1, Spacer of mandrel: GL is composed with thicker steel plate and with blackening surface to anti-oxidation so as to keep longer using life. The coil keeper is more stronger with casting steel.
2, The concentricity of axis of GL is processed with very high precision, so as to protect the motor when uncoiling.
3, Adjustment of GL is worm and gear to adjust the gap between upper and down straightener rollers. In this way, the adjustment is much more easier to operated with high precision. While GO is adjusted by worm wheel.
4, The transmission way of GL is doule chain.
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