German sna tools sna models sna prices

sna tools are material handling tools for lifting or jacking heavy loads, a type of intermittent-duty tool for lifting heavy objects. Most lifting tools begin vertical or combined vertical and horizontal travel after the lifting attachment picks up the load, unload at the destination, then return empty to the pickup point to complete one work cycle before performing the second lift. Generally, during operation, picking up, transporting, and unloading are performed sequentially, and the operation of each corresponding mechanism is intermittent. Lifting tools are mainly used for handling piece goods; when equipped with a grab bucket, they can handle bulk materials such as coal, ore, and grain; when equipped with a ladle, they can lift liquid materials such as molten steel. Some lifting tools, such as elevators, can also be used to carry people. In certain application scenarios, lifting equipment is the primary working tool; for example, cranes for loading and unloading materials at ports and stations are the primary working tools.

sna tool classification

1) Squeeze-exhaust suction cups expel all air from the cup by downward squeezing force, creating a negative pressure state inside to hold the workpiece. They have advantages such as simple structure, light weight, and low cost. However, the suction force is not large, so they are mostly used for workpieces that are not too large in size, thin, and light. 2) Airflow negative-pressure suction cups use an airflow control valve to inject compressed air from an air pump through a nozzle, forming a high-speed jet that removes air from the suction cup cavity, creating negative pressure inside so the cup holds the object. If compressed air is available at the worksite, using this type of suction cup is convenient and low-cost. 3) Vacuum pump exhaust suction cups use an electromagnetic control valve to connect the vacuum pump to the suction cup. When the control valve evacuates air, the air in the suction cup cavity is removed, creating negative pressure to hold the object. Conversely, when the control valve connects the suction cup to the atmosphere, the cup loses suction and releases the workpiece. The suction force of vacuum pump suction cups mainly depends on the size of the suction area and the degree of vacuum in the cup wall (referring to the thinness of the air in the inner q cavity). This type of suction cup is reliable and provides greater suction force, but it requires a vacuum pump and an airflow control system, resulting in higher costs. 4) Mechanical clamping type: Structure of a straight-bar dual-cylinder translational gripper. The gripper fingers are mounted on a straight bar with finger mounting seats. When pressurized gas enters the rod-side chambers of the single-acting dual cylinders, the two pistons move toward the center, clamping the workpiece; when no pressurized gas enters, springs push the two pistons outward, releasing the workpiece. A flow divider valve is installed in the cylinder intake line to ensure synchronized piston movement. This type of end effector is used in loading/unloading and assembly workstations.

sna tool maintenance

1) Correct air supply system: The inlet pressure at the tool inlet (not the compressor outlet pressure) is generally 90PSIG (6.2Kg/cm^2). Pressure that is too high or too low will impair tool performance and service life. The intake air must contain sufficient lubricating oil to ensure adequate lubrication of the pneumatic motor inside the tool (place a white paper at the tool exhaust to check for oil stains; the presence of oil stains is normal). The intake air must be free of moisture; it is inappropriate if the compressed air has not passed through an air dryer. 2) Do not arbitrarily disassemble tool parts before operation, as this will affect operator safety and cause tool damage. 3) If the tool has a slight fault or cannot achieve its original function after use, do not continue to use it; inspect it immediately. 4) Regularly (approximately once a week) inspect and maintain the tool, adding grease (Grease) to rotating parts such as bearings, and adding oil (Oil) to the pneumatic motor. 5) When using various tools, strictly follow all safety regulations and operating instructions. 6) Select appropriate tools for the job; tools that are too large can easily cause work injuries, while tools that are too small can easily cause tool damage.

sna tool usage

1) Plane blade adjustment: When installing the plane blade, first fit the blade with the cap iron, control the distance between their cutting edges, and then insert it into the plane body. With the cutting edge close to the sole, add the wedge, press down slightly, hold the left corner of the sole with the left hand, and use the thumb to firmly hold the wedge, cap iron, and plane blade. Use a hammer to adjust the cutting edge so that it protrudes from the mouth. The amount of protrusion is proportional to the cutting depth: more for rough planing, less for fine planing. To check the blade protrusion, lift the plane with the left hand, sole facing up, and look backward with one eye to detect it. If the protrusion is inappropriate, lightly tap the upper end of the blade. If it protrudes too much and needs to be retracted, lightly tap the rear end of the plane body. If one corner of the cutting edge protrudes, lightly tap the upper side surface of the same corner of the blade. 2) Planing essentials: When planing, extend the index fingers of both hands forward to press on the plane body, press the thumbs on the rear of the plane blade, and grip the handles tightly with the remaining fingers and palms. Keep the plane body level and apply uniform force with both hands. When pushing forward, increase the force with both thumbs and apply slight pressure with the index fingers; gradually reduce the pressure as you reach the front end until no pressure is applied. When retracting, slightly lift the rear of the plane body with your hand to prevent the cutting edge from dragging on the wood surface, which causes dulling. When planing long stock, place the left foot forward, then follow with the right foot. Before planing long stock, check whether the surface to be planed is heartwood or sapwood; generally, heartwood is cleaner and has clearer grain than sapwood. If it is heartwood, plane in the direction from root to tip; if it is sapwood, plane in the direction from tip to root. Planing along the wood grain saves effort. Otherwise, it is easy to cause 'tear-out,' resulting in a rough, uneven surface and requiring significant effort. When starting a cut, the plane sole should fit tightly against the wood surface; do not lift the front of the plane at the beginning. When reaching the end, do not let the front of the plane dip (commonly known as 'nodding'). Otherwise, the middle part of the planed wood surface will bulge unevenly, a common mistake among beginners that must be corrected.

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