Making other particular articles

BPERFORMING OPERATIONS TRANSPORTING B21Mechanical metalworking B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING METAL

B21D53/00Making other particular articles

B21D53/02heat exchangers or parts thereof B21D53/022Making the fins B21D53/025Louvered fins B21D53/027by helically or spirally winding elongated elements B21D53/04of sheet metal B21D53/045by inflating partially united plates B21D53/06of metal tubes B21D53/08of both metal tubes and sheet metal B21D53/085with fins places on zig-zag tubes or parallel tubes B21D53/10parts of bearings sleeves valve seats or the like B21D53/12cages for bearings B21D53/14belts B21D53/16rings B21D53/18of hollow or C-shaped cross-section B21D53/20washers B21D53/22with means for preventing rotation B21D53/24nuts or like thread-engaging members B21D53/26wheels or the like B21D53/261pulleys B21D53/262with inscriptions or the like B21D53/264wheels out of a single piece B21D53/265parts of wheels B21D53/267blower wheels B21D53/268wheels having spokes B21D53/28gear wheels B21D53/30wheel rims B21D53/32wheel covers B21D53/34brake drums B21D53/36clips, clamps, or like fastening or attaching devices B21D53/38locksmith's goods B21D53/40hinges B21D53/42keys B21D53/44fancy goods B21D53/46haberdashery B21D53/48buttons B21D53/50metal slide-fastener parts B21D53/52fastener elements Attaching such elements so far as this procedure is combined with the process for making the elements B21D53/54slides B21D53/56stops B21D53/58end-pieces for laces or ropes B21D53/60cutlery wares garden tools or the like B21D53/62spoons table forks B21D53/64knives scissors cutting blades B21D53/642scissors B21D53/645safety razor blades B21D53/647mower blades B21D53/66spades shovels B21D53/68rakes, garden forks, or the like B21D53/70handle portions B21D53/72sickles scythes B21D53/74frames for openings B21D53/745Joining mitred profiles comprising punching the profiles on a corner-angle connecting piece B21D53/76writing or drawing instruments B21D53/78propeller blades turbine blades B21D53/80dustproof covers safety covers B21D53/82perforated music sheets pattern sheets B21D53/84other parts for engines B21D53/845Making camshafts B21D53/86other parts for bicycles or motorcycles B21D53/88other parts for vehicles B21D53/883reflectors B21D53/886leaf springs B21D53/90axle-housings B21D53/92other parts for aircraft