Sargent 8255 Office Entry Func...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,437.00
$773.77
Sargent Sargent 8200 Series - (8255) Office or Entry Function Rose Trim, Heavy Duty Single Cylinder Mortise Lock, Grade 1 SGT-8255

Sargent 8255 Office Entry Function Heavy Duty Grade 1 Mortise Lock with EcoFlex Technology

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Model: 8255 LNA 10BE
From the 8200 Series Collection
$1,437.00
$773.77
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,437.00
$773.77
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Sargent 8255 Grade 1 Heavy Duty Mortise Lock with EcoFlex Technology

Industry Benchmark Mortise Lock with Maximum Security and Performance

The Sargent 8255 represents the industry benchmark for mortise locks, delivering maximum security, performance, and durability through high-quality components and patented design. This Grade 1 heavy duty mortise lock features a 2 3/4" backset, 3/4" latchbolt throw, and field reversible handing for 1 3/4" door thickness applications. The electromechanical version operates from 12 to 24VDC with revolutionary EcoFlex technology that reduces power consumption up to 96%, while UL testing verification shows exceptional durability at 16 million cycles.

Professional Features & Benefits

  • Door Specifications: Designed for 1 3/4" door thickness with standard 2 3/4" backset and 3/4" latchbolt throw for reliable latching performance.
  • Ultra-High Cycle Rating: UL Cycle Above and Beyond test completed at 16 million cycles (Verification ID: V584148) for exceptional long-term reliability in high-traffic commercial applications.
  • Flexible Power Options: 12 to 24VDC operation with revolutionary EcoFlex technology that reduces power consumption up to 96% while maintaining full operational capability.
  • Heavy-Duty Construction: Patented design and construction with robust components engineered to far exceed independently verified testing standards.
  • Universal Key System Integration: Integrates seamlessly with all SARGENT key systems including Degree, Signature, KESO, and XC for comprehensive access control flexibility.
  • Multi-Functional Design: Available in 56 different functions including electromechanical, security and monitoring options with on-site function switching capability.
  • Comprehensive Fire Rating: UL 10C Fire-Rated up to 3 hours with positive pressure certification for critical fire safety applications.
  • Manufacturer Warranty: 10-year limited warranty on mechanical components with 2-year coverage on electrical components for added confidence and protection.

Technical Specifications

  • Refer to manufacturer documentation for complete technical specifications.

Installation & Operation

  1. Verify electrical requirements match available power supply. Confirm voltage (12 to 24VDC) and current capacity before proceeding.
  2. Disconnect power supply before beginning installation. Follow all applicable electrical codes and safety procedures.
  3. Mount the unit in the specified location ensuring adequate clearance for wiring access, ventilation, and future service requirements.
  4. Route and connect wiring according to manufacturer wiring diagrams. Use appropriate wire gauge and connectors for the application.
  5. Configure operational settings including any configurable options per application requirements.
  6. Restore power and test all functions including normal operation, alarm/alert functions, and integration with connected systems.
  7. Complete final inspection and document settings. Refer to manufacturer documentation for complete wiring diagrams, programming instructions, and troubleshooting.

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

EcoFlex Energy Technology

Revolutionary power management creates up to 89% energy savings on electromechanical functions while maintaining full operational capability. This advanced technology reduces power consumption up to 96% compared to traditional electromechanical mortise locks, making it ideal for sustainable building applications and reducing operational costs.

Why Choose Sargent Quality?

Sargent 8255 mortise locks deliver professional-grade reliability with patented design and construction rated for 16 million cycles through rigorous UL testing verification. The comprehensive 10-year limited warranty on mechanical components and 2-year electrical coverage demonstrates the manufacturer's confidence in long-term performance. Engineered for demanding commercial applications where dependable performance and energy efficiency are essential, with Grade 1 ANSI/BHMA certification and extensive fire safety approvals.

Product Documentation & Resources

Manufacturer Resources

Product Specs

Series:
8200 Series
Grade:
Grade 1
Keyed Function:
Single Cylinder
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Subcategory:
Bored Locksets
Keyed:
Yes
Commercial/Residential:
Commercial
Lock Type:
Mortise
Lock Function:
Office/Entry
Product Type:
Mortise Locks
Duty Level:
Heavy Duty
Handle Type:
Lever
Product Attribute:
Mortise Locks
Electronic:
No
Product Function:
Entrance/Office
Product Category:
Mechanical Locks
Collection:
8200 Series
Department:
Door Hardware

Sargent 8255 LNA 10BE – Frequently Asked Questions

1) What door applications work with the Sargent 8255 mortise lock?
The 8255 handles office or entry function requirements on commercial doors. Works with standard 1-3/4" thick doors. Verify door weight capacity and frame compatibility before installation.
2) How does single cylinder operation work on this lock?
Single cylinder means key operates from exterior side only. Interior uses thumb turn for locking/unlocking. Standard configuration for most office and entry applications.
3) What door handing options are available?
Most Sargent 8200 series locks accommodate field reversible handing. Check specific model specifications and installation template to confirm left hand or right hand compatibility.
4) What finishes does Sargent offer for the 8255?
Common finishes include satin chrome, bright brass, and oil rubbed bronze. Verify available finishes with specific model number as options vary by series.
5) What grade rating does this mortise lock carry?
Grade 1 rating meets ANSI/BHMA standards for heavy duty commercial use. Designed for high traffic applications with superior durability and security performance.
6) Does this lock meet fire door code requirements?
Many Sargent 8200 series locks are available with fire rating options. Check local fire codes and verify specific model compliance with building requirements.
7) What replacement parts are commonly needed?
Common service parts include cylinders, springs, and lever handles. Sargent maintains parts availability for current production models. Keep model number for parts ordering.
8) What tools are required for installation?
Standard mortise lock installation requires door mortising equipment, drill bits, and basic hand tools. Follow manufacturer template for precise measurements and alignment.
9) How do you adjust the latchbolt on this model?
Most Sargent mortise locks include adjustable latchbolt mechanisms. Consult installation instructions for proper adjustment procedures to ensure smooth operation.
10) What other 8200 series models are similar?
The 8200 series includes various function options like passage, privacy, and classroom functions. All share similar construction quality and Grade 1 performance standards.
11) What environmental conditions affect performance?
Extreme temperatures and humidity can affect lock operation. Choose appropriate finish for coastal or high moisture environments. Regular lubrication maintains smooth function.
12) What are the key measurements for door preparation?
Standard mortise preparation requires specific pocket dimensions and cross bore measurements. Use manufacturer template for exact specifications. Door thickness and frame clearances are critical.
How fast can I get the Sargent 8255 LNA 10BE delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Sargent 8255 LNA 10BE come with a warranty?
Absolutely. The Sargent 8255 LNA 10BE is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Sargent 8255 LNA 10BE?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Sargent 8255 LNA 10BE from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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