Dukane 403570-01 user manual Rpm

Section 7 - Optimizing Performance

surface speeds between 360 and 600 in./sec. However, speeds of 120 in./sec. and lower have been used with good results. The mathematical relationship between surface speed and spin speed (RPM) is given by the equation:

60v RPM = π D

where

v is the surface velocity

D is the average weld diameter

A plot of the spin speed and average weld diameter for a number of surface speed values is shown in Figure 7-1.

	4000
													120 in/sec = 10 ft/sec —						3 m/sec
													240 in/sec = 20 ft/sec —						6 m/sec
													360 in/sec = 30 ft/sec —						9 m/sec
	3000												480 in/sec = 40 ft/sec — 12 m/sec
													600 in/sec = 50 ft/sec — 15 m/sec
													720 in/sec = 60 ft/sec — 18 m/sec
(rev/min)													840 in/sec = 70 ft/sec — 21 m/sec
													960 in/sec = 80 ft/sec — 24 m/sec
	2000
Speed
								v	=		v =	600	v =	720	v	=	840	v =	960	in/sec
							v =			480
								360
					v
Spin						=
	1000				v	240
					=
					120
RPM		0
			1	2	3	4				6			8				10			12

D Average Weld Diameter (inch)

Figure 7–1Dependence of Spin Speed on the Weld Diameter for Selected Surface Speeds

Dukane Manual Part No. 403-570-01 Page  61