BB31 4-1/2 x 4-1/2 BALL BEARING .134 HINGE
Ships in 1-3 Business Days
Cal-Royal BB31 Ball Bearing Hinge – 4-1/2" x 4-1/2", .134 Gauge
Reliable, Smooth Operation for Medium-Duty Commercial Doors
The Cal-Royal BB31 is a full mortise, five-knuckle ball bearing hinge designed for medium-frequency doors in commercial and institutional settings. Built with precision and durability in mind, it ensures smooth door operation and long-lasting performance.
🔧 Key Features:
- Full mortise hinge with five knuckles for enhanced stability and alignment
- Two permanently lubricated ball bearings reduce friction and wear
- Standard weight design with .134" gauge thickness for medium-duty applications
- Constructed from high-quality 1040 steel or 304 stainless steel for strength and corrosion resistance
- Size: 4-1/2" x 4-1/2" – fits most commercial wood or hollow metal doors
- Meets ANSI/BHMA A156.1 standards for commercial-grade hinges
- Available with Non-Removable Pin (NRP) option for added security on outswing doors
- Supplied with fasteners for both wood and metal door frames
- Compatible with door closers and recommended for medium-frequency usage
- Offered in multiple architectural finishes including Satin Chrome (US26D), Satin Stainless Steel (US32D), Satin Brass (US4), and Flat Black (US1/622)
✅ Why Choose the Cal-Royal BB31?
- Ideal for offices, schools, healthcare facilities, and light commercial environments
- Provides smooth, quiet door movement with reduced maintenance needs
- Enhances door security and performance with durable ball bearing design
- Backed by Cal-Royal’s commitment to quality and reliability
Upgrade your door hardware with the Cal-Royal BB31 – engineered for smooth performance and built to last.
Ships in 1-3 Business Days
Cal-Royal BB31 Ball Bearing Hinge – 4-1/2" x 4-1/2", .134 Gauge
Reliable, Smooth Operation for Medium-Duty Commercial Doors
The Cal-Royal BB31 is a full mortise, five-knuckle ball bearing hinge designed for medium-frequency doors in commercial and institutional settings. Built with precision and durability in mind, it ensures smooth door operation and long-lasting performance.
🔧 Key Features:
- Full mortise hinge with five knuckles for enhanced stability and alignment
- Two permanently lubricated ball bearings reduce friction and wear
- Standard weight design with .134" gauge thickness for medium-duty applications
- Constructed from high-quality 1040 steel or 304 stainless steel for strength and corrosion resistance
- Size: 4-1/2" x 4-1/2" – fits most commercial wood or hollow metal doors
- Meets ANSI/BHMA A156.1 standards for commercial-grade hinges
- Available with Non-Removable Pin (NRP) option for added security on outswing doors
- Supplied with fasteners for both wood and metal door frames
- Compatible with door closers and recommended for medium-frequency usage
- Offered in multiple architectural finishes including Satin Chrome (US26D), Satin Stainless Steel (US32D), Satin Brass (US4), and Flat Black (US1/622)
✅ Why Choose the Cal-Royal BB31?
- Ideal for offices, schools, healthcare facilities, and light commercial environments
- Provides smooth, quiet door movement with reduced maintenance needs
- Enhances door security and performance with durable ball bearing design
- Backed by Cal-Royal’s commitment to quality and reliability
Upgrade your door hardware with the Cal-Royal BB31 – engineered for smooth performance and built to last.
Shipping & Delivery
We are committed to getting your order to you as quickly as possible. Below is an overview of our standard shipping timelines.
In-Stock Items
Orders for in-stock items are processed and shipped within 24–48 hours of order placement. You will receive a shipping confirmation with tracking information once your order has been dispatched.
Out-of-Stock / Special Order Items
Items that are not currently in stock are typically available and ready to ship within approximately 2 weeks. Our team will notify you of any changes to this timeline and provide updates throughout the fulfillment process.
Questions?
If you have any questions about your order or shipping status, please don't hesitate to contact us. We're happy to help.