How Do You Take Apart A Commercial Door Lock?

  • Alistair Seth
  • November 19, 2022

The other day, I had been in the process of preparing an office space to allow a tenant to move into at the beginning of the month. Since we were splitting the room, I needed to replace two doorway levers (they are no longer knobs for doors) with latches that have keys and locks. Also, I needed to replace an old lever that was on the back of the apartment. I recently bought three locksets from Locksmith Toronto. There aren't a lot of industrial door locks in Lowes and Home Depot. The backset, or size, differs between levers for residential and commercial use.
For the remainder of this site, I'm going to refer to these levers for doors that lock as a latch. It's a simple method and you are aware of what I am talking about.

Process Of Replacing The Door Latch On Your Commercial Business

I'll explain the process of replacing the door latch on your commercial business with a brand-new one. I will not discuss drilling doors or measuring the hardware for a new one or any other installation that is not standard. Why I'm discussing this is that instructions for any item you purchase that requires assembly are typically terrible. Sometimes, they are the tiny sheet that has exploded diagrams and vague descriptions. Some pages are as thick as 80 with 18 languages, and others are so precise that it is impossible to follow the directions. And, of course, there's IKEA where you can get a stick-figure character that has funny thought bubbles, but no words.

So, let's get started.

  • The box is opened and has the lock that was changed. Then, take the contents out and set them on the cart or table. The lock typically comes assembled. When you take it apart take note of which side is the lock, or the hole to fit a cylinder for the lock. Assemble the pieces and, if you have space, lay the pieces across from left to right in the order in which you will be taking them apart. The majority of keyed latches have the cylinder removed from the latch. To make it clear the screw heads are in the middle or on the non-keyed side of the handle latch. It is essential to be aware of this.
  • Detach the latch. Begin from the inside or from the non-keyed side. There is a tiny hole in the area where the handle is located. door. The new latch comes with a tool that has one small, pointed end. This tool will go through the hole and release a spring-loaded clip that allows you to remove the handle from the main component of the cylinder.
  • If the poke tool that came with the new latch isn't quite long enough to allow the catch to be released it is possible to use an extremely strong toothpick (what I employed) or the wire's end coat hanger.
  • The cover's decorative design is known as the rose. You can grab the rose just as you would grab the lid of a jar of pickles. Then turn it clockwise for around a half-inch or so (anti-clockwise for those who drive on the incorrect side.) The rose should be removed with a straight pull to you.
  • The rose's insert is located underneath. (I said there are many names that are not clear for these components.) There are two screws that hold the rose insert onto the support plate inside. The support plate inside is made of metal, which appears like the shape of a throwing star. It also has two screws. Take them off. They are quite long, and a cordless screwdriver is handy when you need to remove them.
  • After these two screws have been removed after which the remainder of the piece should disappear from it on its opposite side.
  • Replace and remove the latch bolt. It is the portion that is extended into the doorjamb to keep the door locked and shut. It is secured by two screws inserted into the side of the slab. It is often the most difficult component because it could have been stripped and loose or rusted. Or,  Break in Lock Repairs Toronto did shoddy work using it. Replace it with the latest one. The screws are strange in appearance. The threaded end is shaped like a wooden screw, while the head can be machine threaded. Make sure to screw the new screw with care. Make sure you don't remove the mounting bracket made of metal or wood. bracket.
  • Place the circular housing (the largest piece) into the hole that is in the door. The housing has slots on one of the sides of the house. The slot is aligned with the flared side of the latch bolt. It is placed through the outer (the side that has keys.) The support plate that is outside (remember the throw star piece?) and attached to the cylindrical assembly. This plate might be fitted with two prongs. They'll be placed against the door and into two tiny holes. Make sure you don't screw too much. To begin, ensure that not more than an inch of threads visible comes out of the cylinder. It's possible to screw it into the plate should you require tightening up the fitting.
  • Install the outer rose insert on top of the plate that supports it. It is a large circular piece of metal that has two shafts with threads. Two shafts run into the door. They are usually oriented between 12 o'clock and 6 o'clock.
  • This is the place where you'll think you could use three hands. On the opposite part of the doors (usually inside) you can place the inside support plate on top of the lever sleeves (handle shaft) and connect the holes to threaded shafts coming from the outside of the rose insert. Find two screws (these are known as through bolts) and place them through the holes of each shaft that is threaded. Secure the screws with a tight fit and ensure that the cylinder shaft twists freely. The latch bolt should move when you turn the shaft of the cylinder. Now tighten, but be careful to not overtighten these screws.
  • The inside rose insert ought to contain two holes that coincide in two threaded holes on the support plate inside. Choose two screws to attach this insert to the supporting plate. They are typically short.
  • The lever on the inside (the handle) over the sleeve of the lever and push it several times to make sure there is nothing restricting.
  • Install the lever on the outside and the key for the cylinder. This was the most challenging component for me. It was at first that I couldn't figure out what was going on when the key cylinder got separated from the rest of the assembly. It was discovered that you need be able to properly assemble it for the lever to be placed over the lever sleeves.
  • The outer rose should be placed over the insert. You'll need to align the small indentation with the grooves of the insert. Then, twist in a slight clockwise direction. This will keep the trim in place.
  • The key must be removed from the cylinder.
  • If you take a look at the lockset in the same way as you would look through the keyhole, there is a tiny slotted hole in the middle of the housing. A small piece of metal, referred to as the tailpiece, allows the lock cylinder to the latch using the housing of the cylinder. It has to be in line. My latches required one with a 90-degree twist, and I needed to switch it out with a straight latch.
  • The lock cylinder slides into the lever sleeve, and the tailpiece will slide through the slots.
  • This is where the magic occurs. Then, push the lock cylinder through the lever on the outside (you might need to take off one tiny piece of trim.) Place it inside the lever until you can insert the key again.
  • Move the lever using the lock cylinder mounted on the sleeve of the lever until the lever stops. Then, turn the key around 90 degrees as if you're opening the door. The lever should slide the remainder of the way through and you're now completed.
  • The trick was turning the key would allow the clip with spring loaded to lock into position. If you need to take the lever off then you must turn the key prior to inserting your poke tool into the tiny release hole.

To Summarize:

  • Unlock the box and set the new lock on a flat surface in the order from left to right
  • Remove the latch that is currently in place.
  • Take out the old one and replace it with a new latch bolt
  • Place the cylindrical new housing in the door's hole.
  • Place the rose insert on the outside over the plate that supports it.
  • Place the support plate onto the lever sleeve, then screw it into the position
  • Attach an inside-facing rose insert to the outside support plate by using two small screws.
  • Slide the lever on the inside of the sleeve of the lever and press it into the position
  • Install the outside lever by placing the key cylinder positioned over the sleeve that holds the lever, and then push it in place

At first, this procedure appears to be somewhat daunting, however, If you take the time to read the exploded diagram and then compare the actual hardware you'll see that it's actually not something that is difficult to do. Have fun!