[See KNURL v.] The action of the verb KNURL; also concr. knurled work.
1611. Cotgr., Goderon,… a fashion of imbossement vsed by Goldsmithes, &c., and tearmed knurling.
1862. Mayhew, Lond. Labour, IV. 377. Then you file the edges of the coin to perfect the ‘knerling.’
1875. Knight, Dict. Mech., 1536/2. Nurling, the indentations or fluting on the edges of coins, the heads of temper and set screws, and similar objects.
attrib. 1875. Knight, Dict. Mech., 1536/2. Nurling-tool, a milling-tool. One for indenting the heads of temper and tangent screws, etc.
1879. Sci. Amer., XL. 223. Knurling tool.
