- Joined
- May 3, 2020
- Messages
- 229
I need to make a 1.375" hole x 5" deep in 3" 4140 round bar. I've watched a lot of David Wilks videos* lately, so I thought about making a tool. But annular cutters are available that cut 3" deep, which is also a good option.
I'd rather make something but time is relatively short and success is not guaranteed.
An annular cutter would probably be fine but I'm worried about all those teeth and swarf removal. I'd be running it on a 9x20 Harbor Freight lathe, which has limited torque. Maybe another option is but an annular cutter and remove all but 2 of the teeth.
While researching this, I found a video of some guy testing annular cutters**. He uses the 15-in Craftsman with a "1 HP" motor at 250 RPM. Under power feed, some of the annular cutters (15/16") jammed. My lathe is similar power, I think, but HP numbers can be deceiving. I've read that mag drills typically run at 375-400 RPM.
How would you approach a job like this with hobby-grade machines?
* https://www.youtube.com/@userwl2850
**
I'd rather make something but time is relatively short and success is not guaranteed.
An annular cutter would probably be fine but I'm worried about all those teeth and swarf removal. I'd be running it on a 9x20 Harbor Freight lathe, which has limited torque. Maybe another option is but an annular cutter and remove all but 2 of the teeth.
While researching this, I found a video of some guy testing annular cutters**. He uses the 15-in Craftsman with a "1 HP" motor at 250 RPM. Under power feed, some of the annular cutters (15/16") jammed. My lathe is similar power, I think, but HP numbers can be deceiving. I've read that mag drills typically run at 375-400 RPM.
How would you approach a job like this with hobby-grade machines?
* https://www.youtube.com/@userwl2850
**