-Depth of center drilled hole -Causes of the breakage of center drill and solutions -Correct way of mounting the drill chuck and live center in the tailstock
How much is the length of materials before it is needed to be assisted by a live center? Is the tapering operation using the compound method is exempted by this rule? (Using Live Center) Lastly, What is the difference between dead center and live center? When to use the dead center? live center? Thank you for the answer Prof Johnny.
Hi Samuel, dead center is a solid part, care must be taken when using this center for it needs to be adjusted and lubricated occasionally as the work heats up and expand. while the revolving or live center usually contains anti friction bearings which allow the center to revolve with the work. no lubrication is required bet. the center and the workpiece, and the center tension is not affected by workpiece expansion during the cutting action.
if both dead and live centers are used for the workpiece to be held between centers, the dead center must be mounted on the headstock spindle with the lathe dog and the live center on the tailstock spindle.
live center may or may not be used in whatever turning operations including taper turning using compound rest method, there is no specific length of workpiece that requires the use of live center bec. its diameter is also a factor in determining the rigidity of the work, or we can make this as a rule, the length of the workpiece that requires the use of live center is more than twice the its diameter. but it is also good to say that your own judgement as a machinist must always be applied for a safer machining set up.
ang short course ay 6days at 8,500 ang regular training ay 2months (free training) kaya lang magkaroon habang pandemic, ay pwede anyday ay ang short course.
Thank you once again prof johhny for another opportunity you shared with us, keep going and mabuhay po kayo!
so impressive video. Continue posting more Prof!
Another very informative video, Sir! Thank u so much po!! 💗👏👐
Thank you prof Jonny
Thank you po sir!
thank you too Emmanuel. God bless and stay safe!
Tutorial paanu mag thread salamat
How much is the length of materials before it is needed to be assisted by a live center?
Is the tapering operation using the compound method is exempted by this rule? (Using Live Center)
Lastly, What is the difference between dead center and live center? When to use the dead center? live center?
Thank you for the answer Prof Johnny.
Hi Samuel, dead center is a solid part, care must be taken when using this center for it needs to be adjusted and lubricated occasionally as the work heats up and expand.
while the revolving or live center usually contains anti friction bearings which allow the center to revolve with the work. no lubrication is required bet. the center and the workpiece, and the center tension is not affected by workpiece expansion during the cutting action.
if both dead and live centers are used for the workpiece to be held between centers, the dead center must be mounted on the headstock spindle with the lathe dog and the live center on the tailstock spindle.
live center may or may not be used in whatever turning operations including taper turning using compound rest method, there is no specific length of workpiece that requires the use of live center bec. its diameter is also a factor in determining the rigidity of the work, or we can make this as a rule, the length of the workpiece that requires the use of live center is more than twice the its diameter. but it is also good to say that your own judgement as a machinist must always be applied for a safer machining set up.
Tanong ko lqng po if my branches kayu dito or affiliated school sa negros oriental or cebu .thank you sir
Hi Hernan, sorry we dont have branch. Thank you for watching and subscribing. God Bless!
@@profjohnny8624 thank u sir . May training ba kayu ngayun sa manila ?
Meron, short course at magsisimula sa lunes. July 5. pwede kapa humabol kung kelangan mo talaga.
Ilang oras at mag kano tuition? Salamat
If you dont mind please give me your cell no. so i can discuss with you in detail. thank you.
Ilang months po ang training sa inyo sir?
ang short course ay 6days at 8,500 ang regular training ay 2months (free training) kaya lang magkaroon habang pandemic, ay pwede anyday ay ang short course.
@@profjohnny8624 anu Facebook nyo sir
Training sna ako sir 6days lng.
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