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The Alpha GUFD125F is a 125mm unitized finishing disc in 4S very fine grade, for pre-polishing metal. The GUFD125F runs to a maximum of 9,800 rpm with an optimal working speed of 3,600 rpm, and takes a 22.23 mm bore.
Between grinding a weld back and polishing it out sits the step where the surface still shows every scratch the last disc left. A unitized nonwoven disc carries the abrasive through a firm base rather than on a surface coating. That lets it blend surface defects rather than cut into the material.
The GUFD125F is a 4S very fine grade, so it belongs at the pre-polish stage rather than the stock removal stage. Alpha lists it for preparing stainless steel surfaces before polishing. It fits a standard angle grinder and ships as a single carded disc in a resealable pack.
Check the grinder speed first. The maximum operating speed for the GUFD125F is 9,800 rpm, and a grinder with a higher no-load speed must not be used with it. This is a finishing disc, not a cutting or grinding disc, so it is the wrong tool for stock removal. The 4S very fine grade sits at the pre-polish stage, so a coarser grade is needed where material has to come off.
(GUFD125F)
One. The GUFD125F is supplied as a single disc on a hangsell card, and the pack reseals after opening.
22.23 mm, which is the standard arbour size for a 125 mm angle grinder. The disc itself is 125 mm in diameter.
The maximum is 9,800 rpm and the optimal working speed is 3,600 rpm. Check the no-load speed on the grinder before fitting the disc, as a faster grinder must not be used with it.
Alpha lists it for preparing stainless steel surfaces for polishing, and for blending surface defects on metal. No other materials are listed for this disc.
The Alpha GUFD125F is available online from Sparky Direct, with Australia-wide delivery to any state or territory including regional areas. Sparky Direct is an Australian electrical wholesaler established in 2005, supplying more than 500,000 customers with transparent trade pricing.
The abrasive is concentrated through a firm nonwoven base rather than sitting on a coating. The disc wears back as it works, which suits blending surface defects without cutting into the material.
It is a 4S very fine grade. That places it at the pre-polishing stage, refining a surface rather than removing material. A coarser grade is the right choice where stock still has to come off.
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