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Boring bit length for dowel boring machine

3/1/20       
Bruce Member

Hi! I am going to buy a system 21 dowel boring machine but I am confused what boring bit length I should use. My local store has has 57mm and 70mm length. We will usually use this machine for cabinet carcass. When should I use 57mm and when to use 70mm? Need your help guys. Thanks

3/1/20       #2: Boring bit length for dowel boring ...
Dennis Bean  Member

Website: http://www.saliceamerica.com

Maggi shows 57.5mm, 70mm, 77mm or 85mm as the bit length options for the System 21. It probably depends on the length of dowel you intend to use. 57 seems to be the magic number since Maggi sells the 57 on their web page. 57mm is also the same bit length for your hinge boring machine. Pay attention that you order both right hand and left hand bits. Here is the link to the Maggi web site.

Ciao

Maggi Web Site

3/1/20       #3: Boring bit length for dowel boring ...
Bill

I canít answer for your specific machine but generally speaking the shorter the bit the more accurate the hole.

3/1/20       #4: Boring bit length for dowel boring ...
Quicktrim

I just set up my CNC and Maggi system boring machine with bits.

The 57 are what I used everywhere and go plenty deep for 3/4 material.

If you are boring 1 1/2 material often go for a longer bit but a 57 should give you plenty of depth for most uses and a tighter tolerance.

3/1/20       #5: Boring bit length for dowel boring ...
cabinetmaker

We always used 57mm with our 23 spindle before selling it off It allowed for the quick change chucks to clear easier

3/1/20       #6: Boring bit length for dowel boring ...
Bruce Member

Thank you very much for the response brothers! That is just what i needed to hear. 18mm material is what i use all the time. My boring machine is just a knock off from china. It also has quick change chucks. I assume that i will only use the 70mm bit to drill deeper holes for the minifix bolt to reach the minifix cam?

3/2/20       #7: Boring bit length for dowel boring ...
Dennis Bean  Member

Website: http://www.saliceamerica.com

Maggi shows 57.5mm, 70mm, 77mm or 85mm as the bit length options for the System 21. It probably depends on the length of dowel you intend to use. 57 seems to be the magic number since Maggi sells the 57 on their web page. 57mm is also the same bit length for your hinge boring machine. Pay attention that you order both right hand and left hand bits. Here is the link to the Maggi web site.

Ciao

Maggi Link

3/2/20       #8: Boring bit length for dowel boring ...
Chuck Hicks Member

Website: http://www.southeasttool.com

Most of the Hinge bits are availble in 57 and 70 OAL

Hinge Bits

3/2/20       #9: Boring bit length for dowel boring ...
Dennis Bean

True Chuck. The standard size for both the 35mm (RH) and the two 8mm(LH) is 57mm length for any brand hinge boring machine.

6/17/20       #10: Boring bit length for dowel boring ...
D Conti

57 mm is usually for dowels, we use 70 mm for 5mm holes for confirmat screws which usually longer than the dowels, and also need a bit more depth to allow the confirmat screw to pull up tight. It really all depends on the depth of the hole you are trying to drill, I generally try to use the shortest bit I can because the shorter the bit the more accurate the hole location

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