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Powered tapping
7
I'm sorta amazed how many youtube videos show guys tapping under power. I know it's a bit of a must in a production setting, but I was always taught to tap by hand - ideally using some sort of guide or fixture. Do you guys do a lot of tapping under power? Just the idea makes me nervous.
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Hi Mike, May I make a comment please: The original subject had nothing to do with the 7x12 mini-lathe group name. That said, since this off-topic wasn't criticized, I (and others) felt free to diverge from the original thread. I'm so sorry as well but, in the future, I strongly suggest that the threads MUST be in line with the group name and I promise I'll hardly stick to the rule. Have a nice day. Regards On 16.03.24 13:00, Miket_NYC via groups.io wrote:
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20 years ago I had no mill so had to use my lathe and a Aloris tool post and holder it work great . If did a lot would done more by using use tool holder and plate bolt to holder. I found this that may give some ideas. Dave
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Added Folder /6) EDM drawings
#file-notice
davesmith1800 <davesmith1@...> added folder /6) EDM drawings
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The Japanese was buying American before Dec 7 1941. This just sharing a machine tool photo
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I have a nice Jacob chuck buy does not take small drill and do not want modify the one on drill press. So purchased one Walmart.
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Grinding Shaper Tools
5
(I realize this is a minilathe group, not a shaper group, but there are shaper owners on here, plus many ingenious people, so I'm forwarding this post I sent to a shaper group). One advantage of a shaper over a milling machine is that to cut, say, a groove of a certain size, you don't need a specific milling cutter but can just grind a shaper tool of that size. But the disadvantage of this is that you HAVE to grind it and grind it right. I'm having problems in this area. To make, for example, a 1/4" groove tool, I have to grind a tool that's exactly 1/4" across in front, but with side relief and front relief, and tapering slightly back from the cutting edge on top. Tricky to do this right, and if I overshoot any of these, the tool isn't 1/4" wide on top anymore and I have to start again. Has anyone here developed any jigs or procedures to help grind shaper tools better? Mike Taglieri
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Machined Knurl
Machining a strait knurl is an easy and clean way to produce a knurl. It does however require a means of dividing such as using a dividing head of some type. If one uses this method it is good to not produce a sharp knurl.
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I made a knurld ring on my brass knob. but, as the result, something wrong with the knurld surface. it's not even crossing each other. How can i solve this ? i turned on my lathe with 240 RPM and fed with my hand.
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Last week, I changed the undersized, crappy radiator in my kitchen for a bigger one that heats the room much better. This involved undoing big threaded components that may not have been touched in half a century. A tool that to some extent made the job possible was a 24" Crescent wrench I bought from Harbor Freight. It cost $33, which I thought was very reasonable considering the size. Here's a picture of my newly installed and painted radiator with the giant wrench on top of it. It may have been possible to get this plumbing apart with a small wrench and a cheater bar, but it wouldn't have been EASY, which it was with this wrench. (Also, taking heating equipment apart in the wintertime is a bit risky because if you screw up, the house may be cold for a long time). I can't say any of us will ever find something on a minilathe that needs a wrench this big, but I'll find other occasions to use it, and I bet you would too. Mike Taglieri
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Here photo from How to Run a Lathe It shows two ways of threading. I have used both to me they work same.
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Looking for photo and drawings on Flame / Candle Engine. My next project wis going to a flame ? engine and looking for data. Dave
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I need to broach some keyways in gears for my lathe but need to make some guides. What is the width of the slots for type A and B guides?
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Hi I want to meet Mexican users of 7 x 12 mini-lathe. I live in M¨¦xico City, however,I don't speak Spanish. ;) First of all I need info where to go to get metal. /johannes
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Holes in cast iron
15
I inherited a nice little used milling vise from my Dad. It's been sitting on a shelf for a bit waiting for me to clean it up and put it to use. There's a couple spots where it looks like someone missed with a drill and drilled slightly into the tops of the jaws. Nothing functionally wrong with it, but once I get it apart, was hoping to do something just to make it look better cosmetically. Was thinking I could use JB Weld or maybe one of those metal-filled epoxy putties after cleaning the holes really well. Is there anything that would be longer lasting? I have an oxy-acetylene torch set and a mig welder. I assume the vise jaws are cast iron. Maybe some sort of brazing?
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interesting
3
this popped up after a tube I was watching https://www.youtube.com/watch?v=XRuKKchj7sk
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¡°Machinists Bedside Reader by Guy Lautard¡±
6
I have all three books in the series by ¡°Guy Lautard¡± I will be listing this collection on EBay tomorrow or the next day. Just a heads up if anyone is interested in obtaining this out of print series. Condition is like new! Dick
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Can You Use a Dial Caliper as ag Non-Digital "DRO?" (was "Re: LittleMachines DROs and dials")
5
Yes, I know this can be done with digital calipers. I'm talking about doing it with a non-electronic dial caliper. Has anyone done it THAT way? Mike Taglieri
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I just bought a Shars 6" dial caliper after admiring one belonging to a friend. It's probably the best and most durable dial caliper I've ever had. But I also have a Chinese dial caliper that's cheap and less solid-feeling than the Shars. So would it be practical to turn this cheapo dial caliper into the equivalent of a DRO to measure tailstock extension? This would have disadvantages compared with using a digital caliper for this, because you can't change from metric to Imperial and you couldn't hit a button to zero it. But a major advantage is that the batteries would never die. Has anybody tried this? Mike Taglieri On Tue, Feb 20, 2024 at 7:31 PM davesmith1800 <davesmith1@...> wrote: Attachments: 20240220_162703.jpg
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I have wanted a mini lathe for years to do small metal turnings around the house, things like thread cutting, radio knobs, shaft couplers, etc. I thought I could just go get a Harbor Freight lathe but I keep reading stuff about having to redo lathes even after you buy them. What's the best lathe that I can get for $1,000, one that I don't have to rebuild before I start using it? Should I spring for over $1,000 and get a Grizzly?
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