DIN 6349-5:1978-03

1 Scope
2 Other relevant Standards
3 Dimensions
      3.1 Concentricity tolerances
             3.1.1 Three-jaw drill chucks Form A, AG and
                      AM with fastening by internal cone
             3.1.2 Three-jaw drill chucks Form B with
                      fastening by threaded hole and Form C
                      with fastening by threaded pin
             3.1.3 Test Instructions
4 Material and hardness
      4.1 Material
             4.1.1 Chuck jaw and V block (all types)
             4.1.2 Keying ring (all types)
             4.1.3 Chuck body, Types P and M
             4.1.4 Chuck body, Type L
             4.1.5 Keys
      4.2 Hardness
             4.2.1 Chuck jaw and V block of drill chucks,
                      Types P and M
             4.2.2 Chuck jaw and V block of drill chuck,
                      Type L
             4.2.3 Keying ring
             4.2.4 Chuck body, Types P and M
             4.2.5 Chuck body, Type L
             4.2.6 Key
5 Test torques and key tightening torques
6 Type
      6.1 Three-jaw chuck, Form A
      6.2 Keying ring
      6.3 Teeth of the keying ring
      6.4 Number of teeth
      6.5 Three-jaw drill checks and keys
7 Marking

The technical conditions of delivery in this Standard apply to key-type three-jaw drill checks according to DIN 6349 Part 1 up to Part 3 and DIN 6349 Part 4 (Preliminary Standard).