Using the rotary axis on my CNC and Aspire from vectric.com it is fairly easy to create shapes like you've posted. And if you just need many of the same detail the design time for one will be minimal. Probotix.com where I bought my CNC has made custom machines for clients with several rotary axes attached for making several duplicate shape at the same time. If all you want to make is hammer handles you don't need a large machine. A wide machine with several 4 or maybe 5 4th axes should cost well under $10k.
To make the handles without a rotary axis a 2-sided job will be required. Getting the job time down to minimum time depends on how much sanding you want to do after the CNC is done.
If I was going to do the job for you I'd set up a fixture area on my CNC bed. Make all the blanks the same size before bringing them to the CNC. Quickly set a blank into the fixture and clamp it down then hit "R" on the keyboard to run the job. I'd do a day's worth of top sides first, then load the bottom side into the control software, stick each half finished blank upside down into the fixture and hit R again to finish the bottom sides.
I'd personally let the CNC do all but trimming the ends and final sanding and finishing.
8 minutes of CNC time might be possible with some thoughtful optimizing of the toolpaths. Leaving much to belt sand on each will likely take much more time and result in slight variances in each.
4D
To make the handles without a rotary axis a 2-sided job will be required. Getting the job time down to minimum time depends on how much sanding you want to do after the CNC is done.
If I was going to do the job for you I'd set up a fixture area on my CNC bed. Make all the blanks the same size before bringing them to the CNC. Quickly set a blank into the fixture and clamp it down then hit "R" on the keyboard to run the job. I'd do a day's worth of top sides first, then load the bottom side into the control software, stick each half finished blank upside down into the fixture and hit R again to finish the bottom sides.
I'd personally let the CNC do all but trimming the ends and final sanding and finishing.
8 minutes of CNC time might be possible with some thoughtful optimizing of the toolpaths. Leaving much to belt sand on each will likely take much more time and result in slight variances in each.
4D
