PJSZ Two-Speed Balancer for Precise Positioning
Product Introduction
PJSZ Series Two-Speed Balancer (PJSZ Series Dual-Speed Balancer) is an upgraded version of the PJ Series Balancer, with a rated lifting capacity of 100–1000 kg. Its core advantage lies in the dual hoisting speeds (10:1 speed ratio), which significantly enhances operating accuracy and controllability. Built on the four-bar linkage of the PJ Series, the PJSZ model integrates a two-speed motor and an electrical control system, offering inching and braking functions during lifting for precise load positioning and placement.
Product Specifications
- Product Name: PJSZ Series Two-Speed Balancer / PJSZ Type Fast/Slow-Speed Balancer
- Model: PJSZ100KG ~ PJSZ1.0 (10 specifications available)
- Rated Lifting Capacity: 100–1000 kg
- Hoisting Speed: Dual-speed adjustable (fast/slow ratio 10:1), fast speed 2.54–6.14 m/min, slow speed 0.254–0.614 m/min
- Category: Electric two-speed balancer
- Place of Origin: Changyuan, Xinxiang, Henan
- Power Type: Electric hoisting (two-speed motor) + manual push/pull for horizontal movement and slewing
- Supply Scope: Nationwide
- Delivery Method: Self-pickup or freight forwarding arranged
- After-Sales Service: One-year warranty
Product Features
Two-Speed Hoisting (10:1 Ratio): The fast speed is ideal for rapid lifting of empty hooks or light loads, while the slow speed enables precise, gradual adjustments for heavy loads or accurate positioning — greatly improving both efficiency and positioning accuracy.
Inching + Braking: The two-speed electrical system features an integrated inching function, allowing millimeter-level fine adjustments in slow-speed mode. The braking function ensures the load remains securely in place after stopping, preventing load slipping.
Four-Bar Linkage for Equilibrium at Any Position: Using the same four-bar linkage principle as the PJ Series, the load can be held stably at any point within the working range.
Compact and Effortless: Compared to jib cranes and overhead cranes, the balancer is smaller, lighter, and takes up less space. Manual push/pull operation is intuitive and requires minimal effort.
High Positioning Accuracy: The combination of dual-speed control and manual push/pull delivers millimeter-level positioning accuracy, making it ideal for workstations with strict positional requirements.
Versatile Applications: Widely used across industries including machine tool loading/unloading, assembly lines, casting, and heat treatment.
Working Principle
The working principle of the PJSZ Series Two-Speed Balancer is based on the PJ Series four-bar linkage mechanism, enhanced with a two-speed motor drive system. The four-bar linkage ensures the load reaches a state of equilibrium at any position within the working range. The two-speed motor enables switching between fast and slow speeds via pole-changing speed control. Operators use buttons to select fast speed (for rapid lifting of empty hooks or light loads) or slow speed (for heavy loads or precise positioning). Horizontal movement and slewing around the column are controlled manually by push/pull. The two-speed electrical system also integrates an inching function (jog-mode micro-displacement in slow-speed mode) and a braking function (automatic braking upon stopping to prevent load slipping), making the PJSZ Series superior to standard single-speed balancers in both operating accuracy and safety.
Product Structure
The PJSZ Series Two-Speed Balancer consists of the following core components:
Column: Fixed to the floor, supporting the entire boom system. The PJSZ1.0 model features a reinforced column.
Four-Bar Linkage Boom: A parallelogram mechanism composed of four links, providing equilibrium at any position.
Two-Speed Hoisting Mechanism: Driven by a two-speed motor and gearbox, with a fast/slow speed ratio of 10:1 and an integrated brake.
Two-Speed Electrical Control System: Includes speed-switching buttons, inching buttons, and brake control, enabling four functions — fast speed, slow speed, inching, and braking.
Lifting Spreader: Hook or custom fixture, manually push/pull operated.
Product Images
Technical Parameters
| Model | PJSZ100KG | PJSZ020 | PJSZ030 | PJSZ040 | PJSZ050 | PJSZ060 | PJSZ070 | PJSZ080 | PJSZ090 | PJSZ1.0 |
|---|---|---|---|---|---|---|---|---|---|---|
| Rated Lifting Capacity(kg) | 100 | 200 | 300 | 400 | 500 | 600 | 700 | 800 | 900 | 1000 |
| Fast Gear Start Button(m/min) | 6.14 | 6.14 | 5.44 | 5.44 | 5.52 | 5.52 | 5.08 | 5.08 | 2.54 | 2.54 |
| Slow Gear Start Button(m/min) | 0.614 | 0.614 | 0.544 | 0.544 | 0.552 | 0.552 | 0.508 | 0.508 | 0.254 | 0.254 |
| Speed Ratio | 10:1(Fast/Slow Speed Switching,with Inching and Braking) | |||||||||
| Slewing Angle | 360°(Manual Slewing) | |||||||||
| Drive Type | Lifting OneElectric(Two-Speed),Rotation OneManual,Horizontal Movement OneManual | |||||||||
| Power Supply Power Supply | Three-Phase 380V 50Hz | |||||||||
| Operation Mode | Two-Speed Button Switching + Inching Inching / Jog Mode + Manual Push-Pull Horizontal/Slewing | |||||||||
The table above lists the Technical Parameters for all 10 models in the full PJSZ series two-speed balancer range. For high-resolution drawings, please contact our customer service team.
Typical Applications
Thanks to its fast/slow speed switching capability, the PJSZ two-speed balancer covers a broader range of applications than standard balancers:
Machine tool loading/unloading: Handling heavy workpieces on lathes, milling machines, and machining centers — the slow speed setting ensures precise alignment.
Precision Assembly Line: Assembly and repair of medium-sized components, where slow-speed fine adjustment guarantees assembly accuracy.
Assembly line integration: Loading/unloading and continuous flow operations in small-to-medium batch, multi-variety production environments.
Foundry workshop: Lifting for core setting, mold closing, and similar processes, with precise placement at slow speed.
Heat treatment workshop: Furnace charging and discharging in High-Temperature Environments — fast speed minimizes exposure time.
Die & mold changeover: Mold installation and removal demand slow-speed Precise Positioning, an area where the PJSZ two-speed balancer excels.
Selection Guide
PJSZ100KG~PJSZ020 (100–200kg): Ideal for machine tool loading/unloading and inter-process transfer of light components. Fast speed of 6.14m/min maximizes efficiency. Reference price: ¥4,000–8,000.
PJSZ030~PJSZ050 (300–500kg): Suited for assembly and repair of medium-weight workpieces. Two-speed switching enhances operational flexibility. Reference price: ¥7,000–12,000.
PJSZ060~PJSZ080 (600–800kg): Designed for lifting heavier parts. Features a reinforced Column structure. Reference price: ¥10,000–18,000.
PJSZ090~PJSZ1.0 (900–1000kg): Heavy-duty balancer with a strengthened column and boom assembly. Reference price: ¥15,000–25,000.
PJSZ vs. PJ — Key Differences
The core differences between the PJSZ two-speed balancer and the PJ single-speed model:
1. Hoisting speed: PJ offers a single speed (2.5–6.5m/min), while the PJSZ provides a 10:1 dual-speed ratio (fast: 2.54–6.14m/min + slow: 0.254–0.614m/min).
2. Positioning Accuracy: The PJSZ's slow speed of 0.254–0.614m/min, combined with fine-tuning capability, delivers significantly better Positioning Accuracy than the single-speed PJ.
3. Capacity range: PJ maxes out at 800kg; PJSZ extends to 1000kg, covering 1-ton lifting requirements.
4. Electrical system: The PJSZ is equipped with a two-speed motor, dual-speed Controller, and Brake — a more sophisticated yet more capable electrical system.
Summary: Choose the PJ for standard workstations where economy is key; choose the PJSZ two-speed balancer when you need Precise Positioning or 1-ton lifting capacity.
Operating Instructions
Pre-operation checks: Verify that all pivot points on the four-bar linkage move freely, the Wire Rope/chain is in good condition, the two-speed motor and Controller function properly, and the Brake operates reliably.
Speed selection: Use fast speed for empty hooks or light loads (maximizes efficiency); switch to slow speed for heavy loads or Precise Positioning (safety and accuracy).
Fine adjustment: In slow speed mode, use the Inching / Jog Mode button for millimeter-level positioning.
Lifting operations: The balancer achieves equilibrium at any position — the load stays put when released, ensuring safe handling. Never exceed the rated Lifting Capacity.
Brake inspection: Periodically test the Brake for responsiveness and reliability to prevent Load slipping after stopping.
Shutdown maintenance: Regularly inspect pin/shaft Wear on the four-bar linkage, Gearbox / Reducer Lubrication of the two-speed motor, insulation of electrical wiring, and Brake clearance.
Why Choose Kelude Heavy Industry
Two-Speed Lifting · Precision Control: The PJSZ series features a 10:1 two-speed motor with fine-tuning and Braking — fast speed for efficiency, slow speed for accuracy, delivering operating accuracy far beyond standard single-speed balancers.
Capacity from 100 to 1000kg: Full coverage across 10 models, and one of the few domestic manufacturers offering a 1000kg-class balancer for 1-ton precision lifting needs.
Turnkey Service: From concept design to after-sales maintenance — full lifecycle support with immediate phone response.
Service & Support
Kelude Heavy Industry provides full lifecycle support for the PJSZ two-speed balancer. For additional model specifications, Technical Parameters, or a Quotation, please call 13903802779 or chat with our sales team online — we respond within 24 hours.
FAQ
Q: What's the difference between the PJSZ two-speed balancer and the PJ single-speed balancer? How do I choose?
A: The PJSZ is an upgraded version of the PJ. The core difference is the hoisting speed: the PJ offers a single speed of 2.5~6.5m/min, while the PJSZ provides a 10:1 two-speed ratio (fast: 2.54~6.14m/min + slow: 0.254~0.614m/min). The PJSZ also adds inching and braking functions. For standard workstations, the PJ is sufficient. Choose the PJSZ when you need precise positioning (e.g., precision assembly, mold changing) or for handling loads around 1 ton.
Q: Which manufacturing standards does the PJSZ two-speed balancer comply with?
A: Its Design & Manufacturing complies with the JB/T 7330 industry standard for Balancers. The two-speed motor follows GB/T 755 (Rotating Electrical Machines – Rating and Performance). The four-bar linkage is designed per the jib system clauses of GB/T 3811 Crane Design Standard. The Brake meets GB/T 33529 requirements, and the safety devices comply with TSG Q7014 regulations.
Q: What is the price range for the PJSZ two-speed balancer?
A: Prices range from approximately ¥4,000–8,000 for 100~200kg capacity, ¥7,000–12,000 for 300~500kg, ¥10,000–18,000 for 600~800kg, and ¥15,000–25,000 for 900~1000kg. The price includes the two-speed motor, Electrical Control System, and Brake.
Q: Is the fast/slow speed switching on the PJSZ two-speed balancer automatic or manual?
A: It's manual. The Operation Panel has a selector button for fast/slow speed, allowing the operator to choose based on the working conditions. In slow speed mode, a fine-tuning Inching / Jog Mode button is also available for precise positioning down to the millimeter.
