Code:
Additional information:
                        Shaking speed (rpm)     Taps per minute 
Current Duratap machine 
model DT258 (50 Hz)           250                     160 
      
Haver-Boecker machine 
model RX29 (50 Hz)            278 +/- 10            150 +/- 5 
   
SAE J444 requirement          275-295              145-160