საშკურკი (ლენტური / დისკური)

Pick the family of sander before you pick the model

The family decides more than the model does. Benchtop belt-and-disc machines – the BT range plus the TS305 and TSM250 disc sanders – shape and true small parts held by hand against a table. Oscillating edge belt sanders, the KOS models, sand long edges and curves on frames and standing panels with a belt that moves up and down as it runs, so the abrasive wears evenly and does not burn. Oscillating spindle sanders, the OSS models and the OBS100A, clean internal curves and cut-outs that no flat table can reach. Drum calibrating sanders, the ZS models, take glued-up panels to a uniform thickness. The PSM2 and PSM3 are 200 mm drum sanding machines rated IP 55.

Sizing a drum calibrating sander

Sanding width is set by the widest panel you glue up, because a panel wider than the drum has to be turned and sanded in two overlapping passes. Thickness capacity is the number that catches buyers out: the ZS400U sands 400 mm wide and passes stock from 5 to 130 mm thick, while the ZS560U trades that down to 80 mm to gain 160 mm of width on the same 2250 W S6 motor and 132 mm drum. Above those, the ZS635NEO runs two 127 mm drums across 630 mm at 7 to 125 mm thick, the ZS640P works 640 mm wide from 7 to 127 mm, and the ZS970P carries coarse and fine abrasive on two drums across 970 mm and swallows stock up to 304 mm thick.

Single-phase or three-phase supply

Mains supply removes models from the shortlist quickly. Every BT bench machine, the TS305, the TSM250, the PSM2, the PSM3, the ZS400U, the ZS560U and the ZS560FU are 230 V machines. The KOS2600C, the KOS3000C and the OSS200 are 400 V only, the KOS2510N is catalogued in both 230 V and 400 V, the ZS635NEO is the only ZS offered in 400 V, and the ZS640P is available as a single-phase machine. Check the supply at the intended machine position before the quotation is issued.

Floor space and extraction

Extraction is not optional on a sander. Sanding produces respirable dust rather than chips, so each machine needs a connection sized to its port and an extractor with enough airflow to serve every port at once – the TSM250 has a 35 mm port, the TS305 a 53 mm port, and the KOS3000C a double dust collection system feeding both the sanding unit and the table. Edge belt sanders need clear floor on both sides for the length of the workpiece, not just the machine footprint, and drum calibrating sanders need infeed and outfeed room equal to the longest panel.

Abrasives and what separates the cheap end from the dear end

Abrasives are the running cost and are budgeted separately: belts, discs and sleeves in several grits, replaced far more often than any other part. The ZS635NEO arrives with K80 and K100 belts fitted and the OSS75A with six K80 sleeves from 15 to 78 mm, but a working shop stocks spares from day one. Between the cheap and dear ends of this category the money buys duty rating rather than a different result – continuous S1 output against short-time S6, cast iron tables against pressed steel, an independent oscillation motor on the KOS2600C, frequency-controlled drum speed on the ZS560FU, and two drums instead of one on the ZS635NEO and ZS970P.