mtt.tr
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- 8,431
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- Essex/Suffolk border
- Thread starter Kram
- Start date
grim_d
Unlikeable idiot.
- Messages
- 4,246
- Location
- Scotland - Ayrshire
Vice screw for @qwakers, EN16T. M16x4 trapezoidal. First proper metric thread cut on this machine.
Discovered today that the travelling steady I have is for a 9" L5....something else to make, it cut just fine anyway. Fits the nut lovely
Pressed the screw into an end for the handle and cut a nice groove for welding.
Welded up (not on the lathe)
All done, very happy with it.
Discovered today that the travelling steady I have is for a 9" L5....something else to make, it cut just fine anyway. Fits the nut lovely
Pressed the screw into an end for the handle and cut a nice groove for welding.
Welded up (not on the lathe)
All done, very happy with it.
mtt.tr
Member
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- 8,431
- Location
- Essex/Suffolk border
qwakers
Member
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- 2,103
- Location
- cornwall, united kingdom
Last night I resurfaced a bloomin big brake stator plate out of some tractor or other. In the 4 jaw on the Triumph, it was 24.5 inches in diameter, passed the leadscrew bu 4mm, thread cutting indicator and gap removed. Had to offset it to get it to turn and add weight to the t slots in the chuck to "balance". Took ages to clock it in, 14thou removed. It was some sort of cast steel, no dust but fine short chips.
I felt I needed an emergency stop, standing to the right of the swirling mass, with the stop lever in the firing line...
I felt I needed an emergency stop, standing to the right of the swirling mass, with the stop lever in the firing line...
Brad93
Member
- Messages
- 18,343
- Location
- Essex, United Kingdom
I’ll get you some measurements off my steady if you like.
still not managed to find a fixed anywhere yet. I’ve got a lump of 50mm Steel here that may be repurposed. Not as good as cast iron but will do the job.
grim_d
Unlikeable idiot.
- Messages
- 4,246
- Location
- Scotland - Ayrshire
Seadog
Save the planet. It's the only one with rum!
- Messages
- 12,125
- Location
- NE London - UK
A piece of steel
![20200514_175312[1].jpg](https://www.mig-welding.co.uk/forum/attachments/20200514_175312-1-jpg.230323/ "20200514_175312[1].jpg")
![20200514_212439[1].jpg](https://www.mig-welding.co.uk/forum/attachments/20200514_212439-1-jpg.230324/ "20200514_212439[1].jpg")
More later.
Also a groove in my dead centre. Why dead centres never have a tang (at least not the ones I own or have ever come across) beats me. They're a right pain to get out of the tailstock. Having a need to use one today, the thought struck me that I could use my chuck wedges if only there was slot in it.
It was hard as you like so got attacked with the angle grinder. After that it was simple to clean up the slot.
Works well.
![20200514_173410[1].jpg](https://www.mig-welding.co.uk/forum/attachments/20200514_173410-1-jpg.230325/ "20200514_173410[1].jpg")
More later.
Also a groove in my dead centre. Why dead centres never have a tang (at least not the ones I own or have ever come across) beats me. They're a right pain to get out of the tailstock. Having a need to use one today, the thought struck me that I could use my chuck wedges if only there was slot in it.
It was hard as you like so got attacked with the angle grinder. After that it was simple to clean up the slot.
Works well.
Hood
I am obsessed.
- Messages
- 17,308
- Location
- Carnoustie, Scotland
Does your tailstock not wind back far enough to eject even without the tang?
Hood
I am obsessed.
- Messages
- 17,308
- Location
- Carnoustie, Scotland
Well you never know, can't say I recall a lathe that doesn't, well except my CNC lathe but that is only because Churchill decided to fit a hydraulic cylinder to it with no ejection methodI wouldn't have bothered with the groove if it did
Hopefuldave
Intergalactic pot-mender
- Messages
- 2,545
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- The Shed of Danger, surrey, England
This week, a ittle "pot chuck" and cap to hold some taper-roller outer races so I could put a circlip groove in as a substitute for Timken 1922B flanged Imperial taper rollers, as fitted to the Holbrook lathe QCGB - and machined those, very impressed with the Horn grooving tool! Lots of glowing ribbons coming off, flying sparks, only shattered one insert 
Made a fairly hefty slide hammer with 1/2" BSF end to pull the QCGB shaft out through the rusted-on bearing races awaiting replacements, and an adaptor for the end to pull the flanged races out of the casting - obstinate blighter, result of several years with rancid stale coolant that leaked in through a missing gasket into the sealed QCGB
Got the QCGB apart though (the usual Holbrook Chinese puzzle), parts are cleaning up in the E.G.B.E.R.T.* overnight and tomorrow, housing will get a clean up and coat of paint before reassembly with fresh bearings - it was getting a bit grumbly with The World's Worst Bearings...
Dave H. (the other one)
* Electrolytic Gungy Bubbling Encrustation Removal Tank
Made a fairly hefty slide hammer with 1/2" BSF end to pull the QCGB shaft out through the rusted-on bearing races awaiting replacements, and an adaptor for the end to pull the flanged races out of the casting - obstinate blighter, result of several years with rancid stale coolant that leaked in through a missing gasket into the sealed QCGB
Got the QCGB apart though (the usual Holbrook Chinese puzzle), parts are cleaning up in the E.G.B.E.R.T.* overnight and tomorrow, housing will get a clean up and coat of paint before reassembly with fresh bearings - it was getting a bit grumbly with The World's Worst Bearings...
Dave H. (the other one)
* Electrolytic Gungy Bubbling Encrustation Removal Tank
Seadog
Save the planet. It's the only one with rum!
- Messages
- 12,125
- Location
- NE London - UK
I suppose that it's possible that the feed screw has been shortened sometime in the last 57 years, and I certainly don't have any recollections from my school days when I was using Boxfords.
It's always been like it, so I assumed that that's how it should be.
Makes perfect sense. So would you grind it making an allowance for the combination of top rake and side clearances?
Again for amateurs like me...
Hood
I am obsessed.
- Messages
- 17,308
- Location
- Carnoustie, Scotland
I wouldn't, I use insert tooling but on the odd occasion I need a special thread form then I wouldn't bother with top rake.
I have a revolving centre which used to eject at the very end of the travel, glued a ball bearing in the end and it now ejects a bit earlier. Just roll a ball bearing or two down the hole before putting the centre in.
Seadog
Save the planet. It's the only one with rum!
- Messages
- 12,125
- Location
- NE London - UK
I get bored doing that
Anyway, it's been resurrected after last night's little fiasco
It helps to lock the carriage
Better this time, some nice red hot action
The finished item
grim_d
Unlikeable idiot.
- Messages
- 4,246
- Location
- Scotland - Ayrshire
No machining as such but decided the lathe was well overdue a good bit of tlc.
Stripped everything down, cleaned and readjusted everything, pleased to report All is well with everything. Just the bed levelling to adjust as it cuts a bit of a taper.
Bit of a change to 4 years ago....
Stripped everything down, cleaned and readjusted everything, pleased to report All is well with everything. Just the bed levelling to adjust as it cuts a bit of a taper.
Bit of a change to 4 years ago....
doubleboost
Member
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- 3,801
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- Newcastle upon Tyne England
Very tidy looking thread
