watch you don't start a bidding warCan we donate money to the cause in return for banning Uncle Alb's off here.... he is very old you know and past 9pm he should really be in bed asleepCurrently he seems to stay up past 12pm on this forum and no doubt plotting how he will run the country after the 12th
........ you won't win
'cos I've always functioned perfectly well on 6 hrs a night Jim
...... gives me 18 a day to be busy with .... if I go to bed 'fore I'm tired/ready I have a s**t night's sleep .... was always up for 6 when I worked .. I concede to 7.15 most days, these days
f**k me uncle Alby's back .....Somebody please change his name back. Can’t take this thread serious when it is being written by one of Del Boys relatives!!
looks like it's take the piss out o' the Druid night againJeremy wasn't it
..... getting to be a regular sport this
... 'til you try when you're building on a tight tolerance ...... was way too breezy today for me MIG ... didn't bother with any pix of the weld up process ... you've all seen me welding before 
.. suffice to say it got well vee-ed out and burnt in (as originally planned) when it comes off again for bossing up and some shiny tish .... difficult to tell which is optimum with a 'floppy leg' ATM... .. would shake 'em like a terrier with a rat 
Question not criticism, Graham. Did you consider modifying the top bracket of the SEC rather than making up the adapter?
yeh, Robert, spent a lot of time looking at it from all angles
... 80 mil pins at 18" ctrs ... 325 mm gap ... considered machining the pins down to 70 x 280 in the centre on the front pin and installing an alternate 70mm back pin ... but no room ... ctrs are so much different that even offset machining both to 70 I'd still be 30mm too much spread .... now't like having a an att. pissed about with to devalue it .... the geometry's not critical like a bucket would be ....... .... ... B20 must be the lowest build height of any hitch ... and built like the proverbial brick crapper ... I have two B20 buckets, hence the adapter route originally ... and the 'Drema's never gonna break 'em ... came off a 20t Akerman but she handles 'em well
... just getting up at 7.15 and Vicki phones to say Clara'd been up most the night, not well, so .. day off. so Ajax time after a bite of lunch 
One being Pam?where's the **** off emoji @Regy53 ......
there's been a very large pile of spoil/soil/crap/boulders in my way for some considerable time Rory
.... got 13 done, which I had cut previously ... would've cut some more, but it was dark by the time I'd gotten through the pile I already had ... job for tomorrow 'praps ..... left the Ajax set up in case ... then found a set of four I'd done ages ago, which i could've stuck on the adapter yesterday (a).. if I'd known they were there and (b).. hadn't had to dash off to collect the little 'un at 15.00 ... day shot after half an hour in the park next to the school ... internally anyway ...... they'll do though 
quiet running machine you have therewell it did stop and I ran the genny up .... after setting up for a 'boring' afternoon
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the CDS is not the 'roundest' of sections
well that'd make it three Alex
... but I ain't counting that one as a bona fide issue
one of the quietest turrets I've ever stood next to Mike .... back gear has a little tick occasionally, but direct it purrs .... that was in back gear obviously, at that speed ...quiet running machine you have there
Just been on with same job myself, last night ended up boring some 60mm holes out to 80mm in milling machine. I’m no machinist so a bit of trial an error involved with boring bar choice. I was getting a lot of chatter when taking cuts unless very small with I’d say a near enough identical setup I.e vertical boring bar and same fixture. My weapon of choice was a Bridgeport running at a bit more rpms 240 to be exact. With a 0.003” feed rate on quill, as the knee isn’t motorised. The results were slow and not very clean. Changed to a horizontal mounted cut down lathe tool fastened into holder (brazed carbide insert) and was farming along with at least 0.030” depth of cut (1mm ish for those who are metric) leaving great results still slow job though as had to bore 60mm deep each pass. Wishing I’d burnt out the bosses and welded new ones in I think?one of the quietest turrets I've ever stood next to Mike .... back gear has a little tick occasionally, but direct it purrs .... that was in back gear obviously, at that speed ...
that was 49 rpm and .016 feed rate, on the quill too, but didn't have to take a great deal out so circa 15 thou cut to get to the desired 70.2mm and only 20mm depth ....Just been on with same job myself, last night ended up boring some 60mm holes out to 80mm in milling machine. I’m no machinist so a bit of trial an error involved with boring bar choice. I was getting a lot of chatter when taking cuts unless very small with I’d say a near enough identical setup I.e vertical boring bar and same fixture. My weapon of choice was a Bridgeport running at a bit more rpms 240 to be exact. With a 0.003” feed rate on quill, as the knee isn’t motorised. The results were slow and not very clean. Changed to a horizontal mounted cut down lathe tool fastened into holder (brazed carbide insert) and was farming along with at least 0.030” depth of cut (1mm ish for those who are metric) leaving great results still slow job though as had to bore 60mm deep each pass. Wishing I’d burnt out the bosses and welded new ones in I think?
I’d be interested if you had any words of wisdom/ details of settings you were using? That would be greatly appreciated.
Regards,
Matt
and no flex in the cutter shaft .. they'll certainly do for what I want them for
Yeah cut the cheeks off the bucket and then set up in mill. Indicated center then installed boring head. Had to enlarge 4 holes as bucket originally fitted a 20ton CAT (old school) and was on 60mm, the hitachi ex165 I have recently acquired is on 80mm hence the change. Glad I acquired the bucket cheap as the jobs barely worth doing when a new 2ft bucket from Geith is less than £1000. But I enjoy the challenge. Glad I’ve got a large mig to fry it back on as the steel is 30mm not the usual 20-25mm stuff. Steel wasn’t monkey metal either! Must have a bit of age to it?that was 49 rpm and .016 feed rate, on the quill too, but didn't have to take a great deal out so circa 15 thou cut to get to the desired 70.2mm and only 20mm depth ....
could probably get away with doubling the spindle speed, but the faster you spin it the more centrifugal influence you'll get, on the vertical tool (and possible chatter) so keep the tool as short as possible ..... not so a horizontally mounted cutter though
these machined out pretty well, on one pass, but slow at that speed
I assume you're machining bucket bosses ... still in the cheeks? ... must've taken some careful setting up
small pins for a 20, yet enormous cheeksYeah cut the cheeks off the bucket and then set up in mill. Indicated center then installed boring head. Had to enlarge 4 holes as bucket originally fitted a 20ton CAT (old school) and was on 60mm, the hitachi ex165 I have recently acquired is on 80mm hence the change. Glad I acquired the bucket cheap as the jobs barely worth doing when a new 2ft bucket from Geith is less than £1000. But I enjoy the challenge. Glad I’ve got a large mig to fry it back on as the steel is 30mm not the usual 20-25mm stuff. Steel wasn’t monkey metal either! Must have a bit of age to it?
Thank you for sharing your projects I must admit I look forward to the updates, it’s clear to see the effort you put in to get good results. Keep up the good work.
surprised the Tachi is on 80s ... thought the 'Drema wears big pins at 70 mm for a 15 tonner ... be pointless otherwise .. and like the old adage says .. "if a job's worth doing, it's worth doing well " ..... an' I'm a fussy bugger anyway ... my living used to depend on stuff being right 
