The first time I've seen anything like this - Router Forums
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post #1 of 20 (permalink) Old 09-18-2019, 11:14 PM Thread Starter
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Default The first time I've seen anything like this

This set of low cost Forstner style bits with calibrated depth stops is new to me.


https://www.banggood.com/Drillpro-5P...r_warehouse=CN

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post #2 of 20 (permalink) Old 09-19-2019, 12:41 AM
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They seem/look robust enough Harry,but my drill press has depth-stop function so I won't be buying any. James.

You can't drive a bridge spike with a tack hammer(so I'm told)
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post #3 of 20 (permalink) Old 09-19-2019, 06:03 AM
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I could see that coming in handy if using doing production work involving cup hinges or door pulls . A lot easier to have the depth stop set on the bit than having to adjust the drill press stop every operation
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post #4 of 20 (permalink) Old 09-19-2019, 08:40 AM Thread Starter
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My own thoughts Doug.

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post #5 of 20 (permalink) Old 09-19-2019, 09:06 AM
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Interesting idea, not sure I would ever have a use for them so I'm sure I will buy a set soon.
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post #6 of 20 (permalink) Old 09-19-2019, 11:08 AM
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That's a novel idea Harry. I think you'd need to clear the chips just before the depth stop hit the surface to help insure that there were no chips under the hub of the stop.

One question I have is do those sizes correspond to anything in particular? I know the 35mm is standard euro hinge cup size but I don't know of anything that corresponds to the other sizes.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #7 of 20 (permalink) Old 09-19-2019, 01:21 PM
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Interesting depth stop idea. Here are some imperial comparisons :
10 = .3937" ( 3/8=.375)
15 = .590" ( 9/16 = .5625 ; 19/32 - .593)
20 = .7874" ( 3/4 = .75; 13/16 = .8125)
25 = .9843" ( 31/32 = .9688 63/64 = .9844)
30 = 1.1811 ( 1 1/8 = 1.125 1 3/16 = 1.1875)
35 - 1.378 ( 13/8 = 1.375)
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post #8 of 20 (permalink) Old 09-19-2019, 01:21 PM
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what ever happen to the piece of masking tape trick...
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post #9 of 20 (permalink) Old 09-19-2019, 01:27 PM
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Quote:
Originally Posted by Stick486 View Post
what ever happen to the piece of masking tape trick...
I use lots of masking tape. I even tape things shut with it.
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post #10 of 20 (permalink) Old 09-19-2019, 01:27 PM
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Quote:
Originally Posted by Cherryville Chuck View Post
That's a novel idea Harry. I think you'd need to clear the chips just before the depth stop hit the surface to help insure that there were no chips under the hub of the stop.

One question I have is do those sizes correspond to anything in particular? I know the 35mm is standard euro hinge cup size but I don't know of anything that corresponds to the other sizes.
@CC, sounds like just the sizes Ashleyj needs for his high-precision 20mm dog-hole boards - would even accommodate the LV dog hole bushings. But might not last for the number of holes he proposes. I think he also needed to limit the depth, for one of his projects?
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