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Member postings for Dave Halford

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

Thread: Super 7 stiff feedscrews
28/10/2021 12:44:40

TWF,

You've not shared just how much backlash that you now have.

To be honest this "With the old feedscrews they were lovely and smooth in action, they just had noticeable slip backwards and forwards". just says knackered.

As someone who has just changed the 1/2" x 10tpi LH cross-slide screw on my lathe (Rockwell Delta 10" by getting a length of Acme rod of Ebay from a nice man in Wales who makes leadscrew nuts. I've now gone from 50 thou lash to 10 thou. All I did was turn a tenon on the new screw, hacksaw the old thread off and drill what's left and Loctite the two together.

It seemed quite stiff holding both nut and screw and turning them, when fitted it seemed much looser, but given what I did is asking for a screw wobble, but there is no tight and loose.

Have you tried rolling the screw on a granite tile or glass plate to see if it wobbles?

You no doubt have Gib wear in the middle so each end may now feel stiffer.

Compare old nut with new.

Thread: An Uninvited Guest!
28/10/2021 10:23:14
Posted by Michael Gilligan on 26/10/2021 17:58:18:
Posted by Dave Halford on 26/10/2021 17:47:01:

SBK will do it

.

You seem to know your weedkillers, Dave

… is it any good on horsetails ?

We have some growing up through a rockery which appear to have re-grown from root-fragments in the clay, and probably date back 100 years or more crying 2

MichaelG.

Missed this, sorry Michael,

Maybe it will, they treat Japanese Knotweed around here in the autumn because thats when the plant actively sucks the sap back into the roots and therefore sucks the poison down as well.

28/10/2021 09:54:25
Posted by Frances IoM on 28/10/2021 09:47:41:
is SBK the name of a commercial product or some as yet unexplained acronym?

Just ask google Frances

Thread: Unusual Watchmakers Tool?
27/10/2021 21:00:57
Posted by Tim Stevens on 27/10/2021 17:55:25:

The round copper object could possibly a token from the days when no-one could bring themselves to speak in an outright manner. We still don't have a name for the process by which we void waste, and this is the proverbial 'penny' that we claimed to be 'spending'.

Cheers, Tim

Today we would have to call them steels

Thread: Lathe Drilling
27/10/2021 20:56:25

It's possible the spindle taper is off, but the chuck is OK.

If the tailstock is low it will drill big.

If the tailstock offset loosens when the tailstock is unclamped it will drill big

26/10/2021 19:57:14

Dave,

As you have never mentioned normal turning operations and you set the centres with the ruler test, did you try rotating the spindle?

It could be the work wobbling the drill, which would mean your chuck is off.

A 4mm drill will wobble if you have a centre pip left by facing.

Edited By Dave Halford on 26/10/2021 20:00:29

Thread: An Uninvited Guest!
26/10/2021 17:47:01

SBK will do it

Thread: Lathe Drilling
26/10/2021 16:47:02

Dave,

Either swap your tail stock for your Dads if it's the same one or inspect it's taper for burrs.

26/10/2021 16:25:46

No Brian,

My dad does have the same lathe though and his drills perfect. We've both been scratching our heads on this one as when he uses mine with his drills and chuck even, he gets the same wander.

Thread: An Uninvited Guest!
26/10/2021 15:31:48

Myford Strangler Vine

Thread: Lathe Drilling
26/10/2021 11:47:37

Try comparing a centre held in the 3 jaw turned from a piece of rod after using the test bar, something is out of line

Thread: Warco milling machine speeds
25/10/2021 19:01:16

Then there's the Minor and the Economy and didn't they do one or two with only two pullies.

My crystal balls batteries have gone flat.

Thread: Rust Protection
25/10/2021 14:18:53
Posted by Chris Suddell on 25/10/2021 05:41:55:

I think I'm done for because my Lathe and Mill are in a concrete garage with no insulation.

I'm going to clean them up again and apply some rust preventative and I'm going to have to keep on top of them every week. Unfortunately I only use them about every month. Most of my parts are 3d printed.

It looks like the long term solution is to get them out of the garage and into an insulated wooden shed.

Thanks for all the replies.

External garages like concrete ones seldom have a damp proof membrane under the floor, that might be your problem.

Thread: A workholding question.
25/10/2021 13:15:07

Robin,

Even with the through bolt mounting you will still have a significant off centre cutting force which will tend to rotate the disc as it tries to run away from the cutter. Also full width cut slots tend to wander especially if one side of the slot is deeper than the other like this.

If you have a smaller cutter I suggest you use it

Thread: Rust Protection
24/10/2021 17:01:46

It might be caused by chemical means.

That rust causing non acidic flux for soft solder you can get these days.

Brick cleaner have a quiet slow leak out of sight.

Garden products like cheap lawn food usually, green leakage.

Etc etc.

Thread: Have You considered getting a 3D printer
24/10/2021 16:55:23
Posted by Michael Gilligan on 24/10/2021 14:01:00:

.

This nonsense reminds me of a time [back in the early 1960s] when I was a ‘Boy Scout’ :

Attending Church Parade one day; I was requested to hand-in my knife before entering the Church

I flatly refused … On the basis that my knife was a tool, not a weapon.

MichaelG.

I'm sure that was to stop the initials MG appearing in the back of a pew.

Thread: Pratt Burnerd 4 Jaw Chuck
24/10/2021 12:03:22

Len,

The backplate holds them in.

24/10/2021 11:03:14

I tapped mine out with a hammer and knackered screwdriver.

Thread: Sewage dumping
24/10/2021 11:00:17

Like Mark I used to believe in the separate drains system, however at least for SevernTrent it appears to be an Urban myth. If road drains are still separate then all the oil, brake and tyre dust goes straight to the river.

Whats wrong is when water companies discharge straight to the river in times of low rainfall to keep costs down.

Thread: Mag chuck dismantling
23/10/2021 18:08:32

The magnets are said to loose their magnetism pretty quickly.

They are oil filled. follow the link

 

And here

Edited By Dave Halford on 23/10/2021 18:15:16

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