The dimentions for making the form tool to make the gear cutter are taken from Gears and Gear cutting by Ivan law. The size of the tool to make the cutter depends on the number of teeth and DP of the gear you want to cut and needs to be calculated from the formula given. If you want to cut bevel gears then the size and depth of cuts need to be calculated from the bevel gear section of the book.
@myfordboy Just to clarify then. When you set the depth of cut at .072 as shown on the digital readout, you are actually moving the Y axis and not the Z axis as it states in the video? Also is the purpose of offsetting the cutter is to give the gear teeth a taper? Since you made the cutter for this gear it doesn't seem that it is to widen the space between the teeth otherwise you would have made the cutter wider. Thanks for sharing your knowledge!!!
@TinkeringJohn sorry my last reply and the video caption is wrong. . Work is centred with tool with Z. Y is adjusted until tool just touches. Work is moved away in X direction. Then the 0.072 depth of cut is put on in Y. Cut is made with X after lowering the work the calculated amount.
The finished teeth have a parallel depth but are tapered from outside to inside. I hacve added a correction to the video, thanks for pointing this out.
I've been writing g-code programs for my sherline cnc mill. At 2:31 in your video you say to adjust the z axis to bring the cutter up to the blank. According to the right hand rule for axis directions, the z axis is the height of the spindle which you moved to get the center of the cutter in line with the center of the blank in the dividing head. When you are moving the table to get the cutter to touch the blank and set the depth you are moving the y axis and moving the x axis to cut the gear.
If the cutter were mounted concentricaly there would be no clearance or relife for the cutter. You would in effect be just feeding in a revoling disc with a notch in it, not a cutting tool.
Sorry for the dumb question, but can you explain why the cutter is mounted on an eccentric arbor? Couldn't it cut as well mounted concentrically? I have not cut any gears myself, but I would like to know how; and with this video and the one of making the gear cutters it seems approachable now. But I am mystified by the eccentric arbor.
@devers6 he placed the cutter eccentrically, with the cutting point at the top of the eccentric (largest diameter). By installing it this way the back of the cutting edge of the cutter will always be lower than the tip, therefore it will never rub the cut surface.
Yet again, I am amazed. I'm sure all the things you do are really not that big a deal to you, but I'm fascinated by it. I only wish I could work with you for about a year and learn about all these things. I've learned so much from your videos already. Thanks for making them. Can't wait to see the next one.
The dimentions for making the form tool to make the gear cutter are taken from Gears and Gear cutting by Ivan law. The size of the tool to make the cutter depends on the number of teeth and DP of the gear you want to cut and needs to be calculated from the formula given. If you want to cut bevel gears then the size and depth of cuts need to be calculated from the bevel gear section of the book.
myfordboy 6 days ago
do you mind giving me the blue prints for this???
people992003 1 week ago
@people992003 What blueprint are you asking for?
myfordboy 1 week ago
@myfordboy for the tool you made and the dementions on the part you were making
people992003 6 days ago
Excellent!
J800613 1 week ago
Wow, very nice job for a cutter you made yourself, I love your work.
astriknon 3 weeks ago
WOW... I've watched a few of your video's, and with every other video I see my jaw drops further and further to the floor...
Your craftsmanship and ingenuity are truly amazing and inspiring...
Thank you so much for these video's...
1951split 3 months ago
@myfordboy Just to clarify then. When you set the depth of cut at .072 as shown on the digital readout, you are actually moving the Y axis and not the Z axis as it states in the video? Also is the purpose of offsetting the cutter is to give the gear teeth a taper? Since you made the cutter for this gear it doesn't seem that it is to widen the space between the teeth otherwise you would have made the cutter wider. Thanks for sharing your knowledge!!!
TinkeringJohn 4 months ago
@TinkeringJohn sorry my last reply and the video caption is wrong. . Work is centred with tool with Z. Y is adjusted until tool just touches. Work is moved away in X direction. Then the 0.072 depth of cut is put on in Y. Cut is made with X after lowering the work the calculated amount.
The finished teeth have a parallel depth but are tapered from outside to inside. I hacve added a correction to the video, thanks for pointing this out.
myfordboy 4 months ago
I've been writing g-code programs for my sherline cnc mill. At 2:31 in your video you say to adjust the z axis to bring the cutter up to the blank. According to the right hand rule for axis directions, the z axis is the height of the spindle which you moved to get the center of the cutter in line with the center of the blank in the dividing head. When you are moving the table to get the cutter to touch the blank and set the depth you are moving the y axis and moving the x axis to cut the gear.
TinkeringJohn 4 months ago
dude.. simply amazing.
goofy775 11 months ago
good work where did you learn your trade at.
I took mine at the wayne tool company back in the 70s
rjmars1 1 year ago
@rjmars1 I am self taught. Elecrical work is my trade.
myfordboy 1 year ago 4
respect from me
zmajmr 1 year ago
If the cutter were mounted concentricaly there would be no clearance or relife for the cutter. You would in effect be just feeding in a revoling disc with a notch in it, not a cutting tool.
myfordboy 1 year ago
Hello,
Sorry for the dumb question, but can you explain why the cutter is mounted on an eccentric arbor? Couldn't it cut as well mounted concentrically? I have not cut any gears myself, but I would like to know how; and with this video and the one of making the gear cutters it seems approachable now. But I am mystified by the eccentric arbor.
devers6 1 year ago
@devers6 he placed the cutter eccentrically, with the cutting point at the top of the eccentric (largest diameter). By installing it this way the back of the cutting edge of the cutter will always be lower than the tip, therefore it will never rub the cut surface.
2008koss 4 months ago
well that's great
we all have those buzzing things at home don't we
assa123assa123 1 year ago
Excellent video mate I understood everything, being new to machining this is a great help to me
caemaridwn 1 year ago
100 point of 100! nice work, nice tools!!!!!!
this is a perfect work!
creatings from germany!
firelord3377 1 year ago
your just using a rotary table for that right?
mog5858 1 year ago
@mog5858 Its a rotary table with a dividing attachment.
myfordboy 1 year ago
very nice
lona107 1 year ago
Excellent video! Did you cast these gear blanks or did you have them made for you?
I only ask because cast iron requires a lot more heat than what I believe your furnace can manage.
nortonfan100 1 year ago
@nortonfan100 I cut the blanks from a meehanite bar.
myfordboy 1 year ago
very good photography!
Axbent 1 year ago
Yet again, I am amazed. I'm sure all the things you do are really not that big a deal to you, but I'm fascinated by it. I only wish I could work with you for about a year and learn about all these things. I've learned so much from your videos already. Thanks for making them. Can't wait to see the next one.
gblpst81 1 year ago
great work ! im an engineering student myself and i love watching your videos, love the work, keep it up ! :D
ani4al 1 year ago
Beautiful craftmanship! I like it alot.
pansartekniker 1 year ago
nice mini lathe....nice beveling..
Dragonstud 1 year ago
truely a thing of beauty.
glad i had a chance to see it made.
thank you :-)
catman72 1 year ago
Comment removed
zapwatt 1 year ago
Thanks for sharing this, I'm sure it will never come in handy for me personally but I enjoy seeing the process and final product.
Please keep the videos coming.
Doc40 1 year ago