Hi, All. This is my very first post to this forum so please be gentle ![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
I'm not a machinist (yet) but really do need to pick up some basic skills. I often have the need to fabricate small, non-complex pieces for prototyping designs I've come up with. Here is my problem du jour:
I need to have 3/4" x 5 Acme threads cut into the mounting socket on a piece very much like this one:
![Umbrella_Swivel_Acme.jpg Umbrella_Swivel_Acme.jpg](https://www.hobby-machinist.com/data/attachments/16/16844-b724de0da068f230d401184bc2428202.jpg)
Depth of the socket is approximately 1-1/8". Material is cast aluminum.
I know Acme taps are available (at a steep price) but what I don't know is if an Acme thread of the required size can be tapped by hand or if a mill (or other piece of machinery) would be required to do the job. So here's my basic question: Is this a DIY task for the non-mill owning person or something better farmed out to a machine shop (assuming one could be found equipped and willing to do the job)?
Any guidance from you forum experts would be greatly appreciated.
Thanks in advance.
Dave F.
![Umbrella_Swivel_Acme.jpg Umbrella_Swivel_Acme.jpg](https://www.hobby-machinist.com/data/attachments/16/16844-b724de0da068f230d401184bc2428202.jpg)
I'm not a machinist (yet) but really do need to pick up some basic skills. I often have the need to fabricate small, non-complex pieces for prototyping designs I've come up with. Here is my problem du jour:
I need to have 3/4" x 5 Acme threads cut into the mounting socket on a piece very much like this one:
![Umbrella_Swivel_Acme.jpg Umbrella_Swivel_Acme.jpg](https://www.hobby-machinist.com/data/attachments/16/16844-b724de0da068f230d401184bc2428202.jpg)
Depth of the socket is approximately 1-1/8". Material is cast aluminum.
I know Acme taps are available (at a steep price) but what I don't know is if an Acme thread of the required size can be tapped by hand or if a mill (or other piece of machinery) would be required to do the job. So here's my basic question: Is this a DIY task for the non-mill owning person or something better farmed out to a machine shop (assuming one could be found equipped and willing to do the job)?
Any guidance from you forum experts would be greatly appreciated.
Thanks in advance.
Dave F.
![Umbrella_Swivel_Acme.jpg Umbrella_Swivel_Acme.jpg](https://www.hobby-machinist.com/data/attachments/16/16844-b724de0da068f230d401184bc2428202.jpg)