Belt, disc, spindle & drum · review
A half-inch belt on an arm that the listing says pivots 50 degrees in one bullet and 55 in the next.
The end of it The only sander here that goes inside a slot, on a page that gives its pivot two angles.
Every figure below names its source. Each one is a manufacturer specification read off the listing itself. The judgments are ours.
The second feature: Range of Motion: 50°.
The third feature: pivot the belt up to 55 degrees.
Consecutive bullets, one movement, two numbers.
Five degrees is not much on a sanding arm, and the inconsistency is the point rather than the angle. Both are above.
The published Keter workbench on this shelf carries the same shape of fault in its cons: the listing gives 450 kg (992.1 lb) in the title and 453 kg (998.7 lb) in the features.
The narrowest abrasive on either half of this shelf, and the reason this machine exists.
A half-inch belt on a slim flat arm goes into a mortice, a slot, a dovetail socket, an internal corner — which a 125 mm (4.92 in) disc, a 76 mm (2.99 in) belt and even a 13 mm (0.51 in) spindle drum cannot reach, because the arm is flat and narrow rather than round.
It is a powered file, which is what the name says.
The published OSM100 on this shelf does inside curves. This does inside flats. They are not substitutes.
Published as two figures, variable by dial — and it is the only speed figure on the page.
A narrow belt at the top of that range cuts; at the bottom it finishes without burning, which on a slot in hardwood is where the heat goes.
The WEN 6321 on this shelf publishes thirteen feet per second, which is 780 feet a minute, on a belt six times wider.
A sanding machine is bought once and fed for years.
So the size of the belt, the disc or the sleeve it takes is a bigger decision than the motor: a common size is sold everywhere and cheaply, and an odd one ties the machine to one supplier at whatever price that supplier charges.
The published Scheppach BTS800 page on this shelf is recommended on exactly that ground — it publishes both consumable sizes, and both are the common ones — and the abrasives shelf in this catalog is where the arithmetic lands.
Half an inch by eighteen. The other machines on this shelf take 3 × 18, 3 × 21, 4 × 24, 4 × 36 and 915 × 100.
Five machines, five sizes, and no two of them share a drawer.
Three belts come in the box, which is three grit changes before the question arises.
Read on the day this page was built: $28 at the American Amazon shop.
Read from Keepa on the day this page was last revised; stock and price both move without notice.
Prices quoted in this text were read on 2026-10-07. The live price is at the top of the page.
| Type | File sander — a narrow belt on a slim arm, for slots and internal shapes |
|---|---|
| Belt size | 1/2 × 18 in — 13 × 457 mm (0.51 × 18 in), the narrowest abrasive on either half of this shelf |
| Belt speed | 1,080 to 1,800 feet per minute, variable by dial — 329 to 549 m (1079 to 1801 ft)/min |
| Pivot | The second feature states a range of motion of 50 degrees; the third states the belt pivots up to 55 degrees · Both are published |
| Belt changes | Tool-free, with an auto-tracking system stated to need no tensioning or adjustment |
| Supplied | Three abrasive belts, a dust port attachment and a stated two-year warranty |
| Motor | Not published as an amperage or a wattage |
| Part number | 6307 |
| Amazon reference | B072Q2FTLY |
| EAN | 0044459063070 |
Both are published, in consecutive features. The second reads "Auto-tracking belt system requires no tensioning or adjustments. Range of Motion: 50°"; the third reads "Pivot the 1/2-by-18-inch belt up to 55 degrees to meet the needs of any project". Five degrees is not much on a sanding arm and the inconsistency is the point rather than the angle — two numbers for one movement, one page apart. Both are above. The published Keter workbench on this shelf has the same shape of fault in its cons: the listing gives 450 kg (992.1 lb) in the title and 453 kg (998.7 lb) in the features.
The places nothing else fits. A half-inch belt on a slim arm goes into a mortice, a slot, a dovetail socket or an internal corner — which a 125 mm (4.92 in) disc, a 76 mm (2.99 in) belt and even a 13 mm (0.51 in) spindle drum cannot reach, because the arm is flat and narrow rather than round. Think of it as a powered file, which is what the name says. The published OSM100 spindle sander on this shelf does inside curves; this does inside flats. They are not substitutes.
Less here than on any other machine on this shelf. A half-inch belt cannot be loaded hard enough for the motor to be the limit — the belt is the limit, and it is published at 1,080 to 1,800 feet per minute. What a rating would say is how long the tool survives being leaned on, and nothing on this page addresses that. It is the only machine on either half of this shelf with no motor figure at all, and on this one tool it is the least consequential omission.
Between woodworking machines of the same category and nearby price. Shown: what they all state. A half-filled column says nothing.
| Model | Price | Type | Motor |
|---|---|---|---|
| WEN 6307 variable speed file sander | $28 | File sander — a narrow belt on a slim arm, for slots and internal shapes | Not published as an amperage or a wattage |
| Skil SR232301 detail sander | $37 | Detail sander, stated 4-in-1 with three additional detail attachments for large surfaces, corners, edges and contours | 1.2 A — the smallest motor on either half of this shelf · No wattage published |
| WEN 6321, 3 × 21 in belt sander | $39 | Portable belt sander | 7 A · No wattage published |
| Skil 7510-01, 3 × 18 in belt sander | $48 | Portable belt sander | 6.0 A, stated to sand any type of wood surface · No wattage and no belt speed published |
Cleaning up a mortice, a slot or an internal corner no other sander on this shelf can enter
Amazon reports what buyers took in the month before this page was last checked: at least 1,000.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for woodworking machines and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
12 V · Ø 125 mm (4.92 in) · L-BOXX 136 · no price, no barcode
A bundle we cannot price, cannot verify and cannot find in any market but one — which is the whole review.
Best for: Nobody, until the listing carries a price and a barcode
5 in pad · 3 A · 8,000–12,000 OPM · counterweight · dust-sealed switch
The only random orbit sander on either half of this shelf with a price on its listing — and it publishes an orbit range.
Best for: Finishing a surface before a finish goes on it, with a DEWALT extractor already in the shop
≈ $79
Belt and disc · bench · €111
The cheapest belt-and-disc combination here, and the machine that stops you sanding curves by hand.
Best for: Sanding to a line on small parts, where hand sanding is slow and imprecise
≈ $360
