Search found 527 matches

by Magicniner
Wed Feb 05, 2020 5:15 pm
Forum: Lathes
Topic: Considering a DRO
Replies: 32
Views: 3313

Re: Considering a DRO

Always good to know your history, the screw cutting lathe originated in the 18th century :D
by Magicniner
Tue Feb 04, 2020 9:55 pm
Forum: Lathes
Topic: Change lead screw to metric?
Replies: 29
Views: 1764

Re: Change lead screw to metric?

Calculating the gear train is the easy part. Coming up with a solution that physically fits on the banjo is the hard part. Ah, but nThreadsP gives you lots of options, it gives you all the possible options with your set of gears, it even allows you to choose to allow an acceptable error if you so w...
by Magicniner
Tue Feb 04, 2020 4:55 pm
Forum: Lathes
Topic: Considering a DRO
Replies: 32
Views: 3313

Re: Considering a DRO

The harsh reality is that not everyone has need (nor desire) to master machining. For some folks, their machine tools are nothing more than a means to an end---they want to build a widget, and machine tools are required. They have no aspirations of becoming a machinist, and have little interest in ...
by Magicniner
Sun Feb 02, 2020 1:05 pm
Forum: Lathes
Topic: 5C collet chuck
Replies: 10
Views: 1587

Re: 5C collet chuck

Go ER40 instead, it's far less limiting and contrary to the opinion of those who haven't used one you can turn square, hex, octagonal and tapered stock in ER40 collets
by Magicniner
Sun Feb 02, 2020 1:01 pm
Forum: Lathes
Topic: Considering a DRO
Replies: 32
Views: 3313

Re: Considering a DRO

I question the need. I was trained on manual machines and have never used a DRO. Seems to me like a lot of money to spend with not such a great return, but then I have the utmost confidence in my ability. That didn't come fast, or easy. H I thought exactly this way until I used a DRO, in conjunctio...
by Magicniner
Sun Feb 02, 2020 12:54 pm
Forum: Lathes
Topic: Change lead screw to metric?
Replies: 29
Views: 1764

Re: Change lead screw to metric?

NthreadP is a calculator which takes your driving gear size. lead screw pitch, your available change gear sizes and calculates the gear possible trains for the thread of your choice. http://www.lathes.co.uk/latheparts/page14.html I use it to cut metric and imperial threads on my change gear Myford S...
by Magicniner
Sun Feb 02, 2020 12:43 pm
Forum: General Discussion
Topic: Creating a GROOVE inside a very small TUBE (on the lathe)...
Replies: 13
Views: 1349

Re: Creating a GROOVE inside a very small TUBE (on the lathe)...

Iscar MGCH06 bar and the appropriate GIQR8 grooving cutter/insert good for holes down to 8mm on the lathe For cutting plastic and the forces involved you could make your own holder rather than buying the MGCH06 bar, you can buy individual GIQR8 grooving cutters for a few dollars. https://www.google....
by Magicniner
Sun Feb 02, 2020 12:36 pm
Forum: General Discussion
Topic: Center Drill Tip Broken Off In Hole
Replies: 34
Views: 1794

Re: Center Drill Tip Broken Off In Hole

Drill under size from the opposite side and punch it out.
by Magicniner
Sun Feb 02, 2020 12:32 pm
Forum: Home Shop CNC
Topic: Machine Run Time
Replies: 9
Views: 932

Re: Machine Run Time

I built a pulley driven high speed spindle (30,000rpm) from an ER11 collet chuck on a 10mm straight shank and ran it from the main 7000rpm spindle of my machine with a pulley and round polyurethane belt. Once you grasp the concept it's not difficult to design something to suit any machine.
by Magicniner
Fri Nov 29, 2019 12:39 pm
Forum: General Discussion
Topic: Rough cuts first?
Replies: 3
Views: 1035

Re: Rough cuts first?

Roughing cuts are to remove a large amount of material quickly before finishing, if they cause issues with flex or resonance it's either not appropriate for the job or alternate tooling/techniques are required. I make a Titanium part which reqires a 2" length of 1/4" material to be reduced to just o...
by Magicniner
Sun Oct 27, 2019 4:14 am
Forum: General Discussion
Topic: Dead Buffer Starter
Replies: 15
Views: 2737

Re: Dead Buffer Starter

Put it back! It was a safety device to reduce the risks involved in using such a dangerous bit of equipment.
by Magicniner
Tue Oct 01, 2019 11:44 am
Forum: General Discussion
Topic: Harbor Freight 6000-Pound Lift Thoughts
Replies: 27
Views: 6644

Re: Harbor Freight 6000-Pound Lift Thoughts

RONALD wrote:
Tue Oct 01, 2019 9:25 am
I have three Harbor Frate Lift tables, and they all have one problem, when you pump them up to a desired height, they slowly go back down.
What happens that makes them safe in the event of a major hydraulic failure?