Classic AirGraver® Handpiece

The Classic AirGraver® is available with two pistons: Standard stainless piston and an optional Tungsten Dead Blow™ piston.  The chart bellow illustrates the speed ranges of the tool for when it is set at a short stroke, and for when it is set at the longest stroke.

	Stainless Piston			Tungsten Dead Blow™ Piston
	Short Stroke	Medium Stroke	Long Stroke	Short Stroke	Medium Stroke	Long Stroke
Idle	2,400	2,400	2,400	1,500	1,500	1,500
2 psi	5,400	3,000	3,000	3,900	2,100	1,500
5 psi	6,600	3,600	2,400	4,500	2,400	1,800
10 psi	7,800	4,500	3,000	6,000	3,300	2,100
20 psi	9,600	6,300	4,200	7,800	4,500	3,000
30 psi	11,100	7,800	5,100	8,400	5,400	3,600
40 psi	12,300	8,700	6,300	9,300	5,700	3,900
50 psi	13,200	9,900	6,400	10,200	6,600	4,200
60 psi	13,800	11,400	6,600	10,500	6,700	4,500
70 psi	14,600	11,900	6,700	10,900	7,000	4,800

The AirGraver's length of stroke adjustment provides a virtual multitude of handpieces in one tool. At any given stroke length setting (determined by the adjustment ring on the barrel of the tool), the power is varied with air pressure from the foot control or PalmControl (.05psi to 80psi). The absence of an internal spring means uniform performance throughout the range, with no “sweet spots” or “dead spots”. The full range of power and speed is "sweet" throughout, due to the internal automatic balancing of air pressure on both the impact and return strokes.

 

The AirGraver's delicate impacts gives the user ideal control. The AirGraver® system requires air consumption of 0.1 to 0.3 CFM at full throttle, allowing the use of smaller air compressors.

Left: Close-up of an engraved pocket watch case
engraved using the 5/16" bore AirGraver® handpiece
 

The inset in the butt of the custom burl wood and ivory handles is a banknote style engraving, designed for the tool and reproduced with a restored 1915 150 ton coining press. The design was engraved in tool steel, hardened, and used to reproduced itself in the press.

Pictures of this die being engraved