2. Precautions (1) If there is no taper or bowl-shaped grinding head, a cylindrical grinding wheel can be used, but the shank should be ground at an angle when it is ground or clamped. Grinding heads and shanks should not be too small to avoid rigidity.

(2) The chuck to be ground can only be fastened by bolts on the spindle flange for processing. It is strictly forbidden to clamp the chuck to be repaired with the chuck to prevent the chuck from flying out.

(3) Because the centrifugal force generated by the high-speed rotation causes the claws to automatically tighten outward, it is not necessary to fix the claws during grinding.

(4) It is forbidden to stand before and after the chuck at work, and a protective cover or protective net should be installed to prevent the grinding wheel from flying out and hurting people.

(5) Try to choose high speed when the equipment allows, generally it is appropriate to produce obvious sparks. Reverse grinding is prohibited to prevent the grinding head or chuck from loosening and injuring people.

(6) If the lathe has a taper, the claws will also be tapered, and the tool can be fed midway to compensate for the taper.

3. Advantages (1) Fast, generally can be ground in about 15 minutes.

(2) It is simple and convenient to manufacture, and the grinding head can be used only after turning in the direction and then tightening, and the service life is long and the cost is low.

(3) The amount of grinding is very small, generally about 0.1 mm each time.

(4) Regardless of the hardness of the jaws, even the claws with the solder joints can be smoothed and smoothed, and the surface roughness Ra can reach 0.8 μm.

(5) The amount of runout of the claws after grinding can generally meet the requirements, and the coaxiality of some chucks can reach 0.02mm when clamping the workpiece.

(6) This method is suitable for most horizontal lathes and some CNC lathes, which can significantly improve the work efficiency and processing quality of the lathe. A lathe with similar specifications can share a single tool.

(7) Extends the life of the three-jaw self-centering chuck and reduces the consumption.

4. Inadequacies (1) Only the long clamping surface of the positive jaw and its end face can be ground, and other parts cannot be ground.

(2) Small chucks (<160mm) and hydraulic chucks and pneumatic chucks cannot be ground using this method.

(3) The grinding effect of some lathes with low speed and some old chucks is generally or not ideal.

For more articles, please refer to "Mechanical Workers" Cold Processing 2007 No. 1

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Culture Plates

Cell Culture plates provide the right environmental surface to cultivate microorganisms. Choose from a variety of treated and untreated plates and dishes in multiwells or uniform flat bases. Some of the features include optically-clear for easily viewing cells, stacking beads for easier handling, and gamma sterilized and certified nonpyrogenic.