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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: Building Stand
27/09/2020 14:01:43

You could use a £50 Clarke engine stand and bolt a custom fit cradle for your engine to it

Thread: Cheap Milling Vice Question
27/09/2020 10:40:15

They are bigger than you envisage blush

Thread: Quality Problems With the Sieg sx2.7
26/09/2020 19:05:17

I can leave it this way and ignore the fact that I have a play in the head of 0.2 mm which I can not fix since the gib will not go any further and if it did I will lose even more travel of the head (at the top) and I will have to live with the fact that the quill is not parallel to the head.

If this was an old style gib with screws every 50mm to adjust the play, then being tight at one end would imply the wrong adjustment and would possibly tilt the head.

Don't wedge gibs require equal adjustment at each end?

26/09/2020 12:02:18

Drill chucks tend to have quite a wobble and add their own random error when you turn it or re chuck something.

Do not use any milling cutters on that without a proper cutter holder

Thread: fly cutter wear
25/09/2020 10:20:28
Posted by John Baron on 25/09/2020 08:55:15:

Hi Clive, Guys,

I did try with a carbide insert but I found that they chipped very easily, usually when they hit the edge of the work. probably not suitable for too large a DOC.

Square HSS was the best to use and much easier to clamp. I think that getting the tool radius right and a shallow back rake, about 5 degrees giving more support to the cutting edge is about right.

You need a milling rated insert for interrupted cuts

24/09/2020 20:23:02
Posted by Philip Burley on 24/09/2020 19:17:58:

I have ground that flat off several times , but cutter will only last a few cuts , maybe it's a bit soft . great on alloy or brass

HSS is HSS it shouldn't be 'a bit soft' unless you have some old school tool steel that needs hardening and tempering.

24/09/2020 19:11:49

Serious wear on that, might be rubbed to death. Have you tried faster feed?

Cutter should be parallel to the holder base. Are all three screws tight?

Grind that flat completely off.

Thread: Anyone recognise these.
24/09/2020 19:02:39

All for the mill

Two APKT type insert cutters, one radius cutter, one bull nose and lastly a 45deg for truing your lathe tailstock etc or a counter sink

Thread: What sort of light source to use a strobe disc?
24/09/2020 17:33:51

Tube if it's a 50Hz disc

Thread: Vacuum Pump Advice Please!
24/09/2020 17:29:49

You've not said the vanes are free to move? beaten to it

Below near the base is a plastic screw screw cap covering a felt pad with access to a chamber filled with coarse fibre: could be a filter, or an oil pad. Anyone know if this is the oiling point?

This sounds like to be an oil trap for the bearing breather, perhaps to stop it pumping all the oil out.

It's a lab pump link

Edited By Dave Halford on 24/09/2020 17:30:16

Thread: Quality Control ?
24/09/2020 17:05:30

How come you don't end up with just the ring pull dangling from your finger?

Thread: Climb Milling any implications
24/09/2020 12:33:25

Climb milling tends to drag the work in, in other words it can self feed. Standard starts with a slight rub and opposes the feed.

 

Edited By Dave Halford on 24/09/2020 12:35:53

Thread: Chatter
24/09/2020 12:08:59

If those tips came with a 4 piece under £20 CCMT set you can get CCGT from the same source. They make a huge difference.

Thread: Climb Milling any implications
23/09/2020 14:18:35

It's easy to find on the web

web

Thread: Covid causing mental health issues.
23/09/2020 14:14:26
Posted by Peter G. Shaw on 22/09/2020 21:27:26:

Martin P,

Just to put something into perspective, earlier this year I was doing some genealogical research on a man who may have been my wife's grandfather, and I managed to trace his ancesters back to around 1800. Strange as it may seem, two families of his ancesters, both originally living south of Lancaster, migrated to Bradford in the mid 1800's. Now how did they get there? No buses, roads probably no more than cart tracks, railways possible but maybe not, canal, possible but maybe not. Just think of the stress involved in uprooting from Lancaster, leaving all their friends behind probably never to see them again, and making that trip to Bradford, looking for somewhere to stay, and then finding a job.

Peter G. Shaw

What perspective?

The Yorkshire mills were recruiting all over the country. They went to Bradford the same way Jeremy Paxmans family did when they left Suffolk, on an organised trip to an organised job.

Thread: Creating negative pressure in flue?
21/09/2020 15:48:22

Have you considered the carbon monoxide might get you if you do it wrong.

Thread: which older mill to complement a ML7?
21/09/2020 14:29:29

The Raglan is too fast for gear cutting with the common 3" dia cutters.

The spindle is fixed

The belt is around £50 and make sure all the speed change parts are present.

To CNC convert will require a stepper capable of lifting the knee.

There's nothing to blow up or plastic to break.

Chinese spares come from parts machines that the importers dismantle, so availability is not what you expect, if a new version comes out, 'spares' run out quite quickly.

 

Edited By Dave Halford on 21/09/2020 14:30:26

Thread: 1" Minnie boiler stays
11/09/2020 12:08:14
Posted by Clive Brown 1 on 11/09/2020 11:38:28:

If the OP has already fitted the backplate, silver-soldering wouldn't be the easiest job.

Why is that Clive? Torch breathing trouble?

Thread: Left Hand Milling Cutter
09/09/2020 17:37:04
Posted by not done it yet on 09/09/2020 16:05:49:

Horizontal milling cutters can be turned to cut the other way. So can slitting saws.

Thats when you need a key otherwise the nut comes undone

Thread: Myford super7 motor U/S
09/09/2020 11:24:17

The cap might have black stuff leaking out, that means it's dead. Some lathe suitable motors are cap start some are cap start & cap run (there are 2 values of cap on the motor plate) buy the right replacement.

The centrifugal switch is in the wiring end cap.

Check the winding air passages are clear of rubbish like plastic swarf before you reassemble.

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