XQV JLM Precision Rolling Screw Steel Anchorage – Complete Anchoring System for High-Strength Threaded Bars

Nut + Bearing Plate + Spiral Reinforcement Assembly for Φ25 & Φ32 Finish Rolled Rebars – Reliable Tensioning Anchor

Product Introduction

The XQV JLM precision rolling screw steel anchorage is composed of nut, spiral reinforcement and bearing plate, and is suitable for the tensioning anchor of Φ25 and Φ32 high strength precision rolling screw steel bar. The extension of steel bar adopts connector instead of butt welding, and is characterized by simple connection and anchoring, safety and reliability, and convenient construction. The supporting tensioning machine and tool are YCW70B type jack and ZB4-500 electric oil pump. This anchorage system provides a complete solution for post-tensioning of high-strength threaded bars in concrete structures.

Key Features & Advantages

🔧 Complete Assembly: Includes nut, spiral reinforcement, and bearing plate – ready for tensioning anchoring.

📏 Bar Compatibility: Designed for Φ25 and Φ32 high-strength precision rolling screw steel bars (finish rolled rebars).

🔗 Connector for Bar Extension: Uses connector instead of butt welding for simple, safe, and reliable bar splicing.

🏗️ Convenient Construction: Easy to install on site, reduces labor and equipment requirements.

⚙️ Matched Tensioning Equipment: Supports YCW70B jack and ZB4-500 electric oil pump.

📜 Compliant Standards: Manufactured to GB/T14370-2015, JT/T329-2010, TB/T3193, ISO, CE, ASTM, BS.

Technical Parameter – JLM Anchor & Bearing Plate

Type No.	D (mm)	S (mm)	H (mm)	A (mm)	Ad (mm)	H1 (mm)
JLM25	58	50	60	110	32	20
JLM32	70	60	70	140	40	20

* All dimensions in mm. Data for reference only; custom sizes available upon request.

Structure Diagram of JLM Anchor and Subplate

Parts Specification

Component Name	Specification	Materials	Surface Treatment	PKG Method	Standard
Anchor Head	–	40Cr	Corrosion Protection	cardboard box or wooden case	GB/T14370-2015, JT/T329-2010, TB/T3193, ISO, CE, ASTM, BS…
Connector	–	40Cr
Bearing Plate	–	ZG270-500
Spiral Reinforcement	–	HRB400
Nut	–	40Cr

Prestressing Concrete Rebar (Finish Rolled Rebar)

Parameter	Specification
Diameter	18mm, 20mm, 25mm, 32mm, 36mm
Length	9m, 12m (custom available)
Yield Strength Grades	PSB500, PSB785, PSB830, PSB930, PSB1080
Material	HRB400

The rebar for prestressing concrete, also known as finish rolled rebar, is a straight steel bar with large diameter, super-high strength, and high dimensional precision. The outer screw with equal-height rib is rolled onto the bar surface. It mainly serves for connection and anchoring in prestressed concrete structures. The profile and dimensions comply with the stipulations of traffic authorities, road planning, and design institutions for prestressing high-strength finish rolled rebar. Its characteristic profile is the equal-height rib. Custom bar lengths, fixed bundle quantities, small-package options, and minus-deviation weight delivery are available upon customer agreement.

* Custom specifications and packaging available upon request.

Application

The XQV JLM Precision Rolling Screw Steel Anchorage is widely used in projects requiring high-strength threaded bar tensioning and anchoring. Its complete assembly (nut, bearing plate, spiral reinforcement) ensures reliable load transfer and structural integrity. Typical applications include:

Bridge Engineering: Used for post-tensioning of finish rolled rebars in bridge piers, tower anchor zones, and box girder longitudinal tendons. The anchorage system works with YCW70B jacks for precise tensioning.

Tunnel Construction: Applied in rock bolt anchoring, primary and secondary lining reinforcement, and tunnel portal stabilization. The connector replaces butt welding for bar extension in confined spaces.

High-Rise Building Foundations: Anchors high-strength threaded bars in deep foundation pits, pile caps, and transfer beams. The nut and bearing plate distribute tension loads effectively.

Water Conservancy & Hydropower Projects: Used for dam foundation anchor bars, spillway pier reinforcement, and lock chamber wall tendons. Corrosion-protected components ensure long-term durability in wet environments.

Slope Stabilization & Ground Anchors: Provides permanent or temporary anchorage for landslide remediation, retaining walls, and excavation support systems. Compatible with Φ25 and Φ32 finish rolled rebars.

Precast Concrete Connections: Applied in precast column-to-foundation splicing, beam-column joints, and segmental bridge element connections. Standardized threads allow rapid assembly.

Railway Engineering: Used for prestressed concrete sleeper reinforcement, rail anchoring systems, and bridge abutment bar splicing.

Workshop

Our Manufacturing Base – Liuzhou Xuanqiao Prestressed Machinery Co., Ltd.

Located in Liuzhou, Guangxi – a key industrial hub for prestressed technology – our modern workshop covers over 10,000㎡. We operate CNC machining centers, automated assembly lines, and precision testing equipment to ensure consistent quality.

Every batch of raw material is inspected, and finished products (anchors, jacks, pumps, ducts) are tested in our in‑house laboratory for mechanical performance and pressure resistance. We are certified under ISO 9001:2015 and comply with FIP international standards.

Annual capacity: 6 million anchor holes and 1,000+ sets of hydraulic equipment. Our experienced technicians and engineers follow strict SOPs to guarantee reliability.

We maintain sufficient raw material inventory and finished goods for fast delivery. Continuous investment in equipment and training keeps us at the forefront of prestressed manufacturing – because a strong factory means reliable products and long‑term trust.