Measures must be taken to prevent the wear and fracture of the drill in such machining processes. Step-feed maching is the most effective way of preventing such problems.

The MCB- 1 Step Control regulates the feed and recoil motions for drilling holes at depths greater than 5 to 6 times the drill bit diameter. The drilling depth for each step is calculated ac cording to the nature of the workplace material. The actual control is done by setting the timer and a related adjustment to the Hydro-Speed Regulator of the Newtric Selfeeder. The Step Control will reduce drill bit wear, minimize drill breakage and produce a precision finish. The Step Control provides a signal to a five-port, 2-position solenoid valve for the feed and recoil motions of the Newtric Selfeeder. [The solenoid valve must be provided by customer.) The Selfeeder and the solenoid valve exchange the compressed air for the feed and recoil directly. The A-type specification which is equipped with an air connecting block instead of standard valve block, shown on the separate table, is required for SN2, SN3, SN4 and SN5-types Newtric Selfeeder. An air return-type Hydro-Speed Regulator is required for step drilling operations. An Operate Signal Kit is also necessary to control maximum depth and “home” positions.


  • The MCB-1 Step Control permits immediate interfacing with other machines by using signals such as “home” position, feed, storing, and running. This introduces automation to your Selfeeder operations.
  • Three adjustable times are available to optimize cutting operations.
  • Inching feeds can be finely tuned by adjusting the timers.
  • Small and lightweight, the Step Control can be conveniently mounted in any practical area in the control cabinet.

Detail Chart:

Power 24 V DC, ripple: not more than 5%, 4.8 W Timer Set Range T1: 1st Stop 0.5 – 11 sec. ±20% T2: Recoil 0.1 – 5 sec. ±20% T3: 2nd Step or Alter 0.5 – 11 sec. ±20% Input Signal Start No Voltage Contact Signal Return 24V DC Zero Detect LS Inside Power Supply Feed End Detect LS Output Signal Operation Contact Capacity Hydro-Speed Regulator Recoil 220 VAC Feed End Storing 30V DC Origin 1 A (Resistance Load) Selfeeder Feed Ambient Condition Temperature 32°F – 104°F (0°C – 40°C) Humidity Not more


  • We recommend mounting the MCB-1 in a control cabinet for protection against motor damage.
  • One controller per selfeeder is required.
Model #Item NameVoltage Rating Power Applicable Unit Operating Temperature T1: 1st step T2 : return T3: 2nd and following steps
MCB- 1Multi-Stepfeeder Control24 4.8 ES2 ES3C ES3P ES4P ES5 ES6 ES7 0 to 40 ºC 0.5 to 11 sec 0.1 to 5 sec 0.5 to 11 sec