What Did You Do Today (2017)

[Simon CollierParticipant @simoncollier74340]

Thank Ian for you idea, and thanks Nick for your endorsement. Losing the chuck body bore is a necessary sacrifice but I don't see how a genuine, directly threaded Myford 4 jaw could be any different. By the way, I am going to use the spare backplate for an ER32 collet chuck for the Hercus. Two chucks from one (almost)!

[Phil PParticipant @philp]

I have been over Scammonden bridge in our little open top Austin Seven, it feels like your looking down from a plane onto the motorway below, it was a bit scary actually as it was quite windy.

Phil

[Martin 100Participant @martin100]

I must have driven under that bridge on the M62 near Scammonden dam hundreds if not thousands of times over the years. Glad to wake up this morning, look out the window at the thick fog and frost, and relish the thought of not driving on a day like this. The cat possibly appreciated some company at home today. The closest I got to any engineering was glancing through MSC's latest offers (Mitutoyo digimatic coolant proof calipers 'as low as £2.23' it says on the cover ) and watching a few videos on Youtube.

[Martin ConnellyParticipant @martinconnelly55370]

Not only today's work but a few other days as well. These are the idler wheels for the UK Monowheel Team's latest design. The rim rotates on these and they each take a different load and so need different material for the spacer. Nylon, aluminium and stainless steel. The rest of the material is aluminium alloy and green oilon.

Martin

[duncan webster 1Participant @duncanwebster1]

Posted by Simon Collier 1 on 06/02/2017 20:12:37:

Thanks Swarf, I had thought about scotch keys. I know people don't trust Loctite but with this large surface area, and the access to clean it properly with acetone, I'd bet money it would take any amount of torque an ML7 could throw at it. I think the bad reputation came from the widely held mistaken idea that Loctite required a gap to fill. A close sliding or light push fit is correct, leaving only micro structure to fill.

We loctited some wheels onto axles for 5"g driving trolleys. I literally blew up my 2 te hydraulic jack trying to get them off, and they were only about 16mm dia * 16mm long.In case you're wondering how you make a jack explode, you put about 4ft of scaffolding pole on the handle and then apply my not inconsiderable weight to the end to give it a bit more umpty! The cylinder split, who knows what pressure it had in it

[Neil WyattModerator @neilwyatt]

There is loads of technical data on Loctite about.

Here's the noddy joint design guide: na.henkel-adhesives.com/us/content_data/325292_Joint_Design.pdf

And a more detailed one: na.henkel-adhesives.com/us/content_data/356776_9294_LT5021_Retaining_Brochure_F.pdf

And chapter and verse on joint strenghth for various materials/adhesives: na.henkel-adhesives.com/us/content_data/LT3771_Metal_Bonding_Guide_v5_LR404796.pdf

My view? If you wouldn't trust that chuck, I wouldn't risk flying in a modern aircraft…

Neil

[Brian HParticipant @brianh50089]

I've been turning up the chimney parts for my Burrell-Boydell whilst waiting for some Acme threaded bar and nut to arrive from the US of A.

It seems rediculous that 1/4" Acme threaded bar seems unobtainable in England whereas in America I've been able to by a 3 ft length for $14, about £11. The downside is that the postage is £50, even with the rod in 3X 1 ft pieces!!!

[HacksawParticipant @hacksaw]

I knocked out shoe puzzle before i came home . You have to get the ring off and on again . I'm sharing a pitch at a country show soon and i need to make some stuff to sell !!

 

 

Edited By Hacksaw on 07/02/2017 15:59:01

Edited By Hacksaw on 07/02/2017 15:59:15

[EmgeeParticipant @emgee]

Hi Brian, what's the chance of you getting charged VAT and customs charge on the total value including postage cost plus the PO fee for collecting the VAT ? or have you enquired ?

Emgee

[Anonymous]

Posted by Hacksaw on 07/02/2017 15:57:30:

I knocked out shoe puzzle before i came home . You have to get the ring off and on again .

Simple enough, use a hacksaw.

Andrew

[MikeParticipant @mike89748]

Bolt cutters would be quicker but, please Hacksaw, do tell us how it works before I pull out all my hair!

[HacksawParticipant @hacksaw]

Nope ,a flick of the wrist and it'll come off easily..once you've done it a few times . Get cross, and it'll lock up solid..

[HacksawParticipant @hacksaw]

[HacksawParticipant @hacksaw]

Is everyone is now in their workshop frantically making one ??

[Neil WyattModerator @neilwyatt]

Twist to put the horsehoes back to back, slide the ring around then untwist??

Bet you can't do it with the horses still attached

Neil

[HacksawParticipant @hacksaw]

I only took them off this morning !

[SteveIParticipant @stevei]

Posted by Brian Hutchings on 07/02/2017 15:34:36:

I've been turning up the chimney parts for my Burrell-Boydell whilst waiting for some Acme threaded bar and nut to arrive from the US of A.

It seems rediculous that 1/4" Acme threaded bar seems unobtainable in England whereas in America I've been able to by a 3 ft length for $14, about £11. The downside is that the postage is £50, even with the rod in 3X 1 ft pieces!!!

 

Brian,

 

Ask the seller to try USPS flat rate boxes. I've found that to be about the best value. Don't quote me but I recall the Insurance is max US$200 but you are well under that. In the past I've paid $60 for a 65Ib box of goodies.

 

Steve

Edited By SteveI on 07/02/2017 16:43:41

[Michael GilliganParticipant @michaelgilligan61133]

Today … I had a long, and very useful, telephone conversation with John Stevenson.

I think it is safe to say that we now understand one an' other much better than before.

I have also updated my 'Profile'

MichaelG.

.

P.S. this is posted for information only … Please do not 'Reply'

[JourneymanParticipant @journeyman]

Sorry I'm a bit late but I think 1/4" Acme threaded rod is obtainable in the UK try ABSSAC

John

[Donald MitchellParticipant @donaldmitchell68891]

Hi engineers, you can buy 500mm of 8mm dia ACME screwed rod for as little as £5.99 carriage paid from Hong Kong on eBay. See eBay item number 131962035250

I've had some for the brake operating screw on my 3" scale Allchin. It comes single or two start and it's stainless as well.

Donald Mitchell

Bonnie Scotland

[Brian HParticipant @brianh50089]

Quote:"Sorry I'm a bit late but I think 1/4" Acme threaded rod is obtainable in the UK try ABSSAC

John"

I don't know if it was ABSSAC I tried but I did see a price for 5 inches in St St but it would have cost me even more for 3 pieces than the quote from Wholesale Tool in the US. and some people I tried weren't interested in such a small order.

Wholesale Tool were very good and pointed out the horrendous shipping cost and use PayPal and UPS.

I have been stung for VAT etc before but at that time (if I remember correctly) it was only charged if the goods were valued at over £38.

I would have made them myself but I want to crack on and I have a worm and wheel to make, should be fun!

Brian

[Chris BarryParticipant @chrisbarry]

After a quick buzz round Manchester and over to Leeds this morning I finished turning the new toolpost mount for the multifix toolpost to go on the Harrison.

Just needs the mounting holes drilling and tapping.

[RobboParticipant @robbo]

Posted by Hacksaw on 07/02/2017 16:25:23:

Is everyone is now in their workshop frantically making one ??

I tried, but the horse wouldn't stand still for long enough

[richardandtracyParticipant @richardandtracy]

My horse fell over & got grumpy with me after I connected front left to rear right…

Regards,

Richard

Edited By richardandtracy on 07/02/2017 21:40:21

[Simon CollierParticipant @simoncollier74340]

I mounted and tested the 4 jaw chuck I had converted from Hercus to Myford (see above 2 days ago). There was a visible wobble, and TIR on the front face was at least 10 thou, so I'll have to call the project a failure. For comparison, I tested my direct mount (no backplate) 4 jaw on the Hercus: perfect, with undetectable runout on the face. I can always reclaim the chuck by chucking it in my Chinese 8" 4 jaw and bore away my Myford threaded sleeve. I suppose it was a big ask to get a precision result with such a project.

[Author]

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