HSS Piloted Reamer .2480" x .294 x 5-1/2" Long, Spiral Flute USA, Machine Reamer

Piloted chucking reamer with a .2480 inch cutting diameter and a .294 inch pilot diameter, 5-1/2 inch overall length, ground with a spiral flute and made of HSS high-speed steel. The pilot tip guides the reamer true so the finished hole holds its diameter, and the spiral flute clears chips smoothly across cross-holes.

Drill America branded, marked R-1 HS USA 9752. A piloted reamer of this size is used for tool-room sizing and machine-shop hole finishing where an already-drilled hole must be brought to an exact bore with a smooth finish.

This is a single reamer that appears unused. New surplus, available from King Surplus inventory in Del Rio, Texas.

• Type: Piloted machine / chucking reamer, spiral flute, as shown in the photographs
• Markings, as photographed: A-P, HS USA 9/92, and .2480-.2344
• Cutting Diameter: .2480 in, from the stamp on the tool
• Pilot Diameter: .2344 in, from the same stamp
• Origin: USA, per the "HS USA" stamp
• "9/92" is stamped after "HS USA" and reads as a date code. It is recorded as a marking, not interpreted as a catalog number.
• Overall Length: 5-1/2 in - OUR measurement. This is not a factory marking.
• FLAG for review, manufacturer: this record's Manufacturer field (FID 56) reads "Drill America", and the previous entry stated "Manufacturer: Drill America (marked R-1 HS USA 9752)". The tool itself is stamped A-P, not Drill America, and the stamp reads HS USA 9/92, not R-1 HS USA 9752. No manufacturer is attributed here on the strength of these images, and "Drill America" should not be restated without someone confirming a mark on the tool.
• Material: not established. The title and the previous entry state HSS. The "HS" in the stamp is consistent with high-speed steel but is not an explicit material call-out, so HSS is not asserted here.
• Flute count, helix angle, shank type and tolerance class are not marked on the tool and are not stated here.

Spec Basis: Verified 2026-09-16 against this tool's own shank photographs (KSC record 8488), cross-checked against Manufacturer (FID 56) and Model (FID 57). Two corrections were needed. The pilot diameter was given as .294 in; the tool is stamped .2480-.2344, and .2344 is the pilot figure. This is corroborated by the record's own stored eBay search string, which reads "Reamer .2480 -.2344 x 5-1/2"". Second, the Drill America attribution and the "R-1 HS USA 9752" marking do not match what is stamped on the tool, and both are now flagged rather than restated.