These Smooth Spigot Jaws are designed for the Stronghold Chuck. They are machined long and deep for better grip on smaller parts. The outside surface of the jaws is serrated to grip the work piece.
If often turning small parts, #1 jaws are a must, but do not use them for material over 1-1/2" in diameter or for bowls with recess larger than 1-3/4" in diameter.
Why Oneway Jaws are Superior
Most jaws on the market are designed to only fit one diameter by a limited depth (design diameter). For example, a set of jaws turned to 2" diameter with a 7° taper * 1/4 deep will only work well in a cavity that is exactly 2" diameter * 7° and just less than 1/4" deep. They will hold progressively less, and increasingly damage your mounting as this base size changes from the theoretical perfect size.
Oneway jaws are designed to achieve excellent 8-point contact at all diameters in the jaw size range. Their patented profile top jaw shape increases gripping power at all diameters of round and square stock. Less wood damage also occurs with this jaw shape than with the conventional round-shaped jaws.
Important: These jaws are not to be used with the woodworm screw.
- Carbon steel base jaws provide precision grinding on the sides for the exact and controlled clearances, which are required for woodturning chucks
- Base jaws are case hardened which makes them longer lasting, stronger, and non-seizing in use
1/2 lbExternal Compression Min:
3/8”External Compression Max:
2”Internal Expansion Min:
1”Internal Expansion Max: