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Thread: Auger Bit's What do they fit
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21st June 2019, 01:03 PM #1
Auger Bit's What do they fit
Not sure if this is the ideal area to post this but hopefully someone can help me ID these bits.
Augers-001.jpg
I thought they were a MT1 but when I got them home the taper is much smaller and obviously screw into whatever they are mounted on. I was thinking they might belong to some sort of doweling machine.
Any help would be much appreciated.
Gaza
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22nd June 2019, 11:08 PM #2Taking a break
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The tip thread has been ground off a few of them, so dowelling/drilling machine sounds reasonable to me.
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24th June 2019, 09:17 AM #3Try not to be late, but never be early.
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The lead screw being ground off probably means they've been re-purposed from a hand operated machine to motorised. Has the top one got a pin holding the bit in the taper?
Cheers,
Geoff
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25th June 2019, 06:47 PM #4
Yes Geoff..... They are an odd taper as well.. smaller than a MT1 and threaded.... possibly to use a draw bar on. Some of them have significant wear on the taper ... indicating that they were possibly not locked down that well at times and were allowed to spin. When I bought them I was thinking they were a MT1 and may have been useful on the lathe. Except the one with a pin in it all of them are the same size.... Being so short I was thinking some sort of CNC type machine.
Gaza
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25th June 2019, 08:06 PM #5Taking a break
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I wouldn't be surprised if they pre-date CNC, I'd be more leaning towards a pneumatic borer/doweller.
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30th June 2019, 10:31 AM #6Try not to be late, but never be early.
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I was researching Morse tapers a few weeks ago and I came across this interesting conversation on another forum. Well worth a read in my opinion, although it probably doesn't answer your specific question Gaza.
https://www.practicalmachinist.com/v...tapers-345584/
Cheers,
Geoff.
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30th June 2019, 02:19 PM #7
Good point. I wonder if they might be off something like a solid chisel mortiser?
I have a Carron "Colonial' solid chisel mortiser which, along with the solid chisels, also originally came with drill bits.
CarronV1a.jpg
In the bottom RH corner you can just make out, next to the chisels, 5 boring bits (plus one in the machine). The boring bits are turned by this somewhat crude crank handle.
CarronV2.jpg
Mine came with a set of chisels...
CarronV5.jpg CarronX7.jpg
...but alas, no boring bits (unlike this post ).
The chisels are held in by a taper (not standard Morse).
CarronV6.jpg
And I always wondered how the boring bits would withstand the torque and not rotate. I would guess those bits of yours may be the answer. Wind them in by the thread until the taper seats home (you can't do that with the chisels as they wouldn't necessarily seat home square to the workpiece).
When I get a chance later, I'm off to check to see if there's a thread above the female taper.
Cheers, Vann.Gatherer of rustyplanestools...
Proud member of the Wadkin Blockhead Club .
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30th June 2019, 04:32 PM #8
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30th June 2019, 04:44 PM #9
Hi Vann...... On my FW Renolds mortiser.... The drill bits are a standard 1/2'' Round with a flat on one side that a square head grub screw tightens down on. The chisels that I got from the UK( That was with a newer model mortiser from Reynolds) has tapers that are probably the same as yours...they are smaller than a MT1..... I have a feeling that many of the Foot and hand mortisers from the US used a similar taper on their chisels and may have eventually been taken up by Reynolds. That original chisel that I located in Brisbane will fit my machine once it is restored and it is closer to a MT2.
FW Reynolds 1-4_Chisel_001.jpgFW Reynolds 1-4_Chisel_002.jpgFW Reynolds 1-4_Chisel_003.jpgFW Reynolds 1-4_Chisel_004.jpgFW Reynolds 1-4_Chisel_005.jpg
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30th June 2019, 06:33 PM #10
I measured both styles of mortise chisel and even though the original is much larger it looks as though they are both tapered at 3/8” per foot....this corresponds to what was mentioned on an eBay posting for a chisel in Canada that said it was a standard 9/16” to 1/2” over the 2” length of the taper... so thinking that this may have been a standard taper for these old mortisers
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30th June 2019, 07:50 PM #11
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