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Thread: Miebach Colt Drill Bitt
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10th November 2018, 08:34 PM #1
Miebach Colt Drill Bitt
Years ago I bought a bunch of Miebach Colt Drill Bitts and I still use them and they are great. But I was looking to buy a few more like a 16mm bit but I get the impression that they are no longer are made - it seems that most suppliers have like only a handful of stock in limited sizes.
Have they vanished if yes what’s a high quality replacement brad point metric bit.
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10th November 2018, 09:32 PM #2
If Brett (FenceFurniture) hasn't chipped in by tomorrow, send him a pm.
Brett is the resident expert re Colt drill bitsregards from Alberta, Canada
ian
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10th November 2018, 10:17 PM #3Taking a break
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11th November 2018, 08:48 AM #4
I will say at the outset that others have far more knowledge on Colt drills that I do.
From my limited understanding, the manufacture of these drills moved from Germany to France (whether under a different company name, I am not sure, but suspect so).
I have found a source for them, but whether they are the same as the "old" Colt drills, I do know know. That said, if these are made in Europe, they should be pretty decent.
See here: https://www.fine-tools.com/bohrspiral.html
I'd be more than happy to be corrected on the above - please bear in mind this is what I recall hearing at some point in the past.
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12th November 2018, 10:18 PM #5Senior Member
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I bought some Star-M brand drills from Japanese Tools Australia at the last Timber and Wood show, and find them absolutely great. I have never found any drill that cuts as cleanly. As to longevity, I have not had them long enough to form an opinion. They are available in sizes from 3mm up to 18mm (IIRC).
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13th November 2018, 10:05 AM #6
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13th November 2018, 10:45 AM #7
Those Japanese bits look interesting but they do not come in 16mm.
Fine Tools has a good range but again the 16mm is out of stock.
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13th November 2018, 01:07 PM #8
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13th November 2018, 02:26 PM #9
I am making post and rung chairs. Just for example the Veritas Tenon cutter cuts a 3/4” about (19.05) Tenon - Can be adjusted (which will be super dried) and then I need the hole to be smaller so 19mm hole would be good
From memory Jenny Alexander suggested a 0.25mm difference between Tenon and mortice.
For a 1/4” a 6mm would be a better fit.
In the past you could just find a 3/4” drill bit that was undersized and off you go. But with modern precision machining you need a workaround.
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13th November 2018, 02:59 PM #10
I've got Colt brand Brad Point & Forstner Bits from both France and Germany, Our Partners - Home - About Our Company - Colt
thanks to a very helpful forum member, Brett, already mentioned.
I've also purchased a set of W.L.Fuller made in the USA set which are equally as good, W.L. Fuller Inc. - Tools to cut woods, plastics, and metals.
though the exchange rate at present would be the killer for them.
Cheers, crowie
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13th November 2018, 03:21 PM #11
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13th November 2018, 05:27 PM #12
I needed a 19 for some reason 16 got into my head. 1 mm diffence is to much 0.25 is about the sweet spot. Then Tenon is super dry 2-3% the mortice is wet 15% their is a fair amount of compression in wood however when the Tenon goes into the mortice it sucks up water and expands however if to tight the Tenon can split the mortice as the Tenon increases its moisture levels.
Also it’s hard enough pushing an oversized Tenon into the mortice with a 0.25mm difference. 1mm would be impossible and that is with no glue.
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13th November 2018, 09:12 PM #13
I meant using both a 15 mm drill and 15 mm tenon cutter.
similar for 19 mm, would a 20 mm pairing work?
13/16" = 20.64 mm and is available from Lee Valley and Dictum carries 20 mm Fisch tenon cutters https://www.dictum.com/en/circle-cut...e-20-mm-707053regards from Alberta, Canada
ian
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13th November 2018, 09:56 PM #14
If you were using glue and dry wood then yes Tenon & mortice can be the same the size.
If you using greenwood then the Tenon needs to be a touch bigger. In imperial they would say a fat 3/4” Tenon.
I already have the Veritas Tenon cutters. They are good in that while they stipulate that a cutter is 3/4” the blade shifts so you can make a thin or a fat 3/4” Tenon.
So if I was an imperial user then I could use a standard 3/4” drill bit and just make a fat 3/4” Tenon. However I prefer to have a metric drill bit then adjust my Tenon to be a little fat metric.
I have made post and rung chairs before and I am planing to make some more soon. The last one I made had no glue and the joints are as solid today as they were three years ago and that’s with daily use.
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13th November 2018, 10:16 PM #15regards from Alberta, Canada
ian
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