After prolonged use my metal saw became worn and needed replacement. The new blade has 72 teeth, a diameter of 70 mm, and a hole size of 24.5 mm, different from my old saw.
A new holder was made to match the bigger hole size. Its design follows the design of the saw arbor described in Article Number 17.
|1. Machining the CAP from free-cutting steel, diameter 30 mm.
NOTESee 7.5, below for an exploded view and the names of the individual parts.
|2. Using saw to check fit . A neat fit with no play is ideal.|
|3. Drilling 6.2 mm hole in CAP.
|4. Trimming CAP while copper foil protects machined surface.
|5. Counterboring CAP for head of locking screw.
|6. The BODY (SHAFT side) has been drilled and tapped to match threads of
The material is free-cutting steel, diameter 30 mm.
Exploded view of arbor.
|7. Machining SHAFT from free-cutting steel. Blank size
of 14 mm is turned to 12 mm and threaded to mate with the BODY.
|8. The BODY is threaded onto the SHAFT and locked with high strength adhesive
such as Loctite 2760.
A fixed steady supports the BODY during boring.
See Article Number 37 for more on the Fixed Steady.
|9. After machining BODY, cut off excess and face end of SHAFT.|
|11. Back view of the holder.|
|12. The new one is on the left and the old one on the right.