Short review of countersinks.

[Packard]

I'm not a big fan of countersinking unless the raised screw head creates a problem, though some of the screws I use have a self-countersinking feature. 

The problems with countersinking are few, but two are important.

1.  It is an extra step.
2.  It can promote the splitting of the wood. (The main issue.  The screw and countersink act as a wedge to split the wood.  This is not generally a problem with plywood, MDF or particleboard.)

For a finished appearance, I like to use finish cup washers.  I use these to mount cabinets to the wall. It gives a clean, finished appearance.

For a finished appearance and to sink the screw, this type of cup washer resolves the splitting issue.  It requires a square shouldered countersink made with a Forstner bit.  But there is no wedge action and it will not cause the wood to split.

 

I see now that Snappy makes square shoulder countersink bits.  So this thread is proving useful to me.  I will buy a set.
https://www.woodcraft.com/products/...MI7t-SvoTN9QIVwZyzCh1f8gc7EAsYBSABEgJCPPD_BwE

 

[semenza]

Oh, good find ! Flat bottom counterbore. Adding those to the drill arsenal.  [thumbs up]

Eliminates using a forstner for that job. No center alignment issues.

            Nothing wrong with reviving an old thread.

Seth

 

[Michael Kellough]

[member=74278]Packard[/member] where do those flat bottom countersink washers come from?

 

[rvieceli]

Lee Valley has some in brass and stainless
https://www.leevalley.com/en-us/shop/hardware/fasteners/washers/47230-lee-valley-countersunk-washers

McMaster has some as well. Search for “dress washer”

Ron

 

[semenza]

Just checked the Snappy site. There are a whole bunch (17) more sizes than Woodcraft offers. Different countebore sizes with same drill size too.

Seth

 

[Coen]

For a finished appearance, I like to use finish cup washers.  I use these to mount cabinets to the wall. It gives a clean, finished appearance.

On the metal L brackets? Why not just use cilinder head screws?

 

[Bob D.]

Fuller makes flat bottom counterbore bits too. I bought a set a few years ago.

 

[Packard]

I really did not know anything about Snappy Products until this thread.  They also sell on Amazon.com, but not with a very good selection. 

Amana tool has counterbores also.  But they are carbide-tipped and pricy.  It's probably worth it if you are doing lots of counterbores.  I do not. 
https://www.amazon.com/Amana-Tool-C...r_1_2_sspa?crid=189UQVUJCGB2F&keywords=snappy+counterbore&qid=1643144118&sprefix=snappy+counterbores%2Caps%2C62&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExT0pJVDdMUFRPWFM0JmVuY3J5cHRlZElkPUEwMzYwMDU2M05VQjFFSkpZT1NLViZlbmNyeXB0ZWRBZElkPUEwNzYzNzU0MlZQNVYyNEhLV09WWSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

 

[semenza]

I really did not know anything about Snappy Products until this thread. They also sell on Amazon.com, but not with a very good selection. 

Amana tool has counterbores also.  But they are carbide-tipped and pricy.  It's probably worth it if you are doing lots of counterbores.  I do not. 
https://www.amazon.com/Amana-Tool-C...r_1_2_sspa?crid=189UQVUJCGB2F&keywords=snappy+counterbore&qid=1643144118&sprefix=snappy+counterbores%2Caps%2C62&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExT0pJVDdMUFRPWFM0JmVuY3J5cHRlZElkPUEwMzYwMDU2M05VQjFFSkpZT1NLViZlbmNyeXB0ZWRBZElkPUEwNzYzNzU0MlZQNVYyNEhLV09WWSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

    Yes, lots of quick change bits, drills, plug cutters etc.  And some Centrotec compatible items.

Seth

 

[Crazyraceguy]

I really did not know anything about Snappy Products until this thread.  They also sell on Amazon.com, but not with a very good selection. 

Amana tool has counterbores also.  But they are carbide-tipped and pricy.  It's probably worth it if you are doing lots of counterbores.  I do not. 
https://www.amazon.com/Amana-Tool-C...r_1_2_sspa?crid=189UQVUJCGB2F&keywords=snappy+counterbore&qid=1643144118&sprefix=snappy+counterbores%2Caps%2C62&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExT0pJVDdMUFRPWFM0JmVuY3J5cHRlZElkPUEwMzYwMDU2M05VQjFFSkpZT1NLViZlbmNyeXB0ZWRBZElkPUEwNzYzNzU0MlZQNVYyNEhLV09WWSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

The Amana ones are carbide tipped and they work/cut well, but they suffer the same issue as many others, the stop collar jambs up with dust. Not Centrotec either.
I have the one with a 3/16" drill bit, I think it's 3/8 counterbore? not sure from memory. I don't use it frequently, but for the application that I bought it for, it's great, except the clogging.