●RK型可逆型定速電機/瞬時正反轉馬達（可附調速功能）： 適合于頻繁啟動.停止或反復多次的正逆運轉之用。 
具有瞬時轉換正轉、逆轉功能。因採用平衡繞線方式，并內裝簡易制動機構能夠瞬時地轉換正轉、反轉，其正反旋轉特性同樣均勻且穩定。運轉額定式30分鐘額定。感應馬達和可逆式馬達的不同點：可逆式是能瞬時轉換正、反轉，但感應馬達將接線轉換到反轉，會發生旋轉磁場和逆方向的轉矩，故不能旋轉負載時轉換逆方向。可逆馬達是為了能夠達到瞬間正反轉的功能而設計的，因此跟感應馬達相較之下，運轉時通過的電流較多，溫度也較容易上升，建議客戶使用可逆馬達連續運轉的時間是３０分鐘。 
ASTK臺灣原裝馬達具有低噪音、體積小、高扭力、重量輕、壽命長、免保養等特點----全系列產品與日本東方小馬達的齒軸斜角度完全符合，馬達及減速箱可個別取代. 
種類：聯體型，圓軸型，齒軸型。
功率：6w.15w.25w.40w.60w.90w.120w 
電壓：單相110-240V，三相220-440V 50HZ/60HZ 
可搭配的減速機比數有：3-1800比 
產地：臺灣（原裝正品），有現貨。 
瞬時正反轉電機各功率型號表示： 
2RK6A-A,2RK6A-C,2RK6GN-A,2RK6GN-C,3RK15A-A,3RK15A-C,3RK15GN-A,3RK15GN-C,4RK25A-A,4RK25A-C,4RK25GN-A,4RK25GN-C,4RK25GN-U,5RK40A-A,5RK40A-C,5RK40GN-A,5RK40GN-C,5RK40A-S,5RK40A-S3,5RK40GN-S,5RK40GN-S3,5RK40A-U,5RK40GN-U,5RK60GN-CF,5RK60GU-CF,5RK60A-SF,5RK60A-S3F,5RK60GN-SF,5RK60GU-SF,5RK60GN-S3F,5RK60GU-S3F,5RK60GN-UF,5RK60GU-UF,5RK60A-UF,5RK60A-AF,5RK60A-CF,5RK60GN-AF,5RK60GU-AF,5RK60A-CFF,5RK60A-UFF,5RK60GN-CFF,5RK60GU-CFF,5RK60GN-UFF,5RK60GU-UFF,5RK90GN-CF,5RK90GU-CF,5RK90A-SF,5RK90A-S3F,5RK90GN-SF,5RK90GU-SF,5RK90GN-S3F,5RK90GU-S3F,5RK90GN-UF,5RK90GU-UF,5RK90A-UF,5RK90A-AF,5RK90A-CF,5RK90GN-AF,5RK90GU-AF,5RK90A-CFF,5RK90A-UFF,5RK90GN-CFF,5RK90GU-CFF,5RK90GN-UFF,5RK90GU-UFF,5RK120GN-CF,5RK120GU-CF,5RK120A-SF,5RK120A-S3F,5RK120GN-SF,5RK120GU-SF,5RK120GN-S3F,5RK120GU-S3F,5RK120GN-UF,5RK120GU-UF,5RK120A-UF,5RK120A-AF,5RK120A-CF,5RK120GN-AF,5RK120GU-AF,5RK120A-CFF,5RK120A-UFF,5RK120GN-CFF,5RK120GU-CFF,5RK120GN-UFF,5RK120GU-UFF