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40% OFF Flexible Shaft Coupling OD18mmx25mm CNC Stepper Motor Coupler Connector 6.35 To 8mm ₹513.00 ₹855.57 View It

Overall:

Divingboard 03/10/2016

Received in good order and fast. The couplings fit well. (I ordered 3; they come per piece.) There is however a disadvantage: the coupling elongate under tension, especially when milling deep. The elongation can be as much as 1 mm, depending on the mechanical resistance and doesn't always relax, depending on depth-of-cut and material.. This problem of course doesnot happen when engraving with a laser (no mechanical resistance). Thus: a good product, depending on the application. (I am thinking about placing thin rubber sheets in the grooves and drilling the center away. But, I have not tried that yet. Installing under pre-tension does help, but limits the side-movement.)

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