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Member postings for not done it yet

Here is a list of all the postings not done it yet has made in our forums. Click on a thread name to jump to the thread.

Thread: What to get: Imperial or metric
26/08/2016 16:41:26

I can instantly envisage what 3/8” looks like - but 9.525mm? - I’ll get m’book then !

The simple argument to this is that any metricated person woud never even think of what the imperial fraction would be for 10mm! Even if they came accross a 9.525mm measurement and converted it to inches, they would come up with a decimal answer of 0.375, not 3/8.

Come to think about it, who would dial in 3/8 on an imperial lathe without first convertig it to thousandths? Try 25/32 or 31/64 and see what I mean? So only decimal inches are really used on the lathe or milling machine, anyway.

26/08/2016 09:13:12

I have both metric and imperial machines (not my lathe). Metric is favourite by far (although I am completely competent in both), but it is virtually immaterial with a dro, excepting threading as stated above.

I have used most of the different systems over the last half century, or more, and metric is very much universal (SI uits, actually).The only difference for threading is needing a conversion gear, or gears, and the cutter must be driven in reverse ready for the next cut.

Only the US uses feet and inches system as a major nation. All imperial units can be changed to metric units, but for modellers making scale models in 1:2, 1:4, and a few other scales, it might appear to be easier to scale original full sized imperial drawings.

The imperial system will be used less and less as time progresses. That is for sure! Think globally, and realise that most cars made have metric speedometers, not mph ones! Only the US distorts the otherwise almost universal metric system.

Imperial fixings and tooling will become more expensive as time progresses. Metric is already the manufacturer's choice and will be almost universal if (or when) the US were to join the rest of the world in this century.

Most, who advocate imperial, will be older or american. Many british children still only know their height and weght in imperial units - but lots don't know how many inches there are in a foot, or pounds in a stone!

Yes, be brave, go metric. I only bought imperial machines because, for me, old british iron is preferable to lesser quality chinese items.

Thread: Compressor only works for one cycle
25/08/2016 23:57:02

Don't try to complicate things. You do not need an infrared thermometer. Just check as I said earlier. A rev counter would be more appropriate.

Thread: Knurling machine
25/08/2016 20:54:53

Curtain rail if around a 25mm diameter pipe? Any other sugestions?

Thread: Myford ML4 ?
25/08/2016 20:17:42

Know little about Myfords (I've got a Raglan) but I doubt it had a V belt drive originally. More likel

y a flat belt, I would guess, but I may be wrong.

Thread: Knurling machine
25/08/2016 19:36:41

Cupro-nickel pipe is your typical quality replacement brake pipe for cars and trucks, so fairly high pressure and corrosion resistant. No idea what else it might be used for. Max inch and a quarter, if it was imperial when new. I was wondering how each 'bed length' gets fed in without excess knurling in one place (or maybe it doesn't matter?).

Thread: Compressor only works for one cycle
25/08/2016 15:31:52

Does the motor actually get to full speed on restart? If not it may be starting on load due to back leakage and then struggling because the start windings have not got it up to speed quickly enough?

Try starting from very low pressure, or zero, immediately after it gets to the stalling situation. That would determine if it is the compressor getting tight or the motor not delivering full torque.

Thread: Desoldering : soft solder.
25/08/2016 10:10:09

The solder sucker is prolly best for desoldering electronics from a pcb. I don't use mine often but very useful - if I can find it! Solder wick is likely better for long runs like you have. Main difference is that the sucker will last years (if you don't lose it!).

Thread: Hidden treasure
24/08/2016 13:58:20


You have a PM.

Nowt to do with the lathe.

Thread: Bench grinder bearing replacment
24/08/2016 11:54:54

Take the old bearigs to your local bearing factor. They will (or should) know either the bearing or an equivalent.

Thread: Who sells horizontal arbor milling cutters?
23/08/2016 20:57:37

My 1'' Centec does not have a keyway. Sorry for my perhaps misleading post earlier, but after hunting the net the Mk2 seemed to be fitted with a simple vertical head which clamped to the arbor support bar. Can't locate that pic since. There was me thinking it might be like my Centec, but on a much smaller scale.

Thread: Why did you do that ?
23/08/2016 20:28:16

There's another.smiley

Niobium is a different element - it is not Neodymium!

Thread: PCNC770 - The Wait Is Almost Over....
18/08/2016 07:39:11

I hope the one coming in the opposite direction doesn't collide.......

Thread: Knurling
18/08/2016 07:29:11

Beginners reading this should take careful note of this thread. Cheaper tools are not necessarily best and can stress your major investment.

Purchase decisions, for things such as the QCTP, where not paying the 'apparent better price' for a complete 'kit' and buying only what is needed, is a better option. I bought a complete set and have regretted paying more for something I will not use (hindsight, of course!). I daresay I will likely machine it into another basic tool holder eventually, but it is, nevertheless, annoying.

Thread: Micro angle grinder?
17/08/2016 22:01:12

A 4'' with a worn down disc? Dremels are at the other end of the spectrum? How about a grinder on a flxible power drive, similar but larger than those supplied with dremels. Similar to those used that clean up and polish engine ports/heads, etc? An air tool is most likely the easiest option, if not so quiet, for your purpose?

For what purpose, btw. Might help to know?

Thread: Boring pulley wheel
16/08/2016 07:21:04

I would be more thoughtful re the periphery runout than the spindle hole. Dti'd for true running in both axial and radial direcections, the boring will achieve the target of true running. Setting up on the bore or hub will introduce the opportunity of more error, at the outer circumference, for the same tolerance of the setting procedure.

Thread: Think I have burnt out my lathe motor
14/08/2016 13:29:04

Are they prone to killing motors.

'They' being lathes? No.

Mostly, electric motors are very reliable. Usually damaged by incorrect usage. But if it is Chinese, that generalisation may be being a bit stretched.

Thread: Sieg G1 power hacksaw
14/08/2016 12:03:32

He's not curious, but probably cautious. Likely previous experience?

Thread: How on earth do they do it?
14/08/2016 12:00:47

A thread on the performance of our athletes has, regrettably, sunk to the level of pros and cons of watching the Google box. We don't have one, don't want to want endless drivel on a small (or large) screen.

That makes no difference to the performance of our olympic athletes. They have already done superbly well. That is whether you might watch it or not. Remember, topic is their achievement, nothing else. If you want to winge, make a thread and see how much interest you get.

14/08/2016 09:33:52

It's likely not so much an improvement. Our athletes do the very best they can, often being disadvantaged in comparison to other nations (for more than one reason). They are clearly some of the best in the world and maybe got on so well because of the anti-drug system improving so much, recently, thereby removing some undeserving competitors from the Olympics.

A dedicated bunch, and they deserve every medal they win. And all the rest of the team can be proud to have even represented their small country at such a high level.

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