13.C Power Saws and Woodworking Machinery.
13.C.01 Woodworking machinery must be operated and maintained in accordance with ANSI 01.1.
13.C.02 Guarding.
- Circular saws must be equipped with guards that automatically and completely enclose the cutting edges, splitters, and anti kickback devices.
- Portable power-driven circular saws must be equipped with guards above and below the base plate or shoe.
- (1) The upper and lower guards must cover the saw to the depth of the teeth, except for the minimum arc required to permit the base to be tilted for bevel cuts and for the minimum arc required to allow proper retraction and contact with the work, respectively.
- (2) When the tool is withdrawn from the work, the lower guard must automatically and instantly return to the covering position.
- Blades of planers and jointers must be fully guarded and have cylindrical heads with throats in the cylinder.
- Band saw blades must be fully enclosed except at the point of operation.
13.C.03 Automatic feeding devices must be installed on machines whenever possible. Feeder attachments must have the feed rolls or other moving parts covered or guarded so as to protect the operator from hazardous points.
13.C.04 The operating speed must be permanently marked on circular saws more than 20 in (50.8 cm) in diameter or operating at over 10,000 peripheral ft/minute (min) (50.8 peripheral m/s).
- Saws must not be operated at a speed other than that marked on the blade.
- When a marked saw is re-tensioned for a different speed, the marking must be corrected to show the new speed.
13.C.05 Radial arm power saws must be equipped with an automatic brake.
13.C.06 The table of radial arm or swing saws must extend beyond the leading edge of the saw blade.
13.C.07 Radial arm power saws must be installed in such a manner that the cutting head will return to the starting position when released by the operator. All swing cutoff and radial saws or similar machines that are drawn across a table must be equipped with limit stops to prevent the leading edge of the tool from traveling beyond the edge of the table.
13.C.08 Each hand-fed crosscut table saw and each hand-fed circular ripsaw must have a spreader to prevent the material from squeezing the saw or being thrown back on the operator.
13.C.09 Operating procedures.
- Band saws and other machinery requiring warm-up for safe operation must be permitted to warm up before being put into operation whenever the temperature is below 45ºF (7ºC).
- A push-stick, block, or other safe means must be used on all operations close to high-speed cutting edges.
- The use of cracked, bent, or otherwise defective parts such as saw blades, cutters, or knives is prohibited.
- A brush must be provided for the removal of sawdust, chips, and shavings on all woodworking machinery.
- Power saws must not be left running unattended.
Knowledge Check Choose the best answer for the question.
13-3. What is required on circular saws more than 20 in (50.8 cm) in diameter or operating at over 10,000 peripheral ft/minute (min) (50.8 peripheral m/s)?
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