If pulley keyway length is less than this length, rework long key by removing one-half of excess length between pulley and end of key to maintain balance.

• 如果滑轮键槽的长度短于键长的一半，为保持运转平衡，可通过加工缩短此键，除去的距离为键端超出滑轮键槽端长度的一半。