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38 Online at www.imi-precision.com 1 38 MAGNETICALLY COUPLED RODLESS CYLINDERS For further information visit www.imi-precision.com, and use the new, improved search function. If you are unable to find the option you require please call: (937) 833-4033. SKETCH A Pull-oFF loAD RADiAl loAD A load that is applied parallel to the base plate, but perpendicular to the direction of actuation. Depending on bore size, the maximum side load will be at least 20% less than the maximum radial loading capacity. In this loading condition, the maximum load carrying capability is 496 pounds per bearing. Only two bearings are used to calculate the load carrying capability of the 1-1/4" bore unit. Size/Application Considerations (MCHL) 1. Check the loading condition requirements and find that condition below. See sketches A and B for illustration of loading conditions. 2. Depending on the loading condition, use the appropriate chart, graph or formula to help determine maximum allowable loads and/or moment arms. Each bore size of the magnetically coupled rodless high load guided cylinder has specific load-carrying capabilities. Shock absorbers can extend cylinder life when used properly. See subsequent section on shock absorbers to calculate maximum allowable kinetic energy before a shock absorber is required. Use the following procedures to determine the requirements for specific applications. Bore Maximum Load Maximum Moment Radial (lbs) Pull Off (lbs) Side (lbs) Axial (Ma) (in-lbs) Radial (Mr) (in-lbs) Cross (Mc) (in-lbs) 1-1/16" (106) 1440 992 1440 1111 435 1613 1-1/4" (125) 2480 220 992 261 385 1178 1-1/2" (150) 2480 992 1984 1488 2232 2976 Table 1. Maximum Allowable Loads and Moments* *Dynamic Ratings The values shown in Table 1 are the maximum allowable loads for the load carrying system. To achieve these values, the base plate must be fully supported along its full length and the load must be equally distributed among all four bearings. For best results, your application analysis should determine maximum loading on each bearing. Do not exceed 20 in/sec velocity or 15 cycle/minute cycle rate; the internal piston bearings will heat up and cause sluggish motion. A load applied perpendicular to both the base plate and to the direction of actuation. Load directed toward the base plate represents the maximum loading capacity of the system. Load directed away from the base plate reduces the system's load rating to approximately 40% of maximum radial loading. This is what's called the "pull-off" capacity. In this loading condition, the maximum radial load-carrying capability is 620 pounds per bearing. The maximum "pull-off" load in the same mounting condition is 248 pounds per bearing. NOTE: Exceeding the recommended loads can result in improper cylinder function: piston/carriage decoupling, unacceptable deflections, etc. Radial Load and Pull-off Load Side Load