Double cutter roller

When we process a seamless steel tube with a length of 3m and φ100mm, the workpiece requires a surface roughness value of R_a3.2μm and a machining allowance of 10mm. Due to the long length of the drum, poor rigidity, and a small amount of bending, the entire allowance cannot be removed by one knife. To this end, we reversed from left to right and installed two 75° left-handed knives on the tool holder for simultaneous turning.

Centrifuge Tube Rack

At present, in the process of isolation and preparation of various stem cells from various tissue sources, Centrifuge Tubes with a volume of 15ml and 50ml are used.
It is one of the low-value consumables with high usage rate. It is generally installed on a dry foam rack with the package or in bulk. When used, it is taken out by the operator and placed on the plastic centrifuge tube rack in the ultra-clean workbench. The common centrifuge tube rack can only make the centrifuge tube stand upright. When transferring liquid or needing centrifugation, the operator should hold the centrifuge tube in the left and the night gun or aspirator in the right. If it is necessary to transfer a large amount of liquid reagents or perform gradient centrifugation operations, such as density gradient centrifugation to separate mononuclear cells, the operator needs to hold the centrifuge tube with the right hand for a long time and tilt the centrifuge tube, which often causes the operator's wrist joint pain. At the same time, it will also affect the liquid superposition effect, which will easily lead to the mixing of liquids of different densities, resulting in the failure of the experiment.

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