Attention of processing thread on rebar end

1. The thread diameter, thread shape and pitch, etc. processed on rebar end must be consistent with thread large diameter, thread shape and pitch of rebar coupler. The cumulative length of bald thread within effective threads is less than the 1/2 circumference. Thread is qualified detected by appropriate gauges.

 2. When process thread on rebar end, should use water-soluble cutting lubrication, when the temperature is below 0 degrees, should incorporate into the 15% -20% sodium nitrite. Prohibit using machine oil as cutting lubrication fluid or roll without any fluid.

3. Workers should check the appearance quality of each thread, and mark the operator.

4. Should check the quality of 10% each batch randomly, and no less than 10 pieces.

5. Should cover plastic cap on qualified thread, and classify according to size, and stack neatly.