BallisticExpansion
Well-Known Member
Ok guys I am back from my trip. I have some good news and not great news. Let's start with the good. The prototype wheels are done! I just picked them up and am in progress on testing them. The knurling didn't work for gripping the case so ditching that. I'm still brainstorming the solution, but I believe the Ultra copper RTV from permatex will be perfect for this application. It's affordable and good for intermittent temps up to 700deg. It also can be easily repaired by the customer as needed. I am planning to do my first heat test tonight to check how the wheels/machine heat up and how the RTV does. This first test I will be doing is 6.5CM on the large wheels which is how I previously melted my plastic wheels.
I'm still tinkering with the thickness of the small wheels. If I can get them small enough to do 300blk without too much heat transfer and also still support 30-06 I would be ecstatic. I think a 3/4" thick wheel is the ticket.
I'm scratching the big case cut on the standard wheel. When running small cases such as 223/300BLK it lets the machine double feed and jams. For those doing WSSMs/PRC or any case over a ~.49 body you will need to use the large wheels. Large will be good up to 338 Lapua and down to anything smaller that will not double feed and will clear the wheel.
Now the not great news. My machinist is not willing to run the job for mass production due to the time cost. He is running all manual machines and used a lathe and mill for these. They look very clean/nice and he does great work. However, to be frank these wheels don't need that level of precision. The only critical part is making the cuts centered. Once a machine is zeroed and jig set I believe these can be made pretty quickly by doing each operation in batches using only a vertical milling machine. Sandblasting would clean up any sharp edges and improve aesthetics. No turning as I will order the stock in the correct OD.
The other hurdle I'm facing is I don't currently own any machining equipment. I'm now shopping for a benchtop or knee size milling machine. There is going to be a time lag with all of that. Technically this job could be done with a mini mill. However, I'm trying to get something that I can use for a myriad of projects in the future for my 06/07 business as it grows. There is also a cost balance/limit as this is currently the only job I have lined up to run and sell. Using this job to pay off the machine I purchase at a minimum is my goal. I only have a partial idea of the demand for these wheels so I'm trying to err on the side of caution.
All that said... below are some pictures of the prototypes with and without RTV applied. Thanks guys.
I'm still tinkering with the thickness of the small wheels. If I can get them small enough to do 300blk without too much heat transfer and also still support 30-06 I would be ecstatic. I think a 3/4" thick wheel is the ticket.
I'm scratching the big case cut on the standard wheel. When running small cases such as 223/300BLK it lets the machine double feed and jams. For those doing WSSMs/PRC or any case over a ~.49 body you will need to use the large wheels. Large will be good up to 338 Lapua and down to anything smaller that will not double feed and will clear the wheel.
Now the not great news. My machinist is not willing to run the job for mass production due to the time cost. He is running all manual machines and used a lathe and mill for these. They look very clean/nice and he does great work. However, to be frank these wheels don't need that level of precision. The only critical part is making the cuts centered. Once a machine is zeroed and jig set I believe these can be made pretty quickly by doing each operation in batches using only a vertical milling machine. Sandblasting would clean up any sharp edges and improve aesthetics. No turning as I will order the stock in the correct OD.
The other hurdle I'm facing is I don't currently own any machining equipment. I'm now shopping for a benchtop or knee size milling machine. There is going to be a time lag with all of that. Technically this job could be done with a mini mill. However, I'm trying to get something that I can use for a myriad of projects in the future for my 06/07 business as it grows. There is also a cost balance/limit as this is currently the only job I have lined up to run and sell. Using this job to pay off the machine I purchase at a minimum is my goal. I only have a partial idea of the demand for these wheels so I'm trying to err on the side of caution.
All that said... below are some pictures of the prototypes with and without RTV applied. Thanks guys.