1. Locksets Door Hardware For Sale
  2. sku: 16198318004183722
  3. LOCK 1571-26D

U.S. LOCK 1571-26D Mortise Cylinder 1-1/8 320

1571-26d U.s. Lock Mortise Cylinder 1-1/8 99 320

( Brand: U.s. Lock ), ( Manufacturer Part Number: 1571-26D ), ( Part Type: Cylinder ), ( Country Of Origin: Mexico )

Review U.S. LOCK Us.s. Mortise Cylinder 1-1/8320

The **U.S. Lock 1571-26D Mortise Cylinder** is a high-performance, commercial-grade security solution designed to deliver exceptional protection for both residential and light-commercial applications. Engineered with precision, this **1-1/8" (1.25") diameter** mortise cylinder features a **320-degree keyway**, ensuring smooth and reliable operation even after extensive use. The robust construction incorporates a **durable brass or steel core**, reinforced with hardened steel pins and a high-security keyway to thwart picking, drilling, and other common tampering attempts. This cylinder is specifically crafted for use in **mortise locks**, making it an ideal choice for doors requiring enhanced security without compromising on aesthetics or functionality. Its **sleek, low-profile design** integrates seamlessly into standard mortise lock mechanisms, providing a clean and professional finish. The **26D keyway** is compatible with a wide range of U.S. Lock keys, offering flexibility for key duplication and system-wide security management. Whether installed in a home entry door, a small business office, or a rental property, the 1571-26D delivers dependable performance and peace of mind, backed by the trusted reputation of U.S. Lock a brand synonymous with durability and innovation in the security industry.

The **US Lock 1571-26D** is a mortise cylinder lock commonly used in commercial and institutional settings, particularly for doors requiring high security and durability. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the US Lock 1571-26D**

1. **High Security Features**

The 1571-26D is designed with a **320-pin configuration**, which provides a high level of security against picking, bumping, and drilling. The mortise cylinder is more secure than surface-mounted cylinders because the keyway is recessed within the door, making it harder to manipulate.

2. **Durability and Longevity**

This lock is built for heavy-duty use, making it suitable for commercial, institutional, or high-traffic residential applications. The mortise construction resists wear better than surface-mounted locks, especially in environments where doors are frequently opened and closed.

3. **Compatibility with Mortise Locksets**

It is designed to work seamlessly with mortise locksets, allowing for a clean, flush installation that enhances the aesthetic of the door. This is particularly useful in settings where appearance matters, such as offices, schools, or hotels.

4. **Key Control and Customization**

The lock supports **keyway customization**, meaning you can order keys with specific configurations to prevent unauthorized duplication. This is useful for organizations that need strict key control, such as schools, government buildings, or corporate offices.

5. **Resistance to Tampering**

The mortise cylinder is less exposed than surface-mounted locks, reducing the risk of physical tampering (e.g., drilling or picking attempts). The deep-set keyway also makes it harder for intruders to bypass the lock with tools.

6. **Wide Keyway Compatibility**

The 1-1/8" keyway is standard for many commercial locks, meaning you can easily replace or upgrade components without changing the entire lockset. This flexibility is beneficial for maintenance and future-proofing.

7. **Good for High-Security Applications**

If you need a lock that meets **ANSI Grade 1 or 2 standards** (or equivalent commercial security ratings), this cylinder is a solid choice. It is often used in applications where security is a priority, such as server rooms, vaults, or secure storage areas.

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### **Cons of the US Lock 1571-26D**

1. **Complex Installation**

Mortise locks require **carpentry work** to create a mortise (a recessed slot) in the door, which is more labor-intensive than installing a surface-mounted lock. This may require professional help, increasing installation costs.

2. **Higher Cost Compared to Surface-Mounted Locks**

Due to its construction and security features, the 1571-26D is more expensive than standard pin-tumbler cylinders. The entire mortise lockset (including the latch and strike plate) will also be pricier than a basic surface-mounted lock.

3. **Limited DIY Repairability**

If the cylinder fails, replacing it may require re-mortising the door or using an adapter, which can be difficult for untrained individuals. Some mortise locks are not as easily serviced as surface-mounted ones.

4. **Not Ideal for Light-Duty Use**

If you only need a lock for a residential door with minimal security concerns, a mortise cylinder may be **overkill**. A simpler **deadbolt or surface-mounted lock** would suffice and be more cost-effective.

5. **Key Duplication Can Be Expensive**

Since this is a high-security cylinder, key duplication may require a **locksmith** or a specialized key blank, adding to maintenance costs.

6. **Potential for Misalignment Over Time**

If the door frame or hinges wear out, the mortise lock may not align properly, leading to sticking or difficulty in operation. This can require adjustments to the door or lockset.

7. **Not All Doors Are Compatible**

Not all doors are suitable for mortise locks. Thin or softwood doors may not hold up well to the installation process, and some older doors may lack the structural integrity needed for a mortise lockset.

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### **Conclusion**

The **US Lock 1571-26D** is an excellent choice if you need a **high-security, durable mortise cylinder** for commercial, institutional, or high-traffic applications. Its 320-pin configuration, resistance to tampering, and compatibility with mortise locksets make it a strong security option. However, its **higher cost, complex installation, and limited DIY repairability** may not justify its use for low-security residential doors or light-duty applications.

If your primary concern is **security in a commercial or institutional setting**, this lock is a reliable and robust solution. If you are working with a **budget constraint or need a simpler installation**, a surface-mounted high-security cylinder or a deadbolt may be more practical.

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### **Recommendation**

- **Buy the US Lock 1571-26D if:**

- You are installing it in a **commercial, institutional, or high-security residential application** (e.g., schools, offices, secure storage).

- You need a **long-lasting, tamper-resistant lock** that can withstand frequent use.

- You are already using a **mortise lockset** and need a compatible cylinder.

- Security is a **top priority**, and you are willing to invest in a high-end solution.

- **Avoid the US Lock 1571-26D if:**

- You are on a **tight budget** and can opt for a simpler, less expensive lock.

- You are a **DIY enthusiast** who prefers easy installation and maintenance.

- Your application is **low-security** (e.g., a standard residential door with minimal risk).

- The door **cannot structurally support a mortise lock** (e.g., thin or poorly constructed doors).

For most **commercial or high-security needs**, the 1571-26D is a **strong recommendation**. For residential or low-security use, consider alternatives like **Schlage or Kwikset high-security cylinders** or **electronic locks** if smart features are desired. Always ensure proper installation by a professional to maximize security and longevity.

Details:

With its durable construction and reliable performance, this mortise cylinder is an essential component for ensuring the safety of your property. The USA Lock 1571-26D Mortise Cylinder is a high-quality door Lock manufactured by in Mexico.

part #: 157126d price

  • $5000.00

specifications locsedoo:

  • brand: U.s. Lock
  • mpn: 1571-26d
  • part type: Cylinder
  • country of origin: Mexico

shipping locsedoo:

  • service: USPS Priority Mail
  • transit: 4-8 Days
  • cost: $0.00
  • carrier: USPS
  • class: Expedited
  • type: Fixed

seller locsedoo:

  • city: Buda, Texas
  • # reviews: 2895
  • rating: 99.8%

returns locsedoo:

  • method: Money back
  • time: 30 Days
  • paid by: Seller
  • policy: Returns Accepted

general locsedoo:

  • Building Hardware > doors Door Hardware > Door Locks Lock Mechanisms
  • condition: New

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  • credit card: Mastercard

offer locsedoo:

  • sold: 0
  • availability: In Stock
  • started: June 9, 2026
  • options: Ship-to-home
  • quantity: 1
part type: cylinder, country of origin: mexico,
category: home & garden > building hardware > doors door hardware > door locks lock mechanisms, sku: 16198318004183722,
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1 offer $5000.00 USD
  • New. Offer #1 priced at $5000.00 + $0.00 shipping estimate = $5000.00* total. With its durable construction and reliable performance, this mortise cylinder is an essential component for ensuring the safety of your property. The U.S.FREE SHIPPING

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