Hansheng Automation (Dongguan) Co., Ltd. is one of the most experienced manufacturers and suppliers of parallel dial index drives in China. If you're going to wholesale bulk cost-effective parallel dial index drives made in China, welcome to get pricelist and quotation from our factory. Also, customized service and OEM&ODM service are available.
Hansheng Automation's precision reducer products (Cam Indexer, Hollow Rotary Table, Planetary Gearbox, Harmonic Drive) are sold well overseas, such as the United States, Vietnam, India, Russia, etc. Our products are deeply trusted by customers in these countries. We can respond to your needs quickly, strictly control quality, and provide perfect after-sales service.
PU Index Drives Series Model Selection & Technical Specifications
| Model | Station Numbers (Stops) | Speed of Input Shaft (RPM) | Installation Surface | 2D / 3D CAD Drawing |
| PU50DS | 1, 2, 3, 4, 5, 6, 8 | 5 ~ 300 RPM* | Refer To Drawing | [Download CAD] |
| PU60DS | ||||
| PU65DS | ||||
| PU80DS | ||||
| PU100DS | ||||
| PU125DS | ||||
| PU150DS | ||||
| PU175DS | ||||
| PU225DS | ||||
| PU250DS | ||||
| PU320DS |
- Input shaft speed range: 5 ~ 300 RPM (operating speed is subject to actual loading condition and inertia).
- High-Speed Application Notice: Please inform our engineering team in advance if your application requires high-speed operation beyond standard limits for custom dynamic balancing and cam profile optimization.
Product Features
Dual Conjugate Plate Cam Mechanism
Input and output shafts are positioned in parallel; dual preloaded plate cams ensure zero backlash and smooth motion transmission.
01
Standard 1 to 8 Indexing Stations
Supports single-stop (1 stop for 360° per cycle) up to 8-stop configurations to match diverse rotary indexing requirements.
02
Wide Input Speed Range
Rated for input shaft speeds from 5 to 300 RPM (load-dependent; high-speed customized designs available upon request).
03
Flexible Multi-Face Mounting
Universal installation surfaces adaptable to horizontal, vertical, and custom machine configurations (refer to engineering drawings).
04
Low Vibration & High Durability
Oil-bath lubrication with precision cam followers reduces mechanical wear and thermal expansion during continuous operation.
05
How to Select Your PU Series Parallel Dial Index Drive
To select the correct PU-DS model size for your automation system, follow this 5-step engineering evaluation process:
Step 1: Determine the Number of Stops (Stations)
Choose the required number of index stations based on your machine layout:
Standard PU Series Station Options: 1, 2, 3, 4, 5, 6, or 8 stops.
Note: Single-stop (1 stop) provides 360-degree rotation per input cycle; multi-stop models divide rotation into equal angular steps (e.g., 4 stops = 90 degrees per index, 8 stops = 45 degrees per index).
Step 2: Verify Input Speed and Cycle Timing
Confirm your required operating speed matches the PU series standard input speed rating:
Standard Input Shaft Speed: 5 to 300 RPM (dependent on loading condition and cycle requirements).
Step 3: Calculate Total Output Load Inertia
Calculate the total moment of inertia on the output shaft by summing up all rotating components:
Calculation Formula:
Total Inertia (J) = Inertia of Dial Table + Inertia of Fixtures + Inertia of Workpieces
(Unit: kg·m² or kgf·m·s²)
Step 4: Estimate Dynamic Indexing Torque and Safety Factor
Calculate the dynamic torque required during the acceleration/deceleration phase:
Calculation Formula:
Dynamic Torque (Td) = (Total Inertia * Angular Acceleration) + Friction Torque
Recommended Safety Factor (Sf):
Always apply a safety factor of Sf = 1.5 to 2.0 (or higher for severe shock or high-speed emergency stop conditions) to ensure long-term mechanical reliability.
Step 5: Match with the Recommended PU-DS Model Size
Light-Duty / Compact Rotary Dials:
Choose PU50DS, PU60DS, PU65DS, or PU80DS (ideal for small pitch feeding, electronic component taping, and compact inspection tables).
Medium-Duty Assembly & Packaging Dials:
Choose PU100DS, PU125DS, PU150DS, or PU175DS (ideal for multi-station assembly machines, rotary blister packaging, and pouch indexing).
Heavy-Duty & High-Inertia Transfer Mechanisms:
Choose PU225DS, PU250DS, or PU320DS (ideal for heavy-load rotary fixtures, link-conveyor drives, and large-diameter indexing dials).
Operating Principle: How PU Series Parallel Cam Indexers Work
1. Parallel Shaft Conjugate Plate Cam System
Unlike right-angle globoidal indexers, the PU series features parallel input and output shafts. The input shaft carries two conjugate plate cams machined with high-precision motion curves. These dual cams rotate synchronously to engage the roller followers housed inside the output turret.
2. Preloaded Backlash-Free Transmission
The roller cam followers on the output turret are held in continuous, preloaded contact between the two conjugate cam profiles. This design completely eliminates mechanical clearance (zero backlash) without relying on friction brakes, providing high positional rigidity during intermittent stops.
3. Controlled Intermittent Motion & Dwell Phase
Index Period: The curved profile of the conjugate cams smoothly accelerates and decelerates the output turret to the next station according to a modified sine or trapezoidal curve.
Dwell Period: The concentric dwell profile mechanically locks the output shaft firmly in place, ensuring high repeatability and holding rigidity during processing or assembly steps.
Target Applications for PU Series Index Drives
High-Speed Packaging & Pouch Machinery
Provides precise pitch-feeding, intermittent film pulling, and sealing synchronization for automated packaging and cartoning equipment.
Electronic & Semiconductor Assembly
Used in multi-station testing dials, SMD taping machines, and visual inspection carousels where smooth start-stop and compact parallel space are required.
Conveyor & Transfer Line Feeds
Directly coupled via parallel shafts to drive chain sprockets, timing belts, or step-conveyors for automated part transfer lines.
Pharmaceutical & Medical Device Assembly
Rigid, oil-sealed construction suitable for clean automation environments, syringe assembly dials, and blister sealing indexing tables.
Automated Stamping & Riveting Feeders
Withstands dynamic indexing shocks in automated sheet metal feeding, terminal crimping, and precision rotary punching stations.
FAQ
Q: What does "PU-DS" stand for in the model code?
A: "PU" represents Hansheng's Parallel Dial Index Drive series (parallel shaft conjugate cam type). "DS" indicates the double-shaft (parallel shaft) output configuration with universal multi-surface mounting capabilities as specified in the dimensional drawing.
Q: What is the allowable input shaft speed for PU series indexers?
A: Standard PU series models operate at 5 ~ 300 RPM, depending on the actual load inertia and cycle time. If your machine design requires high-speed indexing beyond 300 RPM, please inform our team in advance so we can optimize cam curves, follower preloads, and dynamic balancing.
Q: What station configurations are available for the PU series?
A: The PU series (PU50DS through PU320DS) provides standard station options of 1, 2, 3, 4, 5, 6, and 8 stops. For custom station counts or irregular indexing angles, custom cam engineering is available upon request.
Q: What are the advantages of the "parallel axis design" of Parallel Dial Index Drives?
A: The design of parallel input and output shafts can significantly optimize the power transmission efficiency. Compared with vertical axis devices, it has lower energy loss, smoother operation and less vibration when transmitting torque through components such as high-precision helical gears; at the same time, this structure saves more installation space in compact industrial production lines, especially suitable for the layout requirements of integrated equipment.
Q: Can the high accuracy (±0.008 degrees and above) of parallel axis index drives be maintained for a long time?
A: Yes. The core components (such as cams and gears) are made of high-quality materials such as hardened alloy steel and manufactured with micron-level precision grinding technology. Even in high-intensity operation for more than 20,000 hours, they can still maintain an indexing accuracy of ±0.008 degrees and above. Simple daily maintenance can further extend the service life of its stable accuracy.
Q: Compared with other indexing devices such as cam indexing tables, what is its core difference?
A: The main differences are reflected in two points:
Axis structure: The parallel axis design (input/output axis are parallel) optimizes power transmission better than the vertical axis structure of some cam indexing tables, and is more efficient in space-constrained scenarios;
Backlash control: It has "backlash-free positioning" capability, which is crucial for ultra-high precision scenarios such as optical instrument calibration, while traditional cam indexing tables may have slight backlash after long-term use.
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