High speed Drill bits

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daves
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High speed Drill bits

Post by daves »

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.

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PeteJ
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Re: High speed Drill bits

Post by PeteJ »

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

Post by daves »

I do have a drill press. They are used mainly for the MFH metal pieces.
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Re: High speed Drill bits

Post by gp-models »

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. ;)
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Re: High speed Drill bits

Post by daves »

Good tip, TY
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Re: High speed Drill bits

Post by PeteJ »

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

Post by Icon_Modeler »

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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Re: High speed Drill bits

Post by daves »

Thank you Pete and Derek.
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Re: High speed Drill bits

Post by daves »

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.

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Re: High speed Drill bits

Post by PeteJ »

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.
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