Connection UNC 1 1/4 Inch 400 mm Drill Bits Extension Usable Lengths 350 mm Holder Made of 42Cr4 Steel for Diamond Drill Bit Core Drill Bit Diamond Core Drill Bit (1 Piece)

• Features: connection: 1 ¼ inch UNC (approx. 32 mm inside), hexagonal with 41 mm spanner width
• Made of 42Cr4 steel (DIN 1.7045): Made of 42Cr4 steel, it has a strength that is 2 times higher than conventional materials, as well as a service life that is 2 times longer.
• 42Cr4 steel (DIN 1.7045) is a kind of German standard material used for the production of various types of hot forming tools, hot embossing tools and tool steel. This material is characterised by high strength, good toughness, good hardening and excellent impact resistance. It is widely used in machinery, shafts, gear shafts, wheels and tools.
• Features: connection: 1 ¼ inch UNC (approx. 32 mm inside), hexagonal with 41 mm spanner width, total lengths: 400 mm, usable lengths: 350 mm.
• Notes: it only works with 1.1/4 inch UNC threads. Pay attention to the thread of the core drill. This adapter cannot be used in hammer mode.

Notes: 1. Please check whether the plug is compatible before purchasing. 2. Note that it only works with 1.1/4 inch UNC threads. Pay attention to the thread of the core drill. This adapter cannot be used in hammer mode. Features: - Connection: 1 ¼ inch UNC (approx. 32 mm inside). - Material: 42Cr4 steel (DIN 1.7045) steel. - Total lengths: 400. - Usable lengths: 350. - Water supply: continuous bore, so that the water supply is possible. - Extension shape: hexagonal with 41 mm wrench width (SW 41). Mechanical properties Density: 7.7-8.03 1000 kg/m3. Poisson ratio: 0.27-0.30 Modulus of elasticity: 190-210 GPa. Tensile strength: 1158 MPa. Yield strength: 1034 MPa. Elongation: 15%. Reduction of range: 53%. Hardness: 35 HB. Thermal properties Thermal conductivity: 42.7 W/m.K. Specific heat: 477 J/kg-K Physical properties Thermal expansion: 16-17 e-6/K. Thermal conductivity: 16-16 W/m.K. Specific heat: 500-500 J/kg.K. Melting Temperature: 1370-1400°C Operating Temperature: -40-500°C Density: 8000-8000 kg/m3. Resistance: 0.7-0.7 ohm.mm2/m