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Member postings for Robin

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

Thread: Bench grinder
23/07/2021 19:15:13
Posted by brian jones 11 on 23/07/2021 15:58:14:

but have you change a wheel yet?

I did pop one out just to see if it was as easy as claimed. wink

23/07/2021 11:22:09

I knew nothing about bench grinders so I typed, "Which bench grinder?" into Google and then bought a Metabo DS200.

's loverly.

Thread: What Did You Do Today 2021
19/07/2021 10:52:16
Posted by Anthony Knights on 16/07/2021 10:21:29:

I just cannot get on with the crappy lead free stuff.

I was changing a lot of optics. By some miracle I always seemed to guess correctly as to whether it was the photodiode or the LED that had failed.

Then I realised I wasn't changing the optic, I was changing the solder and always at the button cell end.

One leaky battery and the solder joint died. Still looked okay it just didn't conduct

Thread: Best soldering iron for electronics
19/07/2021 10:24:46

I do a lot of soldering. Eventually, I got fed up with Chinese 852's. It's nice to have the hot air nozzle but the irons were very hit and miss on temperature and once a pad boils off the board it is nigh on impossible to put it back.

I eventually returned to the fold and got me the reasonably priced Weller WE1010 and have never looked back.

It features a timer so it is immune to being left on accidentally overnight.

Thread: We thought the Aliens had landed
18/07/2021 23:34:28

We have one of those up on Seaford head. It hums to itself and miraculously causes aircraft to turn 90 degrees as they pass overhead.

Thread: working Damascus steel
14/07/2021 11:36:42

The blacksmith at Rodmell forge told me that when steel was in short supply due to WW2 the shepherds would bring him old shotgun barrels to be made into the Sussex leg crook. When he tried to reduce the diameter on Damascus barrels they came unwound. It was never actually welded.

Similarly, if you wind a Damascus barrel then rifle it, you are cutting across the grain of the Damascus and the rifling has no strength. A rifled Damascus barre starts with a tape wound core.

I have one of the original Liege Damascus shotgun barrel blanks Peter Dyson was selling off. It has a beautiful loopy pattern. Wonder if he has any left.

Thread: Did I imagine that?
12/07/2021 14:38:18
Posted by JasonB on 12/07/2021 12:32:32:

EN1A on the smaller gears, Larger one was more likely EN3, blunted a lot faster than say the £20 ea RDG ones. Think they were MOD0.5 and about £5 each

My goodness, your gear pictures make me even more determined to cut involute teeth. What is wrong with me? face 22

12/07/2021 14:18:57

So many things to buy and my mill in pieces, whatever next? nerd

12/07/2021 12:26:34

I shall hope for 16DP then, sounds better than MOD1 already.

What material were you cutting to blunt HSS?

Do you think they might be high carbon steel dressed up as lamb?

12/07/2021 11:59:12

Did I really just buy a set of M1 involute gear cutters for £34.49 on offer from Amazon with free shipping and delivery in 3 weeks? Perhaps I imagined it. I couldn't help myself. It was an involuntary burst of mouse clicking and all over before I knew what was happening.

I mean, what's the worst that can happen?

8Pcs Involute Gear Milling Cutter High Speed Steel Cutting Tools Set Machine Tool Accessories 14.5° Pressure Angle 55mm 22mm

Thread: Metal Suppliers
11/07/2021 11:08:53

Another vote for Rapid Metals. Free delivery with DHL if you spend enough and they will sell you little bits without cost penalties. Watch out for their 4mm sheet though, it's bent.

Thread: Chinese drip feed oilers
11/07/2021 10:46:30

Of course, Old Muggin's here has a bag full of them frown

They need a bit of work in the throttle if you want it to shut off.

The top spring thing that uncovers the fill hole and holds the drip adjust wherever you left it, is a steel stamping with sharp edges so nothing about it is easy.

The screw thread at the bottom was not something I had in my collection of taps and dies.

What about those digital oilers with the interval and duration timers? Somebody stop me indecision

Thread: Uncertainty of Measurement [Global Warming]
07/07/2021 10:51:16

Remember, this is attribution, so there doesn't have to be any warming to make the temperature rise.

All you need is a fall during the calibration period, in this case 1850-1900.

07/07/2021 10:32:34

Attribution science graphs.

"Attribution science" meaning any climate variation that the maker of the graph could not explain must be due to carbon dioxide and human activity.

A novel approach to science that will probably last at least 20 seconds beyond the point where the funding runs out smiley

Thread: Milling arbor sans keyway?
03/07/2021 12:53:26
Posted by Journeyman on 03/07/2021 12:07:27:

A paragraph from my website regarding ISO etc. tapers

Tell me about it frown

I have a couple of ISO30 ER32 collet chucks that I bought before I realised Warco had it wrong.

I will probably give them to my son, he can flog them on that auction site and make a few quid.

There are some tasty, low overhang, INT30 ER32 chucks out there. I got one and am looking for another.

Robin

Edited By Robin on 03/07/2021 12:53:53

03/07/2021 11:58:32
Posted by Roderick Jenkins on 03/07/2021 11:33:40:

My Sharp mill has a 1" arbor without a keyway. I haven't had any problems cutting 20 DP gears.

rolls milling.jpg

I love it. I feel a deep need to cut gears, probably just a blood clot but it still has to happen thinking

03/07/2021 11:54:38
Posted by Howard Lewis on 03/07/2021 11:38:41:

The 22 mm arbor is probably intended to carry Slitting Saws

A Slitting Saw should never be used with a key.

Fascinating. You might think it would make more sense to omit the keyway from the saw rather than the arbor.

Could I be up against some weird H&S thing?

Robin

03/07/2021 11:45:49
Posted by Dave Halford on 03/07/2021 11:27:17:

The Warco ad claims ISO30, which was fitted on some late Centec 2B machines. Power output is similar as well.

The Centec does not require a keyway, the friction from the arbor nut is sufficient to prevent slip even on a 3/8 wide cutter.

The Warco Ad confused me. ISO30 lacks the driving dogs, whatever they are called, so this is INT30 which has them. There is also BT30 for auto tool changers but it isn't that either.

I think I have to cut the keyway to keep it cushty, but if I can get away without then I am safe to buy a set of involute cutters and see how big the keyway needs to be.

I have a 6mm broach so I am hoping it's a 6 smiley

03/07/2021 11:17:57
Posted by Andrew Johnston on 03/07/2021 11:11:35:

Are you sure it's INT50?

No it is INT30, I have a problem with my brain sad

03/07/2021 10:33:09

I bought a new Warco HV mill and I love it to bits, lots of bits, it is all in pieces but slowly coming back together.

It came with two horizontal spindles, 22mm and 27mm.

The 27mm has a keyway while the 22mm has none.

Is that normal? I have no experience.

I notice that gear cutter bores seem to depend on the Modulus. At M2.75 they make the leap from 22 to 27mm bore. I wondered if perhaps the smaller sizes need less torque? Seems unlikely.

Perhaps you are expected to cut your own choice of keyway. This could be catch 22 if all the milling cutters that might cut the keyway are bored 22 because they are considered pathetically small out there in the real world sad

RDG tools have a 1" INT50 spindle that would fit and lots of DP size cutters to go on it. Unfortunately, they forget to say if it has a keyway and I have become suspicious. Also, does INT50 imply it wants a 40mm support bushing at t'other end?

Too many questions thinking

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