Machine Guarding MSOE #1
- 2. 1910.212(a)(1) Types of guarding • One or more methods of machine guarding shall be provided to protect the operator and other employees in the machine area from hazards such as those created by: – Point of operation, – Ingoing nip points, – Rotating parts, – Flying chips and sparks
- 3. 1910.212(a)(3) Point of Operation • (i)Point of operation is the area on a machine where work is actually performed upon the material being processed • (ii)The point of operation of machines whose operation exposes an employee to injury, shall be guarded
- 4. 1910.212(a)(3) Point of Operation • (ii)The guarding device shall be in conformity with any appropriate standards therefor, or, in the absence of applicable specific standards, shall be so designed and constructed as to prevent the operator from having any part of his body in the danger zone during the operating cycle
- 6. 1910.213(b)(3) Non-restart devices • On applications where injury to the operator might result if motors were to restart after power failures, provision shall be made to prevent machines from automatically restarting upon restoration of power
- 7. 1910.213(c)(2) Spreaders • Each hand-fed circular ripsaw shall be furnished with a spreader to prevent material from squeezing the saw or being thrown back on the operator Spreader
- 8. 1910.213(c)(3) Non-kickback fingers • Each hand-fed circular ripsaw shall be provided with non-kickback fingers or dogs so located as to oppose the thrust or tendency of the saw to pick up the material or to throw it back toward the operator
- 9. 1910.213(g)(1) Swing cutoff saws • Each swing cutoff saw shall be provided with a hood that will completely enclose the upper half of the saw, the arbor end, and the point of operation at all positions of the saw • khf
- 10. 1910.213(g)(2) Swing cutoff saws • Each swing cutoff saw shall be provided with an effective device to return the saw automatically to the back of the table when released at any point of its travel
- 12. 1910.215(a)(4) Work Rests • On off hand grinding, work rests are required, to support the work • Rigid construction, and adjustable with wheel wear • Must be kept closely adjusted, max gap = 1/8" to prevent work from jamming & breaking wheel • Securely clamped after each adjustment Work rest is closely adjusted • Adjustments made only when wheel is stopped
- 13. 1910.215(b)(9) Exposure adjustment • Safety guards of the type where the operator stands in front of the opening, shall be so constructed so that the peripheral protecting member can be adjusted to the constantly decreasing size of the wheel • The distance between the periphery and the adjustable tongue guard shall never exceed one-fourth inch
- 14. 1910.215 (d) Mounting -Ring Test • Sound the wheel by tapping around the wheel periphery with a wood handled screwdriver* • Good wheel portions will “ring” like a bell • Cracks will sound “dead” *A non-metallic implement, wood mallets may be needed for larger wheels