Adams Rite MS1890 Series: Complete Technical & Selection Guide

Adams Rite MS1890 Lock Series Guide

The Adams Rite MS1890 lock series combines a hardened deadlock with a smooth spring latchbolt. Built specifically for narrow stile aluminum doors, this hybrid lock offers reliable protection for commercial spaces. Facilities often install it to keep storefront doors safe without blocking regular entry during business hours.

For broader building safety options, explore our complete door security hardware range.

What is the Adams Rite MS1890? Dual-Function Security Explained

The Adams Rite MS1890 is a heavy-duty, dual-function lock built for commercial glass doors. Storefront entryways require flexible access control throughout a typical workday. They need smooth entry for shoppers during peak operating hours. Yet they also demand strong physical resistance against forced entry after dark.

Installing separate locks to handle these jobs weakens thin aluminum door frames. Cutting multiple mortise pockets strips away crucial structural metal from the stile. The Adams Rite MS1890 resolves this issue by combining a spring deadlatch and a deadlock into one lock body. Security hardware specialists call this specialized layout an "MS+" dual solution.

During normal business hours, the spring deadlatch controls routine foot traffic. Store staff can retract the latch bolt using a standard key cylinder, thumbturn, or exit lever. The deadlatch holds the door securely closed against wind pressure and draft noise. It prevents unwanted entry while keeping daytime traffic moving efficiently.

At the close of business, turning the key fully extends the heavy deadlock bolt. This five-ply laminated steel bolt projects deep into the door jamb strike plate. Tests show that laminated steel bolts easily resist prying, hacksaw attacks, and heavy impacts. Intruders cannot easily force or slip the bolt open with simple manual tools.

This two-in-one design streamlines hardware specification for facility managers. You get flexible daytime traffic management and robust overnight security from a single mortise cutout. It preserves structural door strength, reduces installation labor, and protects commercial assets. Building operators gain complete peace of mind without cluttering entrance doors with extra hardware.

The lock accommodates standard backset options like 31/32-inch, 1-1/8-inch, and 1-1/2-inch dimensions. These choices fit roughly 95% of commercial aluminum door frames found in modern buildings. Maintenance teams can retrofit existing single-function locks without altering door frame cutouts. Now, let us examine the specific technical specifications that make this performance possible.

Technical Specifications and Architecture of the Adams Rite MS1890

The Adams Rite MS1890 combines deadbolt security with latching convenience in a single housing. Built to ANSI/BHMA A156.5 Grade 1 standards, this lock set handles over a million door cycles without breaking down. Facility managers often choose this hardware for high-use commercial entryways. Its internal mechanism resists physical force while maintaining smooth, reliable operation every day.

At the heart of the hardware sits a five-ply laminated stainless steel bolt. This layered design uses multiple metal plates to absorb sharp impacts from crowbars or mallets. A hardened ceramic core sits inside the center ply to stop cutting tools. If someone tries to saw through the deadbolt, the ceramic insert dulls hacksaw blades almost immediately.

Fitting narrow-stile aluminum glass doors requires flexible mounting options. The Adams Rite MS1890 comes in three standard backset measurements: 31/32 inch, 1-1/8 inches, and 1-1/2 inches. These choices fit most hollow metal and storefront aluminum door frames. The deadbolt projects a full 13/16 inch into the strike, creating a deep hold against prying.

The lock case relies on heavy-gauge zinc-plated steel to prevent rust and internal wear. It accepts standard 1-5/32 inch diameter mortise cylinders for easy master keying. Security consultants recommend this setup because it combines physical toughness with simple maintenance. Installers can service or swap key cylinders in minutes without replacing the entire door assembly.

Traffic Management Modes and Operation

Commercial entrances need distinct security settings throughout the business day. The Adams Rite MS1890 meets these requirements by offering three unique operational modes. It combines a heavy-duty deadbolt and a spring latch in one narrow stile body. Switching between modes helps staff balance building access and emergency egress.

In full deadlock mode, the lock provides total off-hours security. Turning the key or turn lever extends a strong hookbolt deep into the jamb strike. Locksmith guidelines note that extended hookbolts offer maximum resistance against prying forces. In this mode, the latch mechanism remains inactive, so anyone entering or exiting needs a key.

Deadlatch mode manages secure entry during standard business hours. In this setting, the main hookbolt stays safely retracted inside the lock housing. The auxiliary deadlatch keeps the door securely latched against wind and building pressure. Outside guests require a key to open the door, while inside occupants push an egress paddle to exit.

Free-exit or latch holdback mode works best during peak shopping hours. Managers use a key turn or mechanical feature to hold both bolts retracted inside the case. Doors swing open easily in both directions without hardware friction. Security experts suggest this mode during busy store hours to prevent mechanical wear on internal springs.

Installation, Maintenance, and Troubleshooting Checklist

Installing the Adams Rite MS1890 lock requires precise cutouts in narrow stile aluminum doors. Standard backset options measure 31/32 inches, 1-1/8 inches, or 1-1/2 inches. Always measure from the door frame edge to the cylinder centerline before cutting metal. For step-by-step guidance on similar latch systems, see our guide on how to install a mortice hooklatch. Secure the lock body tightly inside the aluminum stile using the provided mounting clips.

This dual-action lock works with standard 1-5/32 inch diameter mortise cylinders. You can pair it with key cylinders, thumbturns, or specialized exterior levers. Make sure your cylinder uses a standard MS series cam shape. Using incorrect cylinder cams will jam the internal deadbolt linkage and damage the drive hub.

Routine maintenance keeps commercial door locksets operating smoothly over time. Apply a dry graphite or PTFE lubricant into the keyway and bolt track twice a year. Avoid heavy oil-based lubricants like generic multi-purpose sprays. Sticky oil attracts airborne dust, grit, and metal shavings that bind internal springs.

Follow this troubleshooting checklist to solve common alignment issues:

• Verify Cylinder Depth: Thread the mortise cylinder in carefully until it rests flush against the door face without crushing parts.
• Check Strike Alignment: Sagging heavy-traffic doors cause bolt misalignment, so ensure the bolt enters the center of the strike cutout.
• Adjust Door Stile Gap: Maintain a uniform 1/8 inch clearance between the door edge and frame stop to allow full engagement.
• Inspect Bolt Clearance: Ensure the frame jamb pocket is deep enough so the deadbolt throws fully without hitting frame screws.
• Tighten Mounting Hardware: Re-torque all mounting bridge screws to stop the lock body from shifting inside the aluminum channel.

In addition to correct installation, combining this lock with complementary hardware boosts overall entryway security.

Recommended Commercial Security Hardware

Selecting the right hardware for aluminum narrow stile doors requires precise component matching. The Adams Rite MS1890 series offers unique flexibility for busy commercial entryways. It combines a heavy-duty deadbolt with a spring latch in a single mortise body.

This design delivers convenience during business hours and robust key security at night. You avoid the need to cut multiple slots into thin aluminum door frames.

To build a complete security setup, pair this lock with standard 1-5/32 inch mortise cylinders from top rated Security Solutions brands UK. Look for cylinders fitted with hardened steel pins and protective anti-drill plates. Many facility managers install a thumbturn cylinder on the interior side. This layout supports quick egress during fires while maintaining strict exterior access control.

Always check your precise door thickness before ordering hardened cylinder guard rings. Finish your installation with durable heavy-gauge faceplates and armored strike plates. Anodized aluminum and satin architectural finishes offer reliable corrosion resistance for storefront entrances. For high-traffic retail doors, pair the latch mechanism with ergonomic push paddle handles or lever controls.

Upgrading Your Commercial Door Lock System

Upgrading your aluminum storefront doors with robust hardware is a smart long-term investment. Heavy-duty lock systems like the Adams Rite MS1890 offer exceptional durability for commercial entryways. Standard commercial locks often wear out quickly under heavy foot traffic. However, Grade 1 mechanisms withstand constant daily use while lowering long-term repair costs.

Combining maximum security deadbolts with flexible latch mechanisms gives you total control over entry points. Proper installation ensures your building remains fully protected against unauthorized entry. High-quality security hardware protects your assets, employees, and physical property over time.

To learn more about modern building access strategies, explore where to buy Security Solutions products online UK. You can also contact our support team to get direct advice on hardware selection, custom keying options, and code compliance. Investing in reliable commercial lock hardware keeps your business safe and running smoothly for years to come.

Frequently Asked Questions

What is the Adams Rite MS1890 lock?

The Adams Rite MS1890 is a dual-function commercial lock designed specifically for narrow stile aluminum glass doors. It combines a spring deadlatch for daytime traffic control and a heavy-duty deadlock for overnight security into a single lock body, preserving the door frame strength.

How does the Adams Rite MS1890 resist forced entry and cutting?

The Adams Rite MS1890 features a five-ply laminated stainless steel deadbolt with a hardened ceramic core insert. This multi-layered design absorbs heavy impacts from mallets or crowbars, while the ceramic core immediately dulls hacksaw blades if someone attempts to saw through the bolt.

What backset sizes are available for the Adams Rite MS1890?

The Adams Rite MS1890 offers three standard backset options: 31/32 inch, 1-1/8 inches, and 1-1/2 inches. These dimensions fit approximately 95 percent of commercial aluminum and hollow metal door frames found in modern commercial buildings.

How do you maintain the Adams Rite MS1890 lock set?

You should use a dry graphite or PTFE lubricant applied directly into the keyway and bolt track twice a year. Avoid heavy oil-based lubricants or generic sprays, as sticky oil attracts airborne dust, grit, and metal shavings that bind the internal springs over time.