Air Requirements

A simple chart gives various information for Air Impact Models. The information includes the bore size, stroke length, and relative time to extend, CV, SCFM, and expected drop in pressure of the compressed air.

The Air Impact Marker is not generated solely dependent on the air flow. The force is a combination of the air pressure and speed at which the rod/hammer is moving.

Air Requirements for Impact Markers*

Model	Bore	Stroke Length	Time to Extend	CV	SCFM	drop in pressure
78	1.125	15/16	25ms	0.62	8.3	2
88/288	1.125	2.5	50ms	0.83	11.1	2
288	1.125	4	70ms	0.95	12.7	2
288	1.125	6	80ms	1.25	16.7	2
98/298	1.625	2.5	60ms	1.45	19.3	2
298	1.625	4	90ms	1.55	20.6	2
298	1.625	6	130ms	1.61	21.4	2
751/851	1.5 (hammer)	2.5	70ms	1.38	18.4	2
751/851	3 (cylinder)	4	250ms	1.19	15.8	2

*CMT uses a standard valve with 1.7 cv