Page 290 - Modular design for machine tools

Engineering Design Fundamentals and Single Flat Joint Characteristics 249

Figure 6A-1 Scatter of measured damping capacity in practical cases (courtesy of Groth).

TABLE 6-12 Values of and (Courtesy of Groth)
Valid range of
Type of contact surface b g interface pressure
p kgf/cm 2
A = 122 0.017 1.16
A = 122, lubricated
Scraped/
scraped n= 21 0.044
n= 33 0.036 0.33
n= 117 0.021
0.3–100
A = 122 0.00415
= 208 0.0080 0.66
= 260 0.012
Scraped/
planed
Lubricated (n= 117)
0.018
Machined lay orientation: Long 0.91
Short 0.010
Scraped/ A = 244 0.0165 0.82 0.3–40
ground
2
A: Area of joint surface cm ; n: Oil viscosity at 50°C, cSt.