The Automatic Trip Hammer is designed for driving the Split Tube Sampler and conforms to the requirements of BS 1377: Part 9: 1990 for carrying out the Standard Penetration Test (SPT) or Super Heavy Dynamic Probing (DPSH).
The hammer consists of a weight of 63.5 kg complete with pick-up and self-tripping mechanism that ensures that the weight has a free-fall of exactly 760 mm.
The inner shaft acts as a guide that permits the weight to drop with minimal resistance and ensures that the weight strikes the anvil squarely.
The drive rods screw securely into the base of the anvil, which is supplied with either a 1.1/2" B.S. whitworth or BW rod box connection.
The hammer is supplied with a safety cross bolt which secures the sliding outer sleeve to the inner guide rod when the hammer is not in use or during transport.
The overall length of the hammer is 1.8 m unextended and 2.6 m when fully extended. The total weight of the hammer is 105 kg
The following spare parts are available:
See also:
SPT Split Tube Sampler
SPT Drive Rods
Dynamic Probe Equipment
