Awsome vid im studying mechanical engineering and in my country the school make it sucks. I look forward to get out of the college and start having hands on experiences
@awk77hockey Well honestly you've started allready. The desire and interest to learn is were you start. Try your school and public libreary. Take out all the books you can find, ussualy the older the better. Ive found newer books assume the reader is allready coherst in the trade and they leave alot out. Search the internet for Southbend's publication called "How to run a lathe" and Atlas's version "Lathe operations and machinist tables". Probaly the best beginner books ever printed.
I rarely take over .100-.150 per pass roughing in. I had a rush job the other day and got down to the last part which was turning down the end to 1.2500 inches from 3 inches. So I start with a heavy .200 rough pass(on stress proof steel.) and the tool pushes my part in the chuck and ends up destroying. Great day.
@HWYII Yeah, it happens to everyone at some time or another. This job is running in soft jaws bored to a shoulder. The part is against the shoulder so it cant slide in. When filming this vid I set the camera on the work lamp attached to the lathe carrage. Without relizeing it the lamp was positioned to low and cracked into the spinning chuck. Sent the camera flying strait up into the air. I scrambled to catch it before it hit the floor. Coulnd'nt believe it still worked. PHEW!!!
nice camera angle, but seems like you are removing alot of stock in each pass. notice the color of the chips, meens they are really hot. meens your stock is getting really hot also. what happens to metal when it gets hot, it exspands. will make it hard to be precise on you final cut.
@rigidrider09 Thanks for the comment. Your pionts are very valid. Most of the heat is being carred away by those blue chips. You can see I remove the part immedietly after machining. The part is warm but not hot. My tolerence is +.000 -.002. From hot off the lathe to room temp it changes dia. by .0002.
@rigidrider09 As far as the depth of cut this is a moderate cut for this material. The chuck on this machine is vary thick and the part sticks out pretty far from the headstock. So I am limited to .150 doc roughing. In a thinner chuck or preferably a collet I would rough this part with one pass an a finish pass. An slightly less feed roughing. This is free machining steel. Stuff cuts like butter.
@rigidrider09 Dia doesnt change much on small solid work. Length will change alot though. Bigger dia. stuff, say 10"+ will change in dia. alot say .002 -.004 depending on temp. I have run jobs that I would rough in then allow them to cool to room temp. before finishing. I evan had a job that had to be a certain size at a specified temp. of 180* F+- 2* F Dia. tol. +.00000 -.00010 That job sucked.
@welshboy118 Glad to hear of new blood in the field. Machinist is kindof a dieing trade. Try to get under the wing of an old machinist. Listen and observe. Not nocking your school but a year under the wing of an old timer is worth years of schooling. I'm getting the feeling that you work with 0.15 mm? whitch is just under .006 of an inch. 0.15 inches is a little over 1/8 of an inch. Thats a pretty big tollerance. All the tol. in my comments were inches .00010" is .0025mm
@welshboy118 As far as that sucky job, the customer accepted it. witch is all that matters.There are so many variables that could cause a bad finish. machine condition,tool geomotry,feeds and speeds,material traits,coolants,and somtimes the alignment of the planets LOL Start with basics, properly ground tool,correct feed and speed,rigid setup like close to the chuck and supported by the tail stock if work extents more than 3 times diameter,tool hieght centered,sometimes slightly above center.
Awsome vid im studying mechanical engineering and in my country the school make it sucks. I look forward to get out of the college and start having hands on experiences
outlawed26 3 weeks ago
@joleenmorganjohn I work with this guy who complains every time i conventional mill something should i start climbing
ramcharger1907 2 months ago
@ramcharger1907 Yeah, start with climbing out from under the bosses desk! ,Chris.
joleenmorganjohn 2 months ago
Hello I am a high school student trying to Learn about lathe work and I have no idea where to start
awk77hockey 9 months ago
@awk77hockey Well honestly you've started allready. The desire and interest to learn is were you start. Try your school and public libreary. Take out all the books you can find, ussualy the older the better. Ive found newer books assume the reader is allready coherst in the trade and they leave alot out. Search the internet for Southbend's publication called "How to run a lathe" and Atlas's version "Lathe operations and machinist tables". Probaly the best beginner books ever printed.
joleenmorganjohn 9 months ago
I rarely take over .100-.150 per pass roughing in. I had a rush job the other day and got down to the last part which was turning down the end to 1.2500 inches from 3 inches. So I start with a heavy .200 rough pass(on stress proof steel.) and the tool pushes my part in the chuck and ends up destroying. Great day.
HWYII 1 year ago
@HWYII Yeah, it happens to everyone at some time or another. This job is running in soft jaws bored to a shoulder. The part is against the shoulder so it cant slide in. When filming this vid I set the camera on the work lamp attached to the lathe carrage. Without relizeing it the lamp was positioned to low and cracked into the spinning chuck. Sent the camera flying strait up into the air. I scrambled to catch it before it hit the floor. Coulnd'nt believe it still worked. PHEW!!!
joleenmorganjohn 1 year ago
@joleenmorganjohn It made for a great video.
HWYII 1 year ago
@joleenmorganjohn It made for a great video.
HWYII 1 year ago
nice camera angle, but seems like you are removing alot of stock in each pass. notice the color of the chips, meens they are really hot. meens your stock is getting really hot also. what happens to metal when it gets hot, it exspands. will make it hard to be precise on you final cut.
rigidrider09 1 year ago
@rigidrider09 Thanks for the comment. Your pionts are very valid. Most of the heat is being carred away by those blue chips. You can see I remove the part immedietly after machining. The part is warm but not hot. My tolerence is +.000 -.002. From hot off the lathe to room temp it changes dia. by .0002.
joleenmorganjohn 1 year ago
@rigidrider09 As far as the depth of cut this is a moderate cut for this material. The chuck on this machine is vary thick and the part sticks out pretty far from the headstock. So I am limited to .150 doc roughing. In a thinner chuck or preferably a collet I would rough this part with one pass an a finish pass. An slightly less feed roughing. This is free machining steel. Stuff cuts like butter.
joleenmorganjohn 1 year ago
@rigidrider09 Dia doesnt change much on small solid work. Length will change alot though. Bigger dia. stuff, say 10"+ will change in dia. alot say .002 -.004 depending on temp. I have run jobs that I would rough in then allow them to cool to room temp. before finishing. I evan had a job that had to be a certain size at a specified temp. of 180* F+- 2* F Dia. tol. +.00000 -.00010 That job sucked.
joleenmorganjohn 1 year ago
@joleenmorganjohn im studying mechanical engineering i passed nvq1 now doing nvq2, ..
and our tollerance is 0.15 +/- lol, but 0.0010 that is insane, how did it end up ? u said it sucked lmao ?
any tips for me to like i have trouble getting a good finnish on the lathe??
welshboy118 1 year ago
@welshboy118 Glad to hear of new blood in the field. Machinist is kindof a dieing trade. Try to get under the wing of an old machinist. Listen and observe. Not nocking your school but a year under the wing of an old timer is worth years of schooling. I'm getting the feeling that you work with 0.15 mm? whitch is just under .006 of an inch. 0.15 inches is a little over 1/8 of an inch. Thats a pretty big tollerance. All the tol. in my comments were inches .00010" is .0025mm
joleenmorganjohn 1 year ago
@welshboy118 As far as that sucky job, the customer accepted it. witch is all that matters.There are so many variables that could cause a bad finish. machine condition,tool geomotry,feeds and speeds,material traits,coolants,and somtimes the alignment of the planets LOL Start with basics, properly ground tool,correct feed and speed,rigid setup like close to the chuck and supported by the tail stock if work extents more than 3 times diameter,tool hieght centered,sometimes slightly above center.
joleenmorganjohn 1 year ago
This has been flagged as spam show
@joleenmorganjohn im studying mechanical engineering i passed nvq1 now doing nvq2, ..
and our tolerance is 0.15 +/- lol, but 0.0010 that is insane, how did it end up ? u said it sucked ?
any tips for me to like i have trouble getting a good Finnish on the lathe??
welshboy118 1 year ago
Can anyone tell me if 5 hours to upload a 6 1/2 min video is normal?
joleenmorganjohn 1 year ago
@joleenmorganjohn
it depends on your internet speed.
alehax27 1 year ago
@alehax27 Thanks for the answer. I figured it was something on my side.
joleenmorganjohn 1 year ago