macg

I want to cut some grooves with a 3/4" ball nose in MDF can anyone recommend the size router I need and what cutter size to get, I am planning to build a cnc from MDF and the plans call for this size, see rockcliffmachine com the grooves are for bearings, the plans say to use a table router or table saw to cut the grooves, I do not own a table router and want to buy one for other projects too.

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Mike

At the top of our home page you will find a link to Oak Park, the home of The Router Workshop. You can purchase one of the best tables available there. You should have a router with a 1/2" collet, for help in choosing a router click on the blogs link and select Sawdust Dreams. You will find a wealth of good common sense information there to help you along. To cut a 3/4" groove you need a bit with a 3/4" diameter. Usually people would use a straight or plunge bit for this process, not a ball cutter. Is there a special reason you want to use the ball cutter bit?

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Mike

bobj3

Hi macq

Looks like you will need two ,3/4" and 1" If I readed the PDF file right.

Core Box Bits
#8718 3/4"
#8719 1"
http://www.mlcswoodworking.com/shops...s/bt_core.html

Bull Nose bits
#7764 3/4"
#7765 1"

http://www.mlcswoodworking.com/shops...s/bt_bull.html

Bj

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Bj

macg

Thanks for the fast reply
I am trying to build this see a picture rockcliffmachine com it's a CNC router made from MDF or wood the bearing grooves call for grooves to be cut in the table slides for a 3/4" diameter bearing it can be a round, a vee or a straight groove I thought the round grooves would fit better. I cannot seem to insert a picture or link to this post

macg

I looked at Oak Park but I cannot find the 3/4" ball nose bit, is it available ?

Mike

You are not allowed to post links until after you have made 10 postings, this is to prevent spammers and such from posting junk. It would be best to cut a straight groove.

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Mike

macg

I was hoping I could use a smaller trim router to cut the grooves, then I could use the same router and mount it in the cnc machine , is it possible to get a 3/4" straight bit with a 1/4" shank and if possible would a smaller router be able to cut these grooves in mdf?

Joe Lyddon

macg,

W e l c o m e . . A b o a r d !!

macg

yes the core box bit looks good #6418 , I have been looking for a ball nose all this time, why is it called a core box bit? the plans call for the 3/4" dia. grooves to be cut 3/8" deep, it might be slow going with a smaller 1/4" collet router, but if I can do it I will be able to mount the router in the CNC machine I am building

bobj3

core box=

The most important part of a thing; the essence.

The portion of a mold which shapes the interior of a cylinder, tube, or other hollow casting, or which makes a hole in or through a casting; a part of the mold, made separate from and inserted in it, for shaping some part of the casting, the form of which is not determined by that of the pattern.

The center or inner part, as of an open space; as, the core of a square.

A projecting piece on a pattern which forms, in the mold, an impression for holding in place or steadying a core.

Bj

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