Wheel must be used with safety guards. The actual rotational axis of the wheel and its axis of rotation through the center of mass deviation from parallel state called static unbalance wheel. This is usually due wheel uneven density, both ends of the hole and the surface is not parallel or coaxial cylindrical deviation has caused.
2013年9月13日星期五
Linseed oil modified phenolic resin, etc.
Modification can be introduced via an ether bond in the structure and other flexible element, or the use of rubber or a
cutting tools elastomer toughening phenolic resin in order to improve impact resistance. For example nonylphenol, cashew nut shell oil, linseed oil and so on modified phenolic resin, modified relatively large amount of
polycrystalline diamond , high cost, toughening effect is not obvious; nitrile rubber or polyurethane liquid phenolic resin toughening, and achieved good results, the modified the phenolic resin as a binder have improved
cutting tools , but the preparation process is complicated and the cost is high. compared with the liquid nitrile rubber, acrylic rubber of micro-nano-fine powder of acrylic rubber vulcanization, the average particle diameter 100.
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