| B | SK | SECTION B — PERFORMING OPERATIONS; TRANSPORTING |
| B23 | KL | MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR (punching, perforating, making articles by processing sheet metal, tubes, or profiles B21D; wire-working B21F; making pins, needles, or nails B21G; making chains B21L; grinding B24) |
| B23C | UKL | MILLING (broaching B23D; broach-milling in making gears B23F; arrangements for copying or controlling B23Q) |
| B23C 1/00 | HGR | Milling machines not designed for particular work or special operations |
| B23C 1/02 | UGR1 | | . | with one horizontal working-spindle |
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| B23C 1/025 | UGR2 | | . . | with working-spindle in a fixed position [2] |
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| B23C 1/027 | UGR2 | | . . | with working-spindle movable in a vertical direction [2] |
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| B23C 1/04 | UGR1 | | . | with a plurality of horizontal working-spindles |
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| B23C 1/06 | UGR1 | | . | with one vertical working-spindle |
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| B23C 1/08 | UGR1 | | . | with a plurality of vertical working-spindles |
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| B23C 1/10 | UGR1 | | . | with both horizontal and vertical working-spindles |
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| B23C 1/12 | UGR1 | | . | with spindle adjustable to different angles, e.g. either horizontally or vertically |
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| B23C 1/14 | UGR1 | | . | with rotary work-carrying table (work-tables for machine tools in general B23Q 1/00) |
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| B23C 1/16 | UGR1 | | . | specially designed for control by copying devices |
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| B23C 1/18 | UGR2 | | . . | for milling while revolving the work |
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| B23C 1/20 | UGR1 | | . | Portable devices or machines (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F 5/00); Hand-driven devices or machines [4] |
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| B23C 3/00 | HGR | Milling particular work; Special milling operations; Machines therefor (milling gear teeth B23F; milling of threads B23G 1/32) [2] |
| B23C 3/02 | UGR1 | |
| B23C 3/04 | UGR2 | | . . | while revolving the work |
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| B23C 3/05 | UGR2 | | . . | Finishing valves or valve seats [2] |
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| B23C 3/06 | UGR1 | |
| B23C 3/08 | UGR1 | | . | Milling cams, camshafts, or the like |
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| B23C 3/10 | UGR1 | | . | Relieving by milling (lathes or turning devices for relieving B23B 5/42) |
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| B23C 3/12 | UGR1 | | . | Trimming or finishing edges, e.g. deburring welded corners |
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| B23C 3/13 | UGR1 | | . | Surface milling of plates, sheets or strips [2] |
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| B23C 3/14 | UGR1 | | . | Scrubbing or peeling ingots or similar workpieces |
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| B23C 3/16 | UGR1 | | . | Working surfaces curved in two directions |
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| B23C 3/18 | UGR2 | | . . | for shaping screw-propellers, turbine blades, or impellers |
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| B23C 3/20 | UGR2 | |
| B23C 3/22 | UGR1 | | . | Forming overlapped joints, e.g. of the ends of piston-rings |
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| B23C 3/24 | UGR1 | | . | Making square or polygonal ends on workpieces, e.g. key studs on tools |
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| B23C 3/26 | UGR1 | | . | Making square or polygonal holes in workpieces, e.g. key holes in tools |
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| B23C 3/28 | UGR1 | |
| B23C 3/30 | UGR2 | | . . | Milling straight grooves, e.g. keyways |
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| B23C 3/32 | UGR2 | | . . | Milling helical grooves, e.g. in making twist-drills |
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| B23C 3/34 | UGR2 | | . . | Milling grooves of other forms, e.g. circumferential |
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| B23C 3/35 | UGR2 | | . . | Milling grooves in keys |
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| B23C 3/36 | UGR1 | | . | Milling milling-cutters (B23C 3/28 takes precedence) |
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| B23C 5/00 | HGR | Milling-cutters (for cutting gear teeth B23F 21/12) |
| B23C 5/02 | UGR1 | | . | characterised by the shape of the cutter |
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| B23C 5/04 | UGR2 | | . . | Plain cutters, i.e. having essentially a cylindrical or tapered cutting surface of substantial length (B23C 5/10 takes precedence) |
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| B23C 5/06 | UGR2 | | . . | Face-milling cutters, i.e. having only or primarily a substantially flat cutting surface |
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| B23C 5/08 | UGR2 | |
| B23C 5/10 | UGR2 | | . . | Shank-type cutters, i.e. with an integral shaft |
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| B23C 5/12 | UGR2 | | . . | Cutters specially designed for producing particular profiles (B23C 5/10 takes precedence) |
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| B23C 5/14 | UGR3 | | . . . | essentially comprising curves |
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| B23C 5/16 | UGR1 | | . | characterised by physical features other than shape |
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| B23C 5/18 | UGR2 | | . . | with permanently-fixed cutter-bits or teeth |
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| B23C 5/20 | UGR2 | | . . | with removable cutter-bits or teeth |
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| B23C 5/22 | UGR3 | | . . . | Securing arrangements for bits or teeth |
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| B23C 5/24 | UGR4 | |
| B23C 5/26 | UGR1 | | . | Securing milling-cutters to the driving spindle |
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| B23C 5/28 | UGR1 | | . | Features relating to lubricating or cooling |
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| B23C 7/00 | HGR | Milling devices able to be attached to a machine tool, whether or not replacing an operative portion of the machine tool |
| B23C 7/02 | UGR1 | |
| B23C 7/04 | UGR1 | | . | to planing or slotting machines |
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| B23C 9/00 | HGR | Details or accessories so far as specially adapted to milling machines or cutters (drives, control devices, or accessories, in general B23Q) |