Hi all,
Here's a quick and easy project where I made some "self locking" height adjustment knobs for my lathe's quick change tool holder.
Thanks!
https://www.youtube.com/watch?v=F0ZV...oyt8ScR4AaABAg
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Hi all,
Here's a quick and easy project where I made some "self locking" height adjustment knobs for my lathe's quick change tool holder.
Thanks!
https://www.youtube.com/watch?v=F0ZV...oyt8ScR4AaABAg
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Thanks hersch_tool! We've added your Lathe Tool Height Adjuster to our Lathe Accessories category,
as well as to your builder page: hersch_tool's Homemade Tools. Your receipt:
<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-lathe-tool-height-adjuster"> <img src="/uploads/261175/homemade-lathe-tool-height-adjuster.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-lathe-tool-height-adjuster">Lathe Tool Height Adjuster</a> <span> by <a href="https://www.homemadetools.net/builder/hersch_tool">hersch_tool</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/lathe'>lathe</a> </div> </div> </div> </div>
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If the tool height is such that the locking screw faces the post, do you have access for Allen key?
Nice and impeccable workmanship. Permissible is what likes.
But I would be annoyed by the nut's dead angle the allen key requires.
Why not (e.g.) slit a larger ø nut laterally and clamp/brace it with an axial allen screw?
We know this principle from 'playless' spindle nuts.
This is definitely the most asked comment on the video, and a great question.Quote:
Originally Posted by yair feldmann
The short version is, no it's a design flaw for sure.
However, it's not a show stopper.
You can just lift up the tool holder to get access and tighten, or add a washer to clock it in a different location, etc.
But the long version is, I'm gonna use these initial 3 for a little while taking note of this and any other issues I notice and then make a version 2.0 that addresses all of the issues in the future.
I already have some ideas for the next version.
Thanks very much for the watch and comment :)
You sure were patient repeatedly answering that same point in the YT comments. It's a good demonstration of Cunningham's Law though.
I to am frustrated by the current jam nut version. Seems to fiddly. So I hope to make a few of these for my most commonly used holder and see how it goes. Bet it goes much better than what is currently used. Basically, it's the answer to my problem. Thanks.
Haha, I've never heard of that before, but it's 100% accurate.Quote:
Originally Posted by Jon
My wife said something similar, "I guess you can use YouTube as a way to check for flaws in your tool designs!" lol
Always looking for the bright side.
And yeah, I figure folks don't read other comments very often.
And I'm just grateful that they watched my video and took the time to post a comment, so it doesn't bother me so much when I look at it that way.
Cheers!
HERSCH
Hi Hersch, Thanks for sharing your tool height adjuster.
With your tool height set precisely, how do you lock the adjusting ring if position of hex lock screw is hidden by tool-post lock handle?
Or do you set the height to the closest 1/2 turn?
Maybe I the odd one out here (it does seem to happen) but I see no problem with the as supplied version that can't be fixed by the removal of the washer between the two nuts. Lock nuts should jam together, a washer in between destroys that. Remove the washer and the system works fine.
Congratulations hersch_tool - your Lathe Tool Height Adjuster is the Homemade Tool of the Week!
Another clever solution for getting rid of a wrench, and an excellent instructional video too.
Some more good builds from this week:
Bench Vise S-Hooks by rgsparber
Electric Lifter Table by Kwandotechnic
Helical Milling Clamps by Occasional machinist
Adjustable Bender by orioncons36
Bandsaw Roller Base by Frank S
hersch_tool - we've added your tool entry to our All Homemade Tool of the Week winners post. And, you'll now notice the wrench-on-pedestal award in the awards showcase in your postbit, visible beneath your username:
https://www.homemadetools.net/forum/...OfTheWeek4.pnghttps://www.homemadetools.net/forum/...eWeekIcon4.png
I've cancelled your paid membership and granted you free lifetime membership, so you'll never have to pay for membership again.
And, you'll be receiving a $100 cash prize, in your choice of Amazon (US-only), PayPal, or bitcoin. Please PM me your current email address and prize choice and I'll get it sent over right away.
Nice work! :thumbsup:
I'm the fellow who suggested a friction element rather than a lock in the YT comments. FWIW here's a photo of my solution. On my shop-built QCTP I used a screw with a knurled nut affixed in place rather than a stud and knurled adjusting nut. I drilled a hole that overlaps the threads, and inserted a piece of o-ring to serve as a friction element. It works adequately. (I left the square head on the screw so I can use a wrench if the friction is too stiff.) I had to experiment to find a suitable amount of overlap. I don't remember where I got the idea. I think it was a commercial QCTP brochure, maybe KDK. Just another approach to the problem that's worth considering.
Attachment 46813
nlce piece of workmanship
That's certainly not a bad idea!Quote:
Originally Posted by uv8452
My initial design definitely has some weaknesses, I'll likely make a V2.0 at some point in the future where I'll address the locking screw issue and any other issues that I come across while using it.
Thanks!
HOLY SMOKES!!!!
Thank you so much!
This is a HUGE honor!
I can't believe it, I can't say that I deserve it over all of the other amazing designs and incredibly skilled craftsman on this site, but I definitely appreciate it!!!
Thank you!!!!!
Quote:
Originally Posted by Jon
Thank you!Quote:
Originally Posted by johnreich
Thanks very much, that's a very clever solution.
I am kicking around ideas for V2.0.
I'm thinking that I'll likely do a completely new design, at some point.... hahaha
Thanks again, I love your tool post btw, SLICK looking in brass!
Quote:
Originally Posted by retirand19
You are very welcome!
Thank YOU for taking the time to watch my vid, and good luck with the project. :)
Quote:
Originally Posted by mbshop
Lol, check some of the other comments, this question has been covered A LOT... :lol:
short version is, you can slide a washer underneath to re-clock the screw, or just lift the tool holder off the tool post to tighten it.
cheers!
Quote:
Originally Posted by albertq
Unfortunately, this isn't the reality in my experience.Quote:
Originally Posted by tonyfoale
Removing the washer only seems to exacerbate the issue of the entire assembly spinning together instead of locking, and it doesn't address any of the other common annoyances.
The addition of a washer appears to not be an arbitrary choice on the part of the designers, it "helps" a bit lol, but I still think the entire solution is a compromise to mass manufacturing and price.
I am surprised the idea of a flanged nyloc nut in the thread of choice has not been offered so far, its something I would consider.
It's actually mild steel. The cold blue came out a bit brownish, and I think it's a camera or lighting artifact that makes it look like tarnished brass. The washer is in fact brass though. Thanks for the compliment. The design is based on John Stevenson's well known design, and is similar to the Hardinge design as well, with the dovetail arrangement opposite of most.Quote:
Originally Posted by hersch_tool
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Thanks retirand19! We've added your QCTP Lock Screw to our Lathe Accessories category,
as well as to your builder page: retirand19's Homemade Tools. Your receipt:
<div id="blocks"> <div class="block b1 pngfix"> <div class="bimg"> <div> <a href="https://www.homemadetools.net/homemade-qctp-lock-screw"> <img src="/uploads/261305/homemade-qctp-lock-screw.jpeg"/> </a> </div> </div> <div class="head pngfix"></div> <div class="left pngfix"></div> <div class="right pngfix"></div> <div class="blockover b1 pngfix"> <div class="title"> <a href="https://www.homemadetools.net/homemade-qctp-lock-screw">QCTP Lock Screw</a> <span> by <a href="https://www.homemadetools.net/builder/retirand19">retirand19</a></span> </div> <div class="tags">tags: <a href='https://www.homemadetools.net/tag/qctp'>QCTP</a>, <a href='https://www.homemadetools.net/tag/lock'>lock</a> </div> </div> </div> </div>
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Just remember. Good engineers pay to have their designs checked and evaluated. Great engineers get it done for free!:hattip:Quote:
Originally Posted by hersch_tool
Bill
Nyloc nuts are great the first time you tighten them. But if you have to remove and reinstall/retighten them too often, they stop working as a lock nut. Says the cheap bastrich who often tries to get get by with slightly used hardware. ;)Quote:
Originally Posted by olderdan
