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
|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.