cut edges the same, similar to machining cast iron, you have to get under the skin ! Once you do it tends to machine easily.

I agree with John Haine, annealing them will work.

Thread: Removing nylon plug from carbon fibre tube
22/05/2020 16:53:09

Hi Guys,

Two things occur to me, assuming that you cannot get the plug to come out at all.

You have already drilled and threaded an M12 hole and said that the tenon is out of place ! It would be entirely feasible to make a screwed in piece to replace the tenon completely and use a thin washer to allow for alignment.

Or

You could remove as much of the old plug as possible by filling in the threaded hole that you have made, then using a hole cutter remove the bulk of the plug which should allow the remains to be extracted. It may be wise to tightly wrap the carbon fibre tube with something so that it cannot expand or crack whilst prising out the, what now should be a fairly thin wall of material.

A further thought is could the CF tube crack when putting in the new plug ?

Just my 2p worth.

 

Edited By John Baron on 22/05/2020 16:55:48

Thread: Internal threading question
21/05/2020 20:00:31
Posted by pgk pgk on 21/05/2020 09:05:54:

I'll first admit that the only internal thread I've cut was a 1" thread as practice following Toms Techniques Youtube vids when I started playing and using a hand ground cutter. A smaller internal hole with a tight tool and I think i'd cut it away from the chuck with inverted tool to make it easier to check clearances and place the tool before each run.

pgk

Won't that cut a left hand thread ?

To cut a right hand thread the tool needs to be the right way up and the lathe spindle running in reverse with the feed away from the chuck. I have to cut a thread into a back plate for a new chuck.

Thread: A polite question - from a beginner :) Drilling a NONE wandering hole
21/05/2020 18:57:32

Hi Guys,

A really good site for drill sharpening information is "Gadget builder"

https://www.gadgetbuilder.com/DrillSharp.html

He has a number of things on there for sharpening drills from mini to maxi. I built his four facet drill sharpening tool. It is my standard goto drill sharpener. There is a picture of mine on that page.

Thread: Removing nylon plug from carbon fibre tube
21/05/2020 18:49:53

+1 For the slide hammer !

Thread: Power feed - 'which motor shall I buy'?
21/05/2020 18:37:47
Posted by Robert Atkinson 2 on 21/05/2020 13:29:25:
Posted by John Baron on 21/05/2020 10:23:19:
Posted by Robert Atkinson 2 on 21/05/2020 07:40:03:

Why have you got a tumbler reverse gear on a drive from a reversable motor?

Robert G8RPI.

Because the wiper motors are designed to run in one direction only. The worm only has a thrust bearing at one end.

You could just put a bearing at the other end. A single ball for the spindle to thrust on would be good enough. Then you can auto reverse electrically. With tumbler gears you will have to stop the motor,move gears and re-start the motor.

Robert G8RPI.

If you are daft enough to start taking a well engineered wiper motor apart just to stuff a bearing ball in there, then good luck.

You keep can keep the last word !

Thread: Milling a 45 degree 'v' slot
21/05/2020 15:25:32

Hi Guys,

Ooo bringing back all the memories of why I got rid of my QCTP.

Thread: A polite question - from a beginner :) Drilling a NONE wandering hole
21/05/2020 15:11:10

Hi Lainchy, Guys,

There are a multitude of reasons why a hole doesn't get drilled where you want and expect it to be. Drilling a small pilot hole isn't always the answer. For hole starting a good centre punch helps.

The most common reason for holes drifting off, particularly deep ones, is as already been mentioned is rigidity. Not necessarily in the machine, but the drill. Applying too much pressure to make the drill cut will cause it to flex. Only a few thou, but enough to cause a hole that starts off perfectly to then end up some distance from the place you expected it to come out.

Just another thing, drills whether cheap or dear are not always ground well. I've spent a lot of time learning how to grind drills properly, and built machines to do it. If you have a choice of drill, choose four facet ground ones. A bit more expensive but not a lot more.

Thread: Milling a 45 degree 'v' slot
21/05/2020 14:35:37

Hello Martin, Guys,

That is basically how I cut the dovetails for this slide.

26-01-2018014.jpg

21/05/2020 14:23:08

Hi Guys,

I notice that nobody has commented about my suggestion of using a 45 degree countersink. HSS or Carbide.

Using one would mean that the work could be securely fastened down to the mill table without any messing about with the mill head and then having to tram it all up again.

Thread: Power feed - 'which motor shall I buy'?
21/05/2020 14:15:49
Posted by Robert Atkinson 2 on 21/05/2020 13:29:25:
Posted by John Baron on 21/05/2020 10:23:19:
Posted by Robert Atkinson 2 on 21/05/2020 07:40:03:

Why have you got a tumbler reverse gear on a drive from a reveresable motor?

Robert G8RPI.

Because the wiper motors are designed to run in one direction only. The worm only has a thrust bearing at one end.

You could just put a bearing at the other end. A single ball for the spindle to thrust on would be good enough. Then you can auto reverse electrically. With tumbler gears you will have to stop the motor,move gears and re-start the motor.

Robert G8RPI.

Hi Robert,

It might pay you to look at how a window screen wiper motor is constructed. That is after you have drilled all the rivets out !

Thread: Milling a 45 degree 'v' slot
21/05/2020 11:04:26
Posted by thaiguzzi on 21/05/2020 10:22:58:
Posted by Michael Gilligan on 21/05/2020 08:10:26:

Go for it, Lee ...

‘though it’s interesting to ponder how much simpler it would be to cut the vees on a shaper.

MichaelG.

june - nov 2014 123.jpg

june - nov 2014 124.jpg

june - nov 2014 133.jpg

june - nov 2014 135.jpg

june - nov 2014 138.jpg

june - nov 2014 143.jpg

Nice !

Thread: Milling spindle motor
21/05/2020 10:46:09
Posted by not done it yet on 21/05/2020 09:50:47:

I just had a look for his profile - he doesn’t even have one! Also looked for his videos but couldn’t decide which bob she was!🙂

Ho hum, more to life than just making models (or videos).

I couldn't agree more. A case of the kettle calling the pot, grimy a*rse !

Thread: Power feed - 'which motor shall I buy'?
21/05/2020 10:23:19
Posted by Robert Atkinson 2 on 21/05/2020 07:40:03:

Why have you got a tumbler reverse gear on a drive from a reversable motor?

Robert G8RPI.

Because the wiper motors are designed to run in one direction only. The worm only has a thrust bearing at one end.

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