Secretary of Types of conveyors pdf has designated certain non-farm jobs as particularly hazardous for employees younger than 18. A wide variety of mechanical motion is potentially hazardous.
NOTE: The 1990 ANSI B11. Is secure, tamper-resistant, and durable. Avoids interfering with normal operation of the machine. Allows for safe lubrication and maintenance.
Four types of machine guards, fixed machine guards, adjustable machine guards, self-adjusting machine guards, and interlocking barrier machine guards have advantages and limitations based on the specific situations of the workplace. Should allow for inching of machine. Eight types of safeguardng devices: pullback devices, restraint devices, presence-sensing devices, presence-sensing mats, two-hand controls, two-hand trips, and type A and type B moveable barriers, also have advantages and limitations based on the specific situations of the workplace. May require adjustment with tooling changes. Do not ride the foot pedal. 29 CFR 1910, Subpart O. Annual Survey data, Table R25.
Certain machines can be categorized based on the type of clutch they use- full-revolution or part-revolution. Differing modes of operation for these two clutches determine the type of guarding that can be used. So, presence-sensing devices will not work and operators must be protected during the entire press operating cycle. For example, properly applied barrier guards or two-handled trip devices that are installed at a safe distance from the hazard area may be used. Machines incorporating full-revolution clutches, such as mechanical power presses, must also incorporate a single-stroke device and anti-repeat feature. The majority of part-revolution presses are air clutch and brake.
They are designed to trap air in a chamber or tube. When the compressed air is put into these chambers, the clutch is engaged, the brake disengaged and the press makes a single stroke. To stop the press, the reverse takes place. Thus, the part-revolution clutch can be disengaged at any time during the cycle to stop the cycle before it completes the downstroke. Devices such as pullbacks or restraints improperly adjusted. Source: OSHA IMIS Accident Investigation Database.
Table O-10 of 29 CFR 1910. Hands-in-Die operations require additional safeguarding measures: See 1910. Adherence to this safety practice will reduce the risk of point of operation amputations. LOTO procedures for the die setting operation. See the 29 CFR 1910.
Training is essential for employee protection. An operator was bending small parts using an 80-ton unguided press brake. The operator on the previous shift had reported to the supervisor that the operator had placed his fingers close to the point of operation, but was told that nothing could be done and that the operator should be careful. An operator was bending metal parts using a 36-ton part-revolution power press brake that was foot-activated and equipped with a light curtain. While adjusting a part at the point of operation, the employee accidentally activated the foot pedal and amputated three fingertips. Point of Operation Guarding of Power Press Brakes. General requirements for all machines.