Whats this used for ?

[JFC]

It came with the spindle moulder

 

[Freetochat]

I haven't seen one before, buy I would guess that it is a 'wobble saw' for grooving looking at the offset saw blade.

 

[JFC]

Thats my first thought but i thought wobble saws where saw blades with spacers . This looks as though the blade wobbles as it spins :shock: I thought it might have a specific use .

 

[Scrums]

Yup I concur - a wobble saw, should be some means of adjustment somewhere to make it wobble a bit less and take a thinner cut.

 

[Sgian Dubh]

As others surmise, it's a wobble saw. Adjust the cammed washers either side as your two images show to create the width of cut you want. Then lock it in place on the spindle with the nut.

They're not used much nowadays, perhaps because one characteristic they have is to create a curved bottom to the groove. I haven't seen one in use for perhaps fifteen years although I do have one in my tool cabinets, along with slotted collars of various types. The slotted collars would give anyone from the HSE the heebie-jeebies if they spotted any of them mounted and working, ha, ha. Slainte.

 

[jasonB]

As the others have said its a wobble saw but the blade looks like it will have difficulty making an impression in balsa let alone anything else. I have one of the Omas ones that Axminster sell and find it very useful for grooving when making shaker doors etc where the slight radius to the bottom is not a problem.

Jason