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How to Reverse a Cosmas Keyed Entry Door Lever (50 & 80 Series)
Step-by-step instructions to flip the handing on a Cosmas keyed entry lever, including the Cosmas 50 Series and Cosmas 80 Series. (Symmetrical Cosmas levers don’t require reversing.)
Before You Start
Identify your lever. These steps apply to Cosmas keyed entry levers that are handed (e.g., 50/80 Series). Symmetrical designs don’t need to be reversed.
Safety First: Work on an open, stationary door. Keep track of small parts. Protect finished surfaces with a towel or painter’s tape.
Tools & Supplies
- Flat-head screwdriver (or the included Cosmas release tool)
- Phillips screwdriver
- Optional: tape measure, pencil
Instructions: Reverse a Cosmas Keyed Entry Door Lever
1) Unpack the Cosmas door lever
2) Remove old hardware (if needed)
3) Insert and install the latch
4) Install the lever set (don’t worry about up/down yet)
5) Set the lock button to 45°
6) Release and remove the exterior lever
7) Remove the interior lever
8) Swap sides and snap into place
9) Install the strike plate
Time: ~10–15 minutes • Difficulty: Easy • Applies to: Cosmas handed keyed entry levers (e.g., 50/80 Series)
Troubleshooting & Pro Tips
- Lever won’t release: Verify the lock button is at ~45°. Fully depressed tabs release the lever.
- Lever upside down after swap: Remove and re-seat; confirm keyed cylinder stayed on the exterior.
- Latch won’t catch strike: Adjust strike plate position; ensure latch bevel faces the strike side.
- Loose set: Snug the mounting screws from step 4; don’t overtighten into hollow cores.
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FAQ
Do all Cosmas levers need reversing? No—many are symmetrical and work on either handing without adjustment.
Can I reverse a privacy or passage lever the same way? The release process is similar, but these sets don’t have keyed cylinders. Follow the included instructions for your function.
How do I know my door handing? Stand outside the room; if the hinges are on the right, it’s a right-hand door (and vice versa).
