Sugino Machine Co., Ltd. RB-3860 Hydro-Speed Regulator

The RB-3860 Hydro-Speed Regulator is Sugino’s spring-return hydraulic feed speed control unit for drilling and tapping attachments, designed to precisely set the feed rate of an air cylinder across a wide range. Its compact, completely sealed construction eliminates the need for hydraulic fluid replenishment, delivering stable control over long periods and resisting load fluctuations during operation. With a stroke of 2.36 inches (60 mm) and a documented thrust capacity in the 480–990 lb range, the RB-3860 provides predictable, repeatable performance across typical drilling cycles. The unit is mounted to operate in any orientation and features a straightforward speed-adjustment knob for easy on-the-fly tuning. In Sugino’s lineup, the RB designation denotes the spring-return variant of the Hydro-Speed Regulator, and the RB-3860 is documented as a standard hydro-speed regulator on Sugino Selfeeder Electric ES6 materials, with a skip-motion type hydro-speed regulator also available for pipe-material drilling applications.