Provide secure two-point locking for compatible roll-up doors, overhead doors, and security screens with the Adams Rite 1875 Two-Point Deadlock.

Designed to operate two locking bolts from a single mechanism, the 1875 provides synchronized locking through connecting rods that can be configured to suit the specific door design.

A 90° rotation of the turn projects or retracts both bolt arms, while a 360° turn of the key deadlocks the mechanism to prevent operation of the turn in either the locked or unlocked position.

Key Features

• Genuine Adams Rite / ASSA ABLOY

• Model 1875

• Two-point deadlocking mechanism

• Designed for:

  • Roll-up doors

  • Overhead doors

  • Security screens

  • Similar specialty door applications

• Operates two locking points from one mechanism

• 1-1/32" bolt-arm throw

• Bolt arms threaded for 1/4"-20 connecting rods

• Operates from either or both sides

• Accepts standard mortise cylinder with MS® cam

• Compatible with Adams Rite 4036 Mortise Cylinder

• Compatible with Adams Rite 4066 Thumbturn

• Compatible with optional 4060 Turn

• Steel lock case with corrosion-resistant plating

• Commercial-duty mechanical locking system

Two-Point Locking

The 1875 uses two bolt arms to operate remote locking points through connecting rods.

This allows one centrally located lock mechanism to secure the door at two separate locations.

Depending on the door design, these locking points may engage opposite sides, guides, jambs, or other properly prepared strike locations.

Lock Operation

Turn Operation

A:

90° rotation

of the compatible turn projects or retracts both locking bolts.

Key Deadlocking

A:

360° turn of the key

deadlocks the mechanism.

Once deadlocked, the operating turn cannot move the bolts whether they are:

• Projected / locked

• Retracted / unlocked

This allows the key cylinder to control whether the manual turn can operate the locking mechanism.

Mortise Cylinder Compatibility

The 1875 accepts a standard:

1" long x 1-5/32" diameter mortise cylinder

equipped with an Adams Rite MS® cam.

Compatible examples include:

• Adams Rite 4036 Mortise Cylinder

• Adams Rite 4066 Thumbturn

The lock can accept a cylinder from either or both sides depending on the required configuration.

Cylinder and thumbturn are sold separately.

Optional 4060 Turn

The compatible Adams Rite 4060 Turn is available separately.

The 4060 provides manual operation of the two-point locking mechanism and is available with different spindle lengths to accommodate various door thicknesses.

Bolt Arms

Bolt Arm Throw: 1-1/32"

The bolt arms are threaded for:

1/4"-20 connecting rods

This allows the locking mechanism to be connected to remotely located bolts appropriate for the specific door design.

Application-Specific Bolts & Rods

Because roll-up doors, security screens, and overhead doors vary significantly in construction, Adams Rite does not provide one universal bolt arrangement for every installation.

The following components must be selected to match the specific door:

• Connecting rods

• Remote bolts

• Bolt guides

• Strikes

These components are available separately or by special order.

Lock Case

The 1875 uses a steel lock case with corrosion-resistant plating.

Case Dimensions

Width: 1"
Height: 6"
Depth: 2-5/8"

The compact case allows installation within compatible door framing or stile construction where adequate clearance is available.

Required Internal Clearance

The bolt arms require approximately:

1-11/16" clearance on one side of the cylinder centerline

and:

1" clearance on the opposite side

Verify available space before preparing the door.

Finish

The standard 1875 lock body is supplied in:

603 – Zinc-Plated Steel

The operating trim and other accessories are ordered separately.

Special-Order Rod Assembly

A related special-order component is:

31-0278-XX – Bolt and Connecting Rod Assembly

Because dimensions depend on the specific door construction, verify required rod lengths and bolt configuration before ordering.

Common Applications

Ideal for compatible:

• Roll-up security doors

• Rolling grilles

• Security screens

• Overhead doors

• Counter shutters

• Commercial security closures

• Industrial door systems

• Specialty door applications

Product Specifications

Brand: Adams Rite
Model: 1875
Product Type: Two-Point Deadlock
Application: Roll-Up Doors / Security Screens / Specialty Doors
Number of Locking Points: 2
Bolt Arm Throw: 1-1/32"
Rod Thread: 1/4"-20
Cylinder Type: Mortise Cylinder with MS® Cam
Cylinder Length: 1"
Cylinder Diameter: 1-5/32"
Key Operation: 360° Deadlocking
Turn Operation: 90° Projects / Retracts Bolts
Case Material: Steel
Case Finish: 603 Zinc Plated
Case Size: 1" x 6" x 2-5/8"
Packaging: Individually Boxed

What's Included

• 1 Adams Rite 1875 Two-Point Deadlock Mechanism

Not Included Unless Specifically Stated

• Mortise cylinder

• Thumbturn

• 4060 operating turn

• Connecting rods

• Remote bolts

• Bolt guides

• Strikes

• Door

• Security screen

• Installation hardware specific to the door

Important Ordering Information

Before ordering, verify:

• Door or security-screen type

• Available mounting space

• Required locking-point locations

• Connecting-rod lengths

• Bolt configuration

• Guide configuration

• Strike requirements

• Cylinder configuration

• Turn configuration

• Required spindle length

Important

The 1875 is the central two-point deadlock mechanism.

Because roll-up doors and security screens vary widely in design, the bolts, rods, bolt guides, and strikes are application-specific and are not standard components included with the lock.