Cutting gears - CNC vs laser

[m_c]

What's so special about the these gears, that you can't just buy some of the shelf ones, and modify them?

Anything steel is more likely to of been hobbed, which can still leave marks.

Nobody is quoting because it sounds like a quite time consuming and fiddly job, so it's probably not even worth their time quoting.
Rather than use a long bit, depending on quantity, you could make a jig, so you machine one side, then flip it, and machine the other side.

[Miller]

Buying off the shelf is not practical, gears have an odd bore and some of them odd tooth number.

Thanks for the suggestion johngoodrich, I will put up a RFQ. I found 1.5mm long neck bits for £15 at shop-apt.co.uk, but only 1.2mm flute length. That is 9 passes for 10mm stock, I can see why a shop couldn't be bothered at that. But I'm sure I can find better.

[routercnc]

Wonder if you had a CNC with 4th axis (i.e stepper driving a horizontal chuck bolted to the bed) and created a form tool to go in the CNC collet you could do it?

Or a manual dividing head for that matter.

So work piece is a round blank, 10mm thick, but held vertically say on a mandrel. CNC machine a valley between 2 teeth at the 12 o'clock position above the work using the form tool, then index the work around one tooth worth and continue until all teeth are cut? Then you are only reaching in by the depth of the tooth and not the width.

Or come in at the 3 o'clock position with a sideways form tool?

More ideas here [08:17]
https://www.youtube.com/watch?v=3wd8wE_VxPo

You could stack up a few parts and cut them all at once, maybe using a tailstock for support?

[Chaz]

I made custom gears before. I milled them top down with a 1mm endmill (13 mm flute).

[Desertboy]

I made custom gears before. I milled them top down with a 1mm endmill (13 mm flute).

I've seen Chaz's gear's and they were spot on, too much work for me.

Make a mold and nylon cast them is another possibility.

[magicniner]

I guess we can all wait for the RFQ to see whether they are MOD or DP and in what size, with what bore/boss etc.

I do love it when the specification of what is required is kept secret, failing to provide a good specification for quote is a major reason why companies refuse to quote :D

[Miller]

I guess we can all wait for the RFQ to see whether they are MOD or DP and in what size, with what bore/boss etc.

I do love it when the specification of what is required is kept secret, failing to provide a good specification for quote is a major reason why companies refuse to quote :D

You're being rather presumptuous. Did you express an interest in the job and you didn't get what you need?

[m_c]

You're being rather presumptuous. Did you express an interest in the job and you didn't get what you need?

I think it's what would be classed as prior experience. In business time = money. So if the person wanting the quote can't be bothered supplying all the details required upfront, that costs time. Now as somebody who occasionally quotes for jobs, I want to see the information up front, so I can make a decision on if I'm able to do it, not waste time sending PMs to get that information.

[Miller]

I think it's what would be classed as prior experience. In business time = money. So if the person wanting the quote can't be bothered supplying all the details required upfront, that costs time. Now as somebody who occasionally quotes for jobs, I want to see the information up front, so I can make a decision on if I'm able to do it, not waste time sending PMs to get that information.

Let's get this straight: all you need to know in order to see if you're interested in the job or not is in my first post. Just ask yourself few simple questions:

Am I happy milling 10mm delrin with a 1.5mm bit?
Am I happy milling 14 x 50-150mm shapes out of delrin?

If the answer is yes, you get the dxf file and that's that. You don't need to know gear profile, you don't need to know bore. What's with all this hand-holding?

[m_c]

Let's get this straight: all you need to know in order to see if you're interested in the job or not is in my first post. Just ask yourself few simple questions:

Am I happy milling 10mm delrin with a 1.5mm bit?
Am I happy milling 14 x 50-150mm shapes out of delrin?

If the answer is yes, you get the dxf file and that's that. You don't need to know gear profile, you don't need to know bore. What's with all this hand-holding?

Yes.
Yes.
I can see a dummy lying on the ground, but no hand-holding.