Robco Expert

  SELECTING AN OIL FOR A GEARBOX!   Thomas Cipriani – Product Specialist at Robco When selecting what oil to put into a gearbox we must consider 2 key items: Gear m etallurgy OEM spec ifications r equiring an oil with additives for : Extreme Pressure Rust & Oxidation W ith m etallurgy, t he main concern is with yellow metals (copper, bronze, etc..) Extreme Pressure o ils CANNOT be used as they will attack ing yellow metals. The gearbox OEM specs wi ll call for an oil with either Extreme Pressure additives (meant for heavily loaded bearings) or an oil with Rust & Oxidation additives (most commonly used in gear reducers). The wrong oil in the gearbox will cause premature failure of the gears, so please make sure to verify before switching or selecting your gearbox oils!

High temperature gasket comparison Lotfi Grine, Eng. – Product Specialist at Robco High Temperature Gaskets Gaskets made from elastomers achieve a seal at minimum mechanical load, because of their intrinsic low porosity. Elastomers are also added to enable fibrous-based gaskets to achieve good sealability. However, even the best elastomers or polymers like silicone and PTFE cannot be used at continuous elevated temperatures, above 260°C (500°F), except for a few exotic and very expensive materials that can be used up to 325°C (650°F). What materials can you then choose from ? If we remove chemical resistance from the equation, it will depend mostly on 3 factors : maximum temperatures maximum pressure flange and bolting set-up. This table lists these factors for the various gasket materials available: Gasket Material Continuous Temperature Pressure Load to obtain a seal Sealability  

  Top 5 Differences Between More Traditional Extruded Nylon and Cast Nylon Thomas Cipriani – Product Specialist at Robco 5 – A cast nylon material inherently has less stress than extruded nylon ,  which then allows it to handle higher levels of impact 4- Lower moisture absorption gives cast nylon a higher dimensional stability than extruded nylon which then allows it to be used in more humid applications with less concern for dimensional change which would then change the characteristics of the nylon 3 – The more crystalline structure of cast nylon gives it a higher strength than extruded nylon   therefore allowing it to have a higher tensile, flexural and compressive resistance  2 – Cast nylon is available in smaller diameter rod than extruded nylon  is when looking at premium bearing grades  therefore giving you more dimensional options for rods 1 – Cast nylon has a 20 degree higher operating temperature than extruded nylon   allowing it to handle higher temperature applications when