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Machine Guarding

Two-Hand Controls can be used as safeguarding devices in the single stoke mode of operation on part revolution clutch presses. Similar to the two-hand trip, this device keeps the operators hands away from the point of operation during the entire machine stroke.

Two-Hand Control Regulations
Press Operation Using Two-hand Controls
Press operation using two-hand controls
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Single Stroke Requirements
  • Each hand control must be protected against unintended operation and arranged by design, construction, and/or separation so that the concurrent use of both hands is required to trip the press. [29 CFR 1910.217(b)(7)(v)(a)]

  • The control system must be designed to permit an adjustment which requires concurrent pressure from both hands during the die closing portion of the stroke. [29 CFR 1910.217(b)(7)(v)(b)]

  • The control system must incorporate an anti-repeat feature. [29 CFR 1910.217(b)(7)(v)(c)]
Dual Two-Hand Control Operation
Dual two-hand control operation. Press operation requires separate sets of two-hand controls for two operators.
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  • The control systems must be designed to require the release of all hand controls before an interrupted stroke can be resumed. This requirement pertains only to those single stroke, two-hand controls manufactured and installed on or after August 31, 1971. [29 CFR 1910.217(b)(7)(v)(d)]

Please also see the formula used to compute the minimum safety distance on mechanical power presses to meet the ANSI B11.1 Press Safety Standard or information on stop-time measuring units.

How Does It Work?

Two-hand control, as a point of operation safeguarding device for press brakes, is ideal for short-run job-shop operations. Piece parts can vary from quite small to very large.


By depressing the control buttons, the operator initiates the press brake stroke.


The operator must hold the buttons until the slide completes its downward travel. If the operator removes a hand from one of the controls, the slide will stop. In the single stroke or Hi/Lo mode, the slide will make one complete stroke.

Example of Two-Hand Control Operation
Example of two-hand control operation
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In the sequence mode, the slide will automatically stop at a preset position 1/4" or less above the work piece. This position is adjustable for different feed-line heights or material thickness.


If the work piece is not already placed in the die, it may be inserted at this time.


The two-hand control or the foot switch is now re-initiated, causing the slide to continue through the bottom of the stroke and finishing at top dead center (TDC).

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