- Joined
- Dec 25, 2017
- Messages
- 141
I am making special pads adapted to the frame of my '55 Ford F100 to go on the two-post lift. This involves a short length of 1/4-inch wall 2x2 square tubing steel with 1.125" through-holes in one end. I will then turn a steel post to fit into the holes and weld them together. This does not require tight tolerance. The diameter is not important as I will turn the diameter of the post to match. But, every project is a learning exercise and I'd like to make it right.
I just bunged up the first 1-1/8 inch hole in the square tubing. I used a Lenox hole saw that I had sitting, unused, in a drawer. The saw made short work of cutting at 300 RPM. However, as soon as the cutter bit into the metal it went eccentric, very obviously. The mill was rock-solid. The cutter went sideways. The result is a nasty looking mess (photo). Oversize with a non-uniform diameter top-to-bottom. Clearly this was the wrong tool or technique.
How would I better approach this? I see 3 options.
1) A better hole saw. Which one?
2) An annular cutter. Which one would work with PM833TV? 2HP with VFD?
3) A boring head. I don't own one, yet.
4) ??
FYI, I do own a set of taper shank drills up to 1 inch. Those would fit in the drill press. However such large holes in the drill press usually results in exciting oscillations and oval holes due lacking rigidity. I view those drills as "lathe tail stock only"
I'll go make another 2x2 tubing section now.
I just bunged up the first 1-1/8 inch hole in the square tubing. I used a Lenox hole saw that I had sitting, unused, in a drawer. The saw made short work of cutting at 300 RPM. However, as soon as the cutter bit into the metal it went eccentric, very obviously. The mill was rock-solid. The cutter went sideways. The result is a nasty looking mess (photo). Oversize with a non-uniform diameter top-to-bottom. Clearly this was the wrong tool or technique.
How would I better approach this? I see 3 options.
1) A better hole saw. Which one?
2) An annular cutter. Which one would work with PM833TV? 2HP with VFD?
3) A boring head. I don't own one, yet.
4) ??
FYI, I do own a set of taper shank drills up to 1 inch. Those would fit in the drill press. However such large holes in the drill press usually results in exciting oscillations and oval holes due lacking rigidity. I view those drills as "lathe tail stock only"
I'll go make another 2x2 tubing section now.