BEST BB855 Heavy-Duty Steel Double Weight Concealed Ball Bearing Prison Hinge

BEST BB855 Heavy-Duty Steel Double Weight Concealed Ball Bearing Prison Hinge

Maximum Security Door Hardware for Detention Facilities

The BEST BB855 is a heavy-duty prison hinge engineered for high-security detention applications requiring exceptional strength and tamper resistance. Constructed from double weight steel with concealed ball bearing operation, this hinge supports doors weighing up to 800 lbs based on a 3' x 7' door with 3 hinges. Each hinge features two concealed hardened steel races containing sixteen 1/8" hardened and ground steel balls for smooth, silent operation while maintaining maximum security integrity.

Professional Features & Benefits

• Heavy-Duty Load Capacity: Double weight steel construction supports doors weighing up to 800 lbs (363 Kg) based on 3' x 7' door with 3 hinges for demanding detention applications.
• Concealed Ball Bearing System: Two concealed hardened steel races each containing sixteen 1/8" (3.2mm) hardened and ground steel balls ensure smooth, long-lasting operation while preventing tampering access.
• Tamper-Resistant Design: Concealed bearing assembly and welded, machined rolled knuckles provide enhanced security against forced entry attempts and vandalism.
• Specialized Application Support: Designed for lead-lined doors to x-ray rooms and other exceptionally heavy doors in high-security environments.
• Professional Construction: Rolled knuckles are welded and machined for maximum durability, typically made not swaged with no holes for full surface applications.
• Pre-Lubricated Operation: Concealed bearings are well lubricated ensuring smooth, long-lasting operation with minimal maintenance requirements.
• Detention Hardware Series: Part of BEST's specialized detention hardware line engineered specifically for correctional facility requirements.

Technical Specifications

• Bearing Type: Ball Bearing
• Commercial/Residential: Commercial
• Corner Style: Square Corners
• Department: Door Hardware
• Hinge Type: Full Surface
• Knuckles: 3
• Product Category: Door Hinges and Pivots
• Product Group: Door Hinges and Pivots
• Product Model: BB855
• Product Subgroup: Surface and Mortise Hinges
• Product Type: Hinges
• Series: Detention Hardware
• Subcategory: Hinges

Installation & Operation

1. Review manufacturer specifications and verify door preparation requirements including door thickness, weight capacity, and mounting surface compatibility for this heavy-duty hinge.
2. Use manufacturer-provided templates to mark mounting hole locations accurately on door and frame surfaces, ensuring proper alignment for smooth operation.
3. Prepare door and frame by drilling required holes and routing as specified in manufacturer instructions for full surface or full mortise applications.
4. Install all mounting hardware and secure the hinge to door and frame per manufacturer torque specifications, ensuring adequate support for heavy door loads.
5. Adjust operational components for proper alignment, smooth swing operation, and verify door closes properly without binding throughout the full range of motion.
6. Test hinge operation under load conditions to verify proper function and make final adjustments as needed. Refer to manufacturer documentation for complete installation details and load specifications.

Professional Applications

• Correctional Facilities and Detention Centers
• High-Security Government Buildings
• Mental Health Facilities
• Courthouse Holding Areas
• Prison and Jail Cell Doors
• Lead-Lined X-Ray Room Doors
• Maximum Security Access Points

Tamper-Resistant Design

The BB855 features concealed ball bearing construction that prevents access to moving components, eliminating potential tampering points. The welded and machined rolled knuckles provide additional security against forced entry attempts while maintaining smooth operation essential for high-security detention environments.

Why Choose BEST Quality?

BEST BB855 detention hinges deliver maximum security performance with double weight steel construction rated for doors up to 800 lbs. The concealed ball bearing system with sixteen hardened steel balls per race ensures reliable operation in the most demanding correctional environments. Engineered specifically for detention applications where tamper resistance and exceptional durability are critical requirements.