Anything smaller can be finicky and prone to breaking. I generally use a 1/8 to 3/16" bit for pilot holes in mild steels and softer metals. It's very short, so it doesn't flex or wander, and it gives me an accurate chamfer to center the remaining bits. After the center punch, I often use a spotting drill bit. It really depends on how thick your material is and how accurate you want the finished hole to be. maybe someone can direct me to a good detailed reference on the ins and outs of drilling? Decrease breakout on the backside of the part?.Improve the roundness/surface finish of the final hole?.Increase the accuracy of the hole placement?.and then what is the theory behind this, and what are the trade-offs. The previous step size should be a hair larger than the chisel point on the next size?.It depends on the final diameter of the hole.It depends on the material, use 4 extra steps for mild steel, 3 steps for Aluminum, 7 steps for brass, etc.?.start with a #80 drill, and then use three extra steps, at 10%, 30%, and 75% of the final diameter?.Start with a small pilot hole, and then increase by an 1/8" until the final size (so maybe 1/16", 1/8", 1/4", 3/8", 1/2"?).Use just one extra step (for example, one 1/16" pilot hole followed by a 1/2" drill)?.For instance, maybe the guidelines would be something like: I was wondering if there were general guidelines for how many steps you should take. My understanding as a hobbyist is that holes should be generally drilled in steps, starting with a small pilot hole, and increasing the drills in size until you get to the final size. Have any suggestions for the moderators? Please message the mods by clicking "Message The Mods" under the sidebar. Note: This subreddit is under construction. Other Subreddits you may be interested in: If mentioning gear or tools, properly describe, name, or attach photos of themįor Photos/Videos, high quality images, gifs or videos should be used. To achieve this we have some standards for submissions:Īn in depth explanation of the issue/problem We want r/metalworking to be a source of high quality content related to metalworking. Additional breaking of this rule may result in a ban. Repeat submissions or links to one's own content, sponsored sites, or company websites will be removed. R/Metalworking is not the place for self or company promotion. Welcome to /r/Metalworking, a place for hobbyists, students and professionals to discuss everything metal! Join the discord!
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |