High speed Drill bits
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High speed Drill bits
Looking for recomendations on high speed drill bits. The ones I have purchased on Amazon are very brittle and brake off easly.
Need sizes .05mm thru 2.0mm.
Dave
Need sizes .05mm thru 2.0mm.
Dave
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Re: High speed Drill bits
More than likely the ones you got from amazon are carbide. Yes, they are very brittle. If you have some kind of drill press set up(there are a lot in hobby sizes) they they are great because they retain an edge for a long time. What you hare looking for is a wire gage steel bit. This will be fairly cheap, but for plastic, they work fine.
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Re: High speed Drill bits
I do have a drill press. They are used mainly for the MFH metal pieces.
Re: High speed Drill bits
Every drill bit in that size is very fragile to handle, mainly those under 1mm. I tested cheap and expensive once when i had to drill 0,3mm holes but i found no difference.
Best advise is to use a drill fluid, even salat oil helps in this case, it cools down the drill bit and makes drilling easier in my opinion.
Maybe this helps to fix your issue.
Best advise is to use a drill fluid, even salat oil helps in this case, it cools down the drill bit and makes drilling easier in my opinion.
Maybe this helps to fix your issue.
Take a stand!
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Re: High speed Drill bits
Good tip, TY
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Re: High speed Drill bits
David, sorry, I didn't pay attention to the initial post. Didn't pickup that it was you. Now I see what you are doing. These are where I get mine. https://www.mscdirect.com/browse/tn?sea ... 20Keywords I buy the Kyocera brand. They seem to be well manufactured and stay very sharp. I use the Sherline sensitive drill attachment in my mill. Keeps the bits straight and gives me very good control over pressure I am putting on the bit.
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Re: High speed Drill bits
I've posted this before. Maybe it will help, Get a bar of soap, can be any type. Plung the drill bit into the bar of soap and then drill your hole. Repeat! The soap works as a lubricant but will not contaminate the metal part for painting like an oil potentially will. I use a pin vise not a power drill. If you are using a power drill and holding the part by hand use at your own risk. I have drilled hundreds of holes using the same bit using a bar of soap. Before using the bar of soap I might have gotten 10-20 holes before it loaded up and broke. Good Luck!!
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Topic author - Major Constructor
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Re: High speed Drill bits
Thank you Pete and Derek.
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Topic author - Major Constructor
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Re: High speed Drill bits
You are never too old to learn something new. After 30 years of fine scale modeling, thanks to Derek I learned a new and proper way to drill. I just drilled over 20 holes of various sizes on the MFH 962.
Did not break one drill bit. I pulled the drill bit thru a soap bar and used the pin vise for most of the holes. I still like my Micro Mart drill press, but will use it with more caution.
Thank you again Dereck.
Dave
Did not break one drill bit. I pulled the drill bit thru a soap bar and used the pin vise for most of the holes. I still like my Micro Mart drill press, but will use it with more caution.
Thank you again Dereck.
Dave
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Re: High speed Drill bits
Derek is spot on about chips loading up and breaking the bit. The general rule of thumb that I learned from someone(could have been Derek) is drill to a depth of twice the diameter of the bit and pull it out to clear the chips. I've used soap to drive in screw in hardwood and it is a great lub. On the mill I use Anchor Lube which is a thin green paste. It is water soluble and just a touch on the tip really makes drilling far easier.