Overview of Chin Hung Lathe
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- In this, my first talking video, I give an overview of the lathe I do the majority of my machining on. It is a 21" swing by 67" between centres Chin Hung lathe, made in Taiwan.
I show some of the features that I like and also a clutch that I added to reduce the number of motor starts.
I recorded this long before I knew how to edit videos so it was done in one 15 minute take. Because of this I was nervous and seemed to use the word 'really' a lot. Please try to ignore this as you watch the video. Thanks for watching.
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You seem to suffer from the same TH-cam algorithm as everyone else in thinking you are the only one interested in this topic. Put your heart and sole out there, we’re all fighting the same battles and your engineering is better than you think. Keep the videos coming!
Thanks Ed, Ken
I'm in Houston Texas
What a brilliant clutch! I am so impressed. I want to do something similar on my big Daewoo, I don't have power for it. Maybe I'll steal your design!
I have a Kingston HJ1100 which is the exact same machine. It was built by Chin Hung. I love that machine. Very well built. Very accurate and smooth. A joy to use. I run it on a VFD which works really well.
I enjoyed your video. It was interesting and I learnt something. I would be interested to know what material you used for the friction plate on your clutch. Your design turned a light on for me ... Thanks and G'day from Australia.
Man that clutch set up is sweet. Awesome job. I am picking up a large older Jet lathe. Made in Taiwan also. I wish it had a clutch on it. Not a fan of all or nothing when you have a large piece chucked up and it starts to turn up quickly.
Thanks Tom. It's something I'm fairly proud of, but because it is hidden under a cover and never seems to need any attention I rarely think about it anymore. The clutch itself is sort of an all or nothing set up as the valves only control flow rate and not downstream pressure (like most valves). (i.e. they are not like an air brake valve which controls the down stream pressure depending on how far down you press the brake pedal). You can 'ride' the clutch a bit but that simply delays how long it takes the clutch cylinder to reach full pressure. It eventually does reach full pressure and then even though the clutch lever is only partially engaged the clutch will be fully engaged. Because of this it is not as smooth as riding a mechanically actuated clutch. I have added a couple of needle valves downstream of the control valves and this allows me to control how fast the clutch and brake engage. The two advantages I see with this being a pneumatic clutch are the ease of running air lines versus linkages and the fact the clutch never needs to be adjusted. I designed the piston stroke to be more than the friction material thickness. Therefore as long as there is friction material the clutch will fully engage. Thanks, Ken
Fantastic video, love the ingenious idea with the clutch. Just found your channel today and think your great at making videos. Please keep making them, it’s been a treat to come across really good channels for the first time and get to watch a bunch at once, being confined at home has some advantages Thanks !
Thanks Rodney.
thanks for your support l like. your video
hey man I got a same machine were kan l get part's por the apron
awesome design of the clutch, wd.
just curious: the pads don't seem to cover the brake disc completely, is this by design?
It wasn't by design, it just turned out that way. The brake caliper was something I had already so I made it fit in the space I had. Ken
Making that clutch is beyond me, your a talented chap for sure, nicely designed and made, and the most important it’s reliable .
Regards Alan.
Thanks Alan.
Hi Ken , that's a brilliant idea well made . Cheers .
Thanks Max Grant. Ken
That is a very neat design and execution of a retrofitted clutch set up.
Thanks for showing us.
Catching up looking at your back catalog.
Impressive. I'm sure, being out on the Canadian prairies, your community is lucky to have a versitile Machinest around.
Thanks Carl, Ken
I don't me to sound like an ass but why didn't you just put a VFD on it?
I'm not sure why I didn't consider a VFD, but it was likely due to cost. I think a 7.5 hp VFD was fairly expensive back in 2010. Once I realized I was going to have to design and build a clutch it became a bit of a mission to see if I could do it. Many of the things I've designed and built have been sold or used once and put away (i.e. tooling). With this clutch I get to use it every time I use my lathe and there is a certain satisfaction in that. Thanks for the comment. Ken
Hey Ken.
Very Good lathe.
It always comes down to the same thing with anything in life.
Pay More Get More.
Very good work making the drive clutch.
It can be a problem when setting up at home.
How to power your equipment.
I was thinking you could maybe just a soft starter.
Either Electronic ( Inverter ) or Mechanical / Electrical ( Star Delta Starter ).
Even though i have 415 volt 3 Phase i still use a Star Delta starter for my lathe more so to reduce the amount of Inrush of power that you already would know about.
Thanks for grand tour.
Regards Peter.
Hello Peter, 'Pay More Get More' or 'You get what you pay for' was a mantra passed down to me by my dad. It is a very rare occasion when I cut a corner or cheap out in my shop. I see some people do it and get away with it, but I never have that luck. The odd time I have tried to cut a corner it has blown up in my face. Over the years I have found going fast and cheap takes longer and costs more, so I don't do it. Regarding the invertor, star delta soft start, about a week after I got my clutch running on the lathe, the power company came by unannounced and put me on my own transformer. I can start and stop the motor on my lathe as much as I want and I don't affect my neighbours anymore. By the way, using 'star' in star-delta betrays you as a member of the commonwealth. We are a member as well but with our close proximity to the U.S. we call it a wye-delta. Thanks for the comment, Ken
I have a Mazac Mate. Good bit of kit.
Does it look anything like my lathe? I've heard that mine is a copy but I don't think I've ever seen a picture of the original Mazak Mate it was copied from. The Chin Hung is a nice machine and you can get spare parts for them, unlike a lot of older machines. Not only that but the spare parts are reasonably priced. I got a full set of way wipers, a coolant hose, some shear pins, keys and several oil site glasses for less than I paid for the parts manual for my U.S. built radial drill.