Marks USA MAR175RDC 175RDC Communicating Lever Cylindrical Lockset - SFIC Prep, Grade 2, Less Cores, ADA Compliant

Marks USA 175RDC Communicating Lever Cylindrical Lockset — SFIC Prep, Grade 2, Less Cores

The Marks USA 175RDC is a commercial-grade cylindrical lever lockset from the 175 Series, engineered for communicating door applications with SFIC (Small Format Interchangeable Core) preparation and supplied less cores. Built on a chassis featuring cast retractors on bronze roller bearings, this lockset exceeds BHMA Grade 1 specifications by 300%, surpassing 3.6 million cycles for exceptional long-term reliability. It accommodates door thicknesses of 1-5/8" to 1-7/8" (with optional K1904 spacer for 1-3/8" doors), offers 2-3/8" and 2-3/4" backsets, and carries a 3-Hour Fire Rating along with UL Listing and ANSI/BHMA certification.

Key Features

• Exceptional Cycle Durability: Exceeds BHMA Grade 1 specifications by 300% with over 3.6 million cycles, ensuring long-term reliability in high-traffic commercial environments.
• Unique Clutch Mechanism: The Survivor leverset features a stainless steel "clutch" that disengages levers from the retractor when locked, allowing levers to swing freely without resistance — dramatically reducing wear, abuse, and lever droop.
• Bronze Roller Bearing Construction: Cast retractors on bronze roller bearings provide a strong, durable chassis foundation for millions of cycles of dependable operation.
• Backset & Door Compatibility: Supports 2-3/8" and 2-3/4" backsets; fits door thicknesses of 1-5/8" to 1-7/8"; use K1904 spacer for 1-3/8" doors.
• Latch Specifications: Latch #1834 with 1-1/8" x 2-1/4" front, 9/16" throw, and stainless steel nose for deadlocking performance.
• Solid Cast Zamac Levers: Levers are solid cast zamac with 1/2" return (except 395 & 495 styles), providing robust construction for demanding commercial use.
• Thru-Bolted Rose Assembly: 3-7/16" diameter spring-loaded roses secured with 2 #10 thru-bolts for a secure, rattle-free installation.
• 3-Hour Fire Rated: Certified for 3-hour fire-rated door assemblies, meeting critical life-safety code requirements.
• ADA Compliant: Lever design meets ADA accessibility requirements for commercial applications.
• Marks Lifetime Mechanical Warranty: Backed by Marks USA's Lifetime Mechanical Warranty for added confidence and long-term value.

Certifications & Compliance

• ANSI/BHMA Certified — Exceeds Grade 1 by 300% (over 3.6 million cycles)
• UL Listed
• 3-Hour Fire Rated
• ADA Compliant
• Marks Lifetime Mechanical Warranty

Technical Specifications

• Series: 175 Series
• Product Group: Mechanical Locks
• Product Subgroup: Bored Locksets
• ANSI/BHMA: ANSI/BHMA, UL Listed
• Commercial/Residential: Commercial
• Function Description: Latch retracted by knobs/levers at all times
• ADA Compliant: Yes
• Keyed: No
• ANSI Function: F75
• Product Function: Passage/Hall/Closet
• Latch Type Specification: Deadlocking
• Product Category: Mechanical Locks
• Department: Door Hardware

Typical Applications

• Commercial Office Buildings — Communicating and passage doors between suites
• Healthcare Facilities — Patient room and corridor communicating doors
• Educational Institutions — Classroom and hallway passage doors
• Hospitality Properties — Hotel room communicating door configurations
• Government and Municipal Buildings — Interior passage and hall doors
• Multi-Tenant Residential Properties — Common area and corridor doors
• Retail Establishments — Stockroom and back-of-house passage doors

Why Marks USA 175RDC?

The Marks USA 175RDC cylindrical lockset is built on a foundation of solid cast zamac levers, bronze roller bearings, and a patented stainless steel clutch mechanism that together deliver performance exceeding BHMA Grade 1 by 300% — surpassing 3.6 million cycles. With 3-Hour Fire Rating, UL Listing, ANSI/BHMA certification, and ADA compliance, the 175RDC is engineered to meet the most demanding commercial door hardware requirements with a lower-maintenance, longer-lasting design.