- #7 [0925], 17-03-15 23:39
- #6 [呀金], 17-03-15 23:29如果不銹鋼唔夠厚, 鑽既時候會凹入去, 後面有木頂住好鑽的.
- #5 [WeWa], 17-03-15 23:23
我鑽過304不銹鋼2mm厚,超級難鑽。
後來俾朋友用銑床弄才成功。 -
- #4 [0925], 17-03-15 23:22去五金舖買鑽不銹鋼用的鈦或鈷鑽咀。
- #3 [simpleman], 17-03-15 23:11先鑽細孔,再換鑽咀鑽大佢。
- #2 [cornercube], 17-03-15 22:44义電電鑽d力度差過有線多多,
如果用埋 普通鑽鉄鑽咀 鑽極唔入唔出奇,
or try用
鑽不銹鋼 鋒鋼鑽咀 或會好dd.
最後修改時間: 2017-03-15 22:55:00 - #1 [bigapple28], 17-03-15 22:09由於閘鎖壞了,換新鎖但鑼絲位不同需孔2個新孔,本人有有線及無線電鑽,由於有缐的放左另—屋中,所巜用义電的試鑽13.9V的,已用鑽鉄的鑽咀,但鑽唔入,只係花晒,是否需要點技巧,先謝
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I headed into my highly sophisticated drill analysis laboratory (my garage) and scientifically tested four types of 3/8-in. twist bits: a $2.75 high-speed steel bit, a $6 “black oxide” bit, a $7 cobalt bit and a $9.50 titanium bit. Using each bit in a drill press, I drilled 75 holes in pine, 40 holes in oak, 20 holes in aluminum tubing, 20 holes in medium-density fiberboard and five holes in 3/16-in. mild steel.
All of them finished the test without dulling appreciably. The high-speed steel bit was a little choppy on the last 20 holes in the pine, and all the bits except the titanium one tended to wander and bore oversized holes in the aluminum. But if you're a less-than-160-hole-drilling do-it-yourselfer, working mainly in wood, you can get by with any of them. As one carpenter put it, “In my book it doesn't really matter—I usually lose them or snap them in two before they have a chance to dull.”
To complete the test, I drilled holes in the steel with each until they dulled and became useless. The score? The high-speed steel bit was shot after 20 holes. The cobalt and black oxide bits were still boring after 25 additional holes, but with substantial effort on my part. The titanium bit just kept drilling an endless line of perfect holes—my arm gave out before the bit did.
Note: A bit's composition isn't the sole determinant in how well it bores through metal. In general, bits with “flatter” tips drill quicker, last longer and have less “walk” than those with “pointier” tips.