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Member postings for Swarf Maker

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

Thread: EN8
07/08/2020 11:33:53

I find it worrying when people with little metallurgical or manufacturing knowledge choose to make safety critical items for their vehicles. In this case 'c wastell' has chosen to ask for much needed advice and for this he is to be applauded.

There is a slight problem in that we have no knowledge of the duty that this wheel spindle will be required to fulfil, and no knowledge of its design parameters.

We all should exercise our 'duty of care' when offering advice, particularly when we know so little about the actual requirement. So whilst EN16T, now better identified as 605M36, is likely to be the preferred specification if this is for a simple spindle supporting individual bearings, there may be other limitations that need to be considered first.

So please 'c wastell', let us know exactly what it is that advice is sought for. And furthermore, when that advice is given, please ensure that you have adequate assurance from the supplier that the material is truly what has been specified. You may well not find the material locally so don't limit yourself to whatever the nearest stockist may have.

Edited By Swarf Maker on 07/08/2020 11:34:58

Thread: Mystery Lathe fitting
20/07/2020 11:20:38

It is the bed anchor for the Colchester style taper turning attachment. I don't know if different models of Colchester lathes used a different part but it would appear to be identical to the ones that I have on my Master 2500 lathes.

Thread: ER32 frustration
29/06/2020 14:20:15

I think that the problem is with local gravity! I have occasional issues just like this with a Clarkson collet ring. I think that what happens is that just at the moment that the thread would engage, your hand lets the ring drop a fraction and thus miss the opportunity.

If it doesn't go first time with one hand I use two fingers (not like that!), one either side of the tool to hold the ring in constant contact with the tool holder body. The other hand does the turning. Usually works within the one turn then.

Thread: Gear Generator
25/06/2020 15:38:00

The F360 Spur gear Add-in allows selection of:- DP or MOD form, Pressure Angle 14.5, 20, 25 or custom, your selection of DP or MOD value, Number of teeth, backlash value, root fillet radius, gear thickness and hole diameter. It computes the pitch diameter for you.

25/06/2020 12:15:44

But do note that Rush Gears only provide representative tooth forms in their drawings unless you are prepared to enter into discussion with them.

Thread: Boxford motor help
24/06/2020 23:41:57

Ewan, you raised the point earlier tonight about wiring and switches. If you use a VFD with a new 3 phase motor then you will have to connect the VFD directly to the motor. You will not be able to use any switches/wiring in the same manner that was used in the original 3 phase configuration. A VFD is not a plug compatible substitute for a 'real' 3 phase supply.

Thread: Hermes Parcels
16/06/2020 15:52:17

I always now ask sellers to NOT use Hermes. For a period of time the individual with the final stage delivery contract for our rural area was someone from the traveller community. A battered estate car would roll up and while the driver dealt with handing over the parcel, 3 other individuals would get out and quickly scout around the outbuildings, look over fences, etc. Clear intent to come back another time to nick anything tasty. When challenged they all strangely were looking for somewhere to have a quick leak - yes, I really believed that! Neighbourhood watch did the police liaison bit and a more reliable delivery lady took over. She has been good for whenever Hermes was unavoidable.

For me, Yodel is another one to take serious effort to avoid. Unfortunately the Dutch postal system seems to favour them for carrying this side of the channel.

Thread: Colchester Student Mk1 Won't Start
04/06/2020 01:12:29

Unmatched belts can certainly cause some strange noises/vibrations/patterns in the finish. If you are experiencing any of these effects you could try operating with just a single belt. That is what I have done on both of my Master 2500 lathes and even though I work them hard, I don't spend all day taking huge cuts as would have perhaps been the case in a production environment. As a consequence all belt derived artifacts no longer arise, but a the same time there is no loss of transmitted power at the levels I require.

The removed belt becomes a spare for when it may be needed, although at least 10 years have gone by with no requirement!

Thread: Used Lathe Pinnacle PL1340C Gap Bed
14/05/2020 17:32:13

That is a good motor configuration to have, but you do need to simulate a proper 400v 3 phase supply. As a general observation forget VFD's. A well specified rotary converter will serve very well for this. I have several 400v 3 phase machines with both single and two speed motors and a wide variation in power requirements. My 5HP rotary hums away quietly and serves all of the machines very adequately.

The headstock noise, along with the gearbox, driven as it is in that demo is typical 600 group lathe (Colchester/Harrison) noise - and usually noisier in reverse.

Thread: Inconsistent access to MEW archive
21/04/2020 00:00:39

But if, as stated by Neil "the archives are not a significant source of income", what is MTM's objection to the old 'Flash' issues being put into a more accessible format, even with the 'risk' of them being pirated?

The demand for them, as perceived by MTM, is seemingly low and thus should be as unattractive to the pirates as it is to MTM.

I have more sympathy with the position regarding current HTML5 issues but the older archives can surely be treated as a separate, low financial risk, issue.

Thread: Dismantling a Pratt Burnerd Grip Tru Chuck
11/04/2020 22:57:00

Andrew Tinsley, the 'as supplied' standard chuck key for these chucks has the hexagon key on one end of the 'T' bar, so as 'ega' says, plenty of leverage!

Thread: Coronavirus - How To Register as Vulnerable
09/04/2020 00:38:50

Vulnerable and registered? Makes no difference here. None of the supermarkets around here have the capacity to deliver and Sainsburys wont even allow me to register with them. I can occasionally get a click and collect Waitrose slot for 3 weeks hence, but only for a store that is 15 miles away. By that time there have been so many changes in stock levels that have led to items being flagged as unavailable, that the 'basket' has to be re-filled just before the click and collect date. Last time that happened they brought the time forward and I only found out by accident that I had a virtually empty 'basket'!

I am not complaining - just stating some of the weaknesses in the systems as they stand. It is important to acknowledge the amount of effort that has been expended in getting to the point where so many people are being supported. There will always be gaps and weaknesses to fall through.

Fortunately the neighbours, who are much better placed than I, have had deliveries for years and are still receiving them. They kindly add essentials to their order for my benefit - for which I am grateful. The other nice thing that has come out of this is the effort that the local greengrocer, butcher and craft brewery have put into adapting their businesses. They now serve my needs and although they had not previously had my business, they will from now on - always assuming that the wife and I survive!.

,

Thread: Todays news -- well done
06/04/2020 01:03:06

Every thing that you Raphael, and your colleagues do, is truly appreciated by anybody with a modicum of understanding.

Unfortunately, circumstances such as these can illuminate the differences in both intellect and understanding across the wide ranging members of our society.

I sincerely hope that you and your colleagues remain safe, both for your own sakes and for the rest of us.

06/04/2020 00:08:54

There are some good 'biking' roads near me. They are so good that a 50mph speed limit has been imposed to try and curb the number of 'biker' fatalities. Summer Sundays the road becomes a race track where it would seem that the objective is not to let your speed fall below the 50mph speed limit.

Although I live 2 miles away, the sound of the screaming engines and accompanying clutch-less gear changes is actually intrusive as these bikes travel a twisty length of around 4 miles. There is all too frequently an intermission as the sirens of the police and ambulance vehicles attend the latest carnage.

Now we are confined to barracks of course, but that means nothing has changed for these inconsiderate idiots. All day long the 'race track' has been active and no doubt that, with reduced traffic, new end-to-end records have been set.

I anticipate that anyone 'losing it' would still expect to be put back together by our over-stretched hospital staff. I cannot find polite words to convey how I feel about their irresponsible actions.

This kind of behaviour is why I am a 'motorcyclist' and not a 'biker'!

Thread: The good bits coming out of the Covid epidemic
02/04/2020 12:15:21

And the sky is silent and the birds are singing - now we can hear them!

Thread: Anyone in NW UK able to offer simple Fusion 360 help?
14/02/2020 00:07:36

I agree that Lars' videos are very good but unfortunately they are now 4 years or so out of date so the user interface for the software has evolved. He does cover the basics well though and as I said above, the principles are still the same.

13/02/2020 22:13:47

You might be better off by using the F360 tutorials and learning, rather than Youtube - although some of those are Autodesk postings.

With F360 open, click the '?' at top right, select 'Learning & Documentation' and then 'Self-Paced Learning'.

Be aware that you may encounter screens that don't reflect the current updated status of the software, although the underlying functionality remains unchanged. Just that some of the menu items are in a different place!

Thread: renew driving licence
05/02/2020 13:48:22

Goes against the requirement for working further into old age as well.

Thread: Is COMPAC' DIAL GAUGE METRIC TYPE 532 60mm Dia worth £45?
21/12/2019 14:15:13

NOS is an abbreviation for New Old Stock. Got beaten to the answer!

Edited By Swarf Maker on 21/12/2019 14:16:11

Thread: Colchester Student Mk1 Won't Start
27/11/2019 20:32:39

Well, I see the nice new cable with its plug going into the big switch box. What I don't see are any wires coming from the output contact set of that switch and into the lathe itself. Are they routed through the backplate of that switch? There is a hole for the wires to come out but nothing visible.

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