Product Name: Spt Automatic Trip Hammer, Spt Tools Model NO.: Automatic SPT Hammer Type: Spt Equipment Condition: New Drop Weight: 63.5 Kg Type 2: Standard Penetration Test Reliability: Higher Quality: Good Quality Usage: Soil Testing, Geotechnical Engineering Transport Package: in Plywood Case Specification: DCDMA, CDDA, ISO Origin: Changsha, Hunan, China HS Code: 8431432000 Product Description Antomatic Trip Hammer:Components:1Outer Tube Assembly C/W Pawls2Inner Guide Shaft3Drop Weight4AnvilThe Automatic Trip Hammer is manufactured to comply with the Standard Penetration (SPT) to BS 1377: Part 9: 1990. SPT Drive Rods and a Split Tube Sampler are connected to the base of the anvil, and driven into the ground by the falling weight.The Automatic Trip Hammer comprises a weight of 63.5 kg complete with pick-up and self-tripping mechanism that ensures the weight has a free-fall of exactly 760mm. 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 Anvil thread is usually be processed with a 1-1/2" B. S. Whitworth to fit our standard SPT Rods.Adaptors to other types of drill rod can be supplied on request.The overall length of the hammer is 2.6m extended and 1.8m when unextended. The total weight of the hammer is 107 kg.