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Glass Cutter: Monce's Hardened Steel Wheel

S. G. Monce · Public domain (expired patent)

작성자

Bubbles

23. 10월 2026

Glass Cutter: Monce's Hardened Steel Wheel

S. G. Monce's glass cutter (US 91,150, 1869): a small hardened steel wheel, bevelled from both sides to a sharp edge, turning on its own journals in a riveted frame on a handle. Drawn across the glass under pressure it rolls and scores a fine line like a diamond's, for a tenth of a diamond's cost, and it needs less skill. It is the wheel cutter still used today. The patent gives no sizes, steel grade or hardening method. The picture: the patent's drawing sheet.

중급

1 day

안내

Turn the steel wheel

Turn a steel roller smooth and round, with a solid journal (d) at each end. Its sides (a) run parallel for a short way, then bevel toward each other to meet about midway in the cutting edge (D). Each bevel (c) stands about 45° to the axis, so the two faces are near right angles, or a very little more obtuse. Ours: a hardenable carbon steel and the lathe.

이 단계의 재료:

고탄소강 빌릿1 개

필요한 도구:

금속 선반

선반 절삭 공구

쇠톱(핵소)

Harden the wheel

Harden the turned wheel. The patent does not say how; ours: heat it in the forge and quench it, as in the connected heat-treatment blueprint.

필요한 도구:

단조 화덕

물

Make the two-piece frame

Make the frame (B) in two halves. Near one end drill a bearing in each half for the journals. Keep each journal a little shorter than the thickness of the frame's sides (e), so a straightedge laid against the sides never touches the journal ends. Ours: steel strip, drill and file.

이 단계의 재료:

탄소강 띠강1 개

필요한 도구:

쇠톱(핵소)

손 드릴

금속용 줄

바이스(만력)

Rivet the wheel into the frame

Set the wheel's journals in the bearings, close the two halves on it and rivet them together. The wheel must turn freely.

이 단계의 재료:

강철 리벳1 개

필요한 도구:

볼핀 해머

바이스(만력)

Fit the handle

Fix the frame to a handle of any form, by any sound means. Monce used the handle of an ordinary diamond glass cutter.

이 단계의 재료:

공구 자루1 개

필요한 도구:

볼핀 해머

Score and break glass

Draw the cutter quickly across the glass, pressing as you go, so the wheel rolls. It leaves a fine line like a diamond's. Guide it along a straightedge; the frame's sides ride on the edge. Break the glass along the line.

필요한 도구: