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Best Drill Bit brands
- Thread starter Kevinb71
- Start date
Cleveland is excellent.
I use PTD, Dormer, Cleveland, Titex, Triumph, and Makita bits. All of them are good if they are sharp. I haven't noticed a difference between them in terms of quality of build or longevity. However, the Makita bits cut the best; I think they use a four-facet grind. I don't think you will notice a significant difference when buying a name-brand set. Personally, however, I would avoid the typical homeowner sets at Home Depot and such.
You might consider a screw machine set, depending on your needs. The shorter bits are a lot stiffer and I use them on the lathe when I need a hole that is relatively straight. They also come in handy on the typical home shop drill press, since even the larger diameters are short enough not to require you to drop the table. I have a 115 bit PTD screw machine set that is just excellent.
You might consider a screw machine set, depending on your needs. The shorter bits are a lot stiffer and I use them on the lathe when I need a hole that is relatively straight. They also come in handy on the typical home shop drill press, since even the larger diameters are short enough not to require you to drop the table. I have a 115 bit PTD screw machine set that is just excellent.
If info is correct PTD owns Triumph
Best for what? Material? Condition? Depth?
not specific? Well, buy any branded hss, but the common sizes be sure to buy cobalt. They will work great even in STainless. Just be sure to run them correctly.....rpm and feed, too much burns, too few rubs and dulls the edge. The swarf should look golden and not curl, but brake instead. If it looks black too many rpms or poor cooling, if itmcurls give more feed. Most drill bits will cut fine 3 times its diameter in depth, after that you need pecking to clean, pecking causes uneven cut, holes may sway. Deep holes must be run straight without pecking but high pressure through spindle coolant instead. Remember tangential speed becomes 0 with a 0 radius, that equals that the center of a drill bit does not cut, if the bit is large, remove the shoulder ofmthe bit.
regards
not specific? Well, buy any branded hss, but the common sizes be sure to buy cobalt. They will work great even in STainless. Just be sure to run them correctly.....rpm and feed, too much burns, too few rubs and dulls the edge. The swarf should look golden and not curl, but brake instead. If it looks black too many rpms or poor cooling, if itmcurls give more feed. Most drill bits will cut fine 3 times its diameter in depth, after that you need pecking to clean, pecking causes uneven cut, holes may sway. Deep holes must be run straight without pecking but high pressure through spindle coolant instead. Remember tangential speed becomes 0 with a 0 radius, that equals that the center of a drill bit does not cut, if the bit is large, remove the shoulder ofmthe bit.
regards
I guess that what I was looking for is probably longevity with proper use and ability to hold a sharp edge. It just seems that what i have been using just won't stay sharp. Maybe it's me, but wanted to see if anyone thought that say "PTD" was worth the extra money. I think i will try a couple of PTD in my most common size. Their name keeps coming up here. Thanks for your input guys!
http://its.fvtc.edu/machshop1/drillpress/cutspeeds.htm
Just make sure your using the bit the way it was intended. Correct bit for the material and proper speeds. Any bit will dull if used improperly.
Just make sure your using the bit the way it was intended. Correct bit for the material and proper speeds. Any bit will dull if used improperly.