ER11:
1. Install the ER11 into the ER11 extension rod holder.
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2. Install the ER11 extension rod holder into the motor. Generally, it's a little difficult to install.
Installation: The aperture is smaller than the actual 0.02mm. According to the high-frequency heating (300 degrees
Celsius), thermal expansion and contraction principle, to expand the hole, then insert the spindle and lock it, and then
fix the shaft collet after cooling completely.
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