Constructional features of components specially designed for boring or drilling machines; Accessories therefor (working-spindles, bearing sleeves therefor B23Q1/70; for machine tools in general B23Q)

Child Classifications

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• B23B 47/26 Liftable or lowerable drill heads or headstocks; Balancing arrangements therefor
• B23B 47/28 Drill jigs for workpieces (equipment for setting or guiding the drill B23B49/00)
• B23B 47/30 Additional gear with one or more working-spindles attachable to the main working-spindle and mounting the additional gear
• B23B 47/32 Arrangements for preventing the running-out of drills or fracture of drills when getting through
• B23B 47/34 Arrangements for removing chips out of the holes made; Chip- breaking arrangements attached to the tool