Slitting saw arbor
Most slitting saw arbors have the register for the saw turned on the shaft and then a cap is used to hold the saw in place. The cap can be quite thin but the head of the clamping screw for the cap protrudes quite far. The disadvantage of this arrangement is that if, for instance, the object being cut is held in a vice then often the clamping screw will foul the vice. This can be overcome by raising the object in the vice to get clearance but with small objects this is not always possible, and in general, the least amount of protrusion from the vice is desirable.
The slitting saw arbor described here inverts the usual arrangement and the register for the saw blade is formed in the cap and this allows the clamping screw to be recessed. I have made two arbors, one with a 16 mm register for 63 mm diameter saws and one with a 22 mm register for 80 mm saws. The description and photos that follow describe the arbor for a 16 mm arbor.
The slitting saw arbor described here inverts the usual arrangement and the register for the saw blade is formed in the cap and this allows the clamping screw to be recessed. I have made two arbors, one with a 16 mm register for 63 mm diameter saws and one with a 22 mm register for 80 mm saws. The description and photos that follow describe the arbor for a 16 mm arbor.
This shows the end cap. This was drilled with a M6 clearance hole and the central boss was turned to an tight sliding fit in the slitting saw bore.
This shows the other side of the cap. It was drilled out 10 mm to accept the head of an M6 socket head screw. A 10 mm end mill was used to provide a flat bottom to the hole.
This photo shows the arbor shaft. It was machined from a length of 25 mm round bar. An MT2 taper was formed at one end and drilled and tapped M10 for the draw bar. The piece was then mounted in the lathe spindle taper using an MT3-MT2 adaptor and the end face drilled out to 5 mm. The recess was bored to be a good sliding fit for the boss on the end cap. Finally the 5 mm hole was tapped M6 for the M6 clamping screw.
The arbor for slitting saws with a 22mm bore are made in the same way but from a length of 1.1/4" (32 mm) round steel.
These arbors have proved very satisfactory in use.
These arbors have proved very satisfactory in use.