Difference in 18v grinders?

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Interior designer / Decorator
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I see Bosch do a few different 18v grinders. I understand about the X lock versions but what is the difference in the 18v 7 125 and the 18v 10 and the 18v li versions?

This post was edited by graham on 29.03.2021, 14:45 o’clock
Reason: Spelling

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I don't know if you will get a reply from Bosch on here as they don't seem to respond to messages very well? The 18v bit is self-explanatory The 7, 10, 15 etc refers to the equivalent power if a mains grinder in watts. Ie. 7 = a 700w corded grinder, 10= a 1000w corded grinder. The 3 numbers are the disc size ie. 115=115mm / 4.5" 125=125mm /5" You can put a 4.5" disc on a 5" grinder but the 5" runs at a lower rpm. Any letters after that show any extra features ie. P= paddle switch S = variable speed control C = connected with bluetooth. Note the C only means it will accept a bluetooth module not that the module is necessarily included with the grinder