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Subchapter 7. General Industry Safety Orders
Group 8. Points of Operation and Other Hazardous Parts of Machinery
Article 55. Power Operated Presses
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§4215. Hydraulic Power Presses (Punch Presses).

(a) Hydraulic power presses shall be guarded in a manner that will accomplish the following:

(1) Restrain the operator(s) from inadvertently reaching into the point of operation, or

(2) Inhibit machine operation if the operator's hand or hands are inadvertently within the presence sensing field or inadvertently within or placed within the point of operation, or

(3) Automatically withdraw the operator's hands if they are inadvertently within the point of operation.

(b) Devices that will accomplish (a)(1), (2) or (3) above include, but are not restricted to those listed below:

(1) Presence-sensing devices

(2) Holdout or restraint devices

(3) Pullout devices

(4) Two-hand control devices [see 4193(e)]

(5) Gate or movable barrier devices

(6) Fixed barrier guard (see 4207).

(7) Any other system of guards, automatic or semi-automatic feeds, etc., that will allow the material to be worked and effectively prevent the operator's hand(s) from entering or being in the point of operation during the die-closing portion of the press stroke.

(c) Inch. Inching controls shall comply with Section 4193(d).

(d) Point of operation guards and devices shall comply with Sections 4207 and 4208 respectively.

(e) Hydraulic Equipment. The maximum design working pressures in any hydraulic system on a hydraulic powered press shall not exceed the safe working pressure rating of any component used in that system.

(f) Press Control Systems.

(1) Stop Control. At least one of the following shall be provided as a means of stopping press motion:

(A) Stop. A means of stopping all press motion. Actuation of the stop control shall immediately deactivate all press controls. The stop control shall override any other control.

(B) If a stop button is provided, it shall stop the press slide(s) and/or return the slide(s) to the initial starting position.

(2) Mode Selector. When more than one mode is furnished, a means of selecting the different modes such as Off, Inch, Single Cycle, and Automatic shall be supplied with the press control. Selection shall be by means capable of being supervised by the employer. It is not intended that all these press modes be required or be limited to the above.

(A) Off. The off mode shall make the press control inoperative.

(B) Inch. Press controls which provide this mode shall require the following conditions:

(i) The slide will have motion only during the time of operation of the actuating control(s) used for this mode.

(ii) The inching control cannot set up an unintended movement by contacting or overriding the stroke limiting mechanisms.

(C) Single Cycle. Press controls which have this mode shall require that:

(i) Actuation of the operating controls shall initiate the cycle.

(ii) Re-actuation of operating controls is required to initiate a new cycle.

(iii) The control system shall be designed to require an intended action of the operator before an interrupted cycle can be resumed.

(D) Automatic. Press controls which contain the automatic mode shall be designed so that the initiation of automatic run shall require an action by the operator in addition to the selection of automatic on the mode selector by the supervisor, before actuation of the operating means will result in automatic cycling. An interrupted automatic cycle must be initiated as specified in this paragraph.

(3) Actuating Control Selection. If more than one actuating means is provided, the selection method shall be designed so that the selection is controlled by the employer.

(4) Press Control Reliability. When required by Section 4193(m) the press control shall be designed to prevent initiation of a successive stroke signal in the event that a failure occurs within the press control.

NOTE: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code.


1. New section filed 11-17-82; effective thirtieth day thereafter (Register 82, No. 47).

2. Amendment of subsection (f)(4) filed 10-31-85; effective thirtieth day thereafter (Register 85, No. 44).

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