Attach Base and Spring to Hinge

Put the safety glasses on immediately! The Gripper has small parts, including a torsion spring which may be inadvertently released during assembly.

The Base is attached to the Hinge with these parts, in order:

1-1/4″ screw > washer > Nylon spacer > Torsion spring over Spacer > washer > locknut

Once assembled, The torsion spring should apply downward pressure to the Base. 

• PUT ON YOUR SAFETY GLASSES IF YOU HAVE NOT DONE SO ALREADY! 
• Gather the 4-40 1-1/4” panhead screw, (1) Nylon locknut, (2) #4 washers, the 1” long 3/16” diameter Nylon spacer, Base part, and the 90° torsion spring.
• Align the Base holes between the Hinge holes.
• Slide the 1″ Nylon spacer through the first set of Base and Hinge holes.
• Pinch the torsion spring’s ends together and position it between the Base holes.
• Slide the spacer through the torsion spring and the second set of Base and Hinge holes to hold the pieces in place.
• Thread a #4 washer onto the 1-1/4″ panhead screw.
• Thread the screw through the 1″ Nylon spacer.
• Thread the second #4 washer onto the screw, and secure it in place with a Nylon locknut to secure the Base to the Hinge.
• Tighten the screw and locknut, but make sure there’s no binding.

The assembled pieces should look like this:

• PUT ON YOUR SAFETY GLASSES IF YOU HAVE NOT DONE SO ALREADY!
• Using right-angle cutters, snip the torsion spring flush with the top of the Base. To avoid sending the cut spring parts flying through the air, hold the loose end while you cut.

• Cut the other side of the torsion spring flush with the top of the Hinge as shown. Cut this wire as tight to the Hinge and Base as possible.