Stihl TS 500i Instruction Manual - Page 23

surrounding objects. Make sure that "run-off" will not cause any type of environmental damage or come into contact with electrical sources. WARNING STIHL recommends the use of only STIHL-branded cutting wheels on your cut-off machine. Use of non-STIHL cutting wheels may be extremely dangerous. See the chapter "Reducing the Risk of Kickback Injury" in this instruction manual. WARNING To reduce the risk of electrocution to you or bystanders, do not allow water or sludge to contact live electric wires or other electrical power sources. WARNING To reduce the risk of injury from wheel breakage when wet cutting with any composite wheel: 1. Make certain water does not flow on a wheel that is not running, since the wheel will absorb water, which will affect wheel balance. 2. Be certain water is applied to both sides of wheel, since uneven distribution can cause "one sided" wear. 3. After finishing work, run the cutting wheel at normal operating speed for about 3 to 6 seconds without water so that the remaining water is flung off. Respiratory Protection WARNING The cutting wheel must be supplied with at least 20 fl. oz. (0.6 liters) of water per minute for proper dust suppression. Inhalation of airborne crystalline silica can cause serious or fatal injury or illness, such as kidney disease and respiratory diseases, including silicosis and lung cancer. To reduce the risk of serious or fatal respiratory disease or other illness when this flow rate cannot be achieved, maintained or confirmed, the operator and any bystanders should always wear a NIOSH-approved respirator that is rated for the material being cut and appropriate for worksite-specific conditions. The respirator must have an Assigned Protection Factor sufficient to provide the level of respiratory protection needed for worksite-specific conditions and the material being cut. Even if wet cutting at the recommended flow rate, an operator who is working with the machine for more than two hours in one day, along with any bystanders, should always wear a NIOSH-approved respirator that is rated for the material being cut and appropriate for worksite-specific conditions. Consult your employer for information regarding worksite conditions and the material being cut. Your employer is likely to have in place an OSHA-required respiratory protection program and can provide information regarding the type and level of respiratory protection English needed for your worksite. Information is also available from OSHA at www.OSHA.gov. Points to be Noted with Diamond and Composite Cutting Wheels Object to be cut - Must be fully supported; - Must be secured so that it cannot roll or slip away; and - Must be protected against vibration and movement. The cutting sequence There are many ways to cut materials and objects with a cut-off machine. The operator and/or his supervisor, with knowledge of the job site conditions and requirements, always must exercise good judgment and discretion in determining how to safely complete a cutting task. The methods described in the following sections, while constituting proven techniques, are illustrative only and are not meant to substitute for the judgment of the experienced workmen with direct knowledge of on-site conditions. However, the cutting sequence is important. The last cut must always be made in such a way that the cutting wheel cannot become pinched, bound or clamped and so that the operator, coworkers and bystanders are not at risk of being injured by a falling part that has been cut off or out, or by cutting debris or sparks. TS 480i, TS 500i 21