Lock Shearing Bolted Coupler

Lock Shearing Bolted Rebar Coupler

Lock Shearing Bolted Rebar Coupler is a mechanical reinforcement coupler designed to connect two steel reinforcement bars using a locking and shear-bolting system. The threadless design eliminates the need for conventional bar-end threading and provides a practical solution for mechanical rebar splicing.

The coupler consists of a mechanical sleeve and locking shear bolts that secure the reinforcement bars inside the coupler body. The bars are inserted, aligned and secured according to the specified installation procedure. This type of mechanical connection can be particularly useful where reinforcement bar rotation, threading or welding is difficult.

How Does a Shear Bolting Rebar Coupler Work?

The reinforcement bars are inserted into opposite ends of the coupler and positioned according to the specified insertion requirements. Locking shear bolts are then tightened to secure the bars mechanically. For shear-bolt designs, the bolt heads can provide a visible indication that the specified tightening condition has been reached.How Does a Shear Bolting Rebar Coupler Work?

The reinforcement bars are inserted into opposite ends of the coupler and positioned according to the specified insertion requirements. Locking shear bolts are then tightened to secure the bars mechanically. For shear-bolt designs, the bolt heads can provide a visible indication that the specified tightening condition has been reached.

Key Features & Benefits

• No Rebar Threading Required: No threading machine, no bar end preparation, no electricity needed
• Lock Shearing Technology: Bolts shear at controlled torque for guaranteed full-strength joint
• 100% Strength Connection: Exceeds yield strength of parent TMT bar
• Time and Labour Saving: Installs in 2-3 minutes with only a torque wrench
• Old to New Bar Connection: Perfect for joining existing rebar to new rebar
• Reduces Congestion: Compact design ideal for heavily reinforced columns and beams

MBT Coupler Size & Specification Table

Installation

1. Clean and inspect the reinforcement bar ends.
2. Insert the reinforcement bars into the coupler.
3. Check bar insertion and alignment.
4. Tighten the locking/shear bolts according to the approved installation procedure.
5. Verify the completed connection visually.
6. Complete the required quality inspection before concreting.

Quality and Testing

The coupler should be manufactured and tested according to the applicable product specification, reinforcement grade and project requirements. Applicable testing may include tensile strength, percentage elongation, slip, cyclic tensile and fatigue testing in accordance with the relevant requirements of IS 16172:2023.

Advantages of Lock Shearing Bolted Coupler

• Threadless Installation: Conventional threading of reinforcement bar ends is not required.
• Mechanical Splicing: Provides an end-to-end mechanical connection between reinforcement bars.
• Easy Site Application: The connection is completed through mechanical bolt tightening.
• Suitable for Restricted Rotation: Useful in locations where rotating reinforcement bars is difficult.
• Reduced Reinforcement Congestion: Mechanical splicing can reduce overlapping reinforcement associated with conventional lap splicing.
• No Welding: The mechanical splice does not depend on welding the reinforcement bars.

Shear Bolting Rebar Coupler for Construction

Shear Bolting Rebar Couplers are useful where conventional threaded connections are difficult to install, particularly in congested reinforcement zones and repair or retrofit applications. The appropriate coupler should be selected according to reinforcement bar diameter, grade, required performance and project specifications.

Surya Engineering supplies mechanical rebar couplers for construction and infrastructure applications. Contact our technical team for available sizes, specifications, testing documentation and project requirements.

Why Buy from Surya Engineering?

Surya Engineering is a leading Lock Shearing Bolted Coupler Manufacturer and Supplier in Mumbai, Maharashtra. We maintain ready stock for 16mm to 40mm, offer wholesale price for bulk orders, Pan India delivery, and on-site installation support for contractors and infrastructure projects.

Frequently Asked Questions (FAQ)