AMETEK 的 Pittman直流無刷無槽電機作為第三代直流電機具備無齒槽效應，尺寸小，轉速高，噪音輕，抖動小等優點，適合多種需要在高轉速中定位的應用。其中BI系列小外徑只有9毫米，空載轉速達50000轉，不銹鋼外殼，并有可高溫版本。

電機型號               電機外徑       輸入電壓       轉速范圍         額定扭矩
                            (mm)            (DC)            (RPM)           (Ncm)
BI-04-100-0.30     9.5                7              0-11200        0.42
BI-05-075-0.54     12.7            24              0-32950        0.353
BI-05-075-1.08     12.7            24              0-10220        0.424
BI-05-150-0.73     12.7            24              0-28375        0.8
BI-05-150-1.08     12.7            24              0-13780        0.6
BI-08-075-0.56     20               28              0-47500        1.3
BI-08-075-1.1       20               28              0-24265        1.5
BI-08-150-0.72     20               24              0-30950        2.4
BI-08-150-2.00     20               28              0-9720          3.0
BI-11-075-0.97     28               24              0-22380        4.45
BI-11-075-2.20     28               24              0-9600          4.38
BI-11-150-0.97     28               24              0-23250        6.1
BI-11-150-3.50     28               24              0-5620          10.5
BI-14-075-1.02     35               24              0-21780        8.4
BI-14-075-2.50     35               24              0-7970          10.5
BI-14-150-1.66     35               24              0-13390        16.7
BI-14-150-3.43     35               24              0-5810          15.4
BI-18-150-1.50     44.5            24              0-15280        22.6
BI-18-150-3.00     44.5            24              0-7280          29.0
BI-18-225-2.00     44.5            24              0-11700        13.4
BI-18-225-3.90     44.5            24              0-5650          24.7
BI-23-150-2.30     57               28              0-11475        28
BI-23-250-9.75     57               48              0-6690          33
BI-34-150-3.20     86               28              0-8340          67