What is the main structural difference between a cylindrical and mortise lockset?
A cylindrical lockset mounts through two bored holes in the door (a cross-bore and an edge-bore), with the lock chassis seated in the cross-bore. A mortise lockset mounts inside a rectangular pocket cut into the door edge, with a self-contained steel lock body that houses the entire latch and deadbolt mechanism.
Is a mortise lock more secure than a cylindrical lock?
At the same ANSI grade level, a mortise lock body provides greater mechanical resistance to forced entry due to its heavier steel construction and integrated deadbolt. However, both types are available in Grade 1 configurations that meet institutional security requirements. The specification should match the lock type to the threat level and traffic volume of the opening.
Can I replace a cylindrical lockset with a mortise lockset on an existing door?
Converting from cylindrical to mortise requires cutting a mortise pocket into the door edge and filling the existing cross-bore. This is feasible on solid-core wood doors but may not be practical on hollow metal doors. It is generally more cost-effective to replace the entire door if a mortise lock is required on an opening originally prepped for cylindrical hardware.
What ANSI grade should I specify for a commercial classroom door?
Most jurisdictions and school districts require ANSI/BHMA Grade 1 locksets with classroom function (F05) for classroom doors. Grade 1 provides durability and the strength ratings necessary for institutional use. Classroom function allows key-operated locking from the corridor side while maintaining free egress from the interior.
Does CDF supply both cylindrical and mortise locksets?
Yes. CDF Distributors supplies cylindrical and mortise locksets from Accentra (Formerly Yale), Corbin Russwin, Harger, Sargent , Schlage, and many other brands. Both lockset types can be configured in CDF's ProBuilder tool as part of a complete door, frame, and hardware assembly.
What lock function should I use for a storeroom door?
Storeroom function (F07) is the standard specification for storage rooms, electrical rooms, and other restricted-access openings. The exterior lever is always locked and requires a key for entry. The interior lever is always free for egress. This function is available in both cylindrical and mortise configurations.