Capacity: 125 ton static load in 1 inch increments. Standard screw adjustability is 5 inches, however, screw adjustment up to 12 inches is available. See Standard Safety Block SB-1for configuration and dimensions. The adjusting screw and nut assembly provides easy adjustment normally both up and down by hand. These screw devices are used instead of wedges on the SB-1 adjustable safety press blocks, allowing for greater span of flexibility. The adjusting screw and nut assembly is mounted securely on top of the safety block at the factory. This assembly is used in conjunction with a bottom end cap for additional stability and safety. The assembly allows up to 5 full inches of screw adjustment.
Heavy-Weight adjustable safety blocks are available with handles, holders, and power cut-offs. View options page for details. For more information and pricing: 
Please note:
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Many materials are available for use in blocking the ram and upper die of a press. 6061-T6 aluminum offers much higher extruded strength per cubic inch than any other know press safety block material on the market. When static load cpacity of the material is compared, aluminum becomes the clear choice.
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Use only certified material, preferably aluminum. Aluminum is malleable, and will deform. Magnesium is supposed to fracture at a 45 degree angle, but can fracture and cause shrapnel. Steel should never be considered due to potential shrapnel issues.
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.250" of daylight. Under no circumstances should there be more space between the top of the Die Safety Block and the die, or between the top of the Die Safety Block and the slide if the die is absent. It is absolutely critical to accurately calculate the needed Safety Die Block length. An opening greater than .250" changes the force of a moving slide from static to dynamic.
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If two Die Safety Blocks are needed, they should be placed at diagonal corners.
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