Dormakaba Hardware EE1021M26D41 Simplex Cylindrical Double-Sided Knob Lock

No. The EE1000 Series Simplex is fully mechanical pushbutton access control, with no wiring and no batteries to change. The catalog spec confirms it as non-battery operated and non-electronic, so there is nothing to power, no low-battery failures, and no panel to tie into. That is the main reason facilities standardize on it for remote gates, IT closets, and storage rooms where pulling power is not practical.

It drops into a standard 2-1/8 inch cross bore, which is the normal cylindrical lock prep, and the latch is adjustable so it covers both the 2-3/8 inch and 2-3/4 inch backsets. Both a standard strike plate and an ASA strike plate are covered. If your door already carries a cylindrical knob lock, the bore and backset will almost always line up without new drilling.

Yes, that is the point of the double-sided version. This entry/egress lockset controls access by combination on both sides of the door, and each side takes its own independent code. It suits an opening where you want one code for staff coming in from outside and a separate one for getting back out of a secured space.

It does. Entry is by combination or key override, and the lock is prepared for Medeco and Yale cores. Two keys are included. If your building is keyed in a different system, this is the detail to check first, because the core prep is specific.

It carries a 3-hour UL/ULC fire rating for an A labeled door, so it is acceptable on rated stair and corridor openings where an A label applies. Confirm the door's own label matches the rating you need for the opening.

Pick the Simplex EE1000 when you want code access with no power, no batteries, and no software, and you are happy managing a single code per side that gets changed by hand. Go electronic when you need multiple user codes or an audit trail: the Alarm Lock Trilogy T2 DL2700 is a Grade 1 standalone cylindrical lock with a digital keypad and 100 user codes, the Alarm Lock T3 adds audit trail, and the Schlage NDEB ENGAGE is a Grade 1 wireless Bluetooth cylindrical lock for mobile-managed credentials. Those all need batteries; the Simplex does not.

The Lockey 1600 heavy duty mechanical keyless knob lock is the nearest match in operating principle - pushbutton mechanical access with no battery and no wiring, in a knob trim. The Lockey 1600 lists an adjustable backset and fits doors 1-1/8 inch to 2 inch thick, a wider range than the EE1021M26D41, which is built for 1-3/8 inch to 1-3/4 inch doors. The Dormakaba unit differs in that it accepts a key override cylinder prepared for Medeco and Yale cores and takes an independent combination on each side of the door; if you want a pure code-only opening with no cylinder in it, the Lockey is the simpler choice.

The EE1021M26D41 uses knob trim on both sides. For lever trim with keypad entry, the Lockey E985 and Lockey E995 are electronic keypad lever locks that both list a 1-3/8 inch to 1-3/4 inch door thickness range, the same range the Simplex covers, so the door prep envelope lines up. The E985 adds remote control and key override; the E995 is remote control with battery power. For a Grade 1 lever keypad, the TownSteel XCE-2000 is an electronic cylindrical lockset with keypad, Grade 1 heavy duty, listed for 1-3/4 inch to 2 inch doors. Note all three are battery powered, unlike the mechanical Simplex.

For a mechanical keyless knob in the same style, the Lockey 1600 is a heavy duty mechanical keyless knob lock with an adjustable backset, and the Lockey 2830 is a mechanical pushbutton keyless knob lock with an auto-locking passage function. Both list a 1-1/8 to 2 inch door thickness range. The difference from the Simplex EE1021 is the key override and the Medeco/Yale core prep, which matters if you need the opening tied into a keyed master system.

It is a knob on both sides. If the opening has to meet a lever requirement, this is not the part: look at a lever-operated lockset such as the Marks USA 195N Survivor Series passage lever, which is listed as ADA compliant, or a keypad lever like the Lockey E985. For back-of-house and utility doors where a knob is acceptable, the knob version holds up fine.

The EE1021M26D41 is code and key only; it has no reader. For credentials, the Schlage NDEB is a Grade 1 ENGAGE series wireless cylindrical lock using 2.4 GHz Bluetooth Low Energy with storeroom, office, privacy and apartment functions, listed for 1-5/8 inch to 2 inch doors. The TownSteel FCE-2000 is a Grade 1 standalone motorized cylindrical lockset with RFID, classroom function, for 1-3/4 inch doors. The Schlage XE360M is a Grade 1 wireless tubular lock with an offline push button function and a smart mobile reader, also listed at 1-3/4 inch. All three need power and enrollment; the Simplex needs neither.

They overlap on intent but not on power. The BEST 9KZ EZ Series is an electronic keypad cylindrical lock with a key override function, so like the EE1021M26D41 it gives you code entry with a cylinder as backup in a cylindrical chassis. The difference is that the 9KZ is electronic while the EE1021M26D41 is fully mechanical with no wiring or batteries, and the Simplex takes an independent combination on each side of the door rather than keypad on one side.

Correct, the EE1021M26D41 is an entry/egress lockset with combination or key override entry, not a classroom intruder function. For that, the TownSteel XCE-9000 is an electronic classroom intruder cylindrical lockset with keypad, Grade 1 heavy duty, classroom function, listed for 1-3/4 inch to 2 inch doors. The TownSteel FCE-4000 is the RFID version of the same idea - electronic intruder classroom cylindrical lockset, Grade 1 heavy duty, for 1-3/4 inch doors.

Construction is stainless steel and the lock is classified for commercial use, not residential. Combined with the mechanical pushbutton mechanism, that is why it turns up on exterior service doors, mechanical rooms, and multi-family common areas where knobs get hit all day.

It is supplied in satin chrome, the 26D finish called out in the model number. That is the most common commercial finish, so it will sit correctly alongside satin chrome or satin stainless closers, hinges, and exit devices already on the openings.

For doors that only need latching and no access control, the Cal-Royal CAL30 is a Grade 1 extra heavy duty passage lockset in the Calypso series covering 1-3/8 inch to 2 inch doors, and the Orca OCL210 is a Grade 2 medium duty passage cylindrical lockset. For bath and bedroom privacy, the Cal-Royal CAL20 is a Grade 1 extra heavy duty privacy lock for 1-3/8 inch to 2 inch doors and the Orca OCL240 is a Grade 2 medium duty privacy cylindrical lockset. None of these take a code; keep the EE1021M26D41 on the openings where combination entry on both sides matters.