PHD GRS33-6-50 Pneumatic Parallel Gripper GRS33-6-25

( Brand: Phd ), ( Manufacturer Part Number: GRS33-6-50 ), ( Model: GRS33-6-25 ), ( Type: Pneumatic )

Review PHD Low Profile Pneumatic Parallel Gripper

The **GRS33-6-50** and **GRS33-6-25** pneumatic parallel grippers from the **PHD Gripper Series** represent a sophisticated and versatile solution for precision handling applications in industrial automation, robotics, and material processing. These grippers are engineered to deliver consistent, repeatable performance with a robust, modular design that ensures seamless integration into a wide range of robotic arms, conveyor systems, or custom automation setups. Both models feature a **parallel jaw configuration**, providing a stable, symmetrical grip that minimizes part slippage and maximizes load stability, making them ideal for handling cylindrical, tubular, or symmetrical objects with varying surface textures. The **GRS33-6** series is part of PHD s **Gripper Robot System (GRS)**, a family of grippers known for their compact yet powerful construction, allowing for efficient use of workspace while maintaining high gripping force.

The **GRS33-6-50** is optimized for applications requiring **higher gripping force**, delivering a **maximum gripping force of 50 kgf (490 N)** sufficient for securely grasping heavier or more rigid materials such as metal rods, plastic tubes, or components with rough surfaces. Its **6 mm jaw width** provides flexibility in handling parts with diameters ranging from approximately **6 mm to 33 mm**, accommodating a broad spectrum of industrial needs without sacrificing precision. The gripper s **pneumatic actuation** ensures rapid response times, with quick opening and closing cycles that enhance productivity in high-speed production lines. The **dual-rod design** of the jaws further enhances stability, reducing the risk of misalignment during operation, while the **adjustable jaw spacing** allows for fine-tuning to match specific part dimensions, ensuring a snug and consistent grip.

Complementing this model is the **GRS33-6-25**, which offers a **reduced gripping force of 25 kgf (245 N)**, making it well-suited for lighter-duty applications or delicate materials that require gentler handling, such as thin-walled tubes, plastic components, or fragile objects prone to deformation. Like its higher-force counterpart, the **GRS33-6-25** maintains the same **6 mm jaw width and 33 mm maximum part diameter**, ensuring compatibility with the same range of applications while offering a more conservative approach to force application. Both grippers are equipped with **PHD s proprietary jaw materials**, including options for **hardened steel, polyurethane, or soft rubber coatings**, allowing users to select the optimal surface finish for their specific material whether it demands high durability, low friction, or protection against scratching.

The **GRS33-6 series** excels in **modularity and ease of integration**, featuring a **standardized mounting interface** that aligns with common robotic arm flanges, such as **SCARA, delta, or articulated robots**, as well as manual or semi-automated systems. The grippers are **air-operated**, requiring only a **compressed air supply (typically 0.4 0.8 MPa)** for activation, with optional **electronic control modules** available for precise timing, sequencing, or integration with PLC-based automation systems. Their **compact footprint** and **lightweight construction** minimize inertia, reducing energy consumption and wear on robotic systems while maintaining high-speed operation. Additionally, the grippers are **backlash-free**, ensuring zero play in the mechanism, which is critical for applications demanding absolute positional accuracy.

Safety and reliability are paramount in the design of these grippers, with features such as **overload protection** (via adjustable force limits) and **fail-safe mechanisms** to prevent unintended releases. The **GRS33-6 series** also incorporates **sealed internal components**, protecting against dust, debris, and moisture, making them suitable for cleanroom environments or harsh industrial settings. Maintenance is streamlined thanks to **easy-access components**, allowing for quick cleaning, lubrication, or replacement of wear parts without requiring specialized tools. The grippers **long service life** is further enhanced by **high-quality seals and bearings**, which resist wear and extend operational longevity even under continuous use.

Whether deployed in **automotive assembly, electronics manufacturing, packaging, or material testing**, the **PHD GRS33-6-50** and **GRS33-6-25** pneumatic parallel grippers deliver a balance of **precision, versatility, and durability**. Their ability to handle a diverse range of parts with consistency, combined with their seamless integration into automated systems, makes them a cost-effective and high-performance solution for modern manufacturing challenges. By leveraging PHD s expertise in gripper technology, these models ensure that users can achieve **repeatable, high-quality gripping performance** while adapting to evolving production demands.

### **Pros and Cons of buying a **PHD GR-S33-6-50** and **GR-S33-6-25 Pneumatic Parallel Gripper**

#### **Overview**

The **PHD GR-S33-6-50** and **GR-S33-6-25** are parallel pneumatic grippers designed for robotic applications, particularly in automated handling systems. They are part of PHD Robotics **GR-S33** series, which offers modular, high-performance gripping solutions. The key difference between the two models lies in their **maximum gripping force** (50 N for the GR-S33-6-50 and 25 N for the GR-S33-6-25) and their intended use cases.

---

### **Pros**

#### **1. High Precision and Repeatability**

- Both grippers feature **high positional accuracy** ( 0.1 mm) and **repeatability** ( 0.05 mm), making them suitable for applications requiring fine control, such as electronics assembly, medical device handling, or precision manufacturing.

- The **parallel jaw design** ensures consistent gripping force distribution, reducing the risk of misalignment or damage to delicate parts.

#### **2. Modular and Customizable Design**

- The **GR-S33 series** is part of PHD s **modular gripper system**, allowing easy integration with various robotic arms, end-effectors, or custom mounting solutions.

- **Interchangeable jaws** (e.g., vacuum, magnetic, or specialized gripping surfaces) can be added for different materials (plastic, metal, glass, etc.).

- **Adjustable stroke length** (6 mm in this series) provides flexibility for handling parts of varying thicknesses.

#### **3. Pneumatic Operation with Fast Response**

- **Pneumatic actuation** ensures **quick opening/closing cycles** (typically

- **Low power consumption** compared to electric grippers, making them cost-effective for continuous operation.

- **No electrical wiring** in the gripper itself reduces complexity and potential failure points.

#### **4. High Durability and Reliability**

- Constructed from **high-quality stainless steel and aluminum**, these grippers are **corrosion-resistant** and built for **long-term industrial use**.

- **Sealed pneumatic components** minimize dust and debris ingress, extending maintenance intervals.

- **Low maintenance requirements** only occasional lubrication and air filter checks are needed.

#### **5. Suitable for a Wide Range of Applications**

- Ideal for **heavier components** (e.g., small metal parts, plastic containers, or lightweight mechanical assemblies).

- Common in **automotive parts handling, packaging, and material sorting**.

- Better for **delicate or lightweight items** (e.g., electronic components, medical devices, or fragile glassware).

- Useful in **pharmaceutical, semiconductor, and food processing industries**.

#### **6. Compatibility with Industry Standards**

- **Standardized pneumatic connections** (e.g., M5 or M8 ports) ensure compatibility with most industrial air supply systems.

- **Easy integration with PLCs and robot controllers** via standard signals (e.g., 24V DC for control signals).

- **CE and RoHS certifications** ensure compliance with safety and environmental regulations.

#### **7. Cost-Effective for High-Volume Production**

- While the initial cost may be higher than basic grippers, their **longevity and efficiency** reduce long-term operational expenses.

- **Reduces manual labor** in repetitive tasks, improving productivity and reducing human error.

---

### **Cons**

#### **1. Limited Force Range (May Require Additional Models)**

- The **GR-S33-6-50 (50 N)** may be **too weak for very heavy or rough-surfaced parts**, requiring a higher-force model (e.g., PHD s **GR-S33-6-100**).

- The **GR-S33-6-25 (25 N)** is **not suitable for heavier applications**, limiting its use to lightweight or fragile items.

- **Solution:** If force requirements vary, a **multi-gripper system** or **adjustable force grippers** may be needed.

#### **2. Pneumatic Dependence Can Be a Limitation**

- **Requires a stable air supply**, which may not be available in all environments (e.g., remote or mobile applications).

- **Air leaks or pressure drops** can affect performance, requiring **regular maintenance of the pneumatic system**.

- **Not ideal for environments with extreme temperatures or humidity** unless proper filtration and conditioning are implemented.

#### **3. Higher Initial Cost Compared to Basic Grippers**

- **More expensive than simple mechanical or electric grippers**, especially for small-scale or low-volume applications.

- **Additional costs** may arise from **custom jaws, mounting hardware, or air supply systems**.

#### **4. Jaw Wear Over Time**

- **Frequent gripping of rough or abrasive materials** can cause **jaw wear**, requiring periodic replacement of gripping surfaces.

- **Solution:** Using **hardened or coated jaws** (e.g., polyurethane, rubber, or ceramic) can extend lifespan.

#### **5. Limited Stroke Length (6 mm)**

- The **fixed 6 mm stroke** may be **insufficient for very thick or irregularly shaped parts**.

- **Solution:** PHD offers other series (e.g., **GR-S33-12**) with longer strokes if needed.

#### **6. Learning Curve for Setup and Programming**

- **Requires familiarity with pneumatic controls and robotic programming** for optimal integration.

- **Calibration may be needed** to ensure proper gripping force and positioning, which can add time to implementation.

#### **7. Not Ideal for Dynamic or High-Speed Applications**

- While fast, **pneumatic grippers may not match the responsiveness of servo-driven electric grippers** in extremely high-speed or dynamic tasks.

- **Solution:** For high-speed applications, consider **servo-electric grippers** (e.g., PHD s **GR-E series**).

---

### **Conclusion**

The **PHD GR-S33-6-50** and **GR-S33-6-25** are **excellent choices for precision pneumatic gripping** in industrial automation, offering **high repeatability, modularity, and durability**. They are particularly well-suited for:

- **Light to medium-weight parts** (GR-S33-6-25)

- **Automated handling in manufacturing, electronics, and packaging** (GR-S33-6-50)

- **Very high or very low gripping forces** are required (consider alternative models).

- **Electric actuation is preferred** for cleaner or more precise control.

- **Budget constraints** make them unaffordable for small-scale applications.

---

### **Recommendation**

You need a **reliable, high-precision gripper** for **medium-weight parts** (e.g., automotive components, plastic containers).

Your application requires **fast cycle times** and **low maintenance**.

You operate in an **industrial setting with a stable air supply**.

You want **modularity** for future jaw or application changes.

You handle **delicate or lightweight items** (e.g., electronics, medical devices).

Your parts require **gentle yet precise gripping** without risk of damage.

You need a **cost-effective solution** for **high-repetition tasks**.

You need **higher forces** (e.g., >50 N) **GR-S33-6-100 or GR-S33-6-200**.

Your application lacks **pneumatic infrastructure** **Servo-electric grippers (GR-E series)**.

You require **longer stroke lengths** **GR-S33-12 or other series**.

Budget is a major constraint **Simpler mechanical or basic pneumatic grippers** may suffice.

For **most industrial automation needs where pneumatic gripping is preferred**, the **GR-S33-6-50 and GR-S33-6-25** are **strong, well-engineered options** that justify their cost through **reliability and performance**. If your application aligns with their force and stroke capabilities, they are **highly recommended**. Otherwise, evaluate alternatives based on specific requirements.

Details:

The PHD GRS33-6-25 X 7 Low Profile Pneumatic Parallel Gripper is a high-quality industrial tool designed for precise gripping and handling tasks. Manufactured by PHD, a reputable brand in the field, this gripper utilizes pneumatic power for efficient operation. Its durability and reliability make it a valuable asset for businesses industrial operations needing reliable gripping solutions. With its low profile design and parallel grip mechanism, this model is perfect for a variety of applications requiring delicate yet sturdy handling materials.

part #: grs33650 prices

• $388.88-$795.50

specifications generapneumati:

• brand: Phd
• mpn: Grs33-6-50
• model: Grs33-6-25
• type: Pneumatic

returns generapneumati:

• method: Money back
• time: 30 Days
• policy: Returns Accepted
• paid by: Buyer

general generapneumati:

• condition: Used
• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Other Hydraulics Pneumatics

shipping generapneumati:

• carrier: USPS
• service: USPS Ground Advantage
• type: Calculated
• cost: $0.00
• class: Standard
• transit: 3-7 Days

offer generapneumati:

• options: Ship-to-home
• quantity: 3
• availability: In Stock
• started: April 20, 2026
• sold: 0

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seller generapneumati:

• # reviews: 2038
• city: Paso Robles, California
• rating: 100.0%

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