Router bit for 60mm plunge cut... ¼ inch collet

jmBuildExt · 03-06-2018 07:43AM #1

Hi
Does such thing exist? I've seen half inch ones are common enough. I've seen 1/4 inch on eBay but I need it asap and also wondering if the force on the end of a cheap one might make it snap off... Law of the lever and all that.
My router is a cheapo b &q jobby that has served me well til now (use it for various DIY projects). It only has quarter inch collet. I want to cut the hole for mortise lock. It requires 60mm depth. lock is the mechanism only, so about 30 or 40 mm in height.
I've used a regular straight cut bit to get me half way down, but don't fancy the prospect of chiseling out the rest. I've 5 to do.

dathi · 03-06-2018 10:04AM

use an auger bit to drill out most of the waste from the mortice and then use the chisel to finish the mortice square

Bonzo Delaney · 03-06-2018 11:01AM

Same as above a decent auger bit
Even a sharp spade bit would do then a sharp chisel to clean the edges .
Put a ring of tape at the required depth on the neck of the bit or a ring with a marker to indicate the required depth to leave a nice clean hole .
The router is handy but a 60mm 1/4 inch bit just sounds like trouble for mortice locks esp at full depth

jmBuildExt · 03-06-2018 11:32PM

Ok cheers for the info lads. Makes sense. Actually didn't know what an auger bit was (til I googled it) although I'd come across them in the past not knowing what it was called.
Did one of them today with a spayed bit that I had knocking about and chisel. Took me about 2 hours

... Might be time to get a router upgrade

dathi · 05-06-2018 10:20AM

https://www.youtube.com/watch?v=s05jmR_aWYQ
one of these then

jmBuildExt · 05-06-2018 10:26AM

Picked up an Auger bit - gave it a quick test drive last night - it ate through it!!! Thanks for the tip.
Still a pain chiselling out after it - but sure what can you do, i wouldnt justify the use of the new router, never mind the jig.

I'll persevere with it I've only 3 left - ill get to them next weekend.

Thanks again!

Bonzo Delaney · 05-06-2018 10:56AM

jmBuildExt wrote: »

Picked up an Auger bit - gave it a quick test drive last night - it ate through it!!! Thanks for the tip.
Still a pain chiselling out after it - but sure what can you do, i wouldnt justify the use of the new router, never mind the jig.

I'll persevere with it I've only 3 left - ill get to them next weekend.

Thanks again!

Make sure the chissels are sharp makes a big difference
Let the auger bit do most of the work make sure each drill hole overlaps so there's very little wood left in the mortice just a bit of cleaning up on the sides.

jmBuildExt · 07-06-2018 04:50PM

Bonzo Delaney wrote: »

Make sure the chissels are sharp makes a big difference
Let the auger bit do most of the work make sure each drill hole overlaps so there's very little wood left in the mortice just a bit of cleaning up on the sides.

Got there in the end. All done.
Chisel was brand new and plenty sharp. It was more an issue with the operator. Was a pain putting the lock unit in taking out chiseling a bit more etc etc... Got better at it as i went.
But i learned abit more and added a new tool to my box - thanks for your time.

Router bit for 60mm plunge cut... ¼ inch collet

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