- Joined
- Aug 31, 2014
- Messages
- 50
Hi, a while ago I posted questions about wheel spacers I want to turn. I got very nice info.
I made the mistake to make the ID 25mm, now I must turn it out to about 120mm. The OD is about 240mm, but it is cut very rough with a cutting torch. I chucked it in my 4 Jaw and are busy turning the ID to size. For the OD you suggested a RPM of about 38 RPM. For the ID, I am currently running at about 380 RPM. I cannot go much faster than that because the "disc" is not cut very even, and I get vibration. When the ID is to size i will clap it in the 3 Jaw and start on the OD. The problem is it is going VERY Slowly, I am taking about 0.8mm cuts at a time. the Feed rate is about .13mm/rev. I am using a Brazed Tip Boring Bar. I am at about 74mm on the first disc, and it is taking forever. If I use a Index-able Carbide tip Boring Bar at about 380 rpm, what cuts should I be able to take without braking my tips. On the Brazed tip Boring Bar I have quite a bit of Chatter.
Sorry for the metric dimensions.
I made the mistake to make the ID 25mm, now I must turn it out to about 120mm. The OD is about 240mm, but it is cut very rough with a cutting torch. I chucked it in my 4 Jaw and are busy turning the ID to size. For the OD you suggested a RPM of about 38 RPM. For the ID, I am currently running at about 380 RPM. I cannot go much faster than that because the "disc" is not cut very even, and I get vibration. When the ID is to size i will clap it in the 3 Jaw and start on the OD. The problem is it is going VERY Slowly, I am taking about 0.8mm cuts at a time. the Feed rate is about .13mm/rev. I am using a Brazed Tip Boring Bar. I am at about 74mm on the first disc, and it is taking forever. If I use a Index-able Carbide tip Boring Bar at about 380 rpm, what cuts should I be able to take without braking my tips. On the Brazed tip Boring Bar I have quite a bit of Chatter.
Sorry for the metric dimensions.