Today I cut my first Thread on the Myford MF74. A 3/8 x 20TPI thread to adapt a 7/16 tool-post stud to a replacement (original, mind) top-slide that I scored from THAT auction site . . . .
I did this without the aid of a TDI cos there ain't one. Luckily I found this vid' on YouTube:
and I was away. If'n I'm honest with myself the thread was a little rough and a tad under-size but it works for all that.
In the process I learnt several things:
1) Need a protractor to help set up the correct tool-post angle for screw-cutting.
2) Cross-slide backlash is still in need of adjustment - either a new feed-screw or bush or both - the thrust-washer thing hasn't worked like it did with the top-slide.
3) Different types of change-wheel configuration can change the orientation of the reverse tumbler . . . That was a surprise!!!!!!!
4) Need some general metal stock to further practice the screw-cutting.
5) Need chalk.
That, people, is what I did today.
Thanks for all the feedback. Much appreciated
The steel core with the brass 'wrap-around' might be an answer, tbh. I could take the original peg, machine it to size then wallop! Nice idea Chris.
I wasn't sure whether it would be tensile or shear actually. It's good to know there are people here that do know what they're talking about. But John S is prolly right about it only being there to be polished if I know my friend. It's his pride, joy, girl-friend, the lot!
Price wise, if I can get him to accept round bar, the College Engineering Supply looks best value at a smidgin under £40 for one piece of 2" x 7" round. Hex-wise they only go up to 1" but you can get 2' of that for the same price . . . .
I am just finishing up my Myford MF74 Lathe and am in the process of tooling up. Am going to use the RDG 8-piece 6mm HSS tool set to start with. But that's by-the-by.
I already have a friend asking if I can make summat for him.
What he wants are two pillion-rider foot-pegs for his Harley. He wants them in hexagonal Brass but I'm wondering whether that material would be up to the job? Even if I can find hex brass in, probably, 2" cross-section.
Would Bronze be a better bet? I'm aware that in certain conditions brass can lose it's tensile strength due to electrolytic corrosion . . .
Advice please . . .
Yeah, I've seen that site, thanks
Have spent a good month looking over lathes on-line - very limited finances prevailing - and that site has proved invaluable. It was partly down to that write-up that I opted to buy the machine.
Hi Mr Mod'
Please move this thread to the correct "topic" area if I have posted it wrongly.
Have just joined MEW for fun times and friendship, maybe more
I have just bought a Myford MF74 4" Precision Lathe with splash-back/drip-tray, steel stand, all change-wheels and sundry effects from our favourite auction site for a VERY reasonable price.
It seems to have been doing the rounds for a few years but looks fairly good nonetheless . . . I'll be picking it next Sunday so I'll be biting me nails 'til then . . .
1) Without naming names, is anyone aware of this machine and it's history? Have I bought a dog? Or is it truly a bit of a bargain with good prospects?
2) Does anyone know of an extant manual for it? Original or good quality copy or even an on-line doc/pdf.
3) It seems that it has the 'short' (as opposed to Very Short) cross-slide.
Is there a major difference in dove-tail/feed-screw dimensions between that and an ML7 cross-slide? That being a lot larger/longer with lateral rather than longitudinal T-slots.
Are the dove-tails compatible or will some machining be required?
If the ML7 dove-tail is bigger can I get away with bulkier gib strips?
I have also seen vague references to mod's to the cross-feed allowing for further "reach" - Can you point me to a good posting about it, please.
4) The first job, however, is, of course, the obligatory strip-down, clean, re-paint, re-lube and assembly.
Do you have any Must Do's and Do Not's for me?
Am not a complete novice but it's been a good few years since I had hands on a lathe and this is certainly my first time on a Myford, and an old one at that.
I am sure I will come up with more questions as time goes by but these few will do for now.
Thanks in advance,