Just wanted to thank you for these videos! I fancy myself having myself a decent shop of my own soon but for now I learn from kind folks that are masters at their craft like you! I'm only 37 and been in the medical profession most of my adult years but fell sick and disabled sort of overnight few years back. I'm slowly getting back on my feet but was stuck in a bed and in and out of a wheelchair for almost 2 years. If it wasn't for great guys like you sharing videos I would of lost it long ago!
I've done a bunch of keyways and rarely ever use v-blocks, I just set the shaft on a parallel, tap down till it's solid then center against vise jaws or sometimes the very small portion of shaft sticking out of the vise. This way the shaft is solidly held in place. I also step over with a smaller end mill to get the best finish (that's just an appearance item, though), and to get a truly accurate cut dimensionwise. Don't mean to sound critical, your videos are very informative and I enjoy them.
Is using the v-blocks to hold the shaft that much better of a set-up? I've always just set the shaft on parallels & squeezed it in the vise, but I'm definitely open to learning a better way.
Just an observation: On the swivel base of the vise you have no washers or chip guards under the nuts connecting the vise to the base. A washer or chip guard will keep the chips out of the working surface of the swivel base insuring a smooth and acurate swivel when needed.
Mr. Pete...what size is your center finder... I just got some Starrett 3/8 but they are pretty small and hard to see when it gets to center ?? Thanks for the videos again !!!
Keep up the bridgeport vidios! Learning something everytime. Do you have any spline cutting you do on your bridgeport? Love to see anything you could show. Thanks!
Hello Mr. Pete! I notice that when you stop your machine operation, there is still noise in the background. Is that because you are using the type of phase converter that involves a motor driving a generator? The only other thing I could think of is that you might be disengaging the clutch rather than stopping the machine. I'm a brand-new Bridgeport owner, so forgive the newbie question please. BTW, mine came with a variable frequency converter, so I use that to run off of 110V and to turn my machine off and on.
There's a chart in the Machinery Handbook under Keys and Keyways showing the correct depth to mill keyways of different sizes in shafts of different diameters.
Centering tramming with an indicator is quick and much more accurate than an edge finder. Shouldn't you use an undersized endmill first to rough out the bulk of material then use the correct size four flute endmill to size the keyway? The four flute endmill will not walk when milling as much as a two flute.
Machinists Handbook 28th Edition page 2397. Under Width of keyseat 3/16, and to the left is your diameter of shaft 5/8 (.625) . You should get 0.0144. Take .0144 and add half the diameter of your end mill .1875/2 gives you .09375 + .0144 = .10815. That is your proper depth for your key way.
I was taught to go full depth, ..otherwise your tool wear is on the bottom and your sides will have steps, go full depth with one pass. Looks like you're throwing blue chips and re-cutting chips,.it will ruin your tool in no time, [use coolant].
Well..sorry, I'll have to throw in another one in for you wannabee machinists... Do not cut shaft in the overhang position, center of the vise has the most rigidity, don't use V blocks either, ..just nicely ground vise jaws. Always go full depth and one pass using coolant, don't make blue chips.
+Konely King Not all jobs require what you said. I understand where youre coming from and for the most part I agree. But, for some jobs, the way in the video will work just fine. You're just being nitpicky.
+RumpLeINtiLINsKinnIN I have answered to the job in video, totally unnecessary cutting in the overhang position and going down in steps is wrong not matter what job you have.
yeah they are cool until u work with them. there are 15 ways to get the job done and if you cant get status quo they will use ur back to sharpen knives. machinist are the worst people on the planet.and if they know something you dont they will make you pay through ur nose.
Just wanted to thank you for these videos! I fancy myself having myself a decent shop of my own soon but for now I learn from kind folks that are masters at their craft like you! I'm only 37 and been in the medical profession most of my adult years but fell sick and disabled sort of overnight few years back. I'm slowly getting back on my feet but was stuck in a bed and in and out of a wheelchair for almost 2 years. If it wasn't for great guys like you sharing videos I would of lost it long ago!
I've done a bunch of keyways and rarely ever use v-blocks, I just set the shaft on a parallel, tap down till it's solid then center against vise jaws or sometimes the very small portion of shaft sticking out of the vise. This way the shaft is solidly held in place. I also step over with a smaller end mill to get the best finish (that's just an appearance item, though), and to get a truly accurate cut dimensionwise. Don't mean to sound critical, your videos are very informative and I enjoy them.
You've helped me by seeing another way because I wanted to be able to check before I cut
Is using the v-blocks to hold the shaft that much better of a set-up? I've always just set the shaft on parallels & squeezed it in the vise, but I'm definitely open to learning a better way.
Just an observation: On the swivel base of the vise you have no washers or chip guards under the nuts connecting the vise to the base. A washer or chip guard will keep the chips out of the working surface of the swivel base insuring a smooth and acurate swivel when needed.
Thanks so much for this; your videos are terrific for this beginner!
Why wouldn't you use a key-way cutter with Bridgeport head rotated 90 deg?
The good important point for the centre of shaft....thannk you very much.
👍
Mr. Pete...what size is your center finder... I just got some Starrett 3/8 but they are pretty small and hard to see when it gets to center ?? Thanks for the videos again !!!
By your handle here I suspect you are a Free Mason. Great work I'm not a metal worker but find it fascinating .
Ronny
@730M I always have that problem with small dia cutters. Take many light cuts with a sharp bit.
Dos the slight tool wobble effect how fast the milling tool dulls out ?
Keep up the bridgeport vidios! Learning something everytime. Do you have any spline cutting you do on your bridgeport? Love to see anything you could show. Thanks!
Hello Mr. Pete! I notice that when you stop your machine operation, there is still noise in the background. Is that because you are using the type of phase converter that involves a motor driving a generator? The only other thing I could think of is that you might be disengaging the clutch rather than stopping the machine. I'm a brand-new Bridgeport owner, so forgive the newbie question please. BTW, mine came with a variable frequency converter, so I use that to run off of 110V and to turn my machine off and on.
Yes--I had a noisy converter--got rid of it & am using a static one now. Good idea with the vfc
There's a chart in the Machinery Handbook under Keys and Keyways showing the correct depth to mill keyways of different sizes in shafts of different diameters.
Centering tramming with an indicator is quick and much more accurate than an edge finder. Shouldn't you use an undersized endmill first to rough out the bulk of material then use the correct size four flute endmill to size the keyway? The four flute endmill will not walk when milling as much as a two flute.
Also...at which point would you use a woodruff ket cutter instead of an endmill ??
very much appreciated!
what are those blocks called that are holding the stock in the vice?
V block
Another god vid. Thanks
oops, i missed it the first time. starrett v-block.
thanks again!
Great video
Im shocked at how many home shop guys cant do this, Iv done it 10,000 times.
Machinists Handbook 28th Edition page 2397. Under Width of keyseat 3/16, and to the left is your diameter of shaft 5/8 (.625) . You should get 0.0144. Take .0144 and add half the diameter of your end mill .1875/2 gives you .09375 + .0144 = .10815. That is your proper depth for your key way.
@19asres THANK YOU VERY MUCH for your support & encouragement.
Im shocked at how many home shop guys cant do this, Iv done it 10,000 times
You can cut that key in one pass.
Thanks Ill try that
Bob
In the US, what you call a slot mill is called a center cutting end mill.
@dc5000123 No idea.
I was taught to go full depth, ..otherwise your tool wear is on the bottom and your sides will have steps, go full depth with one pass.
Looks like you're throwing blue chips and re-cutting chips,.it will ruin your tool in no time, [use coolant].
BTW, that vise nut should have a washer under it.
Thanks .
can i get a handout about it
@ant2190 5 inch
Great
T=up
The depth of cut should be .108.
I have always cut the full depth in one pass....otherwise you have steps !!!
Always use a 2-flute endmill and cut the TOTAL depth in ONE pass(SLOWLY)...or else you will have steps
By Rod Inab.
Unwatchable due to the noise.
Well..sorry, I'll have to throw in another one in for you wannabee machinists...
Do not cut shaft in the overhang position, center of the vise has the most rigidity,
don't use V blocks either, ..just nicely ground vise jaws. Always go full depth and one pass using coolant, don't make blue chips.
+Konely King Not all jobs require what you said. I understand where youre coming from and for the most part I agree. But, for some jobs, the way in the video will work just fine. You're just being nitpicky.
+RumpLeINtiLINsKinnIN
I have answered to the job in video, totally unnecessary cutting in the overhang position and going down in steps is wrong not matter what job you have.
Blue chips means the heat is being transferred into the steel not the cutter. Blue chips are not bad.
yeah they are cool until u work with them. there are 15 ways to get the job done and if you cant get status quo they will use ur back to sharpen knives. machinist are the worst people on the planet.and if they know something you dont they will make you pay through ur nose.