Standard mortise locks

Standard mortise lock - variety and security for every application

As a security professional, you know that a standard mortise lock is at the heart of every door security system in the private and commercial sector. In order to select the right lock for your requirements, an overview of the available designs and their security-relevant features is essential. In our range, you will find a wide selection of standard mortise locks from leading brands, perfectly tailored to your projects.

• Room door mortise lock

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  Object lock

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  Whisper latch lock

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  Latch bolt lock

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  Bathroom WC lock

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  Colored beard lock

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  DIN-TGL mortise lock

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  Front door lock

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  Inclined faceplate lock

What is a standard mortise lock?

A standard mortise lock is a universally applicable mortise lock in accordance with DIN 18251 for various door types, which is inserted into the door rebate. Relevant criteria such as backset (30-80 mm), distance (72-92 mm) and faceplate dimensions determine compatibility with standard door profiles made of timber, PVC and steel. The solid construction ensures stability and protection against the effects of force. Various faceplate shapes - round or square, length usually from 180 to 235 mm, faceplate width typically 18-24 mm - ensure maximum flexibility during installation.

Variants and security features

Mortice door lock

Standard solution for interior doors. Sturdy workmanship (body usually galvanized, forend stainless steel), easy to handle. Available with punched or profile cylinder holes.

Contract lock

For contract doors with increased security requirements. Robust mechanism, reinforced bolts, often with additional panic function (EN 179/EN 1125). Ideal for public areas.

Whisper latch lock

Noise-reduced closing thanks to special plastic or Teflon inserts on the latch. Particularly suitable for office or hotel areas.

Latch bolt lock

With double latch for additional door security even when closed. Increases burglary protection thanks to additional tumblers.

Bathroom WC lock

Integrated emergency and release function. Enables the door to be opened from the outside in an emergency. Suitable for bathroom and WC doors.

Buntbart lock

Classic use for living areas and side doors. Compatible with standard buntbart keys. Cost-efficient solution for moderate protection requirements.

DIN-TGL mortise lock

Special design in accordance with GDR standard (TGL). Custom-fit replacement solution for doors in old buildings in East Germany.

Front door lock

For entrance doors with increased security and load requirements: reinforced bolts (often made of steel, 20 mm exclusion), high corrosion resistance, often multi-point locking.

Angled faceplate lock

For obtuse doors or door hinges at unusual angles (inclined position 10-20°). Facilitates installation in special installation situations.

Our brands for standard mortise locks

We offer a comprehensive selection of renowned manufacturers - including BEVER, BKS, BMH, CES, ISEO, KFV, SCHNEGEL, SSF and WILKA. Each of these brands stands for consistent quality, tested security and sophisticated functionality. Whether precision in the locking mechanism, optimum ease of movement or special features such as anti-picking or anti-drill protection - our branded products meet the highest requirements.

Frequently asked questions about standard mortise locks

1. What criteria should be considered when selecting a standard mortise lock for different door types?

When selecting a standard mortise lock, regardless of whether it is a room door mortise lock, property lock, front door lock or one of the other sub-categories, there are several technical features to consider.

The most important criteria include

• Backset (e.g. 55 mm, 60 mm): Distance from the faceplate edge to the center hole of the follower or keyway. It must match the door leaf and fitting.
• Distance (e.g. 72 mm, 92 mm): Distance between the center of the follower and the center of the keyhole
• Faceplate shape and size: square or round, length and width according to the door rebate and installation instructions.
• Left/right version: Matching the DIN direction of the door.
• Type of use: Whether standard, bathroom/WC, contract or special lock (e.g. angled faceplate).
• Compatibility with the desired locking system (profile cylinder, non-ferrous bit, etc.).
• Material and corrosion protection: For damp rooms, external doors or special requirements.

Manufacturers such as BKS, WILKA or ISEO offer suitable variants for every door situation, often with specific security functions such as reinforced deadbolt, panic function or whisper latch.

2. What are the key security features of an object lock compared to a conventional standard mortise lock?

Project locks are specially designed for buildings with increased public traffic and security requirements - such as schools, office buildings or public facilities. Compared to room door mortise locks, they have:

• Reinforced deadbolts and latches: Solid design (often steel, 20 mm exclusion) to resist tampering and force.
• Panic function (EN 179, EN 1125): Door can be opened from the inside at any time, even when locked - important for escape and rescue routes.
• High fatigue strength: For high closing cycles (often tested for 200,000 cycles and more).
• Extended compatibility: Suitable for modern access control systems or electronic locking cylinders.
• Standard-compliant designs: In accordance with DIN 18251, for standardized doors.

Brands such as KFV, BMH or CES offer quality project locks with extensive certification and tested durability.

3. When does it make sense to use a whisper latch lock and what advantages does this type of lock offer?

Whisper latch locks are particularly popular in environments where the door needs to close quietly - for example in hotels, clinics, office buildings or high-quality residential complexes. The advantages are:

• Reduced noise: special plastic or Teflon coatings on the latch significantly dampen the closing noise.
• Increased comfort: No annoying banging, ideal for work or quiet areas.
• Same security standards: Despite additional insulation, the standard mortise lock meets all security requirements.
• Universal compatibility: Available for many door shapes and backset dimensions, e.g. also with bathroom WC or profile cylinder perforations.

Manufacturers such as SCHNEGEL, BKS and SSF offer special whisper latch locks that are compatible with existing systems and enable simple retrofitting.

4. Are there standard mortise locks that are especially suitable for replacement in older (GDR) door systems?

Yes, so-called DIN-TGL mortise locks are designed precisely for this purpose. These locks follow the GDR standard TGL 197-6333 and have different dimensions to the current DIN standards, particularly with regard to backset, distance or faceplate dimensions. Typical features:

• Precisely fitting spare parts: Preserve the historic door appearance, but allow defective locks to be replaced without any adjustments to the door.
• Modern security technology: Use of current locking cylinders (profile cylinder system) possible.
• Large variety of models: For apartment doors, front doors or side entrance doors in old buildings.

Brands such as BEVER, WILKA or KFV have these niche products in their portfolio - some of which are available from stock at short notice.

5. What distinguishes the standard mortise lock brands you offer in terms of quality and reliability?

We only stock standard mortise locks from renowned, internationally recognized brands: BEVER, BKS, BMH, CES, ISEO, KFV, SCHNEGEL, SSF and WILKA. Common quality factors are:

• Certified production standards: DIN 18251 and other quality seals, some VdS-tested.
• Resistant materials: Corrosion resistance, high-quality steels or alloyed materials.
• Innovative technology: Features such as anti-drill protection, break-open protection, reinforced bolts, whisper functions or panic design.
• Wide range depth: Specific solutions for every sub-category - from mortise door locks to angled faceplate locks.
• Durability: Developed for heavy-duty use and frequent use.

Thanks to our manufacturer-independent advice, you will find an optimally suitable, reliable standard mortise lock for every application - even for complex property requirements.

6. What is a standard mortise lock and for which applications is it suitable?

A standard mortise lock is a universally applicable lock that is inserted into the door leaf in accordance with DIN 18251. It is suitable for various applications, including interior doors (room door mortise lock), commercial doors, house entrance doors, bathrooms (bathroom/WC lock) and special applications such as angled faceplate or DIN-TGL doors. Thanks to the wide range of variants, security professionals can choose a suitable solution for every door type to meet the different requirements in terms of security, locking convenience and design.

7. What are the differences between a contract lock and a room door mortise lock?

A contract lock is designed for high-traffic areas in commercial or public buildings. It is characterized by reinforced mechanics, higher fatigue strength and often a panic function (e.g. EN 179/1125). Room door mortise locks, on the other hand, are designed for less stress, are suitable for residential use and usually have no special functions such as panic or permanent deadbolt protection.

8. What are the advantages of a whisper latch lock?

Whisper latch locks are equipped with particularly quiet latches, usually made of plastic or Teflon. They reduce the closing noise to a minimum. This design is ideal for office buildings, hotels, schools and residential areas where noise comfort is important. Despite their quiet operation, whisper latch locks offer the full security of a standard mortise lock and are often available as a retrofit solution.

9. What is a deadbolt lock and when is it used?

A locking latch lock has an additional, second latch (locking latch or double latch), which locks the door even when it is closed. This makes it more difficult to pry or force the door open. Latch locks are mainly used for increased security requirements and for side entrance doors and property doors.

10. What features should a bathroom toilet lock have and why are special functions such as emergency and release functions important?

A bathroom toilet lock has an emergency and free function: In an emergency, it can be unlocked from the outside without having to destroy the locking cylinder. This is particularly relevant in public buildings and in households with children or elderly people to ensure that help can be provided quickly. Bathroom-toilet locks also differ in terms of the hole spacing and a rotary knob option for the inside of the door.

11. When is a buntbart lock recommended and where is it used?

Buntbart locks are classic standard mortise locks for interior doors in living areas, storage rooms or cellars. They are operated with a buntbart key, but only offer a low level of protection against break-ins. They score points for cost efficiency and are useful wherever a low level of theft protection is sufficient.

12. What makes the DIN-TGL mortise lock special and for which properties is it suitable?

DIN-TGL mortise locks comply with the GDR standard TGL 197-6333 and are primarily required for replacement in old East German buildings where other standard mortise locks do not fit due to deviating dimensions. This means that the original door appearance is retained, while at the same time it is possible to switch to modern security standards (e.g. use of profile cylinders).

13. What should I look out for in a front door lock?

A front door lock must be able to withstand increased mechanical stress, have a robust locking mechanism and ideally be equipped with additional security features such as a steel bolt (often 20 mm extension), anti-drill protection or multi-point locking. It should be resistant to weather influences and match the door profile and hardware system.

14. Which applications require the use of an angled faceplate lock?

Angled faceplate locks are required if the faceplate is not vertical but runs at a certain angle (e.g. 10°-20°) to the door. This is the case with obtuse doors or special constructions. They enable the door to be closed properly even in special installation situations.

15. Which brands offer high-quality standard mortise locks and what advantages do these manufacturers offer?

Renowned manufacturers such as BEVER, BKS, BMH, CES, ISEO, KFV, SCHNEGEL, SSF and WILKA offer a wide range of standard mortise locks. Their products impress with certified security, durable function, a wide range of models and technical innovation (e.g. whisper latch, panic function, anti-drill protection). This means that projects with a wide variety of requirements can be realized with a perfect fit.

16. Which dimensions are decisive when selecting a standard mortise lock?

Important dimensions are the backset (distance from faceplate edge to follower hole, e.g. 55 mm), the distance (center distance from follower to key or cylinder hole, usually 72 or 92 mm), faceplate dimension (width and shape) and the door leaf thickness. These dimensions ensure that the lock can be selected and installed with a perfect fit.

17. How can I evaluate different standard mortise locks in terms of security?

The security assessment is based on certifications (e.g. DIN 18251, EN 179/1125), materials used (steel, hardened elements), additional functions (panic, locking latch, anti-drill protection) and compatibility with modern locking systems (profile cylinder with VdS certificate). Property locks and front door locks have particularly high standards compared to room doors.

18. Can standard mortise locks be retrofitted, e.g. from Buntbart to profile cylinder?

Yes, many room door mortise locks and also some DIN-TGL models are available in versions with keyway and profile cylinder holes. Replacing them allows you to upgrade to modern locking technology with higher burglary protection, especially if you plan to change to a current security cylinder.

19. How quickly are standard mortise locks available from you as a specialist retailer?

As a specialist retailer with a large stock, we stock a large number of the most common variants and brands. Most standard mortise locks are ready for immediate delivery and can usually be dispatched within 24 to 48 hours. On request, we can support you with personal advice on selection and procurement.

20. What advice and services do you offer for selecting the right standard mortise lock?

We offer cross-manufacturer, expert advice: from needs analysis and technical coordination (dimensions, DIN direction, function) to the selection of special lock types for demanding projects. Thanks to our wide range of products, fast delivery and support for complex installation situations, we offer an all-round carefree package for security professionals and specialist companies.

Buy a standard mortise lock - your advantages with us

As a specialist retailer for door security systems, we combine a large selection, fast delivery and technical consulting expertise. Benefit from:

• Cross-manufacturer advice: we help you to select the right standard mortise lock for your project and application.
• Large stock program: Numerous lock variants available from stock at short notice, fast delivery - usually within 24-48 hours.
• Brand diversity: A suitable lock for almost every door profile and every requirement profile, all from a single source.

Rely on tested quality and individual advice. Choose the right standard mortise lock for your property or project now - and rely on our experience and expertise.