What did you do today (2015)

[Les Jones 1Participant @lesjones1]

Hi capnahab,
There may be a cover on the top of the tap that just prises out to gain access to a screw.

Les.

[Clive HartlandParticipant @clivehartland94829]

Made the sound moderator for my PCP air gun. Made from Alu. and when assembled weighs 77 grams/2.7 ounces. Shows the felt filling and you can see the radial vents from the center tube, the tube is also slotted along its length. When testing I could hear the pellet hit the backstop over the sound of the gun. I will give it a coat of high temp. paint shortly.

Clive, sorry cannot insert the image for some reason ?

Edited By Clive Hartland on 18/04/2015 16:48:01

Edited By Neil Wyatt on 18/04/2015 17:30:11

[Neil WyattModerator @neilwyatt]

I've put them in Clive.

Isn't your black camera icon working?

Neil

[brickyParticipant @bricky]

I have spent the last two hours sorting out roughly 100 plus metric hand chasers, given to me by a friend.They are stamped with the war department arrow and one is dated 1944.they range from .5mm to 5mm ,some internal but most external.I asked my friend for a 2mm internal chaser to tidy up the thread I cut for a backplate to fit my large bore Myford, and he gave me all of these.I am going to have a go at cutting the smaller sizes as I have never tried this.

Frank

[Capstan SpeakingParticipant @capstanspeaking95294]

Posted by bricky on 18/04/2015 17:57:13:

I have spent the last two hours sorting out roughly 100 plus metric hand chasers, given to me by a friend.They are stamped with the war department arrow and one is dated 1944.they range from .5mm to 5mm ,some internal but most external.I asked my friend for a 2mm internal chaser to tidy up the thread I cut for a backplate to fit my large bore Myford, and he gave me all of these.I am going to have a go at cutting the smaller sizes as I have never tried this.

Frank

Be careful. Thread chasing can be dangerous if done incorrectly.

[Ian PParticipant @ianp]

Frank

I may be wrong but I thought Myford lathes used imperial threads in which case the metric thread form chaser will have the wrong thread profile (angle).

Presumably you must have lots of duplicates as I doubt there are 100 different pitches in the range you have.

Ian P

[Mike PooleParticipant @mikepoole82104]

Myford big bore nose is M42.5x2mm pitch, even the pre big bore machines had a few metric threads to trip up the unwary, eg. Headstock mounting bolts M8, cross slide M5 and mounting holes on rear of bed M6.

Mike

[Clive HartlandParticipant @clivehartland94829]

Thank you Neil, I could not get the Pic. to move when selected, sometimes it works and sometimes not, queer. like some of the other functions on this forum that people pick up on. Now I read the destructions on the spray can, I will have to bake the painted item at 250C when I do it, that will not be popular in her kitchen. any ideas?

Clive

[Swarf, Mostly!Participant @swarfmostly]

Posted by Michael Poole on 18/04/2015 19:34:06:

Myford big bore nose is M42.5x2mm pitch, even the pre big bore machines had a few metric threads to trip up the unwary, eg. Headstock mounting bolts M8, cross slide M5 and mounting holes on rear of bed M6.

Mike

Hi there, Mike,

With respect, that is very dependent on the date of manufacture.

My good old ML7 (October 1952) has BSF threads above 1/4" and BA below 1/4".

There's a timetable of Beeston Myford 7-series design changes vs serial numbers on the web somewhere.

Best regards,

Swarf, Mostly!

[Jesse Hancock 1Participant @jessehancock1]

What did I do today? That's a good question to which the answer is not much. However I have made a start on the valves for the Sealion. I always like to start off with a minor disaster and so after bell punching the centre of the st/steel bar (perfectly) I chucked the bar and promptly broke the nose off a centre drill. No I didn't clock the bar so I gave myself 100 appropriate lines.

Gave up on using the live centre as it would leave the stem hollow on the tappet end. Yep didn't think that through either because I should have left the stem over size and trimmed back as a final op. Next problem was (of course) spring in the material necessitating taking two bites on the same setting. At first I tried ignoring the problem and resetting but this resulted in some alarming squealing noises with the tool threatening to dig in and a stall, the first I've had on the lathe…. Coffee to let the overheated electrics cool.

There's nothing like having a good struggle I say and that's what I did struggle. I changed to my Unimat 3.5mm cutting tools when nearing the final destination. Didn't even finish one valve but I do have a cunning plan for next time.

Edited By Jesse Hancock 1 on 18/04/2015 20:12:26

[Mike PooleParticipant @mikepoole82104]

Hi Swarf, yes, I should have said later models have the odd metric threads, my ML7R is early 80s and I fell into the trap of thinking the rear bed screw holes were just full of crud and ran a 1/4 BSF tap through, it took a little more than crud out of the holes, so now I have to use the harder to find BSF bolts to utilise the rear pad to mount anything now.

Mike

[JasonBModerator @jasonb]

Jesse, you don't really need to punch before you use a centre drill, if the bar is faced off then you can just drill straight in, same with a spotting drill.

I always like to leave my valves long & use a ctr for support, trim off the end with the hole as one of the last things, in a split bush of collet if it will fit.

[Jesse Hancock 1Participant @jessehancock1]

Jay B But I like using my bell punch.

I wish I could say you stole my cunning plan mate but my that is cunning. I'll have a look cobber and thanks.

One of the best mods I've seen (I think it was on here) is adding small ball bearings to a steady clamp. (I must do that one.)

Edited By Jesse Hancock 1 on 18/04/2015 20:42:38

Edited By Jesse Hancock 1 on 18/04/2015 21:00:27

[brickyParticipant @bricky]

My super seven plus is 42.5*2mm and I do have a lot of duplicates of the metric chasers ,as I didn,t have amongst these chaser the two mm internal one I had to rely on my threading ability.More luck than judgment it worked well.This was the first metric thread I have cut and I was pleased with the result.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Neil Wyatt on 18/04/2015 15:41:34:

… I suspect NASA got it wrong – I very much doubt Hasselblad did!

.

Neil,

I think I have the story now:

This is a 'Google Translate' version of an Italian web-page, which mentions that NASA ordered a batch of SuperWides with the 38mm Biogon, but then changed its mind and revised the spec.

MichaelG.

[Neil WyattModerator @neilwyatt]

Phew – that was hard going, but the final set of prints are very impressive.

Neil

[Bruce EdneyParticipant @bruceedney59949]

I melted some metal – first real outing for the home made furnace

 

Posted by Bruce Edney on Saturday, April 18, 2015

Edited By Bruce Edney on 19/04/2015 06:32:24

[Bruce EdneyParticipant @bruceedney59949]

Still a bit hot to touch yet

Posted by Bruce Edney on Saturday, April 18, 2015

[Anonymous]

Well yesterday actually. Got up early and went out to the gliding club as I was standby, ie, second, tug pilot. Discover that the second tug is phut as the front oleo has gone soft. Then I inspected and signed off as fit to fly a single seat glider where the new owner had had a rigging wobbly. One wing had fallen off a trestle during rigging and the spar end had damaged the fuselage skin. It was also my day in the Nimbus 3DT so eventually got it out and flew with my syndicate partner, taking it in turns to fly for an hour at a time. By no means a classic day; a strong NE wind which generally means sea air from the Wash will eventually kill the thermals around Cambridge. We ended up doing about 160km. We had one wobbly near Newmarket. We both heard an aircraft, but couldn't see it. Then I looked up and saw a big ex-miltary trainer doing aerobatics; going over the top of a loop and coming down towards us. Equals a left turn and exit the area sharpish. We ended up over the Newport Pagnall services on the M1 with a 45km run into a 15kt+ head wind to get back. The sky didn't look great, as it was going blue. Much to my surprise I flew back without turning, just pulling up under the wisps of cloud gained a few hundred feet and that was enough to get us to the next wisps and so on.

I even did some machining in the evening. After a few minor tool tweaks I machined about half of a batch of 5/16" BSF nuts that will hold the cylinder to the boiler on my traction engines:

The thickness of the nuts is 5/16" as per the old Whitworth standard, but the AF value is 0.525" as per the new standard, as I don't think there is enough room for the larger AF nuts. I wonder what the rivet counters will make of that. I don't have a 0.525" hex collet so I fudged it using a 15mm round collet. Time will tell if that is adequate for tapping the nuts as well.

Gardening today, and cutting the lawns.

Andrew

Edited By Andrew Johnston on 19/04/2015 11:04:17

[Rik ShawParticipant @rikshaw]

Picking up boxes of tips for pence at a boot sale is great but having to pay folding money for the appropriate holder is not so great.

So my job for the afternoon was to make a 12mm shanked holder for the tips I bought this morning.

Rik

[Martin King 2Participant @martinking2]

Hi Rik,

Any particular little tricks to making these holders as I have literally hundreds of al sorts of different tips in all sizes and shapes from all the tool lots that I get? It would be helpful to try and use a few if possible.

Regards, Martin

[Bob Brown 1Participant @bobbrown1]

Made a start on the valve spindle guides one down one to go, tricky bit of machining. When it came to the taper and end having milled the slots it needed to be supported so stuck a strip of aluminium in the groove with Loctite.

Bob

[LathejackParticipant @lathejack]

Well today, for the first time in around 25 years since I packed in bikes! I rang up about a motorcycle and arranged to go and view it tomorrow. It's a 1972 BSA single.

Since I set up my workshops over 20 years ago with machine tools I haven't had an old bike to tinker with. So if I buy it the workshop will be just the job for making all those bushes, valve guides and other bits and bobs that can be made for old British iron.

It's a far cry from all the glorious British and Japanese bikes I used to own throughout the 1980's and early 90's, but it will recapture a little of those great days. If I enjoy owning it a might buy just one more to go with it, maybe a Triumph T140 Bonneville of 1979 to 1982 vintage. That was the bike of my dreams as a teenager, and at 18 I finally bought one and owned three of them over the years, followed by a 1975 T150 Trident, what a handful that was.

[David GParticipant @davidg]

First Sunday Steam up of the year at Burton upon Trent M.E.S. Only the one loco running, several happy young passengers.

[Rik ShawParticipant @rikshaw]

Martin – re:indexable tooling and in answer to your request I will post a new thread in the next few minutes under "Workshop tools and Tooling"

Rik

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