Custom Carriage Lock Screw replacement for Vevor Mini Lathe. Replacing the caphead locking screw
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- Опубликовано: 6 сен 2024
- Custom Carriage Lock Nut replacement for Vevor Mini Lathe. Replacing the Caphead locking screw how to make carriage lock nut
Beginner metal turning projects - Easy projects to start out with when first getting into hobby machining and metal turning.
Making things better than they were one project at a time.
Work using my Vevor Mini Lathe MX 400. Amateur video work and amateur hobby machinist. Learning and turning
We all started playing this game wearing the same hat that you are currently wearing, some of us were mentored while others were not, beginners still the same. There is no shame in coming up with incorrect information it’s part of the learning process. The learning curve in this particular hobby, in my opinion, is math. Some people struggle with it some don’t, I happen to be one of the students of learning who struggle with it. It’s all about having fun and perhaps learning something new with each process.
Tool height is pretty important. Parting blades are notoriously challenging. As the blade comes under load, everything between it and ways squats and twists a little, which amplifies the angle of the blade in the cut, which makes the blade chatter (even more). It's a positive feedback loop, amplifying itself.
If you turn the blade upside down and run the chuck backwards, when the tool loads up, it'll get pushed out of the cut instead getting pulled into and under. Joe Py uses the same methodology for single point threading - tool upside down, threading away from the chuck. It's worth noting: this option wouldn't be viable with a chick that threads onto the spindle. Mark Presling (retired Aussie shop teacher and YTuber) built a special tool holder to put the parting blade at the back of the ways, upside down, allowing normal chuck rotation with the same overload mechanics.
I am getting better with parting. Many of my issues have been tool height for sure and perpendicularity if that’s a word. Lol
It looks like your copper chuck jaw covers work pretty good and stay where they belong.
Metric tap drill sizes are dead easy, just subtract the pitch from the major diameter, so a M8x1.25 tap needs an drill 8mm - 1.25mm or 6.75mm. an M6x1 needs a 5mm tap drill, etc. Then just convert the metric to inches and pick your closest drill. If you pick a bigger drill it will be easier to tap, but not as deep a thread, so it might pull out in soft materials or under extreme loads. If you pick smaller you will get a 100% thread, which will be much more difficult to tap, more likely for the tap to bind up and break.
For us folks in the non-metric world you really need a set of fractional drills by 64ths, a set of number drills from 1 to 60, and a set of letter drills from A to Z. Good drills are expensive, I actually buy used drills on eBay, but even there you really have to hunt for affordable deals.
When it comes to buying taps and dies, don't buy a set. Buy them as you need them, and don't buy anything at the local box store. I personally tend to buy from McMaster Carr, because they are pretty quick and sell single quantities and small orders.
Also when buying taps I buy either spiral point or spiral flute taps. Both of those styles you don't normally need to back off the tap to break the chip. Spiral point taps push a continuous chip out the bottom of a through hole, spiral flute taps actually push the chip back up the hole, so they work good for blind holes, the chips don't pack in the bottom. You will pay $10+ for small uncoated taps (probably fine for hobby hand work) and can easily double or triple that with coatings or for larger taps. Don't even look at carbide taps, they are too brittle to use by hand, and you probably will never machine materials as a hobbyist that actually needs carbide taps.
I usually buy spiral flute taps, because then I don't have to buy two taps for through and blind holes. For bottoming taps, if you need them a standard 3 or 4 flute hand tap is fine, because they cost a bit less, and are actually only cutting a few threads at the very bottom of the hole.
Given me plenty to think about. I am in need of quality tap and dies.
Very well done! And for fun read the warning label on the Dykem if you want more kids.
Ahh the good old “overlooking warning labels mistake”. Added to the list mistakes I will learn from. I appreciate you pointing this out not only for me but everyone else not in the know.
Great content. This would have been a great project for that collet chuck you just got.
Yeah we are all going to learn together but you are on the way just we are,oh yea I want to do that too carriage lock
The best tap and die set is bought individually as you need it!!! That way you can buy quality once...and just slowly add up the tools...
Agree and this is something I have come to realize, I have a good die sets now. I will replace my taps as needed for certain projects. If my taps break or I want a better quality Tap to replace the HF ones I have. I will just keep using my existing case.
The drill bit diameter should be about 85% the major diameter of the tap, for fine threads.
The main problem I saw(from the camera angle) is far too much stickout and you need to check the blade is square to the work, EVERY TIME.
You are right, I have since had much more success and have been adjusting blade stickout to only be what is necessary and checking blade squareness to workpiece what parting. Keen observer and thansk for posting. Now that I have a bit more experience I too see just how far that blade is sticking out.
I have the same lathe and looking for a good lock. I'll be using this design.
Great, Good luck. This is holding up very well and I use it almost everytime I use the lathe.
Me too
Hi dezz, this is basically what I have done but made it out of mild steel in one piece ( curtesy of Adès Workshop utube) you could have made it a bit shorter ( 15 mm ) . Definitely better than Allen wrench. Keep up the good work.
It’s a bit tall and not quite exactly what I wanted but I really love having a permanent lock in place Vs using the Allen wrench.
Your doing a great job, but your cut off tool is to long in the holder, causing it to dive under the work, the closer the tool is to the holder the more ridged everything is.
It usually says on the tap what drill bit to use.
Just wanted to add a comment on converting metric to inches or vice versa. To get metric to inches divide by 25.4 and to get inches to metric, multiply by 25.4. not sure what graduations in millimeters are on your dials but if its 0.1 per set its about 4 thousandths or 0.003937 per step.
Nice. I am getting decent at guesstimating my cut depths. About 1/4 turn is about 5 thou or 10 total depth of cut on the work piece half a turn will hit about 20 thou. So on. Appreciate the info.
hey bud, i used to be all about those cheapo $40 compelte tap and die sets till they cost me several hundreds in parts due to incorrect specs and slop. invest in Irwin stuff and it will save you $ in the long run. i can promise this!
You are absolutely right. I bought Irwin dies and there is no comparison. They are fantastic. I need to get my taps now.
Yea the tap & die set isn’t debird
it looks likem there is a crack/fracture runing from the lock hole to the oil hole. you may need t get that looked at for repair.
ill take a closer look, I didnt notice it but it could be in the paint.
You figured it out yourself, but for viewers who are unfamiliar with metric thread pitches, en.wikipedia.org/wiki/ISO_metric_screw_thread is a possible starting point. ISO metric screws are easy to understand, which is one reason why they're used all around the globe. The major thread diameter is in the name (e.g. M8 means 8mm diameter, M12 means 12mm, and so forth), and there's one "regular" (sometimes called "coarse") and one "fine" thread pitch variant for each screw diameter. The 1.25mm pitch you found matches a regular pitch M8 screw. Common as muck, that one is. 😉
This is great information to add to the video. Thanks for sharing. Metric makes so much more sense to use...but wow are us Americans stubborn about making the switch :-) SNL did a skit recently about this called Washingtons Dream. Lol, pretty funny one.
@@deezworkshopThanks for mentioning the SNL skit. I just watched it and found it hilarious.