Proper bit to use for cribbage board holes

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flankbell
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Proper bit to use for cribbage board holes

Post by flankbell »

We have not made any cribbage boards in the shop and really do not want to! A friend and shipmate wants a submarine shaped board which is no problem made out of walnut and I don't want to screw it up to many times!

So what bit should I use to cut the holes? I am afraid a regular 1/8" drill bit won't stand the spindle speed. Also not sure an 1/8" end mill will work?

Thanks for any help!
Tim

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gkas
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Re: Proper bit to use for cribbage board holes

Post by gkas »

I would use peck drilling with a 1/8" straight flute mill. This Needlepoint Blocking Board is laser etched, then 1/8" holes drilled 0.5" deep at all line intersections and the center of each square. Lots o' holes. I used a cheap 1/8" straight flute mill with peck drilling. Board is plywood. The mill still looked like new. I think it was a cheapie from Drillman on eBay. Something like $10-12 for a half dozen.
Needlepoint Blocking Board
Needlepoint Blocking Board

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scottp55
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Re: Proper bit to use for cribbage board holes

Post by scottp55 »

I've only made 19 boards for sale, but we went with a 7/64" 2F endmill with a
Profile cut/Inside the line/and a Spiral Ramp/eventually wound up using many passes...
as it went so fast you could barely see it spiral, but left an excellent finish...
(Feel bit after a couple holes, if warm...increase Plunge speed or reduce RPM...
X,Y speed won't change much...Plunge does.)
And we could use the Offset for a perfect fit for whichever pegs we used at that depth.

It cuts way faster than you would think!
Plunge times.jpg
Walnut was requested for the store 18.
BRIAN'S BOARD ACTUAL.jpg
This one for a friend of Dad's was my favorite:)
BBOARD FRONT 1.jpg
BBOARD BACK 1 CHAIR.jpg
You'll get a lot of different opinions on that question:)
Just mentioning how we went after prototyping several.
I've learned my lesson well. You can't please everyone,so you have to please yourself
R.N.

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adze_cnc
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Re: Proper bit to use for cribbage board holes

Post by adze_cnc »

scottp55 wrote:
Tue Sep 01, 2020 11:10 pm
I've only made 19 boards for sale..
Fascinating...The one point value for a cribbage hand (between 1 and 29) that you can't get. It's disheartening when you have to say: "Yup... got another 19 hand...*sigh*" after you opponent just pegged a 24 hand.

Steven

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scottp55
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Re: Proper bit to use for cribbage board holes

Post by scottp55 »

Greek to me Steven as I've never played the game and had to send protos to cribbage nuts for input :)

DID find out was considered a "Perfect fit" for Pete's Pegs and our wooden peg supplier...
Also found out 82 degrees was considered optimal for the countersink...
AND correct countersink depth for people with failing vision..
and they preferred Maple as the oil darkened the end grain perfectly :)

Too bad the market is fairly flooded :(
Even in a high end tourist town like mine...the season is so short, the minimum mark up is Keystone.
To make a $95 selling point, it had to be special and area specific.
Only way to improve margin was to cut machine time on board and "Standard" card storage lids.
TJ .8INCH IDENTICAL BACKER BOARDS CHANGE BLANK NOT BITS1.jpg
Lids were interchangeable (magnet held), so some did spend $60 to upgrade to a 3D lid.
Not worth our while at the time....just as glad to let it go:)
(producing almost production style is NOT my thing:)
GLAD when we lost an Ivy League school bookstore contract...1 middleman too many for profit;

We tried .125" end mills/drill mills/and ball nose with many Drill variations.
Profile inside with spiral ramp gave best quality and times.
scott
I've learned my lesson well. You can't please everyone,so you have to please yourself
R.N.

Charlie_l
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Re: Proper bit to use for cribbage board holes

Post by Charlie_l »

Cutting a half dozen boards right now for a family member project.
The 1/8 inch works well for the holes. I have done inside profile of 0.126 diameter circle cuts with spiral, turning the spindle at about 10,000 which worked very well and fast. This time I'm peck drilling 0.45 total depth. the first 0.1 is cut without a peck using a down cut bit. Then, change to upcut and finish the depth with a single peck half way down. Spindle has been set at about 14,000 this time. Maple is the wood and the holes are really nice. Probably not the fastest but so far I have liked it.
Charlie
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Garrett Fromme
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Re: Proper bit to use for cribbage board holes

Post by Garrett Fromme »

Standard drill bits do not work due to the high speed of CNC routers. Peck drilling is extremely slow. Do a search for cribbage board drill bit. You will find an excellent drill bit at the top of the search.

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