These linear scales are specially made to be compatible with the Polar Guillotines.
The linear scales must be installed by a good guillotine engineer who is capable of some fitting skills.
There are some differences from the original equipment - a adaptor cable is provided to connect the linear scale to the Polar PCB and a reader bracket to suit the linear scale is also provided.
There is a single reference mark to suit the polar machines - after installing a new linear scale the DIP switches on the pcb will need resetting to suit the new reference point.
I have installed these linear scales on guillotines in many locations across the country.