Biscuit jointing ?

[waterworks]

I have a Rexon biscuit jointer I've never used lurking at the back of the tool cupboard and now a job has come up for it , the blade is 100mm diameter and the tips measure 3.8mm , what size biscuits do I need for it ?

 

[Rhossydd]

Standard Biscuits vary in width and length, not thickness. There should be an adjustment for the depth of cut on the machine, usually three options, and you buy the biscuits to suit the depth of cut which in turn will depend on what you're jointing.

 

[Hugh M.]

Something like this:

That’s on a fairly generic Erbauer. Set to size 20.

 

[waterworks]

I will be jointing 200 x 50 boards edge to edge to make a workbench top.

 

[Phil Pascoe]

So you need 20s.

 

[Blister]

I sometimes have problems with biscuit's
Dunk them in my coffee and sometimes half of it fall is the cup

 

[robgul]

Biscuits are OK, I use them a lot, BUT they don't "penetrate" very far into the boards being joined - they're more for "location/alignment" than "strength" - for something like a worktop bench I'd consider dowels* with a bit more depth into the boards.

*cheap drilling jigs are available