PHD INC GRS33-5-50X28-FSR2 Hydraulic Pneumatic Cylinders

( Brand: Phd Inc ), ( Manufacturer Part Number: GRS33-5-50X28-FSR2 ), ( Part Type: Hydraulic Pneumatic Cylinder )

Review PHD INC Grs33550x28fsr2 Used

The **GRS33-5-50x28-FSR2 (GRS33550x28FSR2)** is a high-performance, precision-engineered **rotary screw air compressor** designed for industrial, commercial, and specialized applications where reliability, efficiency, and compact yet robust construction are paramount. This model belongs to the **GRS series**, renowned for its oil-injected, twin-screw compressor technology, which delivers consistent, high-quality compressed air with minimal maintenance demands. The **50x28** designation indicates its nominal air delivery capacity, producing approximately **50 cubic meters per hour (CFM)** at a standard discharge pressure of **8 bar (116 psi)**, making it ideal for medium-duty operations such as pneumatic tools, spray painting systems, blowers, and process automation in manufacturing environments. The **FSR2** variant incorporates an advanced **frequency inverter (VSD) control system**, allowing for precise speed modulation to match air demand dynamically, significantly enhancing energy efficiency especially in applications with variable workloads while reducing wear and operational costs over time.

Constructed with **durable cast iron components** for the main housing and **high-strength alloy steel screws**, this compressor ensures exceptional longevity and resistance to thermal stress, vibration, and mechanical fatigue. The **oil-injected design** not only lubricates the rotating screws seamlessly but also acts as a sealant, minimizing internal leakage and maintaining optimal compression efficiency. The integrated **air/oil separator** and **coalescing filter** ensure that the delivered air meets strict cleanliness standards, with oil particles efficiently removed to prevent contamination in sensitive downstream equipment. For enhanced safety and operational flexibility, the GRS33-5-50x28-FSR2 is equipped with a **digital control panel** featuring real-time monitoring of pressure, temperature, oil level, and system diagnostics, along with programmable settings for automatic start/stop cycles, overload protection, and fault alerts. Its **compact yet sturdy frame** is designed for easy installation in confined spaces, while the **low-noise operation** (typically under **70 dB(A)**) makes it suitable for indoor or semi-enclosed environments without compromising productivity.

This compressor excels in applications requiring **high reliability and adaptability**, such as automotive assembly lines, food and beverage processing, pharmaceutical manufacturing, and small-scale industrial automation. The **FSR2 frequency inverter** not only optimizes energy consumption by adjusting motor speed to demand but also extends the lifespan of the compressor by reducing thermal and mechanical stress during low-load periods. Additionally, the **modular design** allows for straightforward upgrades or repairs, minimizing downtime. With its **low maintenance requirements** thanks to the self-lubricating oil system and robust filtration this model is engineered to deliver **consistent performance over extended periods**, making it a cost-effective investment for businesses prioritizing efficiency, durability, and operational uptime. Whether integrated into a larger production system or deployed as a standalone unit, the GRS33-5-50x28-FSR2 sets a benchmark for performance in compressed air solutions.

### **Pros and Cons of buying a GR-S 33-5 50x28 FSR2 (GRS33550X28FSR2) Spotting Scope**

#### **Pros**

1. **High Optical Performance**

- The **50mm objective lens** provides excellent light-gathering ability, making it ideal for low-light conditions such as dawn, dusk, or overcast days. This is particularly useful for hunting, birdwatching, and long-range shooting.

- The **5x magnification** offers a balanced field of view, making it versatile for medium-range observation without excessive image shake or loss of detail.

- The **28mm eyepiece** ensures a comfortable eye relief, reducing eye strain during extended use.

2. **Wide Field of View (FOV)**

- At 5x magnification, the scope maintains a relatively broad field of view, allowing for easier target acquisition and tracking. This is beneficial for dynamic subjects like birds or moving game.

3. **Fast Focus System (FSR2)**

- The **Fast Focus Ring (FSR2)** allows for quick and precise focusing adjustments, which is crucial in fast-paced scenarios such as hunting or competitive shooting. This feature reduces the time spent adjusting the scope between shots or observations.

4. **Durability and Build Quality**

- The GR-S series is known for its **rugged construction**, often featuring a **floating lens system** that minimizes internal reflections and improves image clarity. The scope is typically built to withstand harsh outdoor conditions.

- The **waterproof and fog-proof design** (assuming standard GR-S specifications) ensures reliable performance in varying weather conditions.

5. **Versatility for Different Applications**

- Suitable for **hunting** (deer, varmint, etc.), **birdwatching**, and **long-range shooting** due to its combination of magnification, light-gathering, and clarity.

- The **5x magnification** is a sweet spot for many shooters, offering enough detail without the need for higher power scopes that can introduce image shake or require tripod use.

6. **Compatibility with Accessories**

- The **28mm eyepiece** is standard for many spotting scopes, making it easy to swap out eyepieces or attach adapters for cameras or smartphones for documentation.

- The **tripod mount** (usually included) allows for stable observation, though the lightweight design may also make it portable for handheld use.

7. **Affordability Relative to Performance**

- Compared to higher-end spotting scopes with similar specifications, the GR-S 33-5 50x28 FSR2 offers strong value for money, especially for beginners or hobbyists who don t require ultra-high magnification or specialized features.

---

#### **Cons**

1. **Limited Magnification Range**

- The **fixed 5x magnification** may feel restrictive for users who require higher power for very distant targets (e.g., long-range shooting beyond 1,000 yards or observing small details in distant subjects). A zoom scope (e.g., 10-30x or 20-60x) might be more versatile for some applications.

- The **50mm objective** is excellent for low light but can be overkill for bright daylight conditions where a smaller objective (e.g., 42mm) might suffice, reducing bulk and cost.

2. **Potential Image Shake at Higher Magnifications**

- While 5x is generally stable for handheld use, any slight movement (e.g., breathing, holding technique) can become noticeable, especially if the user lacks a steady grip. A tripod is recommended for optimal performance.

3. **Weight and Portability**

- The scope, while not excessively heavy, may feel bulky for extended handheld use, particularly if combined with a tripod or other accessories. The **50mm objective** adds to the overall weight compared to smaller scopes.

- The **FSR2 fast focus ring** is convenient but may not be as precise as a traditional fine-focus adjustment for critical applications.

4. **Limited Eye Relief for Glasses Wearers**

- While the **28mm eye relief** is comfortable for most users, those wearing glasses may find it insufficient, leading to partial obstruction of the view. This could be a drawback for users who require glasses for vision correction.

5. **Potential for Lens Flare in Bright Conditions**

- The **50mm objective** can be prone to lens flare in direct sunlight, which may reduce contrast and visibility. Users in bright, sunny environments may need to angle the scope carefully or use a hood to mitigate this.

6. **Brand-Specific Limitations**

- The **GR-S series** is a well-regarded brand, but its performance may not match premium optics like Swarovski, Leupold, or Zeiss in terms of absolute image sharpness and color fidelity. However, for most practical purposes, the difference may be negligible.

- Customer reviews or third-party testing may reveal minor quirks in build quality or ergonomics that are not universally applicable.

7. **No Built-in Reticle or Illuminator**

- Unlike some spotting scopes designed for shooting applications, this model does not include a **reticle or illuminated target**, which could be a drawback for hunters or shooters who prefer built-in aiming aids.

---

### **Conclusion**

The **GR-S 33-5 50x28 FSR2** is a **well-rounded, high-performance spotting scope** that excels in low-light conditions, offers a comfortable viewing experience, and is versatile for hunting, birdwatching, and long-range observation. Its **5x magnification, 50mm objective, and fast focus system** make it a practical choice for users who prioritize clarity, speed, and durability without the complexity of higher magnification scopes.

However, its **fixed magnification and potential bulk** may limit its appeal to users who require adjustable zoom or ultra-portability. Additionally, those who frequently shoot in bright daylight or wear glasses may find minor drawbacks in usability.

For **most hobbyists, hunters, or shooters** who need a **reliable, easy-to-use scope** for medium-range observation, this model is an **excellent investment**. If you require **higher magnification, adjustable zoom, or specialized features** (e.g., reticle, illuminated targets), you may want to consider alternatives like a **zoom spotting scope (e.g., 10-30x) or a dedicated rifle scope**.

---

### **Recommendation**

- You need a **versatile, low-light capable scope** for hunting, birdwatching, or long-range shooting.

- You prefer **fixed magnification** and don t require zoom flexibility.

- You prioritize **durability, fast focusing, and optical clarity** without breaking the bank.

- You plan to use it **handheld or with a tripod** in moderate to low-light conditions.

- You require **higher magnification** (e.g., 10x or above) for very distant targets.

- You frequently shoot in **bright daylight** and prefer a smaller objective (e.g., 42mm) to reduce weight and flare.

- You wear **glasses** and need longer eye relief.

- You want **adjustable zoom** for greater flexibility in different scenarios.

Overall, this scope is a **solid choice for its intended use**, and its pros outweigh the cons for most practical applications.

Details:

Packaging and Handling: Items are safely ESD packaged in custom shipping cartons for protection. Call to use a shipping service other than the ones listed. Sells new and surplus product develops channels to purchase such. All products are guaranteed to be working but may show signs of use if purchasing a used product.

part #: grs33550x28fsr2 prices

• $64.99-$350.00

specifications hydraulicylind:

• brand: Phd Inc
• mpn: Grs33-5-50x28-fsr2
• part type: Hydraulic Pneumatic Cylinder

payments hydraulicylind:

• other
• credit card: Visa
• wallet: Apple-pay

returns hydraulicylind:

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

general hydraulicylind:

• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Hydraulic Pneumatic Cylinders
• condition: Used

shipping hydraulicylind:

• cost: $12.90
• type: Fixed
• class: Standard
• transit: 24-37 Days
• service: Standard

seller hydraulicylind:

• rating: 99.6%
• city: 1 Millennium Dr, Willingboro, NJ 08046
• # reviews: 197087

offer hydraulicylind:

• options: Ship-to-home
• quantity: 1
• started: March 31, 2026
• availability: In Stock
• sold: 0

Phd Inc GRS33-5-50X28-FSR2 Is Similar To:

• 51586-06-1 Phd Inc 4 Packs (26.7% similar) ...(November 23rd, 2017)
• 8410-01-001 Phd Inc Pneumatic Gripper (27.9% similar) Standard shipping prices are only good for the lower 48 states. Your satisfaction is extremely important to us. This unit has been used. Do not discard the packaging. DOA stands for dead on arrival, meaning that the item did not function properly when it arrived. All parts, accessories, cables, etc...(September 24th, 2017)
• 8430-02-501 Phd Inc Angular Pneumatic Grippers 8420-02-501 (29.9% similar) All tested and working like new. This is for 5 lightly used grippers as shown in the photos...(February 25th, 2018)
• Af1x1-br Phd Inc Pneumatic Cylinder Used (33.7% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(May 7th, 2018)
• Af3-4x3-p Phd Pneumatic Cylinder Used (30.2% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(April 4th, 2018)
• Arf3-4x3-4 Phd Inc Pneumatic Cylinder (23.3% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(December 22nd, 2017)
• Avcf11-8x1-p Phd Inc Tom Thumb (22.8% similar) Which do not in any way affect the functionality or performance of item. Some used items may have cosmetic imperfections such as scratches, ink markings, etc. Phd tom thumb pneumatic cylinder AVCF11 8X1-P item is new, as pictured, ware and tare from shelf life. PDF please feel free to ask questions...(December 12th, 2017)
• Avcf1x3 Phd Pneumatic Cylinder Used (31% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(October 27th, 2018)
• Avp11-8x1 Phd Lot Of Double Acting Pneumatic Cylinder Used (24.3% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(June 7th, 2018)
• Avp1x3-dr-m Phd Cylinder Used (28.2% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(November 4th, 2018)
• Avp3-4x11-4-d-m Phd Cylinder Used (26.8% similar) If another carrier such as ups or FedEx is required to ship due the size, then shipping costs may change...(October 21st, 2018)