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NPC Actuator

Under construction Will be adding photos on how I took 2-1/2" of stroke out of the NPC A661 linear actuator.

The first thing is to loosen the ring shown on the left side.  It only has two indentions to get it loose.  I used a drill bit and a vise-grip to get it loosened up.  Then I screwed out the actuator cover tube.  Will see if I have some pics showing the removal, doubtful though.

Here, the bearing and gear assembly is popped out.

Next, the nut is removed and then the gear and bearing can be removed.

The bottom stop pin is removed, and the actuator screw can then be turned out through the housing.

I will need to find a couple more pictures that may show the in between steps to the last step. Here, I cut off the outer end by 2-1/2" and had to re-drill the outer end stop pin hole and the the cap hole. CAUTION:  You need to grind off some of the carbon hardening of the screw to start the holes AND also the exit area.  (My drill bit made a nice screaming sound when trying to complete its job)

Note to self:  Locate more pics for this process

The next step is to cut down the outer tube and the acutuator screw housing the same amount you took out of the screw.  NOTE:  Clean and de-burr the cut surfaces before re-assembling. As shown above, you put the outer pin and cap on before turning the screw back down into the actuator housing.  After this, replace the lower pin and the bearing/gear/nut and then re-assemble back onto the actuator gear housing.