What backing flange should be used with the 6" D28144 and D28144N grinders?
The 633257-00 is the smaller backing flange that has a yellow o-ring attached, it is not stamped steel (actually made from molded powdered metal). This backing flange is used for all wheels and grinders under 6" and 6" type 1 (flat) wheel.
Stamped steel backing flange is larger to support the larger 6" TYPE 27 (depressed center) WHEELS ONLY. These are ANSI B7.1 regulations, not ours. The instruction manual explains how they are used and proper guarding.
See the attached document for information on what these flanges actually look like.
What DEWALT grinders will the DWE4606 Cut Off Guard fit?
The DWE4606 Cut Off Guard will fit the following DEWALT grinders: D28144 D28144N D28066N D28410 D28166