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16th Nov 2022, 06:30 PM
Thread: Tapping fluid recommendations
by rcaffin- Replies
- 20
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- 2,688
Cheaper
A lot of the time I just use a bit of SAE engine oil. It seems to work fine with a sharp tap.
With a blunt tap - sharpen the tap first.
On the CNC I use 3:1 kero and olive oil with a pulsed... -
15th Jul 2022, 10:04 PM
Thread: Remote Compressor Start
by rcaffin- Replies
- 18
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- 1,475
Mill motor
My mill has a 3-phase motor.
The supplied 3-pole switch was wonky and had to be replaced.
I did not like any of the readily-available 3-phase switches: either flimsy or overkill.
So
I pull a... -
15th Jul 2022, 06:32 PM
- Replies
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Quality
I have a number of Sutton drill bits. They are hard and sharp, but the tips wobble. The bits seem to have slight curves in them - at least in many of mine.
I usually buy Dormer jobber and stub... -
27th Feb 2022, 08:19 AM
Thread: todays tools gloat
by rcaffin- Replies
- 2,681
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NOT buying anything out of Russia anyhow. ...
NOT buying anything out of Russia anyhow.
Cheers
Roger -
5th Feb 2022, 07:41 PM
Thread: Is it an O-ring or a seal
by rcaffin- Replies
- 15
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- 3,469
Yes, but
Possibly so, but at least they got the bearings cheap.
Cheers
Roger -
5th Feb 2022, 06:20 PM
Thread: Pinnacle of usable motorcycles
by rcaffin- Replies
- 14
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- 1,224
Vw
Then there was the guy who managed to fit a VW Beetle flat four into a bike frame. Not sure about the gearbox. I forget the rest of the details.
Cheers
Roger -
31st Dec 2021, 06:43 AM
Thread: The future of credit card fraud
by rcaffin- Replies
- 14
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- 5,001
Yeah, been there too. An area in the Austrian...
Yeah, been there too.
An area in the Austrian bank network had an error in their permission table, so that my CC issued in Oz was not valid in that area. I even rang the bank in Oz about it, but... -
30th Dec 2021, 08:29 PM
Thread: The future of credit card fraud
by rcaffin- Replies
- 14
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- 5,001
Australian experience
Overseas bushwalking trip planned from Australia.
Put $16k into credit card account for safety, two weeks before departure.
1 week before departure I am rung by the bank's security staff, to... -
30th Dec 2021, 08:17 PM
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- 7
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Cnc
Well, not quite.
It ALL depends on how you create your g-code.
If you are doing it from a CAD model, you will need to go back the start.
However, if you are an experienced programmer using... -
13th Dec 2021, 08:28 PM
Thread: Cross slide graduations on a Metric Lathe
by rcaffin- Replies
- 19
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- 7,414
Threads
Often very pseudo. That is, imperial thread with a pseudo metric dial. It happens.
Cheers -
13th Dec 2021, 08:24 PM
Thread: Strange thread question
by rcaffin- Replies
- 11
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- 1,614
Tank marking
Before anyone has an OHS fit - the tank will be clearly marked just in case any eedjet wants to steal it for whatever reason.
Why should this worry you?
Think of it as a contribution to... -
13th Dec 2021, 08:21 PM
Thread: 1" or 25mm slitting saws.
by rcaffin- Replies
- 15
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- 1,981
Arbors
It's not hard to do. I have made several. But there is a little catch to it.
Your chuck will not be absolutely centred with zero runout. Real life.
So if you make your arbor just by machining the... -
14th Sep 2021, 06:43 PM
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FS, Sydney: heavy transformer and output power supply
FS: heavy transformer and output power supply
$40 plus any freight
This was taken off a functioning CNC machine as more power was needed. The 230 VAC transformer has multiple windings:
2 off 115... -
25th Jun 2021, 06:24 PM
- Replies
- 94
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- 16,697
Um? I am missing something here. Help! (It's...
Um?
I am missing something here. Help!
(It's not the EF collet series per se.)
Cheers
Roger -
25th Jun 2021, 09:39 AM
- Replies
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- 16,697
they were better than sliced bread. Anything is...
they were better than sliced bread.
Anything is better than sliced white bread!
On the CNC lathe I use gang tooling, all preset. That way I don't have to swap tools all the time.
392666
(the... -
24th Jun 2021, 07:17 PM
- Replies
- 94
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- 16,697
Qctp
My lathe came with a rocker, but I soon swapped a QCTP in place. Never looked back.
So I bought a second QCTP, for the CNC lathe. Guess what: The tool holders are not strictly compatible between the... -
23rd Jun 2021, 08:35 PM
- Replies
- 94
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- 16,697
You can't
Well, that won't work! You need the opposite: a light oil would be a start.
There is only one way: do not put them there in the first place. Nothing else works.
First of all, that steel looks... -
10th Nov 2020, 09:35 AM
Thread: todays tools gloat
by rcaffin- Replies
- 2,681
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- 1,138,936
yes, but
I agree that trying to use a CNC for a strictly one-off job is a debatable proposition, but there are plenty of exceptions.
On a manual lathe I can machine happily to 0.1 mm, in one direction. The... -
2nd Nov 2020, 07:24 PM
Thread: Washing machine tap woes!
by rcaffin- Replies
- 21
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- 5,407
Filter
When a pipe breaks in our street it lets enough grit into the pipes so that washer replacement (grit gets embedded in the washer) becomes more like every 6-12 weeks until the stuff finally gets...
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2nd Nov 2020, 06:33 PM
Thread: Dial indicator repair in Oz?
by rcaffin- Replies
- 16
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- 5,227
If you get this far you should have an idea of...
If you get this far you should have an idea of what is causing the fault. If you don't have to disturb the backlash gears and can clean the grit it would be the easiest solution.
Thank you Steve.... -
2nd Nov 2020, 06:22 PM
Thread: Washing machine tap woes!
by rcaffin- Replies
- 21
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- 5,407
Where's the problem?
Is there a problem with replacing a tap washer once every 6 - 12 months? Takes me just a few minutes.
I see Bunnings has some O-ring tap washers as well. You can NOT over-tighten these. Well, I... -
8th Sep 2020, 07:57 PM
Thread: Where to buy quality drill sets
by rcaffin- Replies
- 38
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- 9,979
Iscar
Iscar do an aluminium carbide endmill pack (6, 8, 10 and 12mm I think) that's so cheap we don't even bother re-grinding them.
Thank you, I will have a look. Remember I am on a retired hobbyist... -
8th Sep 2020, 09:01 AM
Thread: Where to buy quality drill sets
by rcaffin- Replies
- 38
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- 9,979
Well, it's complex. First of all, I was...
Well, it's complex.
First of all, I was talking about drill bits, not milling cutters. HSS drill bits just seem sharper and tougher than carbide. I have trashed a few small carbide bits drilling... -
7th Sep 2020, 10:17 PM
Thread: Where to buy quality drill sets
by rcaffin- Replies
- 38
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- 9,979
Various points
Some things I have noticed over the years:
Drill sets are usually cheap rubbish.
If the point of the drill is not dead centre, the hole will be oversize except at the break-through. (I have had... -
17th Aug 2020, 12:23 PM
Thread: I am tired of crap products
by rcaffin- Replies
- 31
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- 9,319
Could be a resonance: check the tightness of the...
Could be a resonance: check the tightness of the bearings in their mounts.
Cheers
Roger -
17th Aug 2020, 12:22 PM
Thread: I am tired of crap products
by rcaffin- Replies
- 31
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- 9,319
And the first thing they do (around here anyhow)...
And the first thing they do (around here anyhow) is to acquire a couple of large dogs and let them roam free. Then they are most upset when their dogs are legally shot on someone else's property as...
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16th Aug 2020, 11:49 AM
Thread: I am tired of crap products
by rcaffin- Replies
- 31
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- 9,319
Ok so buy in an old suburb or a small acreage...
Ok so buy in an old suburb or a small acreage $60k+ to build shed, council 7 neighbours who demand we buy more locally halt the process becasuse it doesn't fit their lifestyle!
Buy old farm... -
13th Jul 2020, 07:25 PM
Thread: Hair Thin Cuts in a Metal Comb
by rcaffin- Replies
- 42
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- 9,261
each slot being a different length... Oops! Oh...
each slot being a different length...
Oops!
Oh well, CNC with a single slitting saw, multiple cuts. It's just g-code ...
Cheers
Roger -
13th Jul 2020, 06:56 PM
Thread: CNC down need new stepper motor
by rcaffin- Replies
- 5
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- 4,822
Bore out pulley. Not hard, and pulleys are cheap....
Bore out pulley. Not hard, and pulleys are cheap.
Mounting the pulley so it is centred is key. Use existing hole as a guide.
Cheers
Roger -
13th Jul 2020, 06:53 PM
Thread: Slot Drill Size
by rcaffin- Replies
- 5
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- 1,949
Dear me. Where did that come from??? But yes, if...
Dear me. Where did that come from???
But yes, if it is undersize you can handle that. In fact, I often prefer to do it that way, after micing the cutter carefully.
Cheers
Roger -
13th Jul 2020, 06:43 PM
Thread: Hair Thin Cuts in a Metal Comb
by rcaffin- Replies
- 42
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- 9,261
A stack of slitting saws of the required...
A stack of slitting saws of the required thickness, with spacers between them.
Low revs - you approximate the speed of a hacksaw blade. Low feed rate to match.
The oil is to wash the swarf away,... -
13th Jul 2020, 06:38 PM
Thread: I am tired of crap products
by rcaffin- Replies
- 31
- Views
- 9,319
There have been many reports of imported...
There have been many reports of imported materials which don't measure up to spec, and for the life of me I can't see why our government permits this sort of thing to continue. I really believe...
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Or
Or use some sheet lead and some (thin) BluTack. Yes, that does work.
Cheers
Roger -
12th May 2020, 08:54 PM
Thread: Do you cover your machine?
by rcaffin- Replies
- 22
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- 6,065
Dust
Sydney - humidity. Sawdust and 'other' dust holds moisture.
So I cover both the lathe and the mill bed with light plastic sheeting. Stuff accumulates on top of the plastic. No condensation... -
27th Apr 2020, 03:03 PM
Thread: Machining to New Tolerances
by rcaffin- Replies
- 9
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- 3,037
Vacuum
Whether the joint lines are visible or not is one thing, but the vacuum seal on the inserted plug has no dependence on camera resolution.
Cheers
Roger -
27th Apr 2020, 01:12 PM
Thread: Machining to New Tolerances
by rcaffin- Replies
- 9
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- 3,037
Floor
Certainly not on my barn floor: 100 yr old fly-ash 'concrete'!
Cheers
Roger -
27th Apr 2020, 11:59 AM
Thread: Machining to New Tolerances
by rcaffin- Replies
- 9
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- 3,037
Impressive
Very impressive.
But I wonder what the price of the machine is? Not a hobby machine at all!
Cheers
Roger -
6th Apr 2020, 03:44 PM
Thread: todays tools gloat
by rcaffin- Replies
- 2,681
- Views
- 1,138,936
4-Jaw
Looks very much like my 4-jaw, off a little H&F Chinese lathe.
I managed to cut a matching thread in steel to make a dog system.
What thread does the Hercus use?
Cheers
Roger
EDIT: My little... -
11th Mar 2020, 08:28 PM
Thread: CNC Mill Striations
by rcaffin- Replies
- 18
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- 6,499
Chatter?
The 1st pic looks like chatter to me. The 2nd pic is just weird.
I would want to check for any play or flex in the table or the spindle.
Cheers
Roger -
2nd Feb 2020, 11:27 AM
Thread: Moore & Wright
by rcaffin- Replies
- 26
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- 8,325
? ? ? ? ? ? ? ? It's a gauge, not a cutting...
? ? ? ? ? ? ? ?
It's a gauge, not a cutting tool.
Cheers
Roger -
1st Feb 2020, 11:37 AM
Thread: Moore & Wright
by rcaffin- Replies
- 26
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- 8,325
Flipped?
Seems to me that there may be TWO problems here.
* The first is the accuracy of the angles. Without access to the hardware I cannot comment on that. Jiggle the line fitting and the results might be... -
30th Jan 2020, 12:37 PM
Thread: Moore & Wright
by rcaffin- Replies
- 26
- Views
- 8,325
Photos?
Any chance of posting the photos?
For our education.
Cheers
Roger -
29th Jan 2020, 08:30 PM
Thread: Moore & Wright
by rcaffin- Replies
- 26
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- 8,325
Well, if I got them some 40 years ago, and they...
Well, if I got them some 40 years ago, and they were possibly 20 years older than that, I think we could safely assume they were genuine. :)
Modern stuff? Like the M&W stuff quoted earlier? Oh,... -
29th Jan 2020, 11:32 AM
Thread: Moore & Wright
by rcaffin- Replies
- 26
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- 8,325
Old & new
Which may be why I am still using some 20 - 40 yr old UK/USA metrology gear. It seems to hold its calibration. My two 'old' Mitutoyo mics (Japanese) are also good.
On the other hand, I did buy two... -
27th Jan 2020, 06:54 AM
- Replies
- 24
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- 7,510
Speedbores
Speedbores - yeah, that's them. I especially like the version with the little pointy tips out at the corners.
My B&D with 2 gears runs at 900 RPM on low gear: and goes through almost anything.
... -
26th Jan 2020, 09:35 PM
- Replies
- 24
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- 7,510
I have a 40 yr old B&D corded drill with cast...
I have a 40 yr old B&D corded drill with cast aluminium body and 2 speeds (by gears). Made before they went plastic. I have a smaller Makita corded drill as well. Both get used extensively on the...
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26th Jan 2020, 09:24 PM
Thread: Moore & Wright
by rcaffin- Replies
- 26
- Views
- 8,325
Two classes
My experience has been that there are three classes or cultures in China.
* The first is the old State-run factory, where they don't have much/any QC and will only sell to you in container lots.... -
23rd Oct 2019, 06:59 PM
Thread: Ballscrew Nut Re-fit
by rcaffin- Replies
- 31
- Views
- 33,271
servicing
It seems to me, about 18 microns backlash in the ballscrew is OK for a turret mill X-axis.
Depends on what you want from the machine. My system resolution is 0.8 um, and I routinely zero it to 10... -
23rd Oct 2019, 10:39 AM
Thread: Ballscrew Nut Re-fit
by rcaffin- Replies
- 31
- Views
- 33,271
A different view
In my experience of servicing ball nuts, you cannot get a zero backlash result from a single ball screw nut. It isn't possible, and you should not even try. A slight temperature change and you will...
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23rd Oct 2019, 08:17 AM
Thread: Does your hobby turn a profit?
by rcaffin- Replies
- 17
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- 4,408
Poll: Cost of time!
I do make some specialised things for my main hobby and I sell them internationally. The cost of the materials is only a small fraction of the sale cost, so that looks like a huge profit - until you...